deploy: walkLocal worker pool for performance

[ci skip]

.circleci/config.yml

@@ -4,7 +4,7 @@ parameters:
 defaults: &defaults
   resource_class: large
   docker:
-      - image: bepsays/ci-hugoreleaser:1.22300.20000
+      - image: bepsays/ci-hugoreleaser:1.22400.20000
 environment: &buildenv
       GOMODCACHE: /root/project/gomodcache
 version: 2
@@ -14,9 +14,7 @@ jobs:
     environment: &buildenv
         GOMODCACHE: /root/project/gomodcache
     steps:
-      - &remote-docker
+      - setup_remote_docker
-        setup_remote_docker: 
-          version: 20.10.14
       - checkout: 
           path: hugo
       - &git-config
@@ -60,7 +58,7 @@ jobs:
     environment:
         <<: [*buildenv]
     docker:
-    - image: bepsays/ci-hugoreleaser-linux-arm64:1.22300.20000
+    - image: bepsays/ci-hugoreleaser-linux-arm64:1.22400.20000
     steps:
       - *restore-cache
       - &attach-workspace

.github/workflows/image.yml

@@ -1,10 +1,9 @@
 name: Build Docker image
 
 on:
-  push:
+  release:
-    tags:
+    types: [published]
-      - "*"
+  pull_request:
-  workflow_dispatch:
 permissions:
   packages: write
 
@@ -14,18 +13,8 @@ env:
 jobs:
   build:
     runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        platform:
-          - linux/amd64
-          - linux/arm64
-    steps:
-      - name: Prepare
-        run: |
-          platform=${{ matrix.platform }}
-          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
 
+    steps:
       - name: Checkout
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
 
@@ -35,9 +24,6 @@ jobs:
         with:
           images: ${{ env.REGISTRY_IMAGE }}
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@49b3bc8e6bdd4a60e6116a5414239cba5943d3cf # v3.2.0
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
 
@@ -49,69 +35,15 @@ jobs:
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Build and push by digest
+      - name: Build and push
         id: build
         uses: docker/build-push-action@16ebe778df0e7752d2cfcbd924afdbbd89c1a755 # v6.6.1
         with:
           context: .
-          push: ${{ startsWith(github.ref, 'refs/tags') }}
+          provenance: mode=max
-          platforms: ${{ matrix.platform }}
+          sbom: true
+          push: ${{ github.event_name != 'pull_request' }}
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
+          build-args: HUGO_BUILD_TAGS=extended,withdeploy
-
-      - name: Export digest
-        run: |
-          mkdir -p /tmp/digests
-          digest="${{ steps.build.outputs.digest }}"
-          touch "/tmp/digests/${digest#sha256:}"
-
-      - name: Upload digest
-        uses: actions/upload-artifact@834a144ee995460fba8ed112a2fc961b36a5ec5a # v4.3.6
-        with:
-          name: digests-${{ env.PLATFORM_PAIR }}
-          path: /tmp/digests/*
-          if-no-files-found: error
-          retention-days: 1
-
-  merge:
-    runs-on: ubuntu-latest
-    needs:
-      - build
-    steps:
-      - name: Download digests
-        uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
-        with:
-          path: /tmp/digests
-          pattern: digests-*
-          merge-multiple: true
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@988b5a0280414f521da01fcc63a27aeeb4b104db # v3.6.1
-
-      - name: Docker meta
-        id: meta
-        uses: docker/metadata-action@8e5442c4ef9f78752691e2d8f8d19755c6f78e81 # v5.5.1
-        with:
-          images: ${{ env.REGISTRY_IMAGE }}
-
-          flavor: |
-            latest=false
-
-      - name: Login to GHCR
-        uses: docker/login-action@9780b0c442fbb1117ed29e0efdff1e18412f7567 # v3.3.0
-        with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Create manifest list and push
-        if: ${{ startsWith(github.ref, 'refs/tags') }}
-        working-directory: /tmp/digests
-        run: |
-          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
-            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
-
-      - name: Inspect image
-        if: ${{ startsWith(github.ref, 'refs/tags') }}
-        run: |
-          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}

.github/workflows/test.yml

@@ -6,17 +6,17 @@ name: Test
 env:
   GOPROXY: https://proxy.golang.org
   GO111MODULE: on
-  SASS_VERSION: 1.63.2
+  SASS_VERSION: 1.80.3
-  DART_SASS_SHA_LINUX: 3ea33c95ad5c35fda6e9a0956199eef38a398f496cfb8750e02479d7d1dd42af
+  DART_SASS_SHA_LINUX: 7c933edbad0a7d389192c5b79393485c088bd2c4398e32f5754c32af006a9ffd
-  DART_SASS_SHA_MACOS: 11c70f259836b250b44a9cb57fed70e030f21f45069b467d371685855f1eb4f0
+  DART_SASS_SHA_MACOS: 79e060b0e131c3bb3c16926bafc371dc33feab122bfa8c01aa337a072097967b
-  DART_SASS_SHA_WINDOWS: cd8cd36a619dd8e27f93d3186c52d70eb7d69472aa6c85f5094b29693e773f64
+  DART_SASS_SHA_WINDOWS: 0bc4708b37cd1bac4740e83ac5e3176e66b774f77fd5dd364da5b5cfc9bfb469
 permissions:
   contents: read
 jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.22.x, 1.23.x]
+        go-version: [1.23.x, 1.24.x]
         os: [ubuntu-latest, windows-latest] # macos disabled for now because of disk space issues.
     runs-on: ${{ matrix.os }}
     steps:
@@ -112,17 +112,17 @@ jobs:
           sass --version;
           mage -v check;
         env:
-          HUGO_BUILD_TAGS: extended
+          HUGO_BUILD_TAGS: extended,withdeploy
       - if: matrix.os == 'windows-latest'
         # See issue #11052. We limit the build to regular test (no -race flag) on Windows for now.
         name: Test
         run: |
           mage -v test;
         env:
-          HUGO_BUILD_TAGS: extended
+          HUGO_BUILD_TAGS: extended,withdeploy
       - name: Build tags
         run: |
-          go install -tags extended,nodeploy
+          go install -tags extended
       - if: matrix.os == 'ubuntu-latest'
         name: Build for dragonfly
         run: |

.gitignore

@@ -1,3 +1,6 @@
 
 *.test
-imports.*
+imports.*
+dist/
+public/
+.DS_Store 

CONTRIBUTING.md

@@ -1,4 +1,4 @@
->**Note:** We would apprecitate if you hold on with any big refactorings (like renaming deprecated Go packages), mainly because of potential for extra merge work for future coming in in the near future.
+>**Note:** We would appreciate if you hold on with any big refactoring (like renaming deprecated Go packages), mainly because of potential for extra merge work for future coming in in the near future.
 
 # Contributing to Hugo
 
@@ -93,6 +93,7 @@ Most title/subjects should have a lower-cased prefix with a colon and one whites
 * If this commit touches many packages without a common functional topic, prefix with `all:` (e.g. `all: Reformat Go code`)
 * If this is a documentation update, prefix with `docs:`.
 * If nothing of the above applies, just leave the prefix out.
+* Note that the above excludes nouns seen in other repositories, e.g. "chore:".
 
 Also, if your commit references one or more GitHub issues, always end your commit message body with *See #1234* or *Fixes #1234*.
 Replace *1234* with the GitHub issue ID. The last example will close the issue when the commit is merged into *master*.

Dockerfile

@@ -2,44 +2,98 @@
 # Twitter:      https://twitter.com/gohugoio
 # Website:      https://gohugo.io/
 
-FROM golang:1.22.6-alpine AS build
+ARG GO_VERSION="1.24"
+ARG ALPINE_VERSION="3.22"
+ARG DART_SASS_VERSION="1.79.3"
 
-# Optionally set HUGO_BUILD_TAGS to "extended" or "nodeploy" when building like so:
+FROM --platform=$BUILDPLATFORM tonistiigi/xx:1.5.0 AS xx
-#   docker build --build-arg HUGO_BUILD_TAGS=extended .
+FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS gobuild
-ARG HUGO_BUILD_TAGS
+FROM golang:${GO_VERSION}-alpine${ALPINE_VERSION} AS gorun
 
-ARG CGO=1
+
-ENV CGO_ENABLED=${CGO}
+FROM gobuild AS build
-ENV GOOS=linux
+
-ENV GO111MODULE=on
+RUN apk add clang lld
+
+# Set up cross-compilation helpers
+COPY --from=xx / /
+
+ARG TARGETPLATFORM
+RUN xx-apk add musl-dev gcc g++
+
+# Optionally set HUGO_BUILD_TAGS to "none" or "withdeploy" when building like so:
+# docker build --build-arg HUGO_BUILD_TAGS=withdeploy .
+#
+# We build the extended version by default.
+ARG HUGO_BUILD_TAGS="extended"
+ENV CGO_ENABLED=1
+ENV GOPROXY=https://proxy.golang.org
+ENV GOCACHE=/root/.cache/go-build
+ENV GOMODCACHE=/go/pkg/mod
+ARG TARGETPLATFORM
 
 WORKDIR /go/src/github.com/gohugoio/hugo
 
-COPY . /go/src/github.com/gohugoio/hugo/
+# For  --mount=type=cache the value of target is the default cache id, so
+# for the go mod cache it would be good if we could share it with other Go images using the same setup,
+# but the go build cache needs to be per platform.
+# See this comment: https://github.com/moby/buildkit/issues/1706#issuecomment-702238282
+RUN --mount=target=. \
+    --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build,id=go-build-$TARGETPLATFORM <<EOT
+    set -ex
+    xx-go build -tags "$HUGO_BUILD_TAGS" -ldflags "-s -w -X github.com/gohugoio/hugo/common/hugo.vendorInfo=docker" -o /usr/bin/hugo
+    xx-verify /usr/bin/hugo
+EOT
 
-# gcc/g++ are required to build SASS libraries for extended version
+# dart-sass downloads the dart-sass runtime dependency
-RUN apk update && \
+FROM alpine:${ALPINE_VERSION} AS dart-sass
-    apk add --no-cache gcc g++ musl-dev git && \
+ARG TARGETARCH
-    go install github.com/magefile/mage
+ARG DART_SASS_VERSION
+ARG DART_ARCH=${TARGETARCH/amd64/x64}
+WORKDIR /out
+ADD https://github.com/sass/dart-sass/releases/download/${DART_SASS_VERSION}/dart-sass-${DART_SASS_VERSION}-linux-${DART_ARCH}.tar.gz .
+RUN tar -xf dart-sass-${DART_SASS_VERSION}-linux-${DART_ARCH}.tar.gz
 
-RUN mage hugo && mage install
+FROM gorun AS final
 
-# ---
+COPY --from=build /usr/bin/hugo /usr/bin/hugo
 
-FROM alpine:3.18
+# libc6-compat  are required for extended libraries (libsass, libwebp).
+RUN apk add --no-cache \
+    libc6-compat \
+    git \
+    runuser \
+    nodejs \
+    npm
 
-COPY --from=build /go/bin/hugo /usr/bin/hugo
+RUN mkdir -p /var/hugo/bin /cache && \
+    addgroup -Sg 1000 hugo && \
+    adduser -Sg hugo -u 1000 -h /var/hugo hugo && \
+    chown -R hugo: /var/hugo /cache && \
+    # For the Hugo's Git integration to work.
+    runuser -u hugo -- git config --global --add safe.directory /project && \
+    # See https://github.com/gohugoio/hugo/issues/9810
+    runuser -u hugo -- git config --global core.quotepath false
 
-# libc6-compat & libstdc++ are required for extended SASS libraries
+USER hugo:hugo
-# ca-certificates are required to fetch outside resources (like Twitter oEmbeds)
+VOLUME /project
-RUN apk update && \
+WORKDIR /project
-    apk add --no-cache ca-certificates libc6-compat libstdc++ git
+ENV HUGO_CACHEDIR=/cache
+ENV PATH="/var/hugo/bin:$PATH"
 
-VOLUME /site
+COPY scripts/docker/entrypoint.sh /entrypoint.sh
-WORKDIR /site
+COPY --from=dart-sass /out/dart-sass /var/hugo/bin/dart-sass
+
+# Update PATH to reflect the new dependencies.
+# For more complex setups, we should probably find a way to
+# delegate this to the script itself, but this will have to do for now.
+# Also, the dart-sass binary is a little special, other binaries can be put/linked
+# directly in /var/hugo/bin.
+ENV PATH="/var/hugo/bin/dart-sass:$PATH"
 
 # Expose port for live server
 EXPOSE 1313
 
-ENTRYPOINT ["hugo"]
+ENTRYPOINT ["/entrypoint.sh"]
 CMD ["--help"]

README.md

@@ -33,7 +33,7 @@ A fast and flexible static site generator built with love by [bep], [spf13], and
 [![Tests on Linux, MacOS and Windows](https://github.com/gohugoio/hugo/workflows/Test/badge.svg)](https://github.com/gohugoio/hugo/actions?query=workflow%3ATest)
 [![Go Report Card](https://goreportcard.com/badge/github.com/gohugoio/hugo)](https://goreportcard.com/report/github.com/gohugoio/hugo)
 
-[Website] | [Installation] | [Documentation] | [Support] | [Contributing] | <a rel="me" href="https://fosstodon.org/@gohugoio">Mastodon</a> | <a rel="me" href="https://x.com/gohugoiov2">X</a>
+[Website] | [Installation] | [Documentation] | [Support] | [Contributing] | <a rel="me" href="https://fosstodon.org/@gohugoio">Mastodon</a>
 
 ## Overview
 
@@ -65,11 +65,30 @@ See the [features] section of the documentation for a comprehensive summary of H
 
 <p>&nbsp;</p>
 <p float="left">
-  <a href="https://www.linode.com/?utm_campaign=hugosponsor&utm_medium=banner&utm_source=hugogithub" target="_blank"><img src="https://raw.githubusercontent.com/gohugoio/gohugoioTheme/master/assets/images/sponsors/linode-logo_standard_light_medium.png" width="200" alt="Linode"></a>
+  <a href="https://www.linode.com/?utm_campaign=hugosponsor&utm_medium=banner&utm_source=hugogithub" target="_blank"><img src="https://raw.githubusercontent.com/gohugoio/hugoDocs/master/assets/images/sponsors/linode-logo_standard_light_medium.png" width="200" alt="Linode"></a>
 &nbsp;&nbsp;&nbsp;
-  <a href="https://route4me.com/" target="_blank"><img src="https://raw.githubusercontent.com/gohugoio/gohugoioTheme/master/assets/images/sponsors/Route4MeLogoBlueOnWhite.svg" width="200" alt="Route Planning & Route Optimization Software"></a>
+  <a href="https://www.jetbrains.com/go/?utm_source=OSS&utm_medium=referral&utm_campaign=hugo" target="_blank"><img src="https://raw.githubusercontent.com/gohugoio/hugoDocs/master/assets/images/sponsors/goland.svg" width="200" alt="The complete IDE crafted for professional Go developers."></a>
+  &nbsp;&nbsp;&nbsp;
+  <a href="https://pinme.eth.limo/?s=hugo" target="_blank"><img src="https://raw.githubusercontent.com/gohugoio/hugoDocs/master/assets/images/sponsors/logo-pinme.svg" width="200" alt="PinMe."></a>
 </p>
 
+## Editions
+
+Hugo is available in three editions: standard, extended, and extended/deploy. While the standard edition provides core functionality, the extended and extended/deploy editions offer advanced features.
+
+Feature|extended edition|extended/deploy edition
+:--|:-:|:-:
+Encode to the WebP format when [processing images]. You can decode WebP images with any edition.|:heavy_check_mark:|:heavy_check_mark:
+[Transpile Sass to CSS] using the embedded LibSass transpiler. You can use the [Dart Sass] transpiler with any edition.|:heavy_check_mark:|:heavy_check_mark:
+Deploy your site directly to a Google Cloud Storage bucket, an AWS S3 bucket, or an Azure Storage container. See&nbsp;[details].|:x:|:heavy_check_mark:
+
+[dart sass]: https://gohugo.io/functions/css/sass/#dart-sass
+[processing images]: https://gohugo.io/content-management/image-processing/
+[transpile sass to css]: https://gohugo.io/functions/css/sass/
+[details]: https://gohugo.io/hosting-and-deployment/hugo-deploy/
+
+Unless your specific deployment needs require the extended/deploy edition, we recommend the extended edition.
+
 ## Installation
 
 Install Hugo from a [prebuilt binary], package manager, or package repository. Please see the installation instructions for your operating system:
@@ -81,15 +100,11 @@ Install Hugo from a [prebuilt binary], package manager, or package repository. P
 
 ## Build from source
 
-Hugo is available in two editions: standard and extended. With the extended edition you can:
-
-- Encode to the WebP format when processing images. You can decode WebP images with either edition.
-- Transpile Sass to CSS using the embedded LibSass transpiler. The extended edition is not required to use the Dart Sass transpiler.
-
 Prerequisites to build Hugo from source:
 
-- Standard edition: Go 1.20 or later
+- Standard edition: Go 1.23.0 or later
-- Extended edition: Go 1.20 or later, and GCC
+- Extended edition: Go 1.23.0 or later, and GCC
+- Extended/deploy edition: Go 1.23.0 or later, and GCC
 
 Build the standard edition:
 
@@ -102,6 +117,13 @@ Build the extended edition:
 ```text
 CGO_ENABLED=1 go install -tags extended github.com/gohugoio/hugo@latest
 ```
+
+Build the extended/deploy edition:
+
+```text
+CGO_ENABLED=1 go install -tags extended,withdeploy github.com/gohugoio/hugo@latest
+```
+
 ## Star History
 
 [![Star History Chart](https://api.star-history.com/svg?repos=gohugoio/hugo&type=Timeline)](https://star-history.com/#gohugoio/hugo&Timeline)
@@ -148,153 +170,113 @@ Hugo stands on the shoulders of great open source libraries. Run `hugo env --log
 <summary>See current dependencies</summary>
 
 ```text
-cloud.google.com/go/compute/metadata="v0.2.3"
-cloud.google.com/go/iam="v1.1.5"
-cloud.google.com/go/storage="v1.35.1"
-cloud.google.com/go="v0.110.10"
-github.com/Azure/azure-sdk-for-go/sdk/azcore="v1.9.0"
-github.com/Azure/azure-sdk-for-go/sdk/azidentity="v1.4.0"
-github.com/Azure/azure-sdk-for-go/sdk/internal="v1.5.0"
-github.com/Azure/azure-sdk-for-go/sdk/storage/azblob="v1.2.0"
-github.com/Azure/go-autorest/autorest/to="v0.4.0"
-github.com/AzureAD/microsoft-authentication-library-for-go="v1.2.0"
 github.com/BurntSushi/locker="v0.0.0-20171006230638-a6e239ea1c69"
-github.com/alecthomas/chroma/v2="v2.14.0"
+github.com/PuerkitoBio/goquery="v1.10.1"
+github.com/alecthomas/chroma/v2="v2.15.0"
+github.com/andybalholm/cascadia="v1.3.3"
 github.com/armon/go-radix="v1.0.1-0.20221118154546-54df44f2176c"
-github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream="v1.5.4"
-github.com/aws/aws-sdk-go-v2/config="v1.26.1"
-github.com/aws/aws-sdk-go-v2/credentials="v1.16.12"
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds="v1.14.10"
-github.com/aws/aws-sdk-go-v2/feature/s3/manager="v1.15.7"
-github.com/aws/aws-sdk-go-v2/internal/configsources="v1.3.5"
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2="v2.6.5"
-github.com/aws/aws-sdk-go-v2/internal/ini="v1.7.2"
-github.com/aws/aws-sdk-go-v2/internal/v4a="v1.2.9"
-github.com/aws/aws-sdk-go-v2/service/cloudfront="v1.35.4"
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding="v1.10.4"
-github.com/aws/aws-sdk-go-v2/service/internal/checksum="v1.2.9"
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url="v1.10.9"
-github.com/aws/aws-sdk-go-v2/service/internal/s3shared="v1.16.9"
-github.com/aws/aws-sdk-go-v2/service/s3="v1.47.5"
-github.com/aws/aws-sdk-go-v2/service/sso="v1.18.5"
-github.com/aws/aws-sdk-go-v2/service/ssooidc="v1.21.5"
-github.com/aws/aws-sdk-go-v2/service/sts="v1.26.5"
-github.com/aws/aws-sdk-go-v2="v1.26.1"
-github.com/aws/aws-sdk-go="v1.50.7"
-github.com/aws/smithy-go="v1.20.2"
 github.com/bep/clocks="v0.5.0"
 github.com/bep/debounce="v1.2.0"
-github.com/bep/gitmap="v1.1.2"
+github.com/bep/gitmap="v1.6.0"
 github.com/bep/goat="v0.5.0"
-github.com/bep/godartsass/v2="v2.0.0"
+github.com/bep/godartsass/v2="v2.3.2"
-github.com/bep/godartsass="v1.2.0"
+github.com/bep/golibsass="v1.2.0"
-github.com/bep/golibsass="v1.1.1"
 github.com/bep/gowebp="v0.3.0"
-github.com/bep/lazycache="v0.4.0"
+github.com/bep/imagemeta="v0.8.4"
+github.com/bep/lazycache="v0.7.0"
 github.com/bep/logg="v0.4.0"
 github.com/bep/mclib="v1.20400.20402"
 github.com/bep/overlayfs="v0.9.2"
-github.com/bep/simplecobra="v0.4.0"
+github.com/bep/simplecobra="v0.5.0"
 github.com/bep/tmc="v0.5.1"
+github.com/cespare/xxhash/v2="v2.3.0"
 github.com/clbanning/mxj/v2="v2.7.0"
-github.com/cli/safeexec="v1.0.1"
+github.com/cpuguy83/go-md2man/v2="v2.0.4"
-github.com/cpuguy83/go-md2man/v2="v2.0.3"
 github.com/disintegration/gift="v1.2.1"
-github.com/dlclark/regexp2="v1.11.0"
+github.com/dlclark/regexp2="v1.11.5"
-github.com/dustin/go-humanize="v1.0.1"
+github.com/dop251/goja="v0.0.0-20250125213203-5ef83b82af17"
-github.com/evanw/esbuild="v0.21.4"
+github.com/evanw/esbuild="v0.24.2"
-github.com/fatih/color="v1.16.0"
+github.com/fatih/color="v1.18.0"
 github.com/frankban/quicktest="v1.14.6"
-github.com/fsnotify/fsnotify="v1.7.0"
+github.com/fsnotify/fsnotify="v1.8.0"
-github.com/getkin/kin-openapi="v0.123.0"
+github.com/getkin/kin-openapi="v0.129.0"
 github.com/ghodss/yaml="v1.0.0"
-github.com/go-openapi/jsonpointer="v0.20.2"
+github.com/go-openapi/jsonpointer="v0.21.0"
-github.com/go-openapi/swag="v0.22.8"
+github.com/go-openapi/swag="v0.23.0"
-github.com/gobuffalo/flect="v1.0.2"
+github.com/go-sourcemap/sourcemap="v2.1.4+incompatible"
+github.com/gobuffalo/flect="v1.0.3"
 github.com/gobwas/glob="v0.2.3"
 github.com/gohugoio/go-i18n/v2="v2.1.3-0.20230805085216-e63c13218d0e"
+github.com/gohugoio/hashstructure="v0.5.0"
 github.com/gohugoio/httpcache="v0.7.0"
 github.com/gohugoio/hugo-goldmark-extensions/extras="v0.2.0"
-github.com/gohugoio/hugo-goldmark-extensions/passthrough="v0.2.0"
+github.com/gohugoio/hugo-goldmark-extensions/passthrough="v0.3.0"
 github.com/gohugoio/locales="v0.14.0"
 github.com/gohugoio/localescompressed="v1.0.1"
-github.com/golang-jwt/jwt/v5="v5.1.0"
+github.com/golang/freetype="v0.0.0-20170609003504-e2365dfdc4a0"
-github.com/golang/groupcache="v0.0.0-20210331224755-41bb18bfe9da"
-github.com/golang/protobuf="v1.5.3"
 github.com/google/go-cmp="v0.6.0"
-github.com/google/s2a-go="v0.1.7"
+github.com/google/pprof="v0.0.0-20250208200701-d0013a598941"
-github.com/google/uuid="v1.4.0"
+github.com/gorilla/websocket="v1.5.3"
-github.com/google/wire="v0.5.0"
+github.com/hairyhenderson/go-codeowners="v0.7.0"
-github.com/googleapis/enterprise-certificate-proxy="v0.3.2"
-github.com/googleapis/gax-go/v2="v2.12.0"
-github.com/gorilla/websocket="v1.5.1"
-github.com/hairyhenderson/go-codeowners="v0.4.0"
 github.com/hashicorp/golang-lru/v2="v2.0.7"
-github.com/invopop/yaml="v0.2.0"
 github.com/jdkato/prose="v1.2.1"
-github.com/jmespath/go-jmespath="v0.4.0"
 github.com/josharian/intern="v1.0.0"
 github.com/kr/pretty="v0.3.1"
 github.com/kr/text="v0.2.0"
-github.com/kylelemons/godebug="v1.1.0"
+github.com/kyokomi/emoji/v2="v2.2.13"
-github.com/kyokomi/emoji/v2="v2.2.12"
+github.com/lucasb-eyer/go-colorful="v1.2.0"
 github.com/mailru/easyjson="v0.7.7"
 github.com/makeworld-the-better-one/dither/v2="v2.4.0"
 github.com/marekm4/color-extractor="v1.2.1"
 github.com/mattn/go-colorable="v0.1.13"
 github.com/mattn/go-isatty="v0.0.20"
 github.com/mattn/go-runewidth="v0.0.9"
-github.com/mitchellh/hashstructure="v1.1.0"
+github.com/mazznoer/csscolorparser="v0.1.5"
 github.com/mitchellh/mapstructure="v1.5.1-0.20231216201459-8508981c8b6c"
 github.com/mohae/deepcopy="v0.0.0-20170929034955-c48cc78d4826"
 github.com/muesli/smartcrop="v0.3.0"
 github.com/niklasfasching/go-org="v1.7.0"
+github.com/oasdiff/yaml3="v0.0.0-20241210130736-a94c01f36349"
+github.com/oasdiff/yaml="v0.0.0-20241210131133-6b86fb107d80"
 github.com/olekukonko/tablewriter="v0.0.5"
 github.com/pbnjay/memory="v0.0.0-20210728143218-7b4eea64cf58"
-github.com/pelletier/go-toml/v2="v2.2.2"
+github.com/pelletier/go-toml/v2="v2.2.3"
 github.com/perimeterx/marshmallow="v1.1.5"
-github.com/pkg/browser="v0.0.0-20210911075715-681adbf594b8"
+github.com/pkg/browser="v0.0.0-20240102092130-5ac0b6a4141c"
 github.com/pkg/errors="v0.9.1"
-github.com/rogpeppe/go-internal="v1.12.0"
+github.com/rivo/uniseg="v0.4.7"
+github.com/rogpeppe/go-internal="v1.13.1"
 github.com/russross/blackfriday/v2="v2.1.0"
-github.com/rwcarlsen/goexif="v0.0.0-20190401172101-9e8deecbddbd"
+github.com/sass/libsass="3.6.6"
-github.com/sass/dart-sass/compiler="1.77.5"
-github.com/sass/dart-sass/implementation="1.77.5"
-github.com/sass/dart-sass/protocol="2.7.1"
-github.com/sass/libsass="3.6.5"
 github.com/spf13/afero="v1.11.0"
-github.com/spf13/cast="v1.6.0"
+github.com/spf13/cast="v1.7.1"
-github.com/spf13/cobra="v1.8.0"
+github.com/spf13/cobra="v1.8.1"
 github.com/spf13/fsync="v0.10.1"
-github.com/spf13/pflag="v1.0.5"
+github.com/spf13/pflag="v1.0.6"
-github.com/tdewolff/minify/v2="v2.20.20"
+github.com/tdewolff/minify/v2="v2.20.37"
-github.com/tdewolff/parse/v2="v2.7.13"
+github.com/tdewolff/parse/v2="v2.7.15"
+github.com/tetratelabs/wazero="v1.8.2"
 github.com/webmproject/libwebp="v1.3.2"
-github.com/yuin/goldmark-emoji="v1.0.3"
+github.com/yuin/goldmark-emoji="v1.0.4"
-github.com/yuin/goldmark="v1.7.4"
+github.com/yuin/goldmark="v1.7.8"
-go.opencensus.io="v0.24.0"
 go.uber.org/automaxprocs="v1.5.3"
-gocloud.dev="v0.36.0"
+golang.org/x/crypto="v0.33.0"
-golang.org/x/crypto="v0.23.0"
+golang.org/x/exp="v0.0.0-20250210185358-939b2ce775ac"
-golang.org/x/exp="v0.0.0-20221031165847-c99f073a8326"
+golang.org/x/image="v0.24.0"
-golang.org/x/image="v0.16.0"
+golang.org/x/mod="v0.23.0"
-golang.org/x/mod="v0.17.0"
+golang.org/x/net="v0.35.0"
-golang.org/x/net="v0.25.0"
+golang.org/x/sync="v0.11.0"
-golang.org/x/oauth2="v0.15.0"
+golang.org/x/sys="v0.30.0"
-golang.org/x/sync="v0.7.0"
+golang.org/x/text="v0.22.0"
-golang.org/x/sys="v0.20.0"
+golang.org/x/tools="v0.30.0"
-golang.org/x/text="v0.15.0"
+golang.org/x/xerrors="v0.0.0-20240903120638-7835f813f4da"
-golang.org/x/time="v0.5.0"
+gonum.org/v1/plot="v0.15.0"
-golang.org/x/tools="v0.20.0"
+google.golang.org/protobuf="v1.36.5"
-golang.org/x/xerrors="v0.0.0-20231012003039-104605ab7028"
-google.golang.org/api="v0.152.0"
-google.golang.org/genproto/googleapis/api="v0.0.0-20231120223509-83a465c0220f"
-google.golang.org/genproto/googleapis/rpc="v0.0.0-20231120223509-83a465c0220f"
-google.golang.org/genproto="v0.0.0-20231120223509-83a465c0220f"
-google.golang.org/grpc="v1.59.0"
-google.golang.org/protobuf="v1.33.0"
 gopkg.in/yaml.v2="v2.4.0"
 gopkg.in/yaml.v3="v3.0.1"
+oss.terrastruct.com/d2="v0.6.9"
+oss.terrastruct.com/util-go="v0.0.0-20241005222610-44c011a04896"
+rsc.io/qr="v0.2.0"
 software.sslmate.com/src/go-pkcs12="v0.2.0"
 ```
 </details>

bench.sh

@@ -1,37 +0,0 @@
-#!/usr/bin/env bash
-
-# allow user to override go executable by running as GOEXE=xxx make ...
-GOEXE="${GOEXE-go}"
-
-# Convenience script to
-# - For a given branch
-# - Run  benchmark tests for a given package
-# - Do the same for master
-# - then compare the two runs with benchcmp
-
-benchFilter=".*"
-
-if (( $# < 2 ));
-  then
-    echo "USAGE: ./bench.sh <git-branch> <package-to-bench> (and <benchmark filter> (regexp, optional))"
-    exit 1
-fi
-
-
-
-if [ $# -eq 3 ]; then
-  benchFilter=$3
-fi
-
-
-BRANCH=$1
-PACKAGE=$2
-
-git checkout $BRANCH
-"${GOEXE}" test -test.run=NONE -bench="$benchFilter" -test.benchmem=true ./$PACKAGE > /tmp/bench-$PACKAGE-$BRANCH.txt
-
-git checkout master
-"${GOEXE}" test -test.run=NONE -bench="$benchFilter" -test.benchmem=true ./$PACKAGE > /tmp/bench-$PACKAGE-master.txt
-
-
-benchcmp /tmp/bench-$PACKAGE-master.txt /tmp/bench-$PACKAGE-$BRANCH.txt

benchSite.sh

@@ -1,12 +0,0 @@
-#!/bin/bash
-
-# allow user to override go executable by running as GOEXE=xxx make ...
-GOEXE="${GOEXE-go}"
-
-# Send in a regexp matching the benchmarks you want to run, i.e. './benchSite.sh "YAML"'.
-# Note the quotes, which will be needed for more complex expressions.
-# The above will run all variations, but only for front matter YAML.
-
-echo "Running with BenchmarkSiteBuilding/${1}"
-
-"${GOEXE}" test -run="NONE" -bench="BenchmarkSiteBuilding/${1}" -test.benchmem=true ./hugolib -memprofile mem.prof -count 3 -cpuprofile cpu.prof

benchbep.sh

@@ -1 +0,0 @@
-gobench -package=./hugolib -bench="BenchmarkSiteNew/Deep_content_tree"

bepdock.sh

@@ -1 +0,0 @@
-docker run --rm --mount type=bind,source="$(pwd)",target=/hugo -w /hugo  -i -t bepsays/ci-goreleaser:1.11-2 /bin/bash

cache/dynacache/dynacache.go

@@ -176,11 +176,12 @@ func (c *Cache) ClearMatching(predicatePartition func(k string, p PartitionManag
 }
 
 // ClearOnRebuild prepares the cache for a new rebuild taking the given changeset into account.
-func (c *Cache) ClearOnRebuild(changeset ...identity.Identity) {
+// predicate is optional and will clear any entry for which it returns true.
+func (c *Cache) ClearOnRebuild(predicate func(k, v any) bool, changeset ...identity.Identity) {
 	g := rungroup.Run[PartitionManager](context.Background(), rungroup.Config[PartitionManager]{
 		NumWorkers: len(c.partitions),
 		Handle: func(ctx context.Context, partition PartitionManager) error {
-			partition.clearOnRebuild(changeset...)
+			partition.clearOnRebuild(predicate, changeset...)
 			return nil
 		},
 	})
@@ -430,12 +431,25 @@ func (p *Partition[K, V]) doGetOrCreateWitTimeout(key K, duration time.Duration,
 	errch := make(chan error, 1)
 
 	go func() {
-		v, _, err := p.c.GetOrCreate(key, create)
+		var (
-		if err != nil {
+			v   V
-			errch <- err
+			err error
-			return
+		)
-		}
+		defer func() {
-		resultch <- v
+			if r := recover(); r != nil {
+				if rerr, ok := r.(error); ok {
+					err = rerr
+				} else {
+					err = fmt.Errorf("panic: %v", r)
+				}
+			}
+			if err != nil {
+				errch <- err
+			} else {
+				resultch <- v
+			}
+		}()
+		v, _, err = p.c.GetOrCreate(key, create)
 	}()
 
 	select {
@@ -466,7 +480,12 @@ func (p *Partition[K, V]) clearMatching(predicate func(k, v any) bool) {
 	})
 }
 
-func (p *Partition[K, V]) clearOnRebuild(changeset ...identity.Identity) {
+func (p *Partition[K, V]) clearOnRebuild(predicate func(k, v any) bool, changeset ...identity.Identity) {
+	if predicate == nil {
+		predicate = func(k, v any) bool {
+			return false
+		}
+	}
 	opts := p.getOptions()
 	if opts.ClearWhen == ClearNever {
 		return
@@ -512,7 +531,7 @@ func (p *Partition[K, V]) clearOnRebuild(changeset ...identity.Identity) {
 	// Second pass needs to be done in a separate loop to catch any
 	// elements marked as stale in the other partitions.
 	p.c.DeleteFunc(func(key K, v V) bool {
-		if shouldDelete(key, v) {
+		if predicate(key, v) || shouldDelete(key, v) {
 			p.trace.Log(
 				logg.StringFunc(
 					func() string {
@@ -588,7 +607,7 @@ type PartitionManager interface {
 	adjustMaxSize(addend int) int
 	getMaxSize() int
 	getOptions() OptionsPartition
-	clearOnRebuild(changeset ...identity.Identity)
+	clearOnRebuild(predicate func(k, v any) bool, changeset ...identity.Identity)
 	clearMatching(predicate func(k, v any) bool)
 	clearStale()
 }

cache/dynacache/dynacache_test.go

@@ -14,8 +14,11 @@
 package dynacache
 
 import (
+	"errors"
+	"fmt"
 	"path/filepath"
 	"testing"
+	"time"
 
 	qt "github.com/frankban/quicktest"
 	"github.com/gohugoio/hugo/common/loggers"
@@ -144,13 +147,13 @@ func TestClear(t *testing.T) {
 
 	c.Assert(cache.Keys(predicateAll), qt.HasLen, 4)
 
-	cache.ClearOnRebuild()
+	cache.ClearOnRebuild(nil)
 
 	// Stale items are always cleared.
 	c.Assert(cache.Keys(predicateAll), qt.HasLen, 2)
 
 	cache = newTestCache(t)
-	cache.ClearOnRebuild(identity.StringIdentity("changed"))
+	cache.ClearOnRebuild(nil, identity.StringIdentity("changed"))
 
 	c.Assert(cache.Keys(nil), qt.HasLen, 1)
 
@@ -165,6 +168,58 @@ func TestClear(t *testing.T) {
 	cache.adjustCurrentMaxSize()
 }
 
+func TestPanicInCreate(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+	cache := newTestCache(t)
+
+	p1 := GetOrCreatePartition[string, testItem](cache, "/aaaa/bbbb", OptionsPartition{Weight: 30, ClearWhen: ClearOnRebuild})
+
+	willPanic := func(i int) func() {
+		return func() {
+			p1.GetOrCreate(fmt.Sprintf("panic-%d", i), func(key string) (testItem, error) {
+				panic(errors.New(key))
+			})
+		}
+	}
+
+	// GetOrCreateWitTimeout needs to recover from panics in the create func.
+	willErr := func(i int) error {
+		_, err := p1.GetOrCreateWitTimeout(fmt.Sprintf("error-%d", i), 10*time.Second, func(key string) (testItem, error) {
+			return testItem{}, errors.New(key)
+		})
+		return err
+	}
+
+	for i := range 3 {
+		for range 3 {
+			c.Assert(willPanic(i), qt.PanicMatches, fmt.Sprintf("panic-%d", i))
+			c.Assert(willErr(i), qt.ErrorMatches, fmt.Sprintf("error-%d", i))
+		}
+	}
+
+	// Test the same keys again without the panic.
+	for i := range 3 {
+		for range 3 {
+			v, err := p1.GetOrCreate(fmt.Sprintf("panic-%d", i), func(key string) (testItem, error) {
+				return testItem{
+					name: key,
+				}, nil
+			})
+			c.Assert(err, qt.IsNil)
+			c.Assert(v.name, qt.Equals, fmt.Sprintf("panic-%d", i))
+
+			v, err = p1.GetOrCreateWitTimeout(fmt.Sprintf("error-%d", i), 10*time.Second, func(key string) (testItem, error) {
+				return testItem{
+					name: key,
+				}, nil
+			})
+			c.Assert(err, qt.IsNil)
+			c.Assert(v.name, qt.Equals, fmt.Sprintf("error-%d", i))
+		}
+	}
+}
+
 func TestAdjustCurrentMaxSize(t *testing.T) {
 	t.Parallel()
 	c := qt.New(t)

cache/filecache/filecache_pruner_test.go

@@ -59,7 +59,7 @@ dir = ":resourceDir/_gen"
 		caches, err := filecache.NewCaches(p)
 		c.Assert(err, qt.IsNil)
 		cache := caches[name]
-		for i := 0; i < 10; i++ {
+		for i := range 10 {
 			id := fmt.Sprintf("i%d", i)
 			cache.GetOrCreateBytes(id, func() ([]byte, error) {
 				return []byte("abc"), nil
@@ -74,7 +74,7 @@ dir = ":resourceDir/_gen"
 		c.Assert(err, qt.IsNil)
 		c.Assert(count, qt.Equals, 5, msg)
 
-		for i := 0; i < 10; i++ {
+		for i := range 10 {
 			id := fmt.Sprintf("i%d", i)
 			v := cache.GetString(id)
 			if i < 5 {
@@ -97,7 +97,7 @@ dir = ":resourceDir/_gen"
 		c.Assert(count, qt.Equals, 4)
 
 		// Now only the i5 should be left.
-		for i := 0; i < 10; i++ {
+		for i := range 10 {
 			id := fmt.Sprintf("i%d", i)
 			v := cache.GetString(id)
 			if i != 5 {

cache/filecache/filecache_test.go

@@ -105,7 +105,7 @@ dir = ":cacheDir/c"
 		}
 
 		for _, ca := range []*filecache.Cache{caches.ImageCache(), caches.AssetsCache(), caches.GetJSONCache(), caches.GetCSVCache()} {
-			for i := 0; i < 2; i++ {
+			for range 2 {
 				info, r, err := ca.GetOrCreate("a", rf("abc"))
 				c.Assert(err, qt.IsNil)
 				c.Assert(r, qt.Not(qt.IsNil))
@@ -193,11 +193,11 @@ dir = "/cache/c"
 
 	var wg sync.WaitGroup
 
-	for i := 0; i < 50; i++ {
+	for i := range 50 {
 		wg.Add(1)
 		go func(i int) {
 			defer wg.Done()
-			for j := 0; j < 20; j++ {
+			for range 20 {
 				ca := caches.Get(cacheName)
 				c.Assert(ca, qt.Not(qt.IsNil))
 				filename, data := filenameData(i)

cache/httpcache/httpcache.go

@@ -42,7 +42,7 @@ var DefaultConfig = Config{
 
 // Config holds the configuration for the HTTP cache.
 type Config struct {
-	// Configures the HTTP cache behaviour (RFC 9111).
+	// Configures the HTTP cache behavior (RFC 9111).
 	// When this is not enabled for a resource, Hugo will go straight to the file cache.
 	Cache Cache
 
@@ -52,7 +52,7 @@ type Config struct {
 }
 
 type Cache struct {
-	// Enable HTTP cache behaviour (RFC 9111) for these rsources.
+	// Enable HTTP cache behavior (RFC 9111) for these resources.
 	For GlobMatcher
 }
 
@@ -122,6 +122,10 @@ type GlobMatcher struct {
 	Includes []string
 }
 
+func (gm GlobMatcher) IsZero() bool {
+	return len(gm.Includes) == 0 && len(gm.Excludes) == 0
+}
+
 type ConfigCompiled struct {
 	For         predicate.P[string]
 	PollConfigs []PollConfigCompiled
@@ -155,6 +159,9 @@ func (p PollConfigCompiled) IsZero() bool {
 }
 
 func (gm *GlobMatcher) CompilePredicate() (func(string) bool, error) {
+	if gm.IsZero() {
+		panic("no includes or excludes")
+	}
 	var p predicate.P[string]
 	for _, include := range gm.Includes {
 		g, err := glob.Compile(include, '/')
@@ -181,7 +188,7 @@ func (gm *GlobMatcher) CompilePredicate() (func(string) bool, error) {
 	return p, nil
 }
 
-func DecodeConfig(bcfg config.BaseConfig, m map[string]any) (Config, error) {
+func DecodeConfig(_ config.BaseConfig, m map[string]any) (Config, error) {
 	if len(m) == 0 {
 		return DefaultConfig, nil
 	}
@@ -203,5 +210,20 @@ func DecodeConfig(bcfg config.BaseConfig, m map[string]any) (Config, error) {
 		return c, err
 	}
 
+	if c.Cache.For.IsZero() {
+		c.Cache.For = DefaultConfig.Cache.For
+	}
+
+	for pci := range c.Polls {
+		if c.Polls[pci].For.IsZero() {
+			c.Polls[pci].For = DefaultConfig.Cache.For
+			c.Polls[pci].Disable = true
+		}
+	}
+
+	if len(c.Polls) == 0 {
+		c.Polls = DefaultConfig.Polls
+	}
+
 	return c, nil
 }

cache/httpcache/httpcache_integration_test.go

@@ -22,6 +22,8 @@ import (
 )
 
 func TestConfigCustom(t *testing.T) {
+	t.Parallel()
+
 	files := `
 -- hugo.toml --
 [httpcache]
@@ -51,6 +53,8 @@ includes = ["**gohugo.io**"]
 }
 
 func TestConfigDefault(t *testing.T) {
+	t.Parallel()
+
 	files := `
 -- hugo.toml --
 `
@@ -62,3 +66,30 @@ func TestConfigDefault(t *testing.T) {
 	b.Assert(compiled.For("https://gohugo.io/foo.jpg"), qt.IsFalse)
 	b.Assert(compiled.PollConfigFor("https://gohugo.io/foo.jpg").Config.Disable, qt.IsTrue)
 }
+
+func TestConfigPollsOnly(t *testing.T) {
+	t.Parallel()
+	files := `
+-- hugo.toml --
+[httpcache]
+[[httpcache.polls]]
+low = "5s"
+high = "32s"
+[httpcache.polls.for]
+includes = ["**gohugo.io**"]
+		
+	
+`
+
+	b := hugolib.Test(t, files)
+
+	compiled := b.H.Configs.Base.C.HTTPCache
+
+	b.Assert(compiled.For("https://gohugo.io/posts.json"), qt.IsFalse)
+	b.Assert(compiled.For("https://gohugo.io/foo.jpg"), qt.IsFalse)
+
+	pc := compiled.PollConfigFor("https://gohugo.io/foo.jpg")
+	b.Assert(pc.Config.Low, qt.Equals, 5*time.Second)
+	b.Assert(pc.Config.High, qt.Equals, 32*time.Second)
+	b.Assert(compiled.PollConfigFor("https://example.com/foo.jpg").IsZero(), qt.IsTrue)
+}

cache/httpcache/httpcache_test.go

@@ -17,6 +17,7 @@ import (
 	"testing"
 
 	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/config"
 )
 
 func TestGlobMatcher(t *testing.T) {
@@ -40,3 +41,33 @@ func TestGlobMatcher(t *testing.T) {
 	c.Assert(p("foo/bar/foo.css"), qt.IsFalse)
 	c.Assert(p("foo/bar/foo.xml"), qt.IsTrue)
 }
+
+func TestDefaultConfig(t *testing.T) {
+	c := qt.New(t)
+
+	_, err := DefaultConfig.Compile()
+	c.Assert(err, qt.IsNil)
+}
+
+func TestDecodeConfigInjectsDefaultAndCompiles(t *testing.T) {
+	c := qt.New(t)
+
+	cfg, err := DecodeConfig(config.BaseConfig{}, map[string]interface{}{})
+	c.Assert(err, qt.IsNil)
+	c.Assert(cfg, qt.DeepEquals, DefaultConfig)
+
+	_, err = cfg.Compile()
+	c.Assert(err, qt.IsNil)
+
+	cfg, err = DecodeConfig(config.BaseConfig{}, map[string]any{
+		"cache": map[string]any{
+			"polls": []map[string]any{
+				{"disable": true},
+			},
+		},
+	})
+	c.Assert(err, qt.IsNil)
+
+	_, err = cfg.Compile()
+	c.Assert(err, qt.IsNil)
+}

codegen/methods.go

@@ -26,6 +26,7 @@ import (
 	"path/filepath"
 	"reflect"
 	"regexp"
+	"slices"
 	"sort"
 	"strings"
 	"sync"
@@ -102,7 +103,7 @@ func (c *Inspector) MethodsFromTypes(include []reflect.Type, exclude []reflect.T
 	}
 
 	for _, t := range include {
-		for i := 0; i < t.NumMethod(); i++ {
+		for i := range t.NumMethod() {
 
 			m := t.Method(i)
 			if excludes[m.Name] || seen[m.Name] {
@@ -122,7 +123,7 @@ func (c *Inspector) MethodsFromTypes(include []reflect.Type, exclude []reflect.T
 
 			method := Method{Owner: t, OwnerName: ownerName, Name: m.Name}
 
-			for i := 0; i < numIn; i++ {
+			for i := range numIn {
 				in := m.Type.In(i)
 
 				name, pkg := nameAndPackage(in)
@@ -137,7 +138,7 @@ func (c *Inspector) MethodsFromTypes(include []reflect.Type, exclude []reflect.T
 			numOut := m.Type.NumOut()
 
 			if numOut > 0 {
-				for i := 0; i < numOut; i++ {
+				for i := range numOut {
 					out := m.Type.Out(i)
 					name, pkg := nameAndPackage(out)
 
@@ -304,7 +305,7 @@ func (m Method) inOutStr() string {
 	}
 
 	args := make([]string, len(m.In))
-	for i := 0; i < len(args); i++ {
+	for i := range args {
 		args[i] = fmt.Sprintf("arg%d", i)
 	}
 	return "(" + strings.Join(args, ", ") + ")"
@@ -316,7 +317,7 @@ func (m Method) inStr() string {
 	}
 
 	args := make([]string, len(m.In))
-	for i := 0; i < len(args); i++ {
+	for i := range args {
 		args[i] = fmt.Sprintf("arg%d %s", i, m.In[i])
 	}
 	return "(" + strings.Join(args, ", ") + ")"
@@ -339,7 +340,7 @@ func (m Method) outStrNamed() string {
 	}
 
 	outs := make([]string, len(m.Out))
-	for i := 0; i < len(outs); i++ {
+	for i := range outs {
 		outs[i] = fmt.Sprintf("o%d %s", i, m.Out[i])
 	}
 
@@ -435,7 +436,7 @@ func (m Methods) ToMarshalJSON(receiver, pkgPath string, excludes ...string) (st
 		// Exclude self
 		for i, pkgImp := range pkgImports {
 			if pkgImp == pkgPath {
-				pkgImports = append(pkgImports[:i], pkgImports[i+1:]...)
+				pkgImports = slices.Delete(pkgImports, i, i+1)
 			}
 		}
 	}

commands/commandeer.go

@@ -39,9 +39,9 @@ import (
 
 	"github.com/gohugoio/hugo/common/hstrings"
 	"github.com/gohugoio/hugo/common/htime"
-	"github.com/gohugoio/hugo/common/hugo"
 	"github.com/gohugoio/hugo/common/loggers"
 	"github.com/gohugoio/hugo/common/paths"
+	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/config/allconfig"
 	"github.com/gohugoio/hugo/deps"
@@ -66,6 +66,12 @@ func Execute(args []string) error {
 	}
 	args = mapLegacyArgs(args)
 	cd, err := x.Execute(context.Background(), args)
+	if cd != nil {
+		if closer, ok := cd.Root.Command.(types.Closer); ok {
+			closer.Close()
+		}
+	}
+
 	if err != nil {
 		if err == errHelp {
 			cd.CobraCommand.Help()
@@ -88,11 +94,17 @@ type commonConfig struct {
 	fs      *hugofs.Fs
 }
 
+type configKey struct {
+	counter                    int32
+	ignoreModulesDoesNotExists bool
+}
+
 // This is the root command.
 type rootCommand struct {
-	Printf  func(format string, v ...interface{})
+	Printf  func(format string, v ...any)
-	Println func(a ...interface{})
+	Println func(a ...any)
-	Out     io.Writer
+	StdOut  io.Writer
+	StdErr  io.Writer
 
 	logger loggers.Logger
 
@@ -101,8 +113,8 @@ type rootCommand struct {
 
 	// Some, but not all commands need access to these.
 	// Some needs more than one, so keep them in a small cache.
-	commonConfigs *lazycache.Cache[int32, *commonConfig]
+	commonConfigs *lazycache.Cache[configKey, *commonConfig]
-	hugoSites     *lazycache.Cache[int32, *hugolib.HugoSites]
+	hugoSites     *lazycache.Cache[configKey, *hugolib.HugoSites]
 
 	// changesFromBuild received from Hugo in watch mode.
 	changesFromBuild chan []identity.Identity
@@ -129,8 +141,6 @@ type rootCommand struct {
 
 	logLevel string
 
-	verbose bool
-	debug   bool
 	quiet   bool
 	devMode bool // Hidden flag.
 
@@ -144,6 +154,18 @@ func (r *rootCommand) isVerbose() bool {
 	return r.logger.Level() <= logg.LevelInfo
 }
 
+func (r *rootCommand) Close() error {
+	if r.hugoSites != nil {
+		r.hugoSites.DeleteFunc(func(key configKey, value *hugolib.HugoSites) bool {
+			if value != nil {
+				value.Close()
+			}
+			return false
+		})
+	}
+	return nil
+}
+
 func (r *rootCommand) Build(cd *simplecobra.Commandeer, bcfg hugolib.BuildCfg, cfg config.Provider) (*hugolib.HugoSites, error) {
 	h, err := r.Hugo(cfg)
 	if err != nil {
@@ -160,17 +182,18 @@ func (r *rootCommand) Commands() []simplecobra.Commander {
 	return r.commands
 }
 
-func (r *rootCommand) ConfigFromConfig(key int32, oldConf *commonConfig) (*commonConfig, error) {
+func (r *rootCommand) ConfigFromConfig(key configKey, oldConf *commonConfig) (*commonConfig, error) {
-	cc, _, err := r.commonConfigs.GetOrCreate(key, func(key int32) (*commonConfig, error) {
+	cc, _, err := r.commonConfigs.GetOrCreate(key, func(key configKey) (*commonConfig, error) {
 		fs := oldConf.fs
 		configs, err := allconfig.LoadConfig(
 			allconfig.ConfigSourceDescriptor{
-				Flags:       oldConf.cfg,
+				Flags:                    oldConf.cfg,
-				Fs:          fs.Source,
+				Fs:                       fs.Source,
-				Filename:    r.cfgFile,
+				Filename:                 r.cfgFile,
-				ConfigDir:   r.cfgDir,
+				ConfigDir:                r.cfgDir,
-				Logger:      r.logger,
+				Logger:                   r.logger,
-				Environment: r.environment,
+				Environment:              r.environment,
+				IgnoreModuleDoesNotExist: key.ignoreModulesDoesNotExists,
 			},
 		)
 		if err != nil {
@@ -193,11 +216,11 @@ func (r *rootCommand) ConfigFromConfig(key int32, oldConf *commonConfig) (*commo
 	return cc, err
 }
 
-func (r *rootCommand) ConfigFromProvider(key int32, cfg config.Provider) (*commonConfig, error) {
+func (r *rootCommand) ConfigFromProvider(key configKey, cfg config.Provider) (*commonConfig, error) {
 	if cfg == nil {
 		panic("cfg must be set")
 	}
-	cc, _, err := r.commonConfigs.GetOrCreate(key, func(key int32) (*commonConfig, error) {
+	cc, _, err := r.commonConfigs.GetOrCreate(key, func(key configKey) (*commonConfig, error) {
 		var dir string
 		if r.source != "" {
 			dir, _ = filepath.Abs(r.source)
@@ -220,12 +243,13 @@ func (r *rootCommand) ConfigFromProvider(key int32, cfg config.Provider) (*commo
 		// Load the config first to allow publishDir to be configured in config file.
 		configs, err := allconfig.LoadConfig(
 			allconfig.ConfigSourceDescriptor{
-				Flags:       cfg,
+				Flags:                    cfg,
-				Fs:          hugofs.Os,
+				Fs:                       hugofs.Os,
-				Filename:    r.cfgFile,
+				Filename:                 r.cfgFile,
-				ConfigDir:   r.cfgDir,
+				ConfigDir:                r.cfgDir,
-				Environment: r.environment,
+				Environment:              r.environment,
-				Logger:      r.logger,
+				Logger:                   r.logger,
+				IgnoreModuleDoesNotExist: key.ignoreModulesDoesNotExists,
 			},
 		)
 		if err != nil {
@@ -307,7 +331,8 @@ func (r *rootCommand) ConfigFromProvider(key int32, cfg config.Provider) (*commo
 }
 
 func (r *rootCommand) HugFromConfig(conf *commonConfig) (*hugolib.HugoSites, error) {
-	h, _, err := r.hugoSites.GetOrCreate(r.configVersionID.Load(), func(key int32) (*hugolib.HugoSites, error) {
+	k := configKey{counter: r.configVersionID.Load()}
+	h, _, err := r.hugoSites.GetOrCreate(k, func(key configKey) (*hugolib.HugoSites, error) {
 		depsCfg := r.newDepsConfig(conf)
 		return hugolib.NewHugoSites(depsCfg)
 	})
@@ -315,7 +340,12 @@ func (r *rootCommand) HugFromConfig(conf *commonConfig) (*hugolib.HugoSites, err
 }
 
 func (r *rootCommand) Hugo(cfg config.Provider) (*hugolib.HugoSites, error) {
-	h, _, err := r.hugoSites.GetOrCreate(r.configVersionID.Load(), func(key int32) (*hugolib.HugoSites, error) {
+	return r.getOrCreateHugo(cfg, false)
+}
+
+func (r *rootCommand) getOrCreateHugo(cfg config.Provider, ignoreModuleDoesNotExist bool) (*hugolib.HugoSites, error) {
+	k := configKey{counter: r.configVersionID.Load(), ignoreModulesDoesNotExists: ignoreModuleDoesNotExist}
+	h, _, err := r.hugoSites.GetOrCreate(k, func(key configKey) (*hugolib.HugoSites, error) {
 		conf, err := r.ConfigFromProvider(key, cfg)
 		if err != nil {
 			return nil, err
@@ -327,7 +357,7 @@ func (r *rootCommand) Hugo(cfg config.Provider) (*hugolib.HugoSites, error) {
 }
 
 func (r *rootCommand) newDepsConfig(conf *commonConfig) deps.DepsCfg {
-	return deps.DepsCfg{Configs: conf.configs, Fs: conf.fs, LogOut: r.logger.Out(), LogLevel: r.logger.Level(), ChangesFromBuild: r.changesFromBuild}
+	return deps.DepsCfg{Configs: conf.configs, Fs: conf.fs, StdOut: r.logger.StdOut(), StdErr: r.logger.StdErr(), LogLevel: r.logger.Level(), ChangesFromBuild: r.changesFromBuild}
 }
 
 func (r *rootCommand) Name() string {
@@ -392,21 +422,23 @@ func (r *rootCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args
 }
 
 func (r *rootCommand) PreRun(cd, runner *simplecobra.Commandeer) error {
-	r.Out = os.Stdout
+	r.StdOut = os.Stdout
+	r.StdErr = os.Stderr
 	if r.quiet {
-		r.Out = io.Discard
+		r.StdOut = io.Discard
+		r.StdErr = io.Discard
 	}
 	// Used by mkcert (server).
-	log.SetOutput(r.Out)
+	log.SetOutput(r.StdOut)
 
-	r.Printf = func(format string, v ...interface{}) {
+	r.Printf = func(format string, v ...any) {
 		if !r.quiet {
-			fmt.Fprintf(r.Out, format, v...)
+			fmt.Fprintf(r.StdOut, format, v...)
 		}
 	}
-	r.Println = func(a ...interface{}) {
+	r.Println = func(a ...any) {
 		if !r.quiet {
-			fmt.Fprintln(r.Out, a...)
+			fmt.Fprintln(r.StdOut, a...)
 		}
 	}
 	_, running := runner.Command.(*serverCommand)
@@ -415,14 +447,16 @@ func (r *rootCommand) PreRun(cd, runner *simplecobra.Commandeer) error {
 	if err != nil {
 		return err
 	}
+	// Set up the global logger early to allow info deprecations during config load.
+	loggers.SetGlobalLogger(r.logger)
 
 	r.changesFromBuild = make(chan []identity.Identity, 10)
 
-	r.commonConfigs = lazycache.New(lazycache.Options[int32, *commonConfig]{MaxEntries: 5})
+	r.commonConfigs = lazycache.New(lazycache.Options[configKey, *commonConfig]{MaxEntries: 5})
 	// We don't want to keep stale HugoSites in memory longer than needed.
-	r.hugoSites = lazycache.New(lazycache.Options[int32, *hugolib.HugoSites]{
+	r.hugoSites = lazycache.New(lazycache.Options[configKey, *hugolib.HugoSites]{
 		MaxEntries: 1,
-		OnEvict: func(key int32, value *hugolib.HugoSites) {
+		OnEvict: func(key configKey, value *hugolib.HugoSites) {
 			value.Close()
 			runtime.GC()
 		},
@@ -450,32 +484,21 @@ func (r *rootCommand) createLogger(running bool) (loggers.Logger, error) {
 			default:
 				return nil, fmt.Errorf("invalid log level: %q, must be one of debug, warn, info or error", r.logLevel)
 			}
-		} else {
-			if r.verbose {
-				hugo.Deprecate("--verbose", "use --logLevel info", "v0.114.0")
-				hugo.Deprecate("--verbose", "use --logLevel info", "v0.114.0")
-				level = logg.LevelInfo
-			}
-
-			if r.debug {
-				hugo.Deprecate("--debug", "use --logLevel debug", "v0.114.0")
-				level = logg.LevelDebug
-			}
 		}
 	}
 
 	optsLogger := loggers.Options{
 		DistinctLevel: logg.LevelWarn,
 		Level:         level,
-		Stdout:        r.Out,
+		StdOut:        r.StdOut,
-		Stderr:        r.Out,
+		StdErr:        r.StdErr,
 		StoreErrors:   running,
 	}
 
 	return loggers.New(optsLogger), nil
 }
 
-func (r *rootCommand) Reset() {
+func (r *rootCommand) resetLogs() {
 	r.logger.Reset()
 	loggers.Log().Reset()
 }
@@ -486,16 +509,26 @@ func (r *rootCommand) IsTestRun() bool {
 }
 
 func (r *rootCommand) Init(cd *simplecobra.Commandeer) error {
+	return r.initRootCommand("", cd)
+}
+
+func (r *rootCommand) initRootCommand(subCommandName string, cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Use = "hugo [flags]"
+	commandName := "hugo"
-	cmd.Short = "hugo builds your site"
+	if subCommandName != "" {
-	cmd.Long = `hugo is the main command, used to build your Hugo site.
+		commandName = subCommandName
+	}
+	cmd.Use = fmt.Sprintf("%s [flags]", commandName)
+	cmd.Short = "Build your site"
+	cmd.Long = `COMMAND_NAME is the main command, used to build your Hugo site.
 
 Hugo is a Fast and Flexible Static Site Generator
 built with love by spf13 and friends in Go.
 
 Complete documentation is available at https://gohugo.io/.`
 
+	cmd.Long = strings.ReplaceAll(cmd.Long, "COMMAND_NAME", commandName)
+
 	// Configure persistent flags
 	cmd.PersistentFlags().StringVarP(&r.source, "source", "s", "", "filesystem path to read files relative from")
 	_ = cmd.MarkFlagDirname("source")
@@ -507,6 +540,7 @@ Complete documentation is available at https://gohugo.io/.`
 	cmd.PersistentFlags().StringP("themesDir", "", "", "filesystem path to themes directory")
 	_ = cmd.MarkFlagDirname("themesDir")
 	cmd.PersistentFlags().StringP("ignoreVendorPaths", "", "", "ignores any _vendor for module paths matching the given Glob pattern")
+	cmd.PersistentFlags().BoolP("noBuildLock", "", false, "don't create .hugo_build.lock file")
 	_ = cmd.RegisterFlagCompletionFunc("ignoreVendorPaths", cobra.NoFileCompletions)
 	cmd.PersistentFlags().String("clock", "", "set the clock used by Hugo, e.g. --clock 2021-11-06T22:30:00.00+09:00")
 	_ = cmd.RegisterFlagCompletionFunc("clock", cobra.NoFileCompletions)
@@ -518,8 +552,6 @@ Complete documentation is available at https://gohugo.io/.`
 	cmd.PersistentFlags().BoolVar(&r.quiet, "quiet", false, "build in quiet mode")
 	cmd.PersistentFlags().BoolVarP(&r.renderToMemory, "renderToMemory", "M", false, "render to memory (mostly useful when running the server)")
 
-	cmd.PersistentFlags().BoolVarP(&r.verbose, "verbose", "v", false, "verbose output")
-	cmd.PersistentFlags().BoolVarP(&r.debug, "debug", "", false, "debug output")
 	cmd.PersistentFlags().BoolVarP(&r.devMode, "devMode", "", false, "only used for internal testing, flag hidden.")
 	cmd.PersistentFlags().StringVar(&r.logLevel, "logLevel", "", "log level (debug|info|warn|error)")
 	_ = cmd.RegisterFlagCompletionFunc("logLevel", cobra.FixedCompletions([]string{"debug", "info", "warn", "error"}, cobra.ShellCompDirectiveNoFileComp))
@@ -564,7 +596,6 @@ func applyLocalFlagsBuild(cmd *cobra.Command, r *rootCommand) {
 	cmd.Flags().BoolVar(&r.forceSyncStatic, "forceSyncStatic", false, "copy all files when static is changed.")
 	cmd.Flags().BoolP("noTimes", "", false, "don't sync modification time of files")
 	cmd.Flags().BoolP("noChmod", "", false, "don't sync permission mode of files")
-	cmd.Flags().BoolP("noBuildLock", "", false, "don't create .hugo_build.lock file")
 	cmd.Flags().BoolP("printI18nWarnings", "", false, "print missing translations")
 	cmd.Flags().BoolP("printPathWarnings", "", false, "print warnings on duplicate target paths etc.")
 	cmd.Flags().BoolP("printUnusedTemplates", "", false, "print warnings on unused templates.")

commands/commands.go

@@ -14,6 +14,8 @@
 package commands
 
 import (
+	"context"
+
 	"github.com/bep/simplecobra"
 )
 
@@ -21,6 +23,7 @@ import (
 func newExec() (*simplecobra.Exec, error) {
 	rootCmd := &rootCommand{
 		commands: []simplecobra.Commander{
+			newHugoBuildCmd(),
 			newVersionCmd(),
 			newEnvCommand(),
 			newServerCommand(),
@@ -38,3 +41,33 @@ func newExec() (*simplecobra.Exec, error) {
 
 	return simplecobra.New(rootCmd)
 }
+
+func newHugoBuildCmd() simplecobra.Commander {
+	return &hugoBuildCommand{}
+}
+
+// hugoBuildCommand just delegates to the rootCommand.
+type hugoBuildCommand struct {
+	rootCmd *rootCommand
+}
+
+func (c *hugoBuildCommand) Commands() []simplecobra.Commander {
+	return nil
+}
+
+func (c *hugoBuildCommand) Name() string {
+	return "build"
+}
+
+func (c *hugoBuildCommand) Init(cd *simplecobra.Commandeer) error {
+	c.rootCmd = cd.Root.Command.(*rootCommand)
+	return c.rootCmd.initRootCommand("build", cd)
+}
+
+func (c *hugoBuildCommand) PreRun(cd, runner *simplecobra.Commandeer) error {
+	return c.rootCmd.PreRun(cd, runner)
+}
+
+func (c *hugoBuildCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args []string) error {
+	return c.rootCmd.Run(ctx, cd, args)
+}

commands/config.go

@@ -43,8 +43,9 @@ func newConfigCommand() *configCommand {
 type configCommand struct {
 	r *rootCommand
 
-	format string
+	format    string
-	lang   string
+	lang      string
+	printZero bool
 
 	commands []simplecobra.Commander
 }
@@ -58,7 +59,7 @@ func (c *configCommand) Name() string {
 }
 
 func (c *configCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args []string) error {
-	conf, err := c.r.ConfigFromProvider(c.r.configVersionID.Load(), flagsToCfg(cd, nil))
+	conf, err := c.r.ConfigFromProvider(configKey{counter: c.r.configVersionID.Load()}, flagsToCfg(cd, nil))
 	if err != nil {
 		return err
 	}
@@ -78,7 +79,7 @@ func (c *configCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, arg
 	dec.SetIndent("", "  ")
 	dec.SetEscapeHTML(false)
 
-	if err := dec.Encode(parser.ReplacingJSONMarshaller{Value: config, KeysToLower: true, OmitEmpty: true}); err != nil {
+	if err := dec.Encode(parser.ReplacingJSONMarshaller{Value: config, KeysToLower: true, OmitEmpty: !c.printZero}); err != nil {
 		return err
 	}
 
@@ -89,7 +90,7 @@ func (c *configCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, arg
 		os.Stdout.Write(buf.Bytes())
 	default:
 		// Decode the JSON to a map[string]interface{} and then unmarshal it again to the correct format.
-		var m map[string]interface{}
+		var m map[string]any
 		if err := json.Unmarshal(buf.Bytes(), &m); err != nil {
 			return err
 		}
@@ -110,11 +111,12 @@ func (c *configCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, arg
 func (c *configCommand) Init(cd *simplecobra.Commandeer) error {
 	c.r = cd.Root.Command.(*rootCommand)
 	cmd := cd.CobraCommand
-	cmd.Short = "Print the site configuration"
+	cmd.Short = "Display site configuration"
-	cmd.Long = `Print the site configuration, both default and custom settings.`
+	cmd.Long = `Display site configuration, both default and custom settings.`
 	cmd.Flags().StringVar(&c.format, "format", "toml", "preferred file format (toml, yaml or json)")
 	_ = cmd.RegisterFlagCompletionFunc("format", cobra.FixedCompletions([]string{"toml", "yaml", "json"}, cobra.ShellCompDirectiveNoFileComp))
 	cmd.Flags().StringVar(&c.lang, "lang", "", "the language to display config for. Defaults to the first language defined.")
+	cmd.Flags().BoolVar(&c.printZero, "printZero", false, `include config options with zero values (e.g. false, 0, "") in the output`)
 	_ = cmd.RegisterFlagCompletionFunc("lang", cobra.NoFileCompletions)
 	applyLocalFlagsBuildConfig(cmd, c.r)
 
@@ -209,7 +211,7 @@ func (c *configMountsCommand) Name() string {
 
 func (c *configMountsCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args []string) error {
 	r := c.configCmd.r
-	conf, err := r.ConfigFromProvider(r.configVersionID.Load(), flagsToCfg(cd, nil))
+	conf, err := r.ConfigFromProvider(configKey{counter: c.r.configVersionID.Load()}, flagsToCfg(cd, nil))
 	if err != nil {
 		return err
 	}

commands/convert.go

@@ -105,8 +105,8 @@ func (c *convertCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, ar
 
 func (c *convertCommand) Init(cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Short = "Convert your content to different formats"
+	cmd.Short = "Convert front matter to another format"
-	cmd.Long = `Convert your content (e.g. front matter) to different formats.
+	cmd.Long = `Convert front matter to another format.
 
 See convert's subcommands toJSON, toTOML and toYAML for more information.`
 

commands/deploy.go

@@ -11,21 +11,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build !nodeploy
+//go:build withdeploy
-// +build !nodeploy
-
-// Copyright 2024 The Hugo Authors. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
 
 package commands
 
@@ -33,7 +19,6 @@ import (
 	"context"
 
 	"github.com/gohugoio/hugo/deploy"
-	"github.com/gohugoio/hugo/deploy/deployconfig"
 
 	"github.com/bep/simplecobra"
 	"github.com/spf13/cobra"
@@ -42,8 +27,8 @@ import (
 func newDeployCommand() simplecobra.Commander {
 	return &simpleCommand{
 		name:  "deploy",
-		short: "Deploy your site to a Cloud provider.",
+		short: "Deploy your site to a cloud provider",
-		long: `Deploy your site to a Cloud provider.
+		long: `Deploy your site to a cloud provider
 
 See https://gohugo.io/hosting-and-deployment/hugo-deploy/ for detailed
 documentation.
@@ -60,17 +45,7 @@ documentation.
 			return deployer.Deploy(ctx)
 		},
 		withc: func(cmd *cobra.Command, r *rootCommand) {
-			cmd.ValidArgsFunction = cobra.NoFileCompletions
+			applyDeployFlags(cmd, r)
-			cmd.Flags().String("target", "", "target deployment from deployments section in config file; defaults to the first one")
-			_ = cmd.RegisterFlagCompletionFunc("target", cobra.NoFileCompletions)
-			cmd.Flags().Bool("confirm", false, "ask for confirmation before making changes to the target")
-			cmd.Flags().Bool("dryRun", false, "dry run")
-			cmd.Flags().Bool("force", false, "force upload of all files")
-			cmd.Flags().Bool("invalidateCDN", deployconfig.DefaultConfig.InvalidateCDN, "invalidate the CDN cache listed in the deployment target")
-			cmd.Flags().Int("maxDeletes", deployconfig.DefaultConfig.MaxDeletes, "maximum # of files to delete, or -1 to disable")
-			_ = cmd.RegisterFlagCompletionFunc("maxDeletes", cobra.NoFileCompletions)
-			cmd.Flags().Int("workers", deployconfig.DefaultConfig.Workers, "number of workers to transfer files. defaults to 10")
-			_ = cmd.RegisterFlagCompletionFunc("workers", cobra.NoFileCompletions)
 		},
 	}
 }

commands/deploy_flags.go

@@ -0,0 +1,33 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package commands
+
+import (
+	"github.com/gohugoio/hugo/deploy/deployconfig"
+	"github.com/spf13/cobra"
+)
+
+func applyDeployFlags(cmd *cobra.Command, r *rootCommand) {
+	cmd.ValidArgsFunction = cobra.NoFileCompletions
+	cmd.Flags().String("target", "", "target deployment from deployments section in config file; defaults to the first one")
+	_ = cmd.RegisterFlagCompletionFunc("target", cobra.NoFileCompletions)
+	cmd.Flags().Bool("confirm", false, "ask for confirmation before making changes to the target")
+	cmd.Flags().Bool("dryRun", false, "dry run")
+	cmd.Flags().Bool("force", false, "force upload of all files")
+	cmd.Flags().Bool("invalidateCDN", deployconfig.DefaultConfig.InvalidateCDN, "invalidate the CDN cache listed in the deployment target")
+	cmd.Flags().Int("maxDeletes", deployconfig.DefaultConfig.MaxDeletes, "maximum # of files to delete, or -1 to disable")
+	_ = cmd.RegisterFlagCompletionFunc("maxDeletes", cobra.NoFileCompletions)
+	cmd.Flags().Int("workers", deployconfig.DefaultConfig.Workers, "number of workers to transfer files. defaults to 10")
+	_ = cmd.RegisterFlagCompletionFunc("workers", cobra.NoFileCompletions)
+}

commands/deploy_off.go

@@ -11,8 +11,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:build nodeploy
+//go:build !withdeploy
-// +build nodeploy
 
 // Copyright 2024 The Hugo Authors. All rights reserved.
 //
@@ -31,6 +30,7 @@ package commands
 
 import (
 	"context"
+	"errors"
 
 	"github.com/bep/simplecobra"
 	"github.com/spf13/cobra"
@@ -40,9 +40,10 @@ func newDeployCommand() simplecobra.Commander {
 	return &simpleCommand{
 		name: "deploy",
 		run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
-			return nil
+			return errors.New("deploy not supported in this version of Hugo; install a release with 'withdeploy' in the archive filename or build yourself with the 'withdeploy' build tag. Also see https://github.com/gohugoio/hugo/pull/12995")
 		},
 		withc: func(cmd *cobra.Command, r *rootCommand) {
+			applyDeployFlags(cmd, r)
 			cmd.Hidden = true
 		},
 	}

commands/env.go

@@ -25,8 +25,8 @@ import (
 func newEnvCommand() simplecobra.Commander {
 	return &simpleCommand{
 		name:  "env",
-		short: "Print Hugo version and environment info",
+		short: "Display version and environment info",
-		long:  "Print Hugo version and environment info. This is useful in Hugo bug reports",
+		long:  "Display version and environment info. This is useful in Hugo bug reports",
 		run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 			r.Printf("%s\n", hugo.BuildVersionString())
 			r.Printf("GOOS=%q\n", runtime.GOOS)
@@ -61,8 +61,8 @@ func newVersionCmd() simplecobra.Commander {
 			r.Println(hugo.BuildVersionString())
 			return nil
 		},
-		short: "Print Hugo version and environment info",
+		short: "Display version",
-		long:  "Print Hugo version and environment info. This is useful in Hugo bug reports.",
+		long:  "Display version and environment info. This is useful in Hugo bug reports.",
 		withc: func(cmd *cobra.Command, r *rootCommand) {
 			cmd.ValidArgsFunction = cobra.NoFileCompletions
 		},

commands/gen.go

@@ -21,6 +21,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"slices"
 	"strings"
 
 	"github.com/alecthomas/chroma/v2"
@@ -49,6 +50,7 @@ func newGenCommand() *genCommand {
 		highlightStyle         string
 		lineNumbersInlineStyle string
 		lineNumbersTableStyle  string
+		omitEmpty              bool
 	)
 
 	newChromaStyles := func() simplecobra.Commander {
@@ -60,6 +62,10 @@ func newGenCommand() *genCommand {
 See https://xyproto.github.io/splash/docs/all.html for a preview of the available styles`,
 
 			run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
+				style = strings.ToLower(style)
+				if !slices.Contains(styles.Names(), style) {
+					return fmt.Errorf("invalid style: %s", style)
+				}
 				builder := styles.Get(style).Builder()
 				if highlightStyle != "" {
 					builder.Add(chroma.LineHighlight, highlightStyle)
@@ -74,8 +80,17 @@ See https://xyproto.github.io/splash/docs/all.html for a preview of the availabl
 				if err != nil {
 					return err
 				}
-				formatter := html.New(html.WithAllClasses(true))
+
-				formatter.WriteCSS(os.Stdout, style)
+				var formatter *html.Formatter
+				if omitEmpty {
+					formatter = html.New(html.WithClasses(true))
+				} else {
+					formatter = html.New(html.WithAllClasses(true))
+				}
+
+				w := os.Stdout
+				fmt.Fprintf(w, "/* Generated using: hugo %s */\n\n", strings.Join(os.Args[1:], " "))
+				formatter.WriteCSS(w, style)
 				return nil
 			},
 			withc: func(cmd *cobra.Command, r *rootCommand) {
@@ -88,6 +103,8 @@ See https://xyproto.github.io/splash/docs/all.html for a preview of the availabl
 				_ = cmd.RegisterFlagCompletionFunc("lineNumbersInlineStyle", cobra.NoFileCompletions)
 				cmd.PersistentFlags().StringVar(&lineNumbersTableStyle, "lineNumbersTableStyle", "", `foreground and background colors for table line numbers, e.g. --lineNumbersTableStyle "#fff000 bg:#000fff"`)
 				_ = cmd.RegisterFlagCompletionFunc("lineNumbersTableStyle", cobra.NoFileCompletions)
+				cmd.PersistentFlags().BoolVar(&omitEmpty, "omitEmpty", false, `omit empty CSS rules`)
+				_ = cmd.RegisterFlagCompletionFunc("omitEmpty", cobra.NoFileCompletions)
 			},
 		}
 	}
@@ -142,7 +159,7 @@ url: %s
 
 		return &simpleCommand{
 			name:  "doc",
-			short: "Generate Markdown documentation for the Hugo CLI.",
+			short: "Generate Markdown documentation for the Hugo CLI",
 			long: `Generate Markdown documentation for the Hugo CLI.
 			This command is, mostly, used to create up-to-date documentation
 	of Hugo's command-line interface for https://gohugo.io/.
@@ -167,13 +184,13 @@ url: %s
 				prepender := func(filename string) string {
 					name := filepath.Base(filename)
 					base := strings.TrimSuffix(name, path.Ext(name))
-					url := "/commands/" + strings.ToLower(base) + "/"
+					url := "/docs/reference/commands/" + strings.ToLower(base) + "/"
 					return fmt.Sprintf(gendocFrontmatterTemplate, strings.Replace(base, "_", " ", -1), base, url)
 				}
 
 				linkHandler := func(name string) string {
 					base := strings.TrimSuffix(name, path.Ext(name))
-					return "/commands/" + strings.ToLower(base) + "/"
+					return "/docs/reference/commands/" + strings.ToLower(base) + "/"
 				}
 				r.Println("Generating Hugo command-line documentation in", gendocdir, "...")
 				doc.GenMarkdownTreeCustom(cd.CobraCommand.Root(), gendocdir, prepender, linkHandler)
@@ -194,7 +211,7 @@ url: %s
 	newDocsHelper := func() simplecobra.Commander {
 		return &simpleCommand{
 			name:  "docshelper",
-			short: "Generate some data files for the Hugo docs.",
+			short: "Generate some data files for the Hugo docs",
 
 			run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 				r.Println("Generate docs data to", docsHelperTarget)
@@ -215,7 +232,7 @@ url: %s
 				}
 
 				// Decode the JSON to a map[string]interface{} and then unmarshal it again to the correct format.
-				var m map[string]interface{}
+				var m map[string]any
 				if err := json.Unmarshal(buf.Bytes(), &m); err != nil {
 					return err
 				}
@@ -273,7 +290,8 @@ func (c *genCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args [
 
 func (c *genCommand) Init(cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Short = "A collection of several useful generators."
+	cmd.Short = "Generate documentation and syntax highlighting styles"
+	cmd.Long = "Generate documentation for your project using Hugo's documentation engine, including syntax highlighting for various programming languages."
 
 	cmd.RunE = nil
 	return nil

commands/hugobuilder.go

@@ -27,7 +27,6 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/bep/logg"
 	"github.com/bep/simplecobra"
 	"github.com/fsnotify/fsnotify"
 	"github.com/gohugoio/hugo/common/herrors"
@@ -63,7 +62,7 @@ type hugoBuilder struct {
 
 	// Currently only set when in "fast render mode".
 	changeDetector *fileChangeDetector
-	visitedURLs    *types.EvictingStringQueue
+	visitedURLs    *types.EvictingQueue[string]
 
 	fullRebuildSem *semaphore.Weighted
 	debounce       func(f func())
@@ -136,10 +135,6 @@ func (e *hugoBuilderErrState) wasErr() bool {
 	return e.waserr
 }
 
-func (c *hugoBuilder) errCount() int {
-	return c.r.logger.LoggCount(logg.LevelError) + loggers.Log().LoggCount(logg.LevelError)
-}
-
 // getDirList provides NewWatcher() with a list of directories to watch for changes.
 func (c *hugoBuilder) getDirList() ([]string, error) {
 	h, err := c.hugo()
@@ -345,7 +340,6 @@ func (c *hugoBuilder) newWatcher(pollIntervalStr string, dirList ...string) (*wa
 		for {
 			select {
 			case changes := <-c.r.changesFromBuild:
-				c.errState.setBuildErr(nil)
 				unlock, err := h.LockBuild()
 				if err != nil {
 					c.r.logger.Errorln("Failed to acquire a build lock: %s", err)
@@ -358,7 +352,7 @@ func (c *hugoBuilder) newWatcher(pollIntervalStr string, dirList ...string) (*wa
 				}
 				if c.s != nil && c.s.doLiveReload {
 					doReload := c.changeDetector == nil || len(c.changeDetector.changed()) > 0
-					doReload = doReload || c.showErrorInBrowser && c.errCount() > 0
+					doReload = doReload || c.showErrorInBrowser && c.errState.buildErr() != nil
 					if doReload {
 						livereload.ForceRefresh()
 					}
@@ -372,7 +366,7 @@ func (c *hugoBuilder) newWatcher(pollIntervalStr string, dirList ...string) (*wa
 					return
 				}
 				c.handleEvents(watcher, staticSyncer, evs, configSet)
-				if c.showErrorInBrowser && c.errCount() > 0 {
+				if c.showErrorInBrowser && c.errState.buildErr() != nil {
 					// Need to reload browser to show the error
 					livereload.ForceRefresh()
 				}
@@ -419,11 +413,17 @@ func (c *hugoBuilder) build() error {
 }
 
 func (c *hugoBuilder) buildSites(noBuildLock bool) (err error) {
-	h, err := c.hugo()
+	defer func() {
+		c.errState.setBuildErr(err)
+	}()
+
+	var h *hugolib.HugoSites
+	h, err = c.hugo()
 	if err != nil {
-		return err
+		return
 	}
-	return h.Build(hugolib.BuildCfg{NoBuildLock: noBuildLock})
+	err = h.Build(hugolib.BuildCfg{NoBuildLock: noBuildLock})
+	return
 }
 
 func (c *hugoBuilder) copyStatic() (map[string]uint64, error) {
@@ -619,6 +619,9 @@ func (c *hugoBuilder) fullRebuild(changeType string) {
 			// Set the processing on pause until the state is recovered.
 			c.errState.setPaused(true)
 			c.handleBuildErr(err, "Failed to reload config")
+			if c.s.doLiveReload {
+				livereload.ForceRefresh()
+			}
 		} else {
 			c.errState.setPaused(false)
 		}
@@ -660,7 +663,20 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 	var n int
 	for _, ev := range evs {
 		keep := true
-		if ev.Has(fsnotify.Create) || ev.Has(fsnotify.Write) {
+		// Write and rename operations are often followed by CHMOD.
+		// There may be valid use cases for rebuilding the site on CHMOD,
+		// but that will require more complex logic than this simple conditional.
+		// On OS X this seems to be related to Spotlight, see:
+		// https://github.com/go-fsnotify/fsnotify/issues/15
+		// A workaround is to put your site(s) on the Spotlight exception list,
+		// but that may be a little mysterious for most end users.
+		// So, for now, we skip reload on CHMOD.
+		// We do have to check for WRITE though. On slower laptops a Chmod
+		// could be aggregated with other important events, and we still want
+		// to rebuild on those
+		if ev.Op == fsnotify.Chmod {
+			keep = false
+		} else if ev.Has(fsnotify.Create) || ev.Has(fsnotify.Write) {
 			if _, err := os.Stat(ev.Name); err != nil {
 				keep = false
 			}
@@ -779,6 +795,7 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 		istemp := strings.HasSuffix(ext, "~") ||
 			(ext == ".swp") || // vim
 			(ext == ".swx") || // vim
+			(ext == ".bck") || // helix
 			(ext == ".tmp") || // generic temp file
 			(ext == ".DS_Store") || // OSX Thumbnail
 			baseName == "4913" || // vim
@@ -801,21 +818,6 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 			continue
 		}
 
-		// Write and rename operations are often followed by CHMOD.
-		// There may be valid use cases for rebuilding the site on CHMOD,
-		// but that will require more complex logic than this simple conditional.
-		// On OS X this seems to be related to Spotlight, see:
-		// https://github.com/go-fsnotify/fsnotify/issues/15
-		// A workaround is to put your site(s) on the Spotlight exception list,
-		// but that may be a little mysterious for most end users.
-		// So, for now, we skip reload on CHMOD.
-		// We do have to check for WRITE though. On slower laptops a Chmod
-		// could be aggregated with other important events, and we still want
-		// to rebuild on those
-		if ev.Op&(fsnotify.Chmod|fsnotify.Write|fsnotify.Create) == fsnotify.Chmod {
-			continue
-		}
-
 		walkAdder := func(path string, f hugofs.FileMetaInfo) error {
 			if f.IsDir() {
 				c.r.logger.Println("adding created directory to watchlist", path)
@@ -916,7 +918,11 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 
 			changed := c.changeDetector.changed()
 			if c.changeDetector != nil {
-				lrl.Logf("build changed %d files", len(changed))
+				if len(changed) >= 10 {
+					lrl.Logf("build changed %d files", len(changed))
+				} else {
+					lrl.Logf("build changed %d files: %q", len(changed), changed)
+				}
 				if len(changed) == 0 {
 					// Nothing has changed.
 					return
@@ -962,10 +968,13 @@ func (c *hugoBuilder) handleEvents(watcher *watcher.Batcher,
 					pathToRefresh := h.PathSpec.RelURL(paths.ToSlashTrimLeading(otherChanges[0]), false)
 					lrl.Logf("refreshing %q", pathToRefresh)
 					livereload.RefreshPath(pathToRefresh)
-				} else if len(cssChanges) == 0 {
+				} else if len(cssChanges) == 0 || len(otherChanges) > 1 {
 					lrl.Logf("force refresh")
 					livereload.ForceRefresh()
 				}
+			} else {
+				lrl.Logf("force refresh")
+				livereload.ForceRefresh()
 			}
 
 			if len(cssChanges) > 0 {
@@ -1046,7 +1055,7 @@ func (c *hugoBuilder) loadConfig(cd *simplecobra.Commandeer, running bool) error
 		"fastRenderMode": c.fastRenderMode,
 	})
 
-	conf, err := c.r.ConfigFromProvider(c.r.configVersionID.Load(), flagsToCfg(cd, cfg))
+	conf, err := c.r.ConfigFromProvider(configKey{counter: c.r.configVersionID.Load()}, flagsToCfg(cd, cfg))
 	if err != nil {
 		return err
 	}
@@ -1080,42 +1089,49 @@ func (c *hugoBuilder) printChangeDetected(typ string) {
 	c.r.logger.Println(htime.Now().Format(layout))
 }
 
-func (c *hugoBuilder) rebuildSites(events []fsnotify.Event) error {
+func (c *hugoBuilder) rebuildSites(events []fsnotify.Event) (err error) {
+	defer func() {
+		c.errState.setBuildErr(err)
+	}()
 	if err := c.errState.buildErr(); err != nil {
 		ferrs := herrors.UnwrapFileErrorsWithErrorContext(err)
 		for _, err := range ferrs {
 			events = append(events, fsnotify.Event{Name: err.Position().Filename, Op: fsnotify.Write})
 		}
 	}
-	c.errState.setBuildErr(nil)
+	var h *hugolib.HugoSites
-	h, err := c.hugo()
+	h, err = c.hugo()
 	if err != nil {
-		return err
+		return
 	}
-
+	err = h.Build(hugolib.BuildCfg{NoBuildLock: true, RecentlyTouched: c.visitedURLs, ErrRecovery: c.errState.wasErr()}, events...)
-	return h.Build(hugolib.BuildCfg{NoBuildLock: true, RecentlyVisited: c.visitedURLs, ErrRecovery: c.errState.wasErr()}, events...)
+	return
 }
 
-func (c *hugoBuilder) rebuildSitesForChanges(ids []identity.Identity) error {
+func (c *hugoBuilder) rebuildSitesForChanges(ids []identity.Identity) (err error) {
-	c.errState.setBuildErr(nil)
+	defer func() {
-	h, err := c.hugo()
+		c.errState.setBuildErr(err)
+	}()
+
+	var h *hugolib.HugoSites
+	h, err = c.hugo()
 	if err != nil {
-		return err
+		return
 	}
 	whatChanged := &hugolib.WhatChanged{}
 	whatChanged.Add(ids...)
-	err = h.Build(hugolib.BuildCfg{NoBuildLock: true, WhatChanged: whatChanged, RecentlyVisited: c.visitedURLs, ErrRecovery: c.errState.wasErr()})
+	err = h.Build(hugolib.BuildCfg{NoBuildLock: true, WhatChanged: whatChanged, RecentlyTouched: c.visitedURLs, ErrRecovery: c.errState.wasErr()})
-	c.errState.setBuildErr(err)
+
-	return err
+	return
 }
 
 func (c *hugoBuilder) reloadConfig() error {
-	c.r.Reset()
+	c.r.resetLogs()
 	c.r.configVersionID.Add(1)
 
 	if err := c.withConfE(func(conf *commonConfig) error {
 		oldConf := conf
-		newConf, err := c.r.ConfigFromConfig(c.r.configVersionID.Load(), conf)
+		newConf, err := c.r.ConfigFromConfig(configKey{counter: c.r.configVersionID.Load()}, conf)
 		if err != nil {
 			return err
 		}

commands/import.go

@@ -90,8 +90,8 @@ func (c *importCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, arg
 
 func (c *importCommand) Init(cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Short = "Import your site from others."
+	cmd.Short = "Import a site from another system"
-	cmd.Long = `Import your site from other web site generators like Jekyll.
+	cmd.Long = `Import a site from another system.
 
 Import requires a subcommand, e.g. ` + "`hugo import jekyll jekyll_root_path target_path`."
 

commands/list.go

@@ -57,7 +57,7 @@ func newListCommand() *listCommand {
 			return err
 		}
 
-		writer := csv.NewWriter(r.Out)
+		writer := csv.NewWriter(r.StdOut)
 		defer writer.Flush()
 
 		writer.Write([]string{
@@ -199,8 +199,8 @@ func (c *listCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args
 
 func (c *listCommand) Init(cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Short = "Listing out various types of content"
+	cmd.Short = "List content"
-	cmd.Long = `Listing out various types of content.
+	cmd.Long = `List content.
 
 List requires a subcommand, e.g. hugo list drafts`
 

commands/mod.go

@@ -44,16 +44,16 @@ func newModCommands() *modCommands {
 
 	npmCommand := &simpleCommand{
 		name:  "npm",
-		short: "Various npm helpers.",
+		short: "Various npm helpers",
 		long:  `Various npm (Node package manager) helpers.`,
 		commands: []simplecobra.Commander{
 			&simpleCommand{
 				name:  "pack",
-				short: "Experimental: Prepares and writes a composite package.json file for your project.",
+				short: "Experimental: Prepares and writes a composite package.json file for your project",
 				long: `Prepares and writes a composite package.json file for your project.
 
 On first run it creates a "package.hugo.json" in the project root if not already there. This file will be used as a template file
-with the base dependency set. 
+with the base dependency set.
 
 This set will be merged with all "package.hugo.json" files found in the dependency tree, picking the version closest to the project.
 
@@ -80,12 +80,12 @@ so this may/will change in future versions of Hugo.
 		commands: []simplecobra.Commander{
 			&simpleCommand{
 				name:  "init",
-				short: "Initialize this project as a Hugo Module.",
+				short: "Initialize this project as a Hugo Module",
 				long: `Initialize this project as a Hugo Module.
 	It will try to guess the module path, but you may help by passing it as an argument, e.g:
-	
+
 		hugo mod init github.com/gohugoio/testshortcodes
-	
+
 	Note that Hugo Modules supports multi-module projects, so you can initialize a Hugo Module
 	inside a subfolder on GitHub, as one example.
 	`,
@@ -94,7 +94,7 @@ so this may/will change in future versions of Hugo.
 					applyLocalFlagsBuildConfig(cmd, r)
 				},
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
-					h, err := r.Hugo(flagsToCfg(cd, nil))
+					h, err := r.getOrCreateHugo(flagsToCfg(cd, nil), true)
 					if err != nil {
 						return err
 					}
@@ -102,12 +102,16 @@ so this may/will change in future versions of Hugo.
 					if len(args) >= 1 {
 						initPath = args[0]
 					}
-					return h.Configs.ModulesClient.Init(initPath)
+					c := h.Configs.ModulesClient
+					if err := c.Init(initPath); err != nil {
+						return err
+					}
+					return nil
 				},
 			},
 			&simpleCommand{
 				name:  "verify",
-				short: "Verify dependencies.",
+				short: "Verify dependencies",
 				long:  `Verify checks that the dependencies of the current module, which are stored in a local downloaded source cache, have not been modified since being downloaded.`,
 				withc: func(cmd *cobra.Command, r *rootCommand) {
 					cmd.ValidArgsFunction = cobra.NoFileCompletions
@@ -115,7 +119,7 @@ so this may/will change in future versions of Hugo.
 					cmd.Flags().BoolVarP(&clean, "clean", "", false, "delete module cache for dependencies that fail verification")
 				},
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
-					conf, err := r.ConfigFromProvider(r.configVersionID.Load(), flagsToCfg(cd, nil))
+					conf, err := r.ConfigFromProvider(configKey{counter: r.configVersionID.Load()}, flagsToCfg(cd, nil))
 					if err != nil {
 						return err
 					}
@@ -125,7 +129,7 @@ so this may/will change in future versions of Hugo.
 			},
 			&simpleCommand{
 				name:  "graph",
-				short: "Print a module dependency graph.",
+				short: "Print a module dependency graph",
 				long: `Print a module dependency graph with information about module status (disabled, vendored).
 Note that for vendored modules, that is the version listed and not the one from go.mod.
 `,
@@ -135,7 +139,7 @@ Note that for vendored modules, that is the version listed and not the one from
 					cmd.Flags().BoolVarP(&clean, "clean", "", false, "delete module cache for dependencies that fail verification")
 				},
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
-					conf, err := r.ConfigFromProvider(r.configVersionID.Load(), flagsToCfg(cd, nil))
+					conf, err := r.ConfigFromProvider(configKey{counter: r.configVersionID.Load()}, flagsToCfg(cd, nil))
 					if err != nil {
 						return err
 					}
@@ -145,7 +149,7 @@ Note that for vendored modules, that is the version listed and not the one from
 			},
 			&simpleCommand{
 				name:  "clean",
-				short: "Delete the Hugo Module cache for the current project.",
+				short: "Delete the Hugo Module cache for the current project",
 				long:  `Delete the Hugo Module cache for the current project.`,
 				withc: func(cmd *cobra.Command, r *rootCommand) {
 					cmd.ValidArgsFunction = cobra.NoFileCompletions
@@ -171,7 +175,7 @@ Note that for vendored modules, that is the version listed and not the one from
 			},
 			&simpleCommand{
 				name:  "tidy",
-				short: "Remove unused entries in go.mod and go.sum.",
+				short: "Remove unused entries in go.mod and go.sum",
 				withc: func(cmd *cobra.Command, r *rootCommand) {
 					cmd.ValidArgsFunction = cobra.NoFileCompletions
 					applyLocalFlagsBuildConfig(cmd, r)
@@ -186,7 +190,7 @@ Note that for vendored modules, that is the version listed and not the one from
 			},
 			&simpleCommand{
 				name:  "vendor",
-				short: "Vendor all module dependencies into the _vendor directory.",
+				short: "Vendor all module dependencies into the _vendor directory",
 				long: `Vendor all module dependencies into the _vendor directory.
 	If a module is vendored, that is where Hugo will look for it's dependencies.
 	`,
@@ -205,16 +209,16 @@ Note that for vendored modules, that is the version listed and not the one from
 
 			&simpleCommand{
 				name:  "get",
-				short: "Resolves dependencies in your current Hugo Project.",
+				short: "Resolves dependencies in your current Hugo project",
 				long: `
-Resolves dependencies in your current Hugo Project.
+Resolves dependencies in your current Hugo project.
 
 Some examples:
 
 Install the latest version possible for a given module:
 
     hugo mod get github.com/gohugoio/testshortcodes
-    
+
 Install a specific version:
 
     hugo mod get github.com/gohugoio/testshortcodes@v0.3.0
@@ -271,7 +275,7 @@ Run "go help get" for more information. All flags available for "go get" is also
 
 								cfg := config.New()
 								cfg.Set("workingDir", dir)
-								conf, err := r.ConfigFromProvider(r.configVersionID.Add(1), flagsToCfg(cd, cfg))
+								conf, err := r.ConfigFromProvider(configKey{counter: r.configVersionID.Add(1)}, flagsToCfg(cd, cfg))
 								if err != nil {
 									return err
 								}
@@ -284,7 +288,7 @@ Run "go help get" for more information. All flags available for "go get" is also
 						})
 						return nil
 					} else {
-						conf, err := r.ConfigFromProvider(r.configVersionID.Load(), flagsToCfg(cd, nil))
+						conf, err := r.ConfigFromProvider(configKey{counter: r.configVersionID.Load()}, flagsToCfg(cd, nil))
 						if err != nil {
 							return err
 						}
@@ -313,7 +317,7 @@ func (c *modCommands) Name() string {
 }
 
 func (c *modCommands) Run(ctx context.Context, cd *simplecobra.Commandeer, args []string) error {
-	_, err := c.r.ConfigFromProvider(c.r.configVersionID.Load(), nil)
+	_, err := c.r.ConfigFromProvider(configKey{counter: c.r.configVersionID.Load()}, nil)
 	if err != nil {
 		return err
 	}
@@ -324,7 +328,7 @@ func (c *modCommands) Run(ctx context.Context, cd *simplecobra.Commandeer, args
 
 func (c *modCommands) Init(cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Short = "Various Hugo Modules helpers."
+	cmd.Short = "Manage modules"
 	cmd.Long = `Various helpers to help manage the modules in your project's dependency graph.
 Most operations here requires a Go version installed on your system (>= Go 1.12) and the relevant VCS client (typically Git).
 This is not needed if you only operate on modules inside /themes or if you have vendored them via "hugo mod vendor".

commands/new.go

@@ -40,7 +40,7 @@ func newNewCommand() *newCommand {
 			&simpleCommand{
 				name:  "content",
 				use:   "content [path]",
-				short: "Create new content for your site",
+				short: "Create new content",
 				long: `Create a new content file and automatically set the date and title.
 It will guess which kind of file to create based on the path provided.
 
@@ -76,10 +76,8 @@ Ensure you run this within the root directory of your site.`,
 			&simpleCommand{
 				name:  "site",
 				use:   "site [path]",
-				short: "Create a new site (skeleton)",
+				short: "Create a new site",
-				long: `Create a new site in the provided directory.
+				long:  `Create a new site at the specified path.`,
-The new site will have the correct structure, but no content or theme yet.
-Use ` + "`hugo new [contentPath]`" + ` to create new content.`,
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 					if len(args) < 1 {
 						return newUserError("path needs to be provided")
@@ -93,7 +91,7 @@ Use ` + "`hugo new [contentPath]`" + ` to create new content.`,
 					cfg.Set("workingDir", createpath)
 					cfg.Set("publishDir", "public")
 
-					conf, err := r.ConfigFromProvider(r.configVersionID.Load(), flagsToCfg(cd, cfg))
+					conf, err := r.ConfigFromProvider(configKey{counter: r.configVersionID.Load()}, flagsToCfg(cd, cfg))
 					if err != nil {
 						return err
 					}
@@ -124,11 +122,9 @@ Use ` + "`hugo new [contentPath]`" + ` to create new content.`,
 			&simpleCommand{
 				name:  "theme",
 				use:   "theme [name]",
-				short: "Create a new theme (skeleton)",
+				short: "Create a new theme",
-				long: `Create a new theme (skeleton) called [name] in ./themes.
+				long: `Create a new theme with the specified name in the ./themes directory.
-New theme is a skeleton. Please add content to the touched files. Add your
+This generates a functional theme including template examples and sample content.`,
-name to the copyright line in the license and adjust the theme.toml file
-according to your needs.`,
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 					if len(args) < 1 {
 						return newUserError("theme name needs to be provided")
@@ -136,7 +132,7 @@ according to your needs.`,
 					cfg := config.New()
 					cfg.Set("publishDir", "public")
 
-					conf, err := r.ConfigFromProvider(r.configVersionID.Load(), flagsToCfg(cd, cfg))
+					conf, err := r.ConfigFromProvider(configKey{counter: r.configVersionID.Load()}, flagsToCfg(cd, cfg))
 					if err != nil {
 						return err
 					}
@@ -144,7 +140,7 @@ according to your needs.`,
 					createpath := paths.AbsPathify(conf.configs.Base.WorkingDir, filepath.Join(conf.configs.Base.ThemesDir, args[0]))
 					r.Println("Creating new theme in", createpath)
 
-					err = skeletons.CreateTheme(createpath, sourceFs)
+					err = skeletons.CreateTheme(createpath, sourceFs, format)
 					if err != nil {
 						return err
 					}
@@ -152,7 +148,14 @@ according to your needs.`,
 					return nil
 				},
 				withc: func(cmd *cobra.Command, r *rootCommand) {
-					cmd.ValidArgsFunction = cobra.NoFileCompletions
+					cmd.ValidArgsFunction = func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+						if len(args) != 0 {
+							return []string{}, cobra.ShellCompDirectiveNoFileComp
+						}
+						return []string{}, cobra.ShellCompDirectiveNoFileComp | cobra.ShellCompDirectiveFilterDirs
+					}
+					cmd.Flags().StringVar(&format, "format", "toml", "preferred file format (toml, yaml or json)")
+					_ = cmd.RegisterFlagCompletionFunc("format", cobra.FixedCompletions([]string{"toml", "yaml", "json"}, cobra.ShellCompDirectiveNoFileComp))
 				},
 			},
 		},
@@ -181,7 +184,7 @@ func (c *newCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args [
 
 func (c *newCommand) Init(cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Short = "Create new content for your site"
+	cmd.Short = "Create new content"
 	cmd.Long = `Create a new content file and automatically set the date and title.
 It will guess which kind of file to create based on the path provided.
 

commands/release.go

@@ -32,7 +32,7 @@ func newReleaseCommand() simplecobra.Commander {
 
 	return &simpleCommand{
 		name:  "release",
-		short: "Release a new version of Hugo.",
+		short: "Release a new version of Hugo",
 		run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 			rel, err := releaser.New(skipPush, try, step)
 			if err != nil {

commands/server.go

@@ -23,6 +23,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"maps"
 	"net"
 	"net/http"
 	_ "net/http/pprof"
@@ -32,6 +33,7 @@ import (
 	"path"
 	"path/filepath"
 	"regexp"
+	"sort"
 	"strconv"
 	"strings"
 	"sync"
@@ -40,12 +42,14 @@ import (
 	"time"
 
 	"github.com/bep/mclib"
+	"github.com/pkg/browser"
 
 	"github.com/bep/debounce"
 	"github.com/bep/simplecobra"
 	"github.com/fsnotify/fsnotify"
 	"github.com/gohugoio/hugo/common/herrors"
 	"github.com/gohugoio/hugo/common/hugo"
+	"github.com/gohugoio/hugo/tpl/tplimpl"
 
 	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/common/urls"
@@ -55,7 +59,6 @@ import (
 	"github.com/gohugoio/hugo/hugolib"
 	"github.com/gohugoio/hugo/hugolib/filesystems"
 	"github.com/gohugoio/hugo/livereload"
-	"github.com/gohugoio/hugo/tpl"
 	"github.com/gohugoio/hugo/transform"
 	"github.com/gohugoio/hugo/transform/livereloadinject"
 	"github.com/spf13/afero"
@@ -82,10 +85,14 @@ const (
 	configChangeGoWork = "go work file"
 )
 
+const (
+	hugoHeaderRedirect = "X-Hugo-Redirect"
+)
+
 func newHugoBuilder(r *rootCommand, s *serverCommand, onConfigLoaded ...func(reloaded bool) error) *hugoBuilder {
-	var visitedURLs *types.EvictingStringQueue
+	var visitedURLs *types.EvictingQueue[string]
 	if s != nil && !s.disableFastRender {
-		visitedURLs = types.NewEvictingStringQueue(20)
+		visitedURLs = types.NewEvictingQueue[string](20)
 	}
 	return &hugoBuilder{
 		r:              r,
@@ -113,7 +120,7 @@ func newServerCommand() *serverCommand {
 		commands: []simplecobra.Commander{
 			&simpleCommand{
 				name:  "trust",
-				short: "Install the local CA in the system trust store.",
+				short: "Install the local CA in the system trust store",
 				run: func(ctx context.Context, cd *simplecobra.Commandeer, r *rootCommand, args []string) error {
 					action := "-install"
 					if uninstall {
@@ -189,9 +196,7 @@ func (f *fileChangeDetector) PrepareNew() {
 	}
 
 	f.prev = make(map[string]uint64)
-	for k, v := range f.current {
+	maps.Copy(f.prev, f.current)
-		f.prev[k] = v
-	}
 	f.current = make(map[string]uint64)
 }
 
@@ -209,16 +214,17 @@ func (f *fileChangeDetector) changed() []string {
 		}
 	}
 
-	return f.filterIrrelevant(c)
+	return f.filterIrrelevantAndSort(c)
 }
 
-func (f *fileChangeDetector) filterIrrelevant(in []string) []string {
+func (f *fileChangeDetector) filterIrrelevantAndSort(in []string) []string {
 	var filtered []string
 	for _, v := range in {
 		if !f.irrelevantRe.MatchString(v) {
 			filtered = append(filtered, v)
 		}
 	}
+	sort.Strings(filtered)
 	return filtered
 }
 
@@ -304,64 +310,65 @@ func (f *fileServer) createEndpoint(i int) (*http.ServeMux, net.Listener, string
 				w.Header().Set(header.Key, header.Value)
 			}
 
-			if redirect := serverConfig.MatchRedirect(requestURI); !redirect.IsZero() {
+			if canRedirect(requestURI, r) {
-				// fullName := filepath.Join(dir, filepath.FromSlash(path.Clean("/"+name)))
+				if redirect := serverConfig.MatchRedirect(requestURI, r.Header); !redirect.IsZero() {
-				doRedirect := true
+					doRedirect := true
-				// This matches Netlify's behavior and is needed for SPA behavior.
+					// This matches Netlify's behavior and is needed for SPA behavior.
-				// See https://docs.netlify.com/routing/redirects/rewrites-proxies/
+					// See https://docs.netlify.com/routing/redirects/rewrites-proxies/
-				if !redirect.Force {
+					if !redirect.Force {
-					path := filepath.Clean(strings.TrimPrefix(requestURI, baseURL.Path()))
+						path := filepath.Clean(strings.TrimPrefix(requestURI, baseURL.Path()))
-					if root != "" {
+						if root != "" {
-						path = filepath.Join(root, path)
+							path = filepath.Join(root, path)
-					}
-					var fs afero.Fs
-					f.c.withConf(func(conf *commonConfig) {
-						fs = conf.fs.PublishDirServer
-					})
-
-					fi, err := fs.Stat(path)
-
-					if err == nil {
-						if fi.IsDir() {
-							// There will be overlapping directories, so we
-							// need to check for a file.
-							_, err = fs.Stat(filepath.Join(path, "index.html"))
-							doRedirect = err != nil
-						} else {
-							doRedirect = false
 						}
-					}
+						var fs afero.Fs
-				}
+						f.c.withConf(func(conf *commonConfig) {
+							fs = conf.fs.PublishDirServer
+						})
+
+						fi, err := fs.Stat(path)
 
-				if doRedirect {
-					switch redirect.Status {
-					case 404:
-						w.WriteHeader(404)
-						file, err := fs.Open(strings.TrimPrefix(redirect.To, baseURL.Path()))
 						if err == nil {
-							defer file.Close()
+							if fi.IsDir() {
-							io.Copy(w, file)
+								// There will be overlapping directories, so we
-						} else {
+								// need to check for a file.
-							fmt.Fprintln(w, "<h1>Page Not Found</h1>")
+								_, err = fs.Stat(filepath.Join(path, "index.html"))
+								doRedirect = err != nil
+							} else {
+								doRedirect = false
+							}
 						}
-						return
+					}
-					case 200:
-						if r2 := f.rewriteRequest(r, strings.TrimPrefix(redirect.To, baseURL.Path())); r2 != nil {
-							requestURI = redirect.To
-							r = r2
-						}
-					default:
-						w.Header().Set("Content-Type", "")
-						http.Redirect(w, r, redirect.To, redirect.Status)
-						return
 
+					if doRedirect {
+						w.Header().Set(hugoHeaderRedirect, "true")
+						switch redirect.Status {
+						case 404:
+							w.WriteHeader(404)
+							file, err := fs.Open(strings.TrimPrefix(redirect.To, baseURL.Path()))
+							if err == nil {
+								defer file.Close()
+								io.Copy(w, file)
+							} else {
+								fmt.Fprintln(w, "<h1>Page Not Found</h1>")
+							}
+							return
+						case 200:
+							if r2 := f.rewriteRequest(r, strings.TrimPrefix(redirect.To, baseURL.Path())); r2 != nil {
+								requestURI = redirect.To
+								r = r2
+							}
+						default:
+							w.Header().Set("Content-Type", "")
+							http.Redirect(w, r, redirect.To, redirect.Status)
+							return
+
+						}
 					}
 				}
-
 			}
 
 			if f.c.fastRenderMode && f.c.errState.buildErr() == nil {
-				if strings.HasSuffix(requestURI, "/") || strings.HasSuffix(requestURI, "html") || strings.HasSuffix(requestURI, "htm") {
+				if isNavigation(requestURI, r) {
 					if !f.c.visitedURLs.Contains(requestURI) {
 						// If not already on stack, re-render that single page.
 						if err := f.c.partialReRender(requestURI); err != nil {
@@ -448,6 +455,7 @@ type serverCommand struct {
 	// Flags.
 	renderStaticToDisk  bool
 	navigateToChanged   bool
+	openBrowser         bool
 	serverAppend        bool
 	serverInterface     string
 	tlsCertFile         string
@@ -508,7 +516,7 @@ func (c *serverCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, arg
 
 func (c *serverCommand) Init(cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Short = "A high performance webserver"
+	cmd.Short = "Start the embedded web server"
 	cmd.Long = `Hugo provides its own webserver which builds and serves the site.
 While hugo server is high performance, it is a webserver with limited options.
 
@@ -539,6 +547,7 @@ of a second, you will be able to save and see your changes nearly instantly.`
 	cmd.Flags().BoolVarP(&c.serverAppend, "appendPort", "", true, "append port to baseURL")
 	cmd.Flags().BoolVar(&c.disableLiveReload, "disableLiveReload", false, "watch without enabling live browser reload on rebuild")
 	cmd.Flags().BoolVarP(&c.navigateToChanged, "navigateToChanged", "N", false, "navigate to changed content file on live browser reload")
+	cmd.Flags().BoolVarP(&c.openBrowser, "openBrowser", "O", false, "open the site in a browser after server startup")
 	cmd.Flags().BoolVar(&c.renderStaticToDisk, "renderStaticToDisk", false, "serve static files from disk and dynamic files from memory")
 	cmd.Flags().BoolVar(&c.disableFastRender, "disableFastRender", false, "enables full re-renders on changes")
 	cmd.Flags().BoolVar(&c.disableBrowserError, "disableBrowserError", false, "do not show build errors in the browser")
@@ -618,7 +627,7 @@ func (c *serverCommand) setServerInfoInConfig() error {
 		panic("no server ports set")
 	}
 	return c.withConfE(func(conf *commonConfig) error {
-		for i, language := range conf.configs.Languages {
+		for i, language := range conf.configs.LanguagesDefaultFirst {
 			isMultihost := conf.configs.IsMultihost
 			var serverPort int
 			if isMultihost {
@@ -648,9 +657,8 @@ func (c *serverCommand) setServerInfoInConfig() error {
 }
 
 func (c *serverCommand) getErrorWithContext() any {
-	errCount := c.errCount()
+	buildErr := c.errState.buildErr()
-
+	if buildErr == nil {
-	if errCount == 0 {
 		return nil
 	}
 
@@ -659,7 +667,7 @@ func (c *serverCommand) getErrorWithContext() any {
 	m["Error"] = cleanErrorLog(c.r.logger.Errors())
 
 	m["Version"] = hugo.BuildVersionString()
-	ferrors := herrors.UnwrapFileErrorsWithErrorContext(c.errState.buildErr())
+	ferrors := herrors.UnwrapFileErrorsWithErrorContext(buildErr)
 	m["Files"] = ferrors
 
 	return m
@@ -750,7 +758,7 @@ func (c *serverCommand) createServerPorts(cd *simplecobra.Commandeer) error {
 			c.serverPorts = make([]serverPortListener, len(conf.configs.Languages))
 		}
 		currentServerPort := c.serverPort
-		for i := 0; i < len(c.serverPorts); i++ {
+		for i := range c.serverPorts {
 			l, err := net.Listen("tcp", net.JoinHostPort(c.serverInterface, strconv.Itoa(currentServerPort)))
 			if err == nil {
 				c.serverPorts[i] = serverPortListener{ln: l, p: currentServerPort}
@@ -830,22 +838,25 @@ func (c *serverCommand) fixURL(baseURLFromConfig, baseURLFromFlag string, port i
 	return u.String(), nil
 }
 
-func (c *serverCommand) partialReRender(urls ...string) error {
+func (c *serverCommand) partialReRender(urls ...string) (err error) {
 	defer func() {
 		c.errState.setWasErr(false)
 	}()
-	c.errState.setBuildErr(nil)
+	visited := types.NewEvictingQueue[string](len(urls))
-	visited := types.NewEvictingStringQueue(len(urls))
 	for _, url := range urls {
 		visited.Add(url)
 	}
 
-	h, err := c.hugo()
+	var h *hugolib.HugoSites
+	h, err = c.hugo()
 	if err != nil {
-		return err
+		return
 	}
+
 	// Note: We do not set NoBuildLock as the file lock is not acquired at this stage.
-	return h.Build(hugolib.BuildCfg{NoBuildLock: false, RecentlyVisited: visited, PartialReRender: true, ErrRecovery: c.errState.wasErr()})
+	err = h.Build(hugolib.BuildCfg{NoBuildLock: false, RecentlyTouched: visited, PartialReRender: true, ErrRecovery: c.errState.wasErr()})
+
+	return
 }
 
 func (c *serverCommand) serve() error {
@@ -886,16 +897,16 @@ func (c *serverCommand) serve() error {
 	// To allow the en user to change the error template while the server is running, we use
 	// the freshest template we can provide.
 	var (
-		errTempl     tpl.Template
+		errTempl     *tplimpl.TemplInfo
-		templHandler tpl.TemplateHandler
+		templHandler *tplimpl.TemplateStore
 	)
-	getErrorTemplateAndHandler := func(h *hugolib.HugoSites) (tpl.Template, tpl.TemplateHandler) {
+	getErrorTemplateAndHandler := func(h *hugolib.HugoSites) (*tplimpl.TemplInfo, *tplimpl.TemplateStore) {
 		if h == nil {
 			return errTempl, templHandler
 		}
-		templHandler := h.Tmpl()
+		templHandler := h.GetTemplateStore()
-		errTempl, found := templHandler.Lookup("_server/error.html")
+		errTempl := templHandler.LookupByPath("/_server/error.html")
-		if !found {
+		if errTempl == nil {
 			panic("template server/error.html not found")
 		}
 		return errTempl, templHandler
@@ -996,6 +1007,13 @@ func (c *serverCommand) serve() error {
 
 	c.r.Println("Press Ctrl+C to stop")
 
+	if c.openBrowser {
+		// There may be more than one baseURL in multihost mode, open the first.
+		if err := browser.OpenURL(baseURLs[0].String()); err != nil {
+			c.r.logger.Warnf("Failed to open browser: %s", err)
+		}
+	}
+
 	err = func() error {
 		for {
 			select {
@@ -1012,10 +1030,6 @@ func (c *serverCommand) serve() error {
 		c.r.Println("Error:", err)
 	}
 
-	if h := c.hugoTry(); h != nil {
-		h.Close()
-	}
-
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()
 	wg2, ctx := errgroup.WithContext(ctx)
@@ -1220,3 +1234,24 @@ func formatByteCount(b uint64) string {
 	return fmt.Sprintf("%.1f %cB",
 		float64(b)/float64(div), "kMGTPE"[exp])
 }
+
+func canRedirect(requestURIWithoutQuery string, r *http.Request) bool {
+	if r.Header.Get(hugoHeaderRedirect) != "" {
+		return false
+	}
+	return isNavigation(requestURIWithoutQuery, r)
+}
+
+// Sec-Fetch-Mode should be sent by all recent browser versions, see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Sec-Fetch-Mode#navigate
+// Fall back to the file extension if not set.
+// The main take here is that we don't want to have CSS/JS files etc. partake in this logic.
+func isNavigation(requestURIWithoutQuery string, r *http.Request) bool {
+	return r.Header.Get("Sec-Fetch-Mode") == "navigate" || isPropablyHTMLRequest(requestURIWithoutQuery)
+}
+
+func isPropablyHTMLRequest(requestURIWithoutQuery string) bool {
+	if strings.HasSuffix(requestURIWithoutQuery, "/") || strings.HasSuffix(requestURIWithoutQuery, "html") || strings.HasSuffix(requestURIWithoutQuery, "htm") {
+		return true
+	}
+	return !strings.Contains(requestURIWithoutQuery, ".")
+}

common/collections/append.go

@@ -117,7 +117,7 @@ func appendToInterfaceSliceFromValues(slice1, slice2 reflect.Value) ([]any, erro
 			tos = append(tos, nil)
 			continue
 		}
-		for i := 0; i < slice.Len(); i++ {
+		for i := range slice.Len() {
 			tos = append(tos, slice.Index(i).Interface())
 		}
 	}
@@ -128,7 +128,7 @@ func appendToInterfaceSliceFromValues(slice1, slice2 reflect.Value) ([]any, erro
 func appendToInterfaceSlice(tov reflect.Value, from ...any) ([]any, error) {
 	var tos []any
 
-	for i := 0; i < tov.Len(); i++ {
+	for i := range tov.Len() {
 		tos = append(tos, tov.Index(i).Interface())
 	}
 

common/collections/append_test.go

@@ -15,6 +15,7 @@ package collections
 
 import (
 	"html/template"
+	"reflect"
 	"testing"
 
 	qt "github.com/frankban/quicktest"
@@ -77,6 +78,7 @@ func TestAppend(t *testing.T) {
 		{[]string{"a", "b"}, []any{nil}, []any{"a", "b", nil}},
 		{[]string{"a", "b"}, []any{nil, "d", nil}, []any{"a", "b", nil, "d", nil}},
 		{[]any{"a", nil, "c"}, []any{"d", nil, "f"}, []any{"a", nil, "c", "d", nil, "f"}},
+		{[]string{"a", "b"}, []any{}, []string{"a", "b"}},
 	} {
 
 		result, err := Append(test.start, test.addend...)
@@ -146,3 +148,66 @@ func TestAppendShouldMakeACopyOfTheInputSlice(t *testing.T) {
 	c.Assert(result, qt.DeepEquals, []string{"a", "b", "c"})
 	c.Assert(slice, qt.DeepEquals, []string{"d", "b"})
 }
+
+func TestIndirect(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	type testStruct struct {
+		Field string
+	}
+
+	var (
+		nilPtr      *testStruct
+		nilIface    interface{} = nil
+		nonNilIface interface{} = &testStruct{Field: "hello"}
+	)
+
+	tests := []struct {
+		name     string
+		input    any
+		wantKind reflect.Kind
+		wantNil  bool
+	}{
+		{
+			name:     "nil pointer",
+			input:    nilPtr,
+			wantKind: reflect.Ptr,
+			wantNil:  true,
+		},
+		{
+			name:     "nil interface",
+			input:    nilIface,
+			wantKind: reflect.Invalid,
+			wantNil:  false,
+		},
+		{
+			name:     "non-nil pointer to struct",
+			input:    &testStruct{Field: "abc"},
+			wantKind: reflect.Struct,
+			wantNil:  false,
+		},
+		{
+			name:     "non-nil interface holding pointer",
+			input:    nonNilIface,
+			wantKind: reflect.Struct,
+			wantNil:  false,
+		},
+		{
+			name:     "plain value",
+			input:    testStruct{Field: "xyz"},
+			wantKind: reflect.Struct,
+			wantNil:  false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			v := reflect.ValueOf(tt.input)
+			got, isNil := indirect(v)
+
+			c.Assert(got.Kind(), qt.Equals, tt.wantKind)
+			c.Assert(isNil, qt.Equals, tt.wantNil)
+		})
+	}
+}

common/collections/slice_test.go

@@ -136,3 +136,37 @@ func TestSortedStringSlice(t *testing.T) {
 	c.Assert(s.Count("z"), qt.Equals, 0)
 	c.Assert(s.Count("a"), qt.Equals, 1)
 }
+
+func TestStringSliceToInterfaceSlice(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	tests := []struct {
+		name string
+		in   []string
+		want []any
+	}{
+		{
+			name: "empty slice",
+			in:   []string{},
+			want: []any{},
+		},
+		{
+			name: "single element",
+			in:   []string{"hello"},
+			want: []any{"hello"},
+		},
+		{
+			name: "multiple elements",
+			in:   []string{"a", "b", "c"},
+			want: []any{"a", "b", "c"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := StringSliceToInterfaceSlice(tt.in)
+			c.Assert(got, qt.DeepEquals, tt.want)
+		})
+	}
+}

common/collections/stack.go

@@ -13,6 +13,8 @@
 
 package collections
 
+import "slices"
+
 import "sync"
 
 // Stack is a simple LIFO stack that is safe for concurrent use.
@@ -73,7 +75,7 @@ func (s *Stack[T]) DrainMatching(predicate func(T) bool) []T {
 	for i := len(s.items) - 1; i >= 0; i-- {
 		if predicate(s.items[i]) {
 			items = append(items, s.items[i])
-			s.items = append(s.items[:i], s.items[i+1:]...)
+			s.items = slices.Delete(s.items, i, i+1)
 		}
 	}
 	return items

common/collections/stack_test.go

@@ -0,0 +1,77 @@
+package collections
+
+import (
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+)
+
+func TestNewStack(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	s := NewStack[int]()
+
+	c.Assert(s, qt.IsNotNil)
+}
+
+func TestStackBasic(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	s := NewStack[int]()
+
+	c.Assert(s.Len(), qt.Equals, 0)
+
+	s.Push(1)
+	s.Push(2)
+	s.Push(3)
+
+	c.Assert(s.Len(), qt.Equals, 3)
+
+	top, ok := s.Peek()
+	c.Assert(ok, qt.Equals, true)
+	c.Assert(top, qt.Equals, 3)
+
+	popped, ok := s.Pop()
+	c.Assert(ok, qt.Equals, true)
+	c.Assert(popped, qt.Equals, 3)
+
+	c.Assert(s.Len(), qt.Equals, 2)
+
+	_, _ = s.Pop()
+	_, _ = s.Pop()
+	_, ok = s.Pop()
+
+	c.Assert(ok, qt.Equals, false)
+}
+
+func TestStackDrain(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	s := NewStack[string]()
+	s.Push("a")
+	s.Push("b")
+
+	got := s.Drain()
+
+	c.Assert(got, qt.DeepEquals, []string{"a", "b"})
+	c.Assert(s.Len(), qt.Equals, 0)
+}
+
+func TestStackDrainMatching(t *testing.T) {
+	t.Parallel()
+	c := qt.New(t)
+
+	s := NewStack[int]()
+	s.Push(1)
+	s.Push(2)
+	s.Push(3)
+	s.Push(4)
+
+	got := s.DrainMatching(func(v int) bool { return v%2 == 0 })
+
+	c.Assert(got, qt.DeepEquals, []int{4, 2})
+	c.Assert(s.Drain(), qt.DeepEquals, []int{1, 3})
+}

common/constants/constants.go

@@ -21,6 +21,10 @@ const (
 	ErrRemoteGetCSV  = "error-remote-getcsv"
 
 	WarnFrontMatterParamsOverrides = "warning-frontmatter-params-overrides"
+	WarnRenderShortcodesInHTML     = "warning-rendershortcodes-in-html"
+	WarnGoldmarkRawHTML            = "warning-goldmark-raw-html"
+	WarnPartialSuperfluousPrefix   = "warning-partial-superfluous-prefix"
+	WarnHomePageIsLeafBundle       = "warning-home-page-is-leaf-bundle"
 )
 
 // Field/method names with special meaning.
@@ -39,7 +43,7 @@ const (
 	ResourceTransformationFingerprint = "fingerprint"
 )
 
-// IsResourceTransformationLinkChange returns whether the given name is a resource transformation that changes the permalink based on the content.
+// IsResourceTransformationPermalinkHash returns whether the given name is a resource transformation that changes the permalink based on the content.
 func IsResourceTransformationPermalinkHash(name string) bool {
 	return name == ResourceTransformationFingerprint
 }

common/hashing/hashing.go

@@ -38,6 +38,19 @@ func XXHashFromReader(r io.Reader) (uint64, int64, error) {
 	return h.Sum64(), size, nil
 }
 
+// XxHashFromReaderHexEncoded calculates the xxHash for the given reader
+// and returns the hash as a hex encoded string.
+func XxHashFromReaderHexEncoded(r io.Reader) (string, error) {
+	h := getXxHashReadFrom()
+	defer putXxHashReadFrom(h)
+	_, err := io.Copy(h, r)
+	if err != nil {
+		return "", err
+	}
+	hash := h.Sum(nil)
+	return hex.EncodeToString(hash), nil
+}
+
 // XXHashFromString calculates the xxHash for the given string.
 func XXHashFromString(s string) (uint64, error) {
 	h := xxhash.New()
@@ -70,6 +83,13 @@ func HashString(vs ...any) string {
 	return strconv.FormatUint(hash, 10)
 }
 
+// HashStringHex returns a hash from the given elements as a hex encoded string.
+// See HashString for more information.
+func HashStringHex(vs ...any) string {
+	hash := HashUint64(vs...)
+	return strconv.FormatUint(hash, 16)
+}
+
 var hashOptsPool = sync.Pool{
 	New: func() any {
 		return &hashstructure.HashOptions{
@@ -103,16 +123,24 @@ func HashUint64(vs ...any) uint64 {
 		o = elements
 	}
 
-	hashOpts := getHashOpts()
+	hash, err := Hash(o)
-	defer putHashOpts(hashOpts)
-
-	hash, err := hashstructure.Hash(o, hashOpts)
 	if err != nil {
 		panic(err)
 	}
 	return hash
 }
 
+// Hash returns a hash from vs.
+func Hash(vs ...any) (uint64, error) {
+	hashOpts := getHashOpts()
+	defer putHashOpts(hashOpts)
+	var v any = vs
+	if len(vs) == 1 {
+		v = vs[0]
+	}
+	return hashstructure.Hash(v, hashOpts)
+}
+
 type keyer interface {
 	Key() string
 }

common/hashing/hashing_test.go

@@ -37,12 +37,12 @@ func TestXxHashFromReaderPara(t *testing.T) {
 	c := qt.New(t)
 
 	var wg sync.WaitGroup
-	for i := 0; i < 10; i++ {
+	for i := range 10 {
 		i := i
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			for j := 0; j < 100; j++ {
+			for j := range 100 {
 				s := strings.Repeat("Hello ", i+j+1*42)
 				r := strings.NewReader(s)
 				got, size, err := XXHashFromReader(r)
@@ -142,3 +142,16 @@ func BenchmarkHashString(b *testing.B) {
 		})
 	}
 }
+
+func BenchmarkHashMap(b *testing.B) {
+	m := map[string]any{}
+	for i := range 1000 {
+		m[fmt.Sprintf("key%d", i)] = i
+	}
+
+	b.ResetTimer()
+
+	for i := 0; i < b.N; i++ {
+		HashString(m)
+	}
+}

common/herrors/error_locator.go

@@ -152,10 +152,7 @@ func locateError(r io.Reader, le FileError, matches LineMatcherFn) *ErrorContext
 	}
 
 	if ectx.Position.LineNumber > 0 {
-		low := ectx.Position.LineNumber - 3
+		low := max(ectx.Position.LineNumber-3, 0)
-		if low < 0 {
-			low = 0
-		}
 
 		if ectx.Position.LineNumber > 2 {
 			ectx.LinesPos = 2
@@ -163,10 +160,7 @@ func locateError(r io.Reader, le FileError, matches LineMatcherFn) *ErrorContext
 			ectx.LinesPos = ectx.Position.LineNumber - 1
 		}
 
-		high := ectx.Position.LineNumber + 2
+		high := min(ectx.Position.LineNumber+2, len(lines))
-		if high > len(lines) {
-			high = len(lines)
-		}
 
 		ectx.Lines = lines[low:high]
 

common/herrors/errors.go

@@ -133,11 +133,26 @@ func IsNotExist(err error) bool {
 	return false
 }
 
+// IsExist returns true if the error is a file exists error.
+// Unlike os.IsExist, this also considers wrapped errors.
+func IsExist(err error) bool {
+	if os.IsExist(err) {
+		return true
+	}
+
+	// os.IsExist does not consider wrapped errors.
+	if os.IsExist(errors.Unwrap(err)) {
+		return true
+	}
+
+	return false
+}
+
 var nilPointerErrRe = regexp.MustCompile(`at <(.*)>: error calling (.*?): runtime error: invalid memory address or nil pointer dereference`)
 
 const deferredPrefix = "__hdeferred/"
 
-var deferredStringToRemove = regexp.MustCompile(`executing "__hdeferred/.*" `)
+var deferredStringToRemove = regexp.MustCompile(`executing "__hdeferred/.*?" `)
 
 // ImproveRenderErr improves the error message for rendering errors.
 func ImproveRenderErr(inErr error) (outErr error) {

common/herrors/file_error.go

@@ -20,8 +20,6 @@ import (
 	"io"
 	"path/filepath"
 
-	godartsassv1 "github.com/bep/godartsass"
-
 	"github.com/bep/godartsass/v2"
 	"github.com/bep/golibsass/libsass/libsasserrors"
 	"github.com/gohugoio/hugo/common/paths"
@@ -153,8 +151,6 @@ func (e *fileError) causeString() string {
 	// Avoid repeating the file info in the error message.
 	case godartsass.SassError:
 		return v.Message
-	case godartsassv1.SassError:
-		return v.Message
 	case libsasserrors.Error:
 		return v.Message
 	default:
@@ -262,8 +258,27 @@ func openFile(filename string, fs afero.Fs) (afero.File, string, error) {
 	return f, realFilename, nil
 }
 
-// Cause returns the underlying error or itself if it does not implement Unwrap.
+// Cause returns the underlying error, that is,
+// it unwraps errors until it finds one that does not implement
+// the Unwrap method.
+// For a shallow variant, see Unwrap.
 func Cause(err error) error {
+	type unwrapper interface {
+		Unwrap() error
+	}
+
+	for err != nil {
+		cause, ok := err.(unwrapper)
+		if !ok {
+			break
+		}
+		err = cause.Unwrap()
+	}
+	return err
+}
+
+// Unwrap returns the underlying error or itself if it does not implement Unwrap.
+func Unwrap(err error) error {
 	if u := errors.Unwrap(err); u != nil {
 		return u
 	}
@@ -271,7 +286,7 @@ func Cause(err error) error {
 }
 
 func extractFileTypePos(err error) (string, text.Position) {
-	err = Cause(err)
+	err = Unwrap(err)
 
 	var fileType string
 
@@ -388,14 +403,7 @@ func extractPosition(e error) (pos text.Position) {
 	case godartsass.SassError:
 		span := v.Span
 		start := span.Start
-		filename, _ := paths.UrlToFilename(span.Url)
+		filename, _ := paths.UrlStringToFilename(span.Url)
-		pos.Filename = filename
-		pos.Offset = start.Offset
-		pos.ColumnNumber = start.Column
-	case godartsassv1.SassError:
-		span := v.Span
-		start := span.Start
-		filename, _ := paths.UrlToFilename(span.Url)
 		pos.Filename = filename
 		pos.Offset = start.Offset
 		pos.ColumnNumber = start.Column

common/hexec/exec.go

@@ -26,7 +26,9 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/cli/safeexec"
+	"github.com/bep/logg"
+	"github.com/gohugoio/hugo/common/loggers"
+	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/config/security"
 )
@@ -86,7 +88,7 @@ var WithEnviron = func(env []string) func(c *commandeer) {
 }
 
 // New creates a new Exec using the provided security config.
-func New(cfg security.Config, workingDir string) *Exec {
+func New(cfg security.Config, workingDir string, log loggers.Logger) *Exec {
 	var baseEnviron []string
 	for _, v := range os.Environ() {
 		k, _ := config.SplitEnvVar(v)
@@ -96,9 +98,11 @@ func New(cfg security.Config, workingDir string) *Exec {
 	}
 
 	return &Exec{
-		sc:          cfg,
+		sc:                cfg,
-		workingDir:  workingDir,
+		workingDir:        workingDir,
-		baseEnviron: baseEnviron,
+		infol:             log.InfoCommand("exec"),
+		baseEnviron:       baseEnviron,
+		newNPXRunnerCache: maps.NewCache[string, func(arg ...any) (Runner, error)](),
 	}
 }
 
@@ -108,28 +112,18 @@ func IsNotFound(err error) bool {
 	return errors.As(err, &notFoundErr)
 }
 
-// SafeCommand is a wrapper around os/exec Command which uses a LookPath
-// implementation that does not search in current directory before looking in PATH.
-// See https://github.com/cli/safeexec and the linked issues.
-func SafeCommand(name string, arg ...string) (*exec.Cmd, error) {
-	bin, err := safeexec.LookPath(name)
-	if err != nil {
-		return nil, err
-	}
-
-	return exec.Command(bin, arg...), nil
-}
-
 // Exec enforces a security policy for commands run via os/exec.
 type Exec struct {
 	sc         security.Config
 	workingDir string
+	infol      logg.LevelLogger
 
 	// os.Environ filtered by the Exec.OsEnviron whitelist filter.
 	baseEnviron []string
 
-	npxInit      sync.Once
+	newNPXRunnerCache *maps.Cache[string, func(arg ...any) (Runner, error)]
-	npxAvailable bool
+	npxInit           sync.Once
+	npxAvailable      bool
 }
 
 func (e *Exec) New(name string, arg ...any) (Runner, error) {
@@ -155,25 +149,86 @@ func (e *Exec) new(name string, fullyQualifiedName string, arg ...any) (Runner,
 	return cm.command(arg...)
 }
 
+type binaryLocation int
+
+func (b binaryLocation) String() string {
+	switch b {
+	case binaryLocationNodeModules:
+		return "node_modules/.bin"
+	case binaryLocationNpx:
+		return "npx"
+	case binaryLocationPath:
+		return "PATH"
+	}
+	return "unknown"
+}
+
+const (
+	binaryLocationNodeModules binaryLocation = iota + 1
+	binaryLocationNpx
+	binaryLocationPath
+)
+
 // Npx will in order:
 // 1. Try fo find the binary in the WORKINGDIR/node_modules/.bin directory.
 // 2. If not found, and npx is available, run npx --no-install <name> <args>.
 // 3. Fall back to the PATH.
+// If name is "tailwindcss", we will try the PATH as the second option.
 func (e *Exec) Npx(name string, arg ...any) (Runner, error) {
-	// npx is slow, so first try the common case.
+	if err := e.sc.CheckAllowedExec(name); err != nil {
-	nodeBinFilename := filepath.Join(e.workingDir, nodeModulesBinPath, name)
+		return nil, err
-	_, err := safeexec.LookPath(nodeBinFilename)
-	if err == nil {
-		return e.new(name, nodeBinFilename, arg...)
 	}
-	e.checkNpx()
+
-	if e.npxAvailable {
+	newRunner, err := e.newNPXRunnerCache.GetOrCreate(name, func() (func(...any) (Runner, error), error) {
-		r, err := e.npx(name, arg...)
+		type tryFunc func() func(...any) (Runner, error)
-		if err == nil {
+		tryFuncs := map[binaryLocation]tryFunc{
-			return r, nil
+			binaryLocationNodeModules: func() func(...any) (Runner, error) {
+				nodeBinFilename := filepath.Join(e.workingDir, nodeModulesBinPath, name)
+				_, err := exec.LookPath(nodeBinFilename)
+				if err != nil {
+					return nil
+				}
+				return func(arg2 ...any) (Runner, error) {
+					return e.new(name, nodeBinFilename, arg2...)
+				}
+			},
+			binaryLocationNpx: func() func(...any) (Runner, error) {
+				e.checkNpx()
+				if !e.npxAvailable {
+					return nil
+				}
+				return func(arg2 ...any) (Runner, error) {
+					return e.npx(name, arg2...)
+				}
+			},
+			binaryLocationPath: func() func(...any) (Runner, error) {
+				if _, err := exec.LookPath(name); err != nil {
+					return nil
+				}
+				return func(arg2 ...any) (Runner, error) {
+					return e.New(name, arg2...)
+				}
+			},
 		}
+
+		locations := []binaryLocation{binaryLocationNodeModules, binaryLocationNpx, binaryLocationPath}
+		if name == "tailwindcss" {
+			// See https://github.com/gohugoio/hugo/issues/13221#issuecomment-2574801253
+			locations = []binaryLocation{binaryLocationNodeModules, binaryLocationPath, binaryLocationNpx}
+		}
+		for _, loc := range locations {
+			if f := tryFuncs[loc](); f != nil {
+				e.infol.Logf("resolve %q using %s", name, loc)
+				return f, nil
+			}
+		}
+		return nil, &NotFoundError{name: name, method: fmt.Sprintf("in %s", locations[len(locations)-1])}
+	})
+	if err != nil {
+		return nil, err
 	}
-	return e.New(name, arg...)
+
+	return newRunner(arg...)
 }
 
 const (
@@ -278,7 +333,7 @@ func (c *commandeer) command(arg ...any) (*cmdWrapper, error) {
 		bin = c.fullyQualifiedName
 	} else {
 		var err error
-		bin, err = safeexec.LookPath(c.name)
+		bin, err = exec.LookPath(c.name)
 		if err != nil {
 			return nil, &NotFoundError{
 				name:   c.name,
@@ -316,7 +371,7 @@ func InPath(binaryName string) bool {
 	if strings.Contains(binaryName, "/") {
 		panic("binary name should not contain any slash")
 	}
-	_, err := safeexec.LookPath(binaryName)
+	_, err := exec.LookPath(binaryName)
 	return err == nil
 }
 
@@ -326,7 +381,7 @@ func LookPath(binaryName string) string {
 	if strings.Contains(binaryName, "/") {
 		panic("binary name should not contain any slash")
 	}
-	s, err := safeexec.LookPath(binaryName)
+	s, err := exec.LookPath(binaryName)
 	if err != nil {
 		return ""
 	}

common/hreflect/helpers.go

@@ -74,6 +74,16 @@ func IsTruthful(in any) bool {
 	}
 }
 
+// IsMap reports whether v is a map.
+func IsMap(v any) bool {
+	return reflect.ValueOf(v).Kind() == reflect.Map
+}
+
+// IsSlice reports whether v is a slice.
+func IsSlice(v any) bool {
+	return reflect.ValueOf(v).Kind() == reflect.Slice
+}
+
 var zeroType = reflect.TypeOf((*types.Zeroer)(nil)).Elem()
 
 // IsTruthfulValue returns whether the given value has a meaningful truth value.
@@ -124,12 +134,7 @@ type methodKey struct {
 	name string
 }
 
-type methods struct {
+var methodCache sync.Map
-	sync.RWMutex
-	cache map[methodKey]int
-}
-
-var methodCache = &methods{cache: make(map[methodKey]int)}
 
 // GetMethodByName is the same as reflect.Value.MethodByName, but it caches the
 // type lookup.
@@ -147,22 +152,16 @@ func GetMethodByName(v reflect.Value, name string) reflect.Value {
 // -1 if no such method exists.
 func GetMethodIndexByName(tp reflect.Type, name string) int {
 	k := methodKey{tp, name}
-	methodCache.RLock()
+	v, found := methodCache.Load(k)
-	index, found := methodCache.cache[k]
-	methodCache.RUnlock()
 	if found {
-		return index
+		return v.(int)
 	}
-
-	methodCache.Lock()
-	defer methodCache.Unlock()
-
 	m, ok := tp.MethodByName(name)
-	index = m.Index
+	index := m.Index
 	if !ok {
 		index = -1
 	}
-	methodCache.cache[k] = index
+	methodCache.Store(k, index)
 
 	if !ok {
 		return -1
@@ -223,6 +222,27 @@ func AsTime(v reflect.Value, loc *time.Location) (time.Time, bool) {
 	return time.Time{}, false
 }
 
+// ToSliceAny converts the given value to a slice of any if possible.
+func ToSliceAny(v any) ([]any, bool) {
+	if v == nil {
+		return nil, false
+	}
+	switch vv := v.(type) {
+	case []any:
+		return vv, true
+	default:
+		vvv := reflect.ValueOf(v)
+		if vvv.Kind() == reflect.Slice {
+			out := make([]any, vvv.Len())
+			for i := range vvv.Len() {
+				out[i] = vvv.Index(i).Interface()
+			}
+			return out, true
+		}
+	}
+	return nil, false
+}
+
 func CallMethodByName(cxt context.Context, name string, v reflect.Value) []reflect.Value {
 	fn := v.MethodByName(name)
 	var args []reflect.Value

common/hreflect/helpers_test.go

@@ -50,6 +50,19 @@ func TestIsContextType(t *testing.T) {
 	c.Assert(IsContextType(reflect.TypeOf(valueCtx)), qt.IsTrue)
 }
 
+func TestToSliceAny(t *testing.T) {
+	c := qt.New(t)
+
+	checkOK := func(in any, expected []any) {
+		out, ok := ToSliceAny(in)
+		c.Assert(ok, qt.Equals, true)
+		c.Assert(out, qt.DeepEquals, expected)
+	}
+
+	checkOK([]any{1, 2, 3}, []any{1, 2, 3})
+	checkOK([]int{1, 2, 3}, []any{1, 2, 3})
+}
+
 func BenchmarkIsContextType(b *testing.B) {
 	type k string
 	b.Run("value", func(b *testing.B) {
@@ -121,3 +134,17 @@ func BenchmarkGetMethodByName(b *testing.B) {
 		}
 	}
 }
+
+func BenchmarkGetMethodByNamePara(b *testing.B) {
+	v := reflect.ValueOf(&testStruct{})
+	methods := []string{"Method1", "Method2", "Method3", "Method4", "Method5"}
+
+	b.ResetTimer()
+	b.RunParallel(func(pb *testing.PB) {
+		for pb.Next() {
+			for _, method := range methods {
+				_ = GetMethodByName(v, method)
+			}
+		}
+	})
+}

common/hstrings/strings.go

@@ -16,6 +16,7 @@ package hstrings
 import (
 	"fmt"
 	"regexp"
+	"slices"
 	"strings"
 	"sync"
 
@@ -50,12 +51,7 @@ func (s StringEqualFold) Eq(s2 any) bool {
 
 // EqualAny returns whether a string is equal to any of the given strings.
 func EqualAny(a string, b ...string) bool {
-	for _, s := range b {
+	return slices.Contains(b, a)
-		if a == s {
-			return true
-		}
-	}
-	return false
 }
 
 // regexpCache represents a cache of regexp objects protected by a mutex.
@@ -103,12 +99,7 @@ func GetOrCompileRegexp(pattern string) (re *regexp.Regexp, err error) {
 // InSlice checks if a string is an element of a slice of strings
 // and returns a boolean value.
 func InSlice(arr []string, el string) bool {
-	for _, v := range arr {
+	return slices.Contains(arr, el)
-		if v == el {
-			return true
-		}
-	}
-	return false
 }
 
 // InSlicEqualFold checks if a string is an element of a slice of strings
@@ -137,7 +128,7 @@ func ToString(v any) (string, bool) {
 	return "", false
 }
 
-type Tuple struct {
+type (
-	First  string
+	Strings2 [2]string
-	Second string
+	Strings3 [3]string
-}
+)

common/hugio/hasBytesWriter_test.go

@@ -46,18 +46,18 @@ func TestHasBytesWriter(t *testing.T) {
 		return strings.Repeat("ab cfo", r.Intn(33))
 	}
 
-	for i := 0; i < 22; i++ {
+	for range 22 {
 		h, w := neww()
-		fmt.Fprintf(w, rndStr()+"abc __foobar"+rndStr())
+		fmt.Fprint(w, rndStr()+"abc __foobar"+rndStr())
 		c.Assert(h.Patterns[0].Match, qt.Equals, true)
 
 		h, w = neww()
-		fmt.Fprintf(w, rndStr()+"abc __f")
+		fmt.Fprint(w, rndStr()+"abc __f")
-		fmt.Fprintf(w, "oo bar"+rndStr())
+		fmt.Fprint(w, "oo bar"+rndStr())
 		c.Assert(h.Patterns[0].Match, qt.Equals, true)
 
 		h, w = neww()
-		fmt.Fprintf(w, rndStr()+"abc __moo bar")
+		fmt.Fprint(w, rndStr()+"abc __moo bar")
 		c.Assert(h.Patterns[0].Match, qt.Equals, false)
 	}
 

common/hugio/readers.go

@@ -74,13 +74,13 @@ type StringReader interface {
 	ReadString() string
 }
 
-// NewReadSeekerNoOpCloserFromString uses strings.NewReader to create a new ReadSeekerNoOpCloser
+// NewReadSeekerNoOpCloserFromBytes uses bytes.NewReader to create a new ReadSeekerNoOpCloser
 // from the given bytes slice.
 func NewReadSeekerNoOpCloserFromBytes(content []byte) readSeekerNopCloser {
 	return readSeekerNopCloser{bytes.NewReader(content)}
 }
 
-// NewReadSeekCloser creates a new ReadSeekCloser from the given ReadSeeker.
+// NewOpenReadSeekCloser creates a new ReadSeekCloser from the given ReadSeeker.
 // The ReadSeeker will be seeked to the beginning before returned.
 func NewOpenReadSeekCloser(r ReadSeekCloser) OpenReadSeekCloser {
 	return func() (ReadSeekCloser, error) {

common/hugo/hugo.go

@@ -25,14 +25,13 @@ import (
 	"sync"
 	"time"
 
-	godartsassv1 "github.com/bep/godartsass"
 	"github.com/bep/logg"
-	"github.com/mitchellh/mapstructure"
 
 	"github.com/bep/godartsass/v2"
 	"github.com/gohugoio/hugo/common/hcontext"
 	"github.com/gohugoio/hugo/common/hexec"
 	"github.com/gohugoio/hugo/common/loggers"
+	"github.com/gohugoio/hugo/common/maps"
 	"github.com/gohugoio/hugo/hugofs/files"
 
 	"github.com/spf13/afero"
@@ -55,6 +54,8 @@ var (
 	vendorInfo string
 )
 
+var _ maps.StoreProvider = (*HugoInfo)(nil)
+
 // HugoInfo contains information about the current Hugo environment
 type HugoInfo struct {
 	CommitHash string
@@ -72,6 +73,8 @@ type HugoInfo struct {
 	conf ConfigProvider
 	deps []*Dependency
 
+	store *maps.Scratch
+
 	// Context gives access to some of the context scoped variables.
 	Context Context
 }
@@ -116,6 +119,10 @@ func (i HugoInfo) Deps() []*Dependency {
 	return i.deps
 }
 
+func (i HugoInfo) Store() *maps.Scratch {
+	return i.store
+}
+
 // Deprecated: Use hugo.IsMultihost instead.
 func (i HugoInfo) IsMultiHost() bool {
 	Deprecate("hugo.IsMultiHost", "Use hugo.IsMultihost instead.", "v0.124.0")
@@ -132,9 +139,13 @@ func (i HugoInfo) IsMultilingual() bool {
 	return i.conf.IsMultilingual()
 }
 
-type contextKey string
+type contextKey uint8
 
-var markupScope = hcontext.NewContextDispatcher[string](contextKey("markupScope"))
+const (
+	contextKeyMarkupScope contextKey = iota
+)
+
+var markupScope = hcontext.NewContextDispatcher[string](contextKeyMarkupScope)
 
 type Context struct{}
 
@@ -185,6 +196,7 @@ func NewInfo(conf ConfigProvider, deps []*Dependency) HugoInfo {
 		Environment: conf.Environment(),
 		conf:        conf,
 		deps:        deps,
+		store:       maps.NewScratch(),
 		GoVersion:   goVersion,
 	}
 }
@@ -308,7 +320,7 @@ func GetDependencyListNonGo() []string {
 
 	if dartSass := dartSassVersion(); dartSass.ProtocolVersion != "" {
 		dartSassPath := "github.com/sass/dart-sass-embedded"
-		if IsDartSassV2() {
+		if IsDartSassGeV2() {
 			dartSassPath = "github.com/sass/dart-sass"
 		}
 		deps = append(deps,
@@ -355,22 +367,15 @@ type Dependency struct {
 }
 
 func dartSassVersion() godartsass.DartSassVersion {
-	if DartSassBinaryName == "" {
+	if DartSassBinaryName == "" || !IsDartSassGeV2() {
 		return godartsass.DartSassVersion{}
 	}
-	if IsDartSassV2() {
+	v, _ := godartsass.Version(DartSassBinaryName)
-		v, _ := godartsass.Version(DartSassBinaryName)
+	return v
-		return v
-	}
-
-	v, _ := godartsassv1.Version(DartSassBinaryName)
-	var vv godartsass.DartSassVersion
-	mapstructure.WeakDecode(v, &vv)
-	return vv
 }
 
 // DartSassBinaryName is the name of the Dart Sass binary to use.
-// TODO(beop) find a better place for this.
+// TODO(bep) find a better place for this.
 var DartSassBinaryName string
 
 func init() {
@@ -395,7 +400,10 @@ var (
 	dartSassBinaryNamesV2 = []string{"dart-sass", "sass"}
 )
 
-func IsDartSassV2() bool {
+// TODO(bep) we eventually want to remove this, but keep it for a while to throw an informative error.
+// We stopped supporting the old binary in Hugo 0.139.0.
+func IsDartSassGeV2() bool {
+	// dart-sass-embedded was the first version of the embedded Dart Sass before it was moved into the main project.
 	return !strings.Contains(DartSassBinaryName, "embedded")
 }
 
@@ -407,22 +415,39 @@ func IsDartSassV2() bool {
 // 2. Their theme to work for at least the last few Hugo versions.
 func Deprecate(item, alternative string, version string) {
 	level := deprecationLogLevelFromVersion(version)
-	DeprecateLevel(item, alternative, version, level)
+	deprecateLevel(item, alternative, version, level)
+}
+
+// See Deprecate for details.
+func DeprecateWithLogger(item, alternative string, version string, log logg.Logger) {
+	level := deprecationLogLevelFromVersion(version)
+	deprecateLevelWithLogger(item, alternative, version, level, log)
+}
+
+// DeprecateLevelMin informs about a deprecation starting at the given version, but with a minimum log level.
+func DeprecateLevelMin(item, alternative string, version string, minLevel logg.Level) {
+	level := max(deprecationLogLevelFromVersion(version), minLevel)
+	deprecateLevel(item, alternative, version, level)
+}
+
+// deprecateLevel informs about a deprecation logging at the given level.
+func deprecateLevel(item, alternative, version string, level logg.Level) {
+	deprecateLevelWithLogger(item, alternative, version, level, loggers.Log().Logger())
 }
 
 // DeprecateLevel informs about a deprecation logging at the given level.
-func DeprecateLevel(item, alternative, version string, level logg.Level) {
+func deprecateLevelWithLogger(item, alternative, version string, level logg.Level, log logg.Logger) {
 	var msg string
 	if level == logg.LevelError {
-		msg = fmt.Sprintf("%s was deprecated in Hugo %s and will be removed in Hugo %s. %s", item, version, CurrentVersion.Next().ReleaseVersion(), alternative)
+		msg = fmt.Sprintf("%s was deprecated in Hugo %s and subsequently removed. %s", item, version, alternative)
 	} else {
 		msg = fmt.Sprintf("%s was deprecated in Hugo %s and will be removed in a future release. %s", item, version, alternative)
 	}
 
-	loggers.Log().Logger().WithLevel(level).WithField(loggers.FieldNameCmd, "deprecated").Logf(msg)
+	log.WithLevel(level).WithField(loggers.FieldNameCmd, "deprecated").Logf("%s", msg)
 }
 
-// We ususally do about one minor version a month.
+// We usually do about one minor version a month.
 // We want people to run at least the current and previous version without any warnings.
 // We want people who don't update Hugo that often to see the warnings and errors before we remove the feature.
 func deprecationLogLevelFromVersion(ver string) logg.Level {
@@ -430,11 +455,11 @@ func deprecationLogLevelFromVersion(ver string) logg.Level {
 	to := CurrentVersion
 	minorDiff := to.Minor - from.Minor
 	switch {
-	case minorDiff >= 12:
+	case minorDiff >= 15:
-		// Start failing the build after about a year.
+		// Start failing the build after about 15 months.
 		return logg.LevelError
-	case minorDiff >= 6:
+	case minorDiff >= 3:
-		// Start printing warnings after about six months.
+		// Start printing warnings after about 3 months.
 		return logg.LevelWarn
 	default:
 		return logg.LevelInfo

common/hugo/hugo_test.go

@@ -57,12 +57,16 @@ func TestDeprecationLogLevelFromVersion(t *testing.T) {
 	c.Assert(deprecationLogLevelFromVersion("0.55.0"), qt.Equals, logg.LevelError)
 	ver := CurrentVersion
 	c.Assert(deprecationLogLevelFromVersion(ver.String()), qt.Equals, logg.LevelInfo)
-	ver.Minor -= 1
+	ver.Minor -= 3
-	c.Assert(deprecationLogLevelFromVersion(ver.String()), qt.Equals, logg.LevelInfo)
-	ver.Minor -= 6
 	c.Assert(deprecationLogLevelFromVersion(ver.String()), qt.Equals, logg.LevelWarn)
-	ver.Minor -= 6
+	ver.Minor -= 4
+	c.Assert(deprecationLogLevelFromVersion(ver.String()), qt.Equals, logg.LevelWarn)
+	ver.Minor -= 13
 	c.Assert(deprecationLogLevelFromVersion(ver.String()), qt.Equals, logg.LevelError)
+
+	// Added just to find the threshold for where we can remove deprecated items.
+	// Subtract 5 from the minor version of the first ERRORed version => 0.122.0.
+	c.Assert(deprecationLogLevelFromVersion("0.127.0"), qt.Equals, logg.LevelError)
 }
 
 func TestMarkupScope(t *testing.T) {

common/hugo/vars_extended.go

@@ -12,7 +12,6 @@
 // limitations under the License.
 
 //go:build extended
-// +build extended
 
 package hugo
 

common/hugo/vars_regular.go

@@ -12,7 +12,6 @@
 // limitations under the License.
 
 //go:build !extended
-// +build !extended
 
 package hugo
 

common/hugo/vars_withdeploy.go

@@ -1,4 +1,4 @@
-// Copyright 2020 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,4 +11,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package js
+//go:build withdeploy
+
+package hugo
+
+var IsWithdeploy = true

common/hugo/vars_withdeploy_off.go

@@ -1,4 +1,4 @@
-// Copyright 2019 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,4 +11,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package tplimpl
+//go:build !withdeploy
+
+package hugo
+
+var IsWithdeploy = false

common/hugo/version.go

@@ -152,6 +152,9 @@ func BuildVersionString() string {
 	if IsExtended {
 		version += "+extended"
 	}
+	if IsWithdeploy {
+		version += "+withdeploy"
+	}
 
 	osArch := bi.GoOS + "/" + bi.GoArch
 

common/hugo/version_current.go

@@ -17,7 +17,7 @@ package hugo
 // This should be the only one.
 var CurrentVersion = Version{
 	Major:      0,
-	Minor:      134,
+	Minor:      148,
 	PatchLevel: 0,
-	Suffix:     "",
+	Suffix:     "-DEV",
 }

common/loggers/handlerterminal.go

@@ -18,18 +18,19 @@ package loggers
 import (
 	"fmt"
 	"io"
+	"regexp"
 	"strings"
 	"sync"
 
 	"github.com/bep/logg"
 )
 
-// newNoColoursHandler creates a new NoColoursHandler
+// newNoAnsiEscapeHandler creates a new noAnsiEscapeHandler
-func newNoColoursHandler(outWriter, errWriter io.Writer, noLevelPrefix bool, predicate func(*logg.Entry) bool) *noColoursHandler {
+func newNoAnsiEscapeHandler(outWriter, errWriter io.Writer, noLevelPrefix bool, predicate func(*logg.Entry) bool) *noAnsiEscapeHandler {
 	if predicate == nil {
 		predicate = func(e *logg.Entry) bool { return true }
 	}
-	return &noColoursHandler{
+	return &noAnsiEscapeHandler{
 		noLevelPrefix: noLevelPrefix,
 		outWriter:     outWriter,
 		errWriter:     errWriter,
@@ -37,15 +38,15 @@ func newNoColoursHandler(outWriter, errWriter io.Writer, noLevelPrefix bool, pre
 	}
 }
 
-type noColoursHandler struct {
+type noAnsiEscapeHandler struct {
 	mu            sync.Mutex
-	outWriter     io.Writer // Defaults to os.Stdout.
+	outWriter     io.Writer
-	errWriter     io.Writer // Defaults to os.Stderr.
+	errWriter     io.Writer
 	predicate     func(*logg.Entry) bool
 	noLevelPrefix bool
 }
 
-func (h *noColoursHandler) HandleLog(e *logg.Entry) error {
+func (h *noAnsiEscapeHandler) HandleLog(e *logg.Entry) error {
 	if !h.predicate(e) {
 		return nil
 	}
@@ -71,10 +72,12 @@ func (h *noColoursHandler) HandleLog(e *logg.Entry) error {
 		prefix = prefix + ": "
 	}
 
+	msg := stripANSI(e.Message)
+
 	if h.noLevelPrefix {
-		fmt.Fprintf(w, "%s%s", prefix, e.Message)
+		fmt.Fprintf(w, "%s%s", prefix, msg)
 	} else {
-		fmt.Fprintf(w, "%s %s%s", levelString[e.Level], prefix, e.Message)
+		fmt.Fprintf(w, "%s %s%s", levelString[e.Level], prefix, msg)
 	}
 
 	for _, field := range e.Fields {
@@ -88,3 +91,10 @@ func (h *noColoursHandler) HandleLog(e *logg.Entry) error {
 
 	return nil
 }
+
+var ansiRe = regexp.MustCompile(`\x1b\[[0-9;]*m`)
+
+// stripANSI removes ANSI escape codes from s.
+func stripANSI(s string) string {
+	return ansiRe.ReplaceAllString(s, "")
+}

common/loggers/handlerterminal_test.go

@@ -0,0 +1,40 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+// Some functions in this file (see comments) is based on the Go source code,
+// copyright The Go Authors and  governed by a BSD-style license.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package loggers
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/bep/logg"
+	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/common/terminal"
+)
+
+func TestNoAnsiEscapeHandler(t *testing.T) {
+	c := qt.New(t)
+
+	test := func(s string) {
+		c.Assert(stripANSI(terminal.Notice(s)), qt.Equals, s)
+	}
+	test(`error in "file.md:1:2"`)
+
+	var buf bytes.Buffer
+	h := newNoAnsiEscapeHandler(&buf, &buf, false, nil)
+	h.HandleLog(&logg.Entry{Message: terminal.Notice(`error in "file.md:1:2"`), Level: logg.LevelInfo})
+
+	c.Assert(buf.String(), qt.Equals, "INFO  error in \"file.md:1:2\"\n")
+}

common/loggers/logger.go

@@ -38,8 +38,8 @@ var (
 // Options defines options for the logger.
 type Options struct {
 	Level              logg.Level
-	Stdout             io.Writer
+	StdOut             io.Writer
-	Stderr             io.Writer
+	StdErr             io.Writer
 	DistinctLevel      logg.Level
 	StoreErrors        bool
 	HandlerPost        func(e *logg.Entry) error
@@ -48,21 +48,22 @@ type Options struct {
 
 // New creates a new logger with the given options.
 func New(opts Options) Logger {
-	if opts.Stdout == nil {
+	if opts.StdOut == nil {
-		opts.Stdout = os.Stdout
+		opts.StdOut = os.Stdout
 	}
-	if opts.Stderr == nil {
+	if opts.StdErr == nil {
-		opts.Stderr = os.Stdout
+		opts.StdErr = os.Stderr
 	}
+
 	if opts.Level == 0 {
 		opts.Level = logg.LevelWarn
 	}
 
 	var logHandler logg.Handler
-	if terminal.PrintANSIColors(os.Stdout) {
+	if terminal.PrintANSIColors(os.Stderr) {
-		logHandler = newDefaultHandler(opts.Stdout, opts.Stderr)
+		logHandler = newDefaultHandler(opts.StdErr, opts.StdErr)
 	} else {
-		logHandler = newNoColoursHandler(opts.Stdout, opts.Stderr, false, nil)
+		logHandler = newNoAnsiEscapeHandler(opts.StdErr, opts.StdErr, false, nil)
 	}
 
 	errorsw := &strings.Builder{}
@@ -95,7 +96,7 @@ func New(opts Options) Logger {
 	}
 
 	if opts.StoreErrors {
-		h := newNoColoursHandler(io.Discard, errorsw, true, func(e *logg.Entry) bool {
+		h := newNoAnsiEscapeHandler(io.Discard, errorsw, true, func(e *logg.Entry) bool {
 			return e.Level >= logg.LevelError
 		})
 
@@ -137,7 +138,8 @@ func New(opts Options) Logger {
 		logCounters: logCounters,
 		errors:      errorsw,
 		reset:       reset,
-		out:         opts.Stdout,
+		stdOut:      opts.StdOut,
+		stdErr:      opts.StdErr,
 		level:       opts.Level,
 		logger:      logger,
 		tracel:      l.WithLevel(logg.LevelTrace),
@@ -153,8 +155,6 @@ func NewDefault() Logger {
 	opts := Options{
 		DistinctLevel: logg.LevelWarn,
 		Level:         logg.LevelWarn,
-		Stdout:        os.Stdout,
-		Stderr:        os.Stdout,
 	}
 	return New(opts)
 }
@@ -163,8 +163,6 @@ func NewTrace() Logger {
 	opts := Options{
 		DistinctLevel: logg.LevelWarn,
 		Level:         logg.LevelTrace,
-		Stdout:        os.Stdout,
-		Stderr:        os.Stdout,
 	}
 	return New(opts)
 }
@@ -189,7 +187,8 @@ type Logger interface {
 	Level() logg.Level
 	LoggCount(logg.Level) int
 	Logger() logg.Logger
-	Out() io.Writer
+	StdOut() io.Writer
+	StdErr() io.Writer
 	Printf(format string, v ...any)
 	Println(v ...any)
 	PrintTimerIfDelayed(start time.Time, name string)
@@ -207,7 +206,8 @@ type logAdapter struct {
 	logCounters *logLevelCounter
 	errors      *strings.Builder
 	reset       func()
-	out         io.Writer
+	stdOut      io.Writer
+	stdErr      io.Writer
 	level       logg.Level
 	logger      logg.Logger
 	tracel      logg.LevelLogger
@@ -259,8 +259,12 @@ func (l *logAdapter) Logger() logg.Logger {
 	return l.logger
 }
 
-func (l *logAdapter) Out() io.Writer {
+func (l *logAdapter) StdOut() io.Writer {
-	return l.out
+	return l.stdOut
+}
+
+func (l *logAdapter) StdErr() io.Writer {
+	return l.stdErr
 }
 
 // PrintTimerIfDelayed prints a time statement to the FEEDBACK logger
@@ -271,7 +275,7 @@ func (l *logAdapter) PrintTimerIfDelayed(start time.Time, name string) {
 	if milli < 500 {
 		return
 	}
-	l.Printf("%s in %v ms", name, milli)
+	fmt.Fprintf(l.stdErr, "%s in %v ms", name, milli)
 }
 
 func (l *logAdapter) Printf(format string, v ...any) {
@@ -279,11 +283,11 @@ func (l *logAdapter) Printf(format string, v ...any) {
 	if !strings.HasSuffix(format, "\n") {
 		format += "\n"
 	}
-	fmt.Fprintf(l.out, format, v...)
+	fmt.Fprintf(l.stdOut, format, v...)
 }
 
 func (l *logAdapter) Println(v ...any) {
-	fmt.Fprintln(l.out, v...)
+	fmt.Fprintln(l.stdOut, v...)
 }
 
 func (l *logAdapter) Reset() {

common/loggers/logger_test.go

@@ -31,13 +31,13 @@ func TestLogDistinct(t *testing.T) {
 	opts := loggers.Options{
 		DistinctLevel: logg.LevelWarn,
 		StoreErrors:   true,
-		Stdout:        io.Discard,
+		StdOut:        io.Discard,
-		Stderr:        io.Discard,
+		StdErr:        io.Discard,
 	}
 
 	l := loggers.New(opts)
 
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		l.Errorln("error 1")
 		l.Errorln("error 2")
 		l.Warnln("warn 1")
@@ -54,8 +54,8 @@ func TestHookLast(t *testing.T) {
 		HandlerPost: func(e *logg.Entry) error {
 			panic(e.Message)
 		},
-		Stdout: io.Discard,
+		StdOut: io.Discard,
-		Stderr: io.Discard,
+		StdErr: io.Discard,
 	}
 
 	l := loggers.New(opts)
@@ -70,8 +70,8 @@ func TestOptionStoreErrors(t *testing.T) {
 
 	opts := loggers.Options{
 		StoreErrors: true,
-		Stderr:      &sb,
+		StdErr:      &sb,
-		Stdout:      &sb,
+		StdOut:      &sb,
 	}
 
 	l := loggers.New(opts)
@@ -131,13 +131,13 @@ func TestReset(t *testing.T) {
 	opts := loggers.Options{
 		StoreErrors:   true,
 		DistinctLevel: logg.LevelWarn,
-		Stdout:        io.Discard,
+		StdOut:        io.Discard,
-		Stderr:        io.Discard,
+		StdErr:        io.Discard,
 	}
 
 	l := loggers.New(opts)
 
-	for i := 0; i < 3; i++ {
+	for range 3 {
 		l.Errorln("error 1")
 		l.Errorln("error 2")
 		l.Errorln("error 1")

common/loggers/loggerglobal.go

@@ -21,7 +21,15 @@ import (
 	"github.com/bep/logg"
 )
 
-func InitGlobalLogger(level logg.Level, panicOnWarnings bool) {
+// SetGlobalLogger sets the global logger.
+// This is used in a few places in Hugo, e.g. deprecated functions.
+func SetGlobalLogger(logger Logger) {
+	logMu.Lock()
+	defer logMu.Unlock()
+	log = logger
+}
+
+func initGlobalLogger(level logg.Level, panicOnWarnings bool) {
 	logMu.Lock()
 	defer logMu.Unlock()
 	var logHookLast func(e *logg.Entry) error
@@ -50,5 +58,5 @@ func Log() Logger {
 var log Logger
 
 func init() {
-	InitGlobalLogger(logg.LevelWarn, false)
+	initGlobalLogger(logg.LevelWarn, false)
 }

common/maps/cache.go

@@ -13,11 +13,14 @@
 
 package maps
 
-import "sync"
+import (
+	"sync"
+)
 
 // Cache is a simple thread safe cache backed by a map.
 type Cache[K comparable, T any] struct {
-	m map[K]T
+	m                  map[K]T
+	hasBeenInitialized bool
 	sync.RWMutex
 }
 
@@ -34,11 +37,16 @@ func (c *Cache[K, T]) Get(key K) (T, bool) {
 		return zero, false
 	}
 	c.RLock()
-	v, found := c.m[key]
+	v, found := c.get(key)
 	c.RUnlock()
 	return v, found
 }
 
+func (c *Cache[K, T]) get(key K) (T, bool) {
+	v, found := c.m[key]
+	return v, found
+}
+
 // GetOrCreate gets the value for the given key if it exists, or creates it if not.
 func (c *Cache[K, T]) GetOrCreate(key K, create func() (T, error)) (T, error) {
 	c.RLock()
@@ -61,19 +69,77 @@ func (c *Cache[K, T]) GetOrCreate(key K, create func() (T, error)) (T, error) {
 	return v, nil
 }
 
+// Contains returns whether the given key exists in the cache.
+func (c *Cache[K, T]) Contains(key K) bool {
+	c.RLock()
+	_, found := c.m[key]
+	c.RUnlock()
+	return found
+}
+
+// InitAndGet initializes the cache if not already done and returns the value for the given key.
+// The init state will be reset on Reset or Drain.
+func (c *Cache[K, T]) InitAndGet(key K, init func(get func(key K) (T, bool), set func(key K, value T)) error) (T, error) {
+	var v T
+	c.RLock()
+	if !c.hasBeenInitialized {
+		c.RUnlock()
+		if err := func() error {
+			c.Lock()
+			defer c.Unlock()
+			// Double check in case another goroutine has initialized it in the meantime.
+			if !c.hasBeenInitialized {
+				err := init(c.get, c.set)
+				if err != nil {
+					return err
+				}
+				c.hasBeenInitialized = true
+			}
+			return nil
+		}(); err != nil {
+			return v, err
+		}
+		// Reacquire the read lock.
+		c.RLock()
+	}
+
+	v = c.m[key]
+	c.RUnlock()
+
+	return v, nil
+}
+
 // Set sets the given key to the given value.
 func (c *Cache[K, T]) Set(key K, value T) {
 	c.Lock()
-	c.m[key] = value
+	c.set(key, value)
 	c.Unlock()
 }
 
+// SetIfAbsent sets the given key to the given value if the key does not already exist in the cache.
+func (c *Cache[K, T]) SetIfAbsent(key K, value T) {
+	c.RLock()
+	if _, found := c.get(key); !found {
+		c.RUnlock()
+		c.Set(key, value)
+	} else {
+		c.RUnlock()
+	}
+}
+
+func (c *Cache[K, T]) set(key K, value T) {
+	c.m[key] = value
+}
+
 // ForEeach calls the given function for each key/value pair in the cache.
-func (c *Cache[K, T]) ForEeach(f func(K, T)) {
+// If the function returns false, the iteration stops.
+func (c *Cache[K, T]) ForEeach(f func(K, T) bool) {
 	c.RLock()
 	defer c.RUnlock()
 	for k, v := range c.m {
-		f(k, v)
+		if !f(k, v) {
+			return
+		}
 	}
 }
 
@@ -81,6 +147,7 @@ func (c *Cache[K, T]) Drain() map[K]T {
 	c.Lock()
 	m := c.m
 	c.m = make(map[K]T)
+	c.hasBeenInitialized = false
 	c.Unlock()
 	return m
 }
@@ -93,7 +160,8 @@ func (c *Cache[K, T]) Len() int {
 
 func (c *Cache[K, T]) Reset() {
 	c.Lock()
-	c.m = make(map[K]T)
+	clear(c.m)
+	c.hasBeenInitialized = false
 	c.Unlock()
 }
 

common/maps/maps_test.go

@@ -73,10 +73,14 @@ func TestPrepareParams(t *testing.T) {
 	for i, test := range tests {
 		t.Run(fmt.Sprint(i), func(t *testing.T) {
 			// PrepareParams modifies input.
+			prepareClone := PrepareParamsClone(test.input)
 			PrepareParams(test.input)
 			if !reflect.DeepEqual(test.expected, test.input) {
 				t.Errorf("[%d] Expected\n%#v, got\n%#v\n", i, test.expected, test.input)
 			}
+			if !reflect.DeepEqual(test.expected, prepareClone) {
+				t.Errorf("[%d] Expected\n%#v, got\n%#v\n", i, test.expected, prepareClone)
+			}
 		})
 	}
 }

common/maps/ordered.go

@@ -0,0 +1,144 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package maps
+
+import (
+	"slices"
+
+	"github.com/gohugoio/hugo/common/hashing"
+)
+
+// Ordered is a map that can be iterated in the order of insertion.
+// Note that insertion order is not affected if a key is re-inserted into the map.
+// In a nil map, all operations are no-ops.
+// This is not thread safe.
+type Ordered[K comparable, T any] struct {
+	// The keys in the order they were added.
+	keys []K
+	// The values.
+	values map[K]T
+}
+
+// NewOrdered creates a new Ordered map.
+func NewOrdered[K comparable, T any]() *Ordered[K, T] {
+	return &Ordered[K, T]{values: make(map[K]T)}
+}
+
+// Set sets the value for the given key.
+// Note that insertion order is not affected if a key is re-inserted into the map.
+func (m *Ordered[K, T]) Set(key K, value T) {
+	if m == nil {
+		return
+	}
+	// Check if key already exists.
+	if _, found := m.values[key]; !found {
+		m.keys = append(m.keys, key)
+	}
+	m.values[key] = value
+}
+
+// Get gets the value for the given key.
+func (m *Ordered[K, T]) Get(key K) (T, bool) {
+	if m == nil {
+		var v T
+		return v, false
+	}
+	value, found := m.values[key]
+	return value, found
+}
+
+// Has returns whether the given key exists in the map.
+func (m *Ordered[K, T]) Has(key K) bool {
+	if m == nil {
+		return false
+	}
+	_, found := m.values[key]
+	return found
+}
+
+// Delete deletes the value for the given key.
+func (m *Ordered[K, T]) Delete(key K) {
+	if m == nil {
+		return
+	}
+	delete(m.values, key)
+	for i, k := range m.keys {
+		if k == key {
+			m.keys = slices.Delete(m.keys, i, i+1)
+			break
+		}
+	}
+}
+
+// Clone creates a shallow copy of the map.
+func (m *Ordered[K, T]) Clone() *Ordered[K, T] {
+	if m == nil {
+		return nil
+	}
+	clone := NewOrdered[K, T]()
+	for _, k := range m.keys {
+		clone.Set(k, m.values[k])
+	}
+	return clone
+}
+
+// Keys returns the keys in the order they were added.
+func (m *Ordered[K, T]) Keys() []K {
+	if m == nil {
+		return nil
+	}
+	return m.keys
+}
+
+// Values returns the values in the order they were added.
+func (m *Ordered[K, T]) Values() []T {
+	if m == nil {
+		return nil
+	}
+	var values []T
+	for _, k := range m.keys {
+		values = append(values, m.values[k])
+	}
+	return values
+}
+
+// Len returns the number of items in the map.
+func (m *Ordered[K, T]) Len() int {
+	if m == nil {
+		return 0
+	}
+	return len(m.keys)
+}
+
+// Range calls f sequentially for each key and value present in the map.
+// If f returns false, range stops the iteration.
+// TODO(bep) replace with iter.Seq2 when we bump go Go 1.24.
+func (m *Ordered[K, T]) Range(f func(key K, value T) bool) {
+	if m == nil {
+		return
+	}
+	for _, k := range m.keys {
+		if !f(k, m.values[k]) {
+			return
+		}
+	}
+}
+
+// Hash calculates a hash from the values.
+func (m *Ordered[K, T]) Hash() (uint64, error) {
+	if m == nil {
+		return 0, nil
+	}
+	return hashing.Hash(m.values)
+}

common/maps/ordered_test.go

@@ -0,0 +1,99 @@
+// Copyright 2024 The Hugo Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package maps
+
+import (
+	"testing"
+
+	qt "github.com/frankban/quicktest"
+)
+
+func TestOrdered(t *testing.T) {
+	c := qt.New(t)
+
+	m := NewOrdered[string, int]()
+	m.Set("a", 1)
+	m.Set("b", 2)
+	m.Set("c", 3)
+
+	c.Assert(m.Keys(), qt.DeepEquals, []string{"a", "b", "c"})
+	c.Assert(m.Values(), qt.DeepEquals, []int{1, 2, 3})
+
+	v, found := m.Get("b")
+	c.Assert(found, qt.Equals, true)
+	c.Assert(v, qt.Equals, 2)
+
+	m.Set("b", 22)
+	c.Assert(m.Keys(), qt.DeepEquals, []string{"a", "b", "c"})
+	c.Assert(m.Values(), qt.DeepEquals, []int{1, 22, 3})
+
+	m.Delete("b")
+
+	c.Assert(m.Keys(), qt.DeepEquals, []string{"a", "c"})
+	c.Assert(m.Values(), qt.DeepEquals, []int{1, 3})
+}
+
+func TestOrderedHash(t *testing.T) {
+	c := qt.New(t)
+
+	m := NewOrdered[string, int]()
+	m.Set("a", 1)
+	m.Set("b", 2)
+	m.Set("c", 3)
+
+	h1, err := m.Hash()
+	c.Assert(err, qt.IsNil)
+
+	m.Set("d", 4)
+
+	h2, err := m.Hash()
+	c.Assert(err, qt.IsNil)
+
+	c.Assert(h1, qt.Not(qt.Equals), h2)
+
+	m = NewOrdered[string, int]()
+	m.Set("b", 2)
+	m.Set("a", 1)
+	m.Set("c", 3)
+
+	h3, err := m.Hash()
+	c.Assert(err, qt.IsNil)
+	// Order does not matter.
+	c.Assert(h1, qt.Equals, h3)
+}
+
+func TestOrderedNil(t *testing.T) {
+	c := qt.New(t)
+
+	var m *Ordered[string, int]
+
+	m.Set("a", 1)
+	c.Assert(m.Keys(), qt.IsNil)
+	c.Assert(m.Values(), qt.IsNil)
+	v, found := m.Get("a")
+	c.Assert(found, qt.Equals, false)
+	c.Assert(v, qt.Equals, 0)
+	m.Delete("a")
+	var b bool
+	m.Range(func(k string, v int) bool {
+		b = true
+		return true
+	})
+	c.Assert(b, qt.Equals, false)
+	c.Assert(m.Len(), qt.Equals, 0)
+	c.Assert(m.Clone(), qt.IsNil)
+	h, err := m.Hash()
+	c.Assert(err, qt.IsNil)
+	c.Assert(h, qt.Equals, uint64(0))
+}

common/maps/params.go

@@ -303,7 +303,7 @@ func toMergeStrategy(v any) ParamsMergeStrategy {
 }
 
 // PrepareParams
-// * makes all the keys in the given map lower cased and will do so
+// * makes all the keys in the given map lower cased and will do so recursively.
 // * This will modify the map given.
 // * Any nested map[interface{}]interface{}, map[string]interface{},map[string]string  will be converted to Params.
 // * Any _merge value will be converted to proper type and value.
@@ -343,3 +343,42 @@ func PrepareParams(m Params) {
 		}
 	}
 }
+
+// PrepareParamsClone is like PrepareParams, but it does not modify the input.
+func PrepareParamsClone(m Params) Params {
+	m2 := make(Params)
+	for k, v := range m {
+		var retyped bool
+		lKey := strings.ToLower(k)
+		if lKey == MergeStrategyKey {
+			v = toMergeStrategy(v)
+			retyped = true
+		} else {
+			switch vv := v.(type) {
+			case map[any]any:
+				var p Params = cast.ToStringMap(v)
+				v = PrepareParamsClone(p)
+				retyped = true
+			case map[string]any:
+				var p Params = v.(map[string]any)
+				v = PrepareParamsClone(p)
+				retyped = true
+			case map[string]string:
+				p := make(Params)
+				for k, v := range vv {
+					p[k] = v
+				}
+				v = p
+				PrepareParams(p)
+				retyped = true
+			}
+		}
+
+		if retyped || k != lKey {
+			m2[lKey] = v
+		} else {
+			m2[k] = v
+		}
+	}
+	return m2
+}

common/maps/scratch.go

@@ -22,31 +22,18 @@ import (
 	"github.com/gohugoio/hugo/common/math"
 )
 
-// Scratch is a writable context used for stateful operations in Page/Node rendering.
+type StoreProvider interface {
+	// Store returns a Scratch that can be used to store temporary state.
+	// Store is not reset on server rebuilds.
+	Store() *Scratch
+}
+
+// Scratch is a writable context used for stateful build operations
 type Scratch struct {
 	values map[string]any
 	mu     sync.RWMutex
 }
 
-// Scratcher provides a scratching service.
-type Scratcher interface {
-	// Scratch returns a "scratch pad" that can be used to store state.
-	Scratch() *Scratch
-}
-
-type scratcher struct {
-	s *Scratch
-}
-
-func (s scratcher) Scratch() *Scratch {
-	return s.s
-}
-
-// NewScratcher creates a new Scratcher.
-func NewScratcher() Scratcher {
-	return scratcher{s: NewScratch()}
-}
-
 // Add will, for single values, add (using the + operator) the addend to the existing addend (if found).
 // Supports numeric values and strings.
 //

common/maps/scratch_test.go

@@ -140,7 +140,7 @@ func TestScratchInParallel(t *testing.T) {
 	for i := 1; i <= 10; i++ {
 		wg.Add(1)
 		go func(j int) {
-			for k := 0; k < 10; k++ {
+			for k := range 10 {
 				newVal := int64(k + j)
 
 				_, err := scratch.Add(key, newVal)
@@ -185,7 +185,7 @@ func TestScratchSetInMap(t *testing.T) {
 	scratch.SetInMap("key", "zyx", "Zyx")
 	scratch.SetInMap("key", "abc", "Abc (updated)")
 	scratch.SetInMap("key", "def", "Def")
-	c.Assert(scratch.GetSortedMapValues("key"), qt.DeepEquals, []any{0: "Abc (updated)", 1: "Def", 2: "Lux", 3: "Zyx"})
+	c.Assert(scratch.GetSortedMapValues("key"), qt.DeepEquals, any([]any{"Abc (updated)", "Def", "Lux", "Zyx"}))
 }
 
 func TestScratchDeleteInMap(t *testing.T) {
@@ -199,7 +199,7 @@ func TestScratchDeleteInMap(t *testing.T) {
 	scratch.DeleteInMap("key", "abc")
 	scratch.SetInMap("key", "def", "Def")
 	scratch.DeleteInMap("key", "lmn") // Do nothing
-	c.Assert(scratch.GetSortedMapValues("key"), qt.DeepEquals, []any{0: "Def", 1: "Lux", 2: "Zyx"})
+	c.Assert(scratch.GetSortedMapValues("key"), qt.DeepEquals, any([]any{"Def", "Lux", "Zyx"}))
 }
 
 func TestScratchGetSortedMapValues(t *testing.T) {

common/math/math.go

@@ -26,29 +26,32 @@ func DoArithmetic(a, b any, op rune) (any, error) {
 	var ai, bi int64
 	var af, bf float64
 	var au, bu uint64
+	var isInt, isFloat, isUint bool
 	switch av.Kind() {
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		ai = av.Int()
 		switch bv.Kind() {
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+			isInt = true
 			bi = bv.Int()
 		case reflect.Float32, reflect.Float64:
+			isFloat = true
 			af = float64(ai) // may overflow
-			ai = 0
 			bf = bv.Float()
 		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
 			bu = bv.Uint()
 			if ai >= 0 {
+				isUint = true
 				au = uint64(ai)
-				ai = 0
 			} else {
+				isInt = true
 				bi = int64(bu) // may overflow
-				bu = 0
 			}
 		default:
 			return nil, errors.New("can't apply the operator to the values")
 		}
 	case reflect.Float32, reflect.Float64:
+		isFloat = true
 		af = av.Float()
 		switch bv.Kind() {
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
@@ -66,17 +69,18 @@ func DoArithmetic(a, b any, op rune) (any, error) {
 		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 			bi = bv.Int()
 			if bi >= 0 {
+				isUint = true
 				bu = uint64(bi)
-				bi = 0
 			} else {
+				isInt = true
 				ai = int64(au) // may overflow
-				au = 0
 			}
 		case reflect.Float32, reflect.Float64:
+			isFloat = true
 			af = float64(au) // may overflow
-			au = 0
 			bf = bv.Float()
 		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			isUint = true
 			bu = bv.Uint()
 		default:
 			return nil, errors.New("can't apply the operator to the values")
@@ -94,38 +98,32 @@ func DoArithmetic(a, b any, op rune) (any, error) {
 
 	switch op {
 	case '+':
-		if ai != 0 || bi != 0 {
+		if isInt {
 			return ai + bi, nil
-		} else if af != 0 || bf != 0 {
+		} else if isFloat {
 			return af + bf, nil
-		} else if au != 0 || bu != 0 {
-			return au + bu, nil
 		}
-		return 0, nil
+		return au + bu, nil
 	case '-':
-		if ai != 0 || bi != 0 {
+		if isInt {
 			return ai - bi, nil
-		} else if af != 0 || bf != 0 {
+		} else if isFloat {
 			return af - bf, nil
-		} else if au != 0 || bu != 0 {
-			return au - bu, nil
 		}
-		return 0, nil
+		return au - bu, nil
 	case '*':
-		if ai != 0 || bi != 0 {
+		if isInt {
 			return ai * bi, nil
-		} else if af != 0 || bf != 0 {
+		} else if isFloat {
 			return af * bf, nil
-		} else if au != 0 || bu != 0 {
-			return au * bu, nil
 		}
-		return 0, nil
+		return au * bu, nil
 	case '/':
-		if bi != 0 {
+		if isInt && bi != 0 {
 			return ai / bi, nil
-		} else if bf != 0 {
+		} else if isFloat && bf != 0 {
 			return af / bf, nil
-		} else if bu != 0 {
+		} else if isUint && bu != 0 {
 			return au / bu, nil
 		}
 		return nil, errors.New("can't divide the value by 0")

common/math/math_test.go

@@ -30,10 +30,12 @@ func TestDoArithmetic(t *testing.T) {
 		expect any
 	}{
 		{3, 2, '+', int64(5)},
+		{0, 0, '+', int64(0)},
 		{3, 2, '-', int64(1)},
 		{3, 2, '*', int64(6)},
 		{3, 2, '/', int64(1)},
 		{3.0, 2, '+', float64(5)},
+		{0.0, 0, '+', float64(0.0)},
 		{3.0, 2, '-', float64(1)},
 		{3.0, 2, '*', float64(6)},
 		{3.0, 2, '/', float64(1.5)},
@@ -42,18 +44,22 @@ func TestDoArithmetic(t *testing.T) {
 		{3, 2.0, '*', float64(6)},
 		{3, 2.0, '/', float64(1.5)},
 		{3.0, 2.0, '+', float64(5)},
+		{0.0, 0.0, '+', float64(0.0)},
 		{3.0, 2.0, '-', float64(1)},
 		{3.0, 2.0, '*', float64(6)},
 		{3.0, 2.0, '/', float64(1.5)},
 		{uint(3), uint(2), '+', uint64(5)},
+		{uint(0), uint(0), '+', uint64(0)},
 		{uint(3), uint(2), '-', uint64(1)},
 		{uint(3), uint(2), '*', uint64(6)},
 		{uint(3), uint(2), '/', uint64(1)},
 		{uint(3), 2, '+', uint64(5)},
+		{uint(0), 0, '+', uint64(0)},
 		{uint(3), 2, '-', uint64(1)},
 		{uint(3), 2, '*', uint64(6)},
 		{uint(3), 2, '/', uint64(1)},
 		{3, uint(2), '+', uint64(5)},
+		{0, uint(0), '+', uint64(0)},
 		{3, uint(2), '-', uint64(1)},
 		{3, uint(2), '*', uint64(6)},
 		{3, uint(2), '/', uint64(1)},
@@ -66,16 +72,15 @@ func TestDoArithmetic(t *testing.T) {
 		{-3, uint(2), '*', int64(-6)},
 		{-3, uint(2), '/', int64(-1)},
 		{uint(3), 2.0, '+', float64(5)},
+		{uint(0), 0.0, '+', float64(0)},
 		{uint(3), 2.0, '-', float64(1)},
 		{uint(3), 2.0, '*', float64(6)},
 		{uint(3), 2.0, '/', float64(1.5)},
 		{3.0, uint(2), '+', float64(5)},
+		{0.0, uint(0), '+', float64(0)},
 		{3.0, uint(2), '-', float64(1)},
 		{3.0, uint(2), '*', float64(6)},
 		{3.0, uint(2), '/', float64(1.5)},
-		{0, 0, '+', 0},
-		{0, 0, '-', 0},
-		{0, 0, '*', 0},
 		{"foo", "bar", '+', "foobar"},
 		{3, 0, '/', false},
 		{3.0, 0, '/', false},

common/para/para_test.go

@@ -42,7 +42,7 @@ func TestPara(t *testing.T) {
 	c.Run("Order", func(c *qt.C) {
 		n := 500
 		ints := make([]int, n)
-		for i := 0; i < n; i++ {
+		for i := range n {
 			ints[i] = i
 		}
 
@@ -51,7 +51,7 @@ func TestPara(t *testing.T) {
 
 		var result []int
 		var mu sync.Mutex
-		for i := 0; i < n; i++ {
+		for i := range n {
 			i := i
 			r.Run(func() error {
 				mu.Lock()
@@ -78,7 +78,7 @@ func TestPara(t *testing.T) {
 
 		var counter int64
 
-		for i := 0; i < n; i++ {
+		for range n {
 			r.Run(func() error {
 				atomic.AddInt64(&counter, 1)
 				time.Sleep(1 * time.Millisecond)

common/paths/pathparser.go

@@ -23,6 +23,11 @@ import (
 	"github.com/gohugoio/hugo/common/types"
 	"github.com/gohugoio/hugo/hugofs/files"
 	"github.com/gohugoio/hugo/identity"
+	"github.com/gohugoio/hugo/resources/kinds"
+)
+
+const (
+	identifierBaseof = "baseof"
 )
 
 // PathParser parses a path into a Path.
@@ -33,6 +38,10 @@ type PathParser struct {
 	// Reports whether the given language is disabled.
 	IsLangDisabled func(string) bool
 
+	// IsOutputFormat reports whether the given name is a valid output format.
+	// The second argument is optional.
+	IsOutputFormat func(name, ext string) bool
+
 	// Reports whether the given ext is a content file.
 	IsContentExt func(string) bool
 }
@@ -83,13 +92,10 @@ func (pp *PathParser) Parse(c, s string) *Path {
 }
 
 func (pp *PathParser) newPath(component string) *Path {
-	return &Path{
+	p := &Path{}
-		component:             component,
+	p.reset()
-		posContainerLow:       -1,
+	p.component = component
-		posContainerHigh:      -1,
+	return p
-		posSectionHigh:        -1,
-		posIdentifierLanguage: -1,
-	}
 }
 
 func (pp *PathParser) parse(component, s string) (*Path, error) {
@@ -114,10 +120,101 @@ func (pp *PathParser) parse(component, s string) (*Path, error) {
 	return p, nil
 }
 
-func (pp *PathParser) doParse(component, s string, p *Path) (*Path, error) {
+func (pp *PathParser) parseIdentifier(component, s string, p *Path, i, lastDot, numDots int, isLast bool) {
-	hasLang := pp.LanguageIndex != nil
+	if p.posContainerHigh != -1 {
-	hasLang = hasLang && (component == files.ComponentFolderContent || component == files.ComponentFolderLayouts)
+		return
+	}
+	mayHaveLang := numDots > 1 && p.posIdentifierLanguage == -1 && pp.LanguageIndex != nil
+	mayHaveLang = mayHaveLang && (component == files.ComponentFolderContent || component == files.ComponentFolderLayouts)
+	mayHaveOutputFormat := component == files.ComponentFolderLayouts
+	mayHaveKind := p.posIdentifierKind == -1 && mayHaveOutputFormat
+	var mayHaveLayout bool
+	if p.pathType == TypeShortcode {
+		mayHaveLayout = !isLast && component == files.ComponentFolderLayouts
+	} else {
+		mayHaveLayout = component == files.ComponentFolderLayouts
+	}
 
+	var found bool
+	var high int
+	if len(p.identifiersKnown) > 0 {
+		high = lastDot
+	} else {
+		high = len(p.s)
+	}
+	id := types.LowHigh[string]{Low: i + 1, High: high}
+	sid := p.s[id.Low:id.High]
+
+	if len(p.identifiersKnown) == 0 {
+		// The first is always the extension.
+		p.identifiersKnown = append(p.identifiersKnown, id)
+		found = true
+
+		// May also be the output format.
+		if mayHaveOutputFormat && pp.IsOutputFormat(sid, "") {
+			p.posIdentifierOutputFormat = 0
+		}
+	} else {
+
+		var langFound bool
+
+		if mayHaveLang {
+			var disabled bool
+			_, langFound = pp.LanguageIndex[sid]
+			if !langFound {
+				disabled = pp.IsLangDisabled != nil && pp.IsLangDisabled(sid)
+				if disabled {
+					p.disabled = true
+					langFound = true
+				}
+			}
+			found = langFound
+			if langFound {
+				p.identifiersKnown = append(p.identifiersKnown, id)
+				p.posIdentifierLanguage = len(p.identifiersKnown) - 1
+			}
+		}
+
+		if !found && mayHaveOutputFormat {
+			// At this point we may already have resolved an output format,
+			// but we need to keep looking for a more specific one, e.g. amp before html.
+			// Use both name and extension to prevent
+			// false positives on the form css.html.
+			if pp.IsOutputFormat(sid, p.Ext()) {
+				found = true
+				p.identifiersKnown = append(p.identifiersKnown, id)
+				p.posIdentifierOutputFormat = len(p.identifiersKnown) - 1
+			}
+		}
+
+		if !found && mayHaveKind {
+			if kinds.GetKindMain(sid) != "" {
+				found = true
+				p.identifiersKnown = append(p.identifiersKnown, id)
+				p.posIdentifierKind = len(p.identifiersKnown) - 1
+			}
+		}
+
+		if !found && sid == identifierBaseof {
+			found = true
+			p.identifiersKnown = append(p.identifiersKnown, id)
+			p.posIdentifierBaseof = len(p.identifiersKnown) - 1
+		}
+
+		if !found && mayHaveLayout {
+			p.identifiersKnown = append(p.identifiersKnown, id)
+			p.posIdentifierLayout = len(p.identifiersKnown) - 1
+			found = true
+		}
+
+		if !found {
+			p.identifiersUnknown = append(p.identifiersUnknown, id)
+		}
+
+	}
+}
+
+func (pp *PathParser) doParse(component, s string, p *Path) (*Path, error) {
 	if runtime.GOOS == "windows" {
 		s = path.Clean(filepath.ToSlash(s))
 		if s == "." {
@@ -140,46 +237,26 @@ func (pp *PathParser) doParse(component, s string, p *Path) (*Path, error) {
 
 	p.s = s
 	slashCount := 0
+	lastDot := 0
+	lastSlashIdx := strings.LastIndex(s, "/")
+	numDots := strings.Count(s[lastSlashIdx+1:], ".")
+	if strings.Contains(s, "/_shortcodes/") {
+		p.pathType = TypeShortcode
+	}
 
 	for i := len(s) - 1; i >= 0; i-- {
 		c := s[i]
 
 		switch c {
 		case '.':
-			if p.posContainerHigh == -1 {
+			pp.parseIdentifier(component, s, p, i, lastDot, numDots, false)
-				var high int
+			lastDot = i
-				if len(p.identifiers) > 0 {
-					high = p.identifiers[len(p.identifiers)-1].Low - 1
-				} else {
-					high = len(p.s)
-				}
-				id := types.LowHigh[string]{Low: i + 1, High: high}
-				if len(p.identifiers) == 0 {
-					p.identifiers = append(p.identifiers, id)
-				} else if len(p.identifiers) == 1 {
-					// Check for a valid language.
-					s := p.s[id.Low:id.High]
-
-					if hasLang {
-						var disabled bool
-						_, langFound := pp.LanguageIndex[s]
-						if !langFound {
-							disabled = pp.IsLangDisabled != nil && pp.IsLangDisabled(s)
-							if disabled {
-								p.disabled = true
-								langFound = true
-							}
-						}
-						if langFound {
-							p.posIdentifierLanguage = 1
-							p.identifiers = append(p.identifiers, id)
-						}
-					}
-				}
-			}
 		case '/':
 			slashCount++
 			if p.posContainerHigh == -1 {
+				if lastDot > 0 {
+					pp.parseIdentifier(component, s, p, i, lastDot, numDots, true)
+				}
 				p.posContainerHigh = i + 1
 			} else if p.posContainerLow == -1 {
 				p.posContainerLow = i + 1
@@ -190,26 +267,52 @@ func (pp *PathParser) doParse(component, s string, p *Path) (*Path, error) {
 		}
 	}
 
-	if len(p.identifiers) > 0 {
+	if len(p.identifiersKnown) > 0 {
 		isContentComponent := p.component == files.ComponentFolderContent || p.component == files.ComponentFolderArchetypes
 		isContent := isContentComponent && pp.IsContentExt(p.Ext())
-		id := p.identifiers[len(p.identifiers)-1]
+		id := p.identifiersKnown[len(p.identifiersKnown)-1]
-		b := p.s[p.posContainerHigh : id.Low-1]
-		if isContent {
-			switch b {
-			case "index":
-				p.bundleType = PathTypeLeaf
-			case "_index":
-				p.bundleType = PathTypeBranch
-			default:
-				p.bundleType = PathTypeContentSingle
-			}
 
-			if slashCount == 2 && p.IsLeafBundle() {
+		if id.Low > p.posContainerHigh {
-				p.posSectionHigh = 0
+			b := p.s[p.posContainerHigh : id.Low-1]
+			if isContent {
+				switch b {
+				case "index":
+					p.pathType = TypeLeaf
+				case "_index":
+					p.pathType = TypeBranch
+				default:
+					p.pathType = TypeContentSingle
+				}
+
+				if slashCount == 2 && p.IsLeafBundle() {
+					p.posSectionHigh = 0
+				}
+			} else if b == files.NameContentData && files.IsContentDataExt(p.Ext()) {
+				p.pathType = TypeContentData
 			}
-		} else if b == files.NameContentData && files.IsContentDataExt(p.Ext()) {
+		}
-			p.bundleType = PathTypeContentData
+	}
+
+	if p.pathType < TypeMarkup && component == files.ComponentFolderLayouts {
+		if p.posIdentifierBaseof != -1 {
+			p.pathType = TypeBaseof
+		} else {
+			pth := p.Path()
+			if strings.Contains(pth, "/_shortcodes/") {
+				p.pathType = TypeShortcode
+			} else if strings.Contains(pth, "/_markup/") {
+				p.pathType = TypeMarkup
+			} else if strings.HasPrefix(pth, "/_partials/") {
+				p.pathType = TypePartial
+			}
+		}
+	}
+
+	if p.pathType == TypeShortcode && p.posIdentifierLayout != -1 {
+		id := p.identifiersKnown[p.posIdentifierLayout]
+		if id.Low == p.posContainerHigh {
+			// First identifier is shortcode name.
+			p.posIdentifierLayout = -1
 		}
 	}
 
@@ -218,35 +321,44 @@ func (pp *PathParser) doParse(component, s string, p *Path) (*Path, error) {
 
 func ModifyPathBundleTypeResource(p *Path) {
 	if p.IsContent() {
-		p.bundleType = PathTypeContentResource
+		p.pathType = TypeContentResource
 	} else {
-		p.bundleType = PathTypeFile
+		p.pathType = TypeFile
 	}
 }
 
-type PathType int
+//go:generate stringer -type Type
+
+type Type int
 
 const (
+
 	// A generic resource, e.g. a JSON file.
-	PathTypeFile PathType = iota
+	TypeFile Type = iota
 
 	// All below are content files.
 	// A resource of a content type with front matter.
-	PathTypeContentResource
+	TypeContentResource
 
 	// E.g. /blog/my-post.md
-	PathTypeContentSingle
+	TypeContentSingle
 
 	// All below are bundled content files.
 
 	// Leaf bundles, e.g. /blog/my-post/index.md
-	PathTypeLeaf
+	TypeLeaf
 
 	// Branch bundles, e.g. /blog/_index.md
-	PathTypeBranch
+	TypeBranch
 
 	// Content data file, _content.gotmpl.
-	PathTypeContentData
+	TypeContentData
+
+	// Layout types.
+	TypeMarkup
+	TypeShortcode
+	TypePartial
+	TypeBaseof
 )
 
 type Path struct {
@@ -257,13 +369,18 @@ type Path struct {
 	posContainerHigh int
 	posSectionHigh   int
 
-	component  string
+	component string
-	bundleType PathType
+	pathType  Type
 
-	identifiers []types.LowHigh[string]
+	identifiersKnown   []types.LowHigh[string]
+	identifiersUnknown []types.LowHigh[string]
 
-	posIdentifierLanguage int
+	posIdentifierLanguage     int
-	disabled              bool
+	posIdentifierOutputFormat int
+	posIdentifierKind         int
+	posIdentifierLayout       int
+	posIdentifierBaseof       int
+	disabled                  bool
 
 	trimLeadingSlash bool
 
@@ -293,9 +410,13 @@ func (p *Path) reset() {
 	p.posContainerHigh = -1
 	p.posSectionHigh = -1
 	p.component = ""
-	p.bundleType = 0
+	p.pathType = 0
-	p.identifiers = p.identifiers[:0]
+	p.identifiersKnown = p.identifiersKnown[:0]
 	p.posIdentifierLanguage = -1
+	p.posIdentifierOutputFormat = -1
+	p.posIdentifierKind = -1
+	p.posIdentifierLayout = -1
+	p.posIdentifierBaseof = -1
 	p.disabled = false
 	p.trimLeadingSlash = false
 	p.unnormalized = nil
@@ -316,6 +437,9 @@ func (p *Path) norm(s string) string {
 
 // IdentifierBase satisfies identity.Identity.
 func (p *Path) IdentifierBase() string {
+	if p.Component() == files.ComponentFolderLayouts {
+		return p.Path()
+	}
 	return p.Base()
 }
 
@@ -332,6 +456,13 @@ func (p *Path) Container() string {
 	return p.norm(p.s[p.posContainerLow : p.posContainerHigh-1])
 }
 
+func (p *Path) String() string {
+	if p == nil {
+		return "<nil>"
+	}
+	return p.Path()
+}
+
 // ContainerDir returns the container directory for this path.
 // For content bundles this will be the parent directory.
 func (p *Path) ContainerDir() string {
@@ -352,13 +483,13 @@ func (p *Path) Section() string {
 // IsContent returns true if the path is a content file (e.g. mypost.md).
 // Note that this will also return true for content files in a bundle.
 func (p *Path) IsContent() bool {
-	return p.BundleType() >= PathTypeContentResource
+	return p.Type() >= TypeContentResource && p.Type() <= TypeContentData
 }
 
 // isContentPage returns true if the path is a content file (e.g. mypost.md),
 // but nof if inside a leaf bundle.
 func (p *Path) isContentPage() bool {
-	return p.BundleType() >= PathTypeContentSingle
+	return p.Type() >= TypeContentSingle && p.Type() <= TypeContentData
 }
 
 // Name returns the last element of path.
@@ -372,7 +503,7 @@ func (p *Path) Name() string {
 // Name returns the last element of path without any extension.
 func (p *Path) NameNoExt() string {
 	if i := p.identifierIndex(0); i != -1 {
-		return p.s[p.posContainerHigh : p.identifiers[i].Low-1]
+		return p.s[p.posContainerHigh : p.identifiersKnown[i].Low-1]
 	}
 	return p.s[p.posContainerHigh:]
 }
@@ -384,7 +515,7 @@ func (p *Path) NameNoLang() string {
 		return p.Name()
 	}
 
-	return p.s[p.posContainerHigh:p.identifiers[i].Low-1] + p.s[p.identifiers[i].High:]
+	return p.s[p.posContainerHigh:p.identifiersKnown[i].Low-1] + p.s[p.identifiersKnown[i].High:]
 }
 
 // BaseNameNoIdentifier returns the logical base name for a resource without any identifier (e.g. no extension).
@@ -398,10 +529,26 @@ func (p *Path) BaseNameNoIdentifier() string {
 
 // NameNoIdentifier returns the last element of path without any identifier (e.g. no extension).
 func (p *Path) NameNoIdentifier() string {
-	if len(p.identifiers) > 0 {
+	lowHigh := p.nameLowHigh()
-		return p.s[p.posContainerHigh : p.identifiers[len(p.identifiers)-1].Low-1]
+	return p.s[lowHigh.Low:lowHigh.High]
+}
+
+func (p *Path) nameLowHigh() types.LowHigh[string] {
+	if len(p.identifiersKnown) > 0 {
+		lastID := p.identifiersKnown[len(p.identifiersKnown)-1]
+		if p.posContainerHigh == lastID.Low {
+			// The last identifier is the name.
+			return lastID
+		}
+		return types.LowHigh[string]{
+			Low:  p.posContainerHigh,
+			High: p.identifiersKnown[len(p.identifiersKnown)-1].Low - 1,
+		}
+	}
+	return types.LowHigh[string]{
+		Low:  p.posContainerHigh,
+		High: len(p.s),
 	}
-	return p.s[p.posContainerHigh:]
 }
 
 // Dir returns all but the last element of path, typically the path's directory.
@@ -421,6 +568,11 @@ func (p *Path) Path() (d string) {
 	return p.norm(p.s)
 }
 
+// PathNoLeadingSlash returns the full path without the leading slash.
+func (p *Path) PathNoLeadingSlash() string {
+	return p.Path()[1:]
+}
+
 // Unnormalized returns the Path with the original case preserved.
 func (p *Path) Unnormalized() *Path {
 	return p.unnormalized
@@ -436,6 +588,28 @@ func (p *Path) PathNoIdentifier() string {
 	return p.base(false, false)
 }
 
+// PathBeforeLangAndOutputFormatAndExt returns the path up to the first identifier that is not a language or output format.
+func (p *Path) PathBeforeLangAndOutputFormatAndExt() string {
+	if len(p.identifiersKnown) == 0 {
+		return p.norm(p.s)
+	}
+	i := p.identifierIndex(0)
+
+	if j := p.posIdentifierOutputFormat; i == -1 || (j != -1 && j < i) {
+		i = j
+	}
+	if j := p.posIdentifierLanguage; i == -1 || (j != -1 && j < i) {
+		i = j
+	}
+
+	if i == -1 {
+		return p.norm(p.s)
+	}
+
+	id := p.identifiersKnown[i]
+	return p.norm(p.s[:id.Low-1])
+}
+
 // PathRel returns the path relative to the given owner.
 func (p *Path) PathRel(owner *Path) string {
 	ob := owner.Base()
@@ -462,26 +636,42 @@ func (p *Path) Base() string {
 	return p.base(!p.isContentPage(), p.IsBundle())
 }
 
+// Used in template lookups.
+// For pages with Type set, we treat that as the section.
+func (p *Path) BaseReTyped(typ string) (d string) {
+	base := p.Base()
+	if typ == "" || p.Section() == typ {
+		return base
+	}
+	d = "/" + typ
+	if p.posSectionHigh != -1 {
+		d += base[p.posSectionHigh:]
+	}
+	d = p.norm(d)
+	return
+}
+
 // BaseNoLeadingSlash returns the base path without the leading slash.
 func (p *Path) BaseNoLeadingSlash() string {
 	return p.Base()[1:]
 }
 
 func (p *Path) base(preserveExt, isBundle bool) string {
-	if len(p.identifiers) == 0 {
+	if len(p.identifiersKnown) == 0 {
 		return p.norm(p.s)
 	}
 
-	if preserveExt && len(p.identifiers) == 1 {
+	if preserveExt && len(p.identifiersKnown) == 1 {
 		// Preserve extension.
 		return p.norm(p.s)
 	}
 
-	id := p.identifiers[len(p.identifiers)-1]
+	var high int
-	high := id.Low - 1
 
 	if isBundle {
 		high = p.posContainerHigh - 1
+	} else {
+		high = p.nameLowHigh().High
 	}
 
 	if high == 0 {
@@ -493,7 +683,7 @@ func (p *Path) base(preserveExt, isBundle bool) string {
 	}
 
 	// For txt files etc. we want to preserve the extension.
-	id = p.identifiers[0]
+	id := p.identifiersKnown[0]
 
 	return p.norm(p.s[:high] + p.s[id.Low-1:id.High])
 }
@@ -502,8 +692,20 @@ func (p *Path) Ext() string {
 	return p.identifierAsString(0)
 }
 
+func (p *Path) OutputFormat() string {
+	return p.identifierAsString(p.posIdentifierOutputFormat)
+}
+
+func (p *Path) Kind() string {
+	return p.identifierAsString(p.posIdentifierKind)
+}
+
+func (p *Path) Layout() string {
+	return p.identifierAsString(p.posIdentifierLayout)
+}
+
 func (p *Path) Lang() string {
-	return p.identifierAsString(1)
+	return p.identifierAsString(p.posIdentifierLanguage)
 }
 
 func (p *Path) Identifier(i int) string {
@@ -515,35 +717,43 @@ func (p *Path) Disabled() bool {
 }
 
 func (p *Path) Identifiers() []string {
-	ids := make([]string, len(p.identifiers))
+	ids := make([]string, len(p.identifiersKnown))
-	for i, id := range p.identifiers {
+	for i, id := range p.identifiersKnown {
 		ids[i] = p.s[id.Low:id.High]
 	}
 	return ids
 }
 
-func (p *Path) BundleType() PathType {
+func (p *Path) IdentifiersUnknown() []string {
-	return p.bundleType
+	ids := make([]string, len(p.identifiersUnknown))
+	for i, id := range p.identifiersUnknown {
+		ids[i] = p.s[id.Low:id.High]
+	}
+	return ids
+}
+
+func (p *Path) Type() Type {
+	return p.pathType
 }
 
 func (p *Path) IsBundle() bool {
-	return p.bundleType >= PathTypeLeaf
+	return p.pathType >= TypeLeaf && p.pathType <= TypeContentData
 }
 
 func (p *Path) IsBranchBundle() bool {
-	return p.bundleType == PathTypeBranch
+	return p.pathType == TypeBranch
 }
 
 func (p *Path) IsLeafBundle() bool {
-	return p.bundleType == PathTypeLeaf
+	return p.pathType == TypeLeaf
 }
 
 func (p *Path) IsContentData() bool {
-	return p.bundleType == PathTypeContentData
+	return p.pathType == TypeContentData
 }
 
-func (p Path) ForBundleType(t PathType) *Path {
+func (p Path) ForType(t Type) *Path {
-	p.bundleType = t
+	p.pathType = t
 	return &p
 }
 
@@ -553,12 +763,12 @@ func (p *Path) identifierAsString(i int) string {
 		return ""
 	}
 
-	id := p.identifiers[i]
+	id := p.identifiersKnown[i]
 	return p.s[id.Low:id.High]
 }
 
 func (p *Path) identifierIndex(i int) int {
-	if i < 0 || i >= len(p.identifiers) {
+	if i < 0 || i >= len(p.identifiersKnown) {
 		return -1
 	}
 	return i

common/paths/pathparser_test.go

@@ -18,6 +18,7 @@ import (
 	"testing"
 
 	"github.com/gohugoio/hugo/hugofs/files"
+	"github.com/gohugoio/hugo/resources/kinds"
 
 	qt "github.com/frankban/quicktest"
 )
@@ -26,10 +27,18 @@ var testParser = &PathParser{
 	LanguageIndex: map[string]int{
 		"no": 0,
 		"en": 1,
+		"fr": 2,
 	},
 	IsContentExt: func(ext string) bool {
 		return ext == "md"
 	},
+	IsOutputFormat: func(name, ext string) bool {
+		switch name {
+		case "html", "amp", "csv", "rss":
+			return true
+		}
+		return false
+	},
 }
 
 func TestParse(t *testing.T) {
@@ -105,17 +114,19 @@ func TestParse(t *testing.T) {
 			"Basic Markdown file",
 			"/a/b/c.md",
 			func(c *qt.C, p *Path) {
+				c.Assert(p.Ext(), qt.Equals, "md")
+				c.Assert(p.Type(), qt.Equals, TypeContentSingle)
 				c.Assert(p.IsContent(), qt.IsTrue)
 				c.Assert(p.IsLeafBundle(), qt.IsFalse)
 				c.Assert(p.Name(), qt.Equals, "c.md")
 				c.Assert(p.Base(), qt.Equals, "/a/b/c")
+				c.Assert(p.BaseReTyped("foo"), qt.Equals, "/foo/b/c")
 				c.Assert(p.Section(), qt.Equals, "a")
 				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "c")
 				c.Assert(p.Path(), qt.Equals, "/a/b/c.md")
 				c.Assert(p.Dir(), qt.Equals, "/a/b")
 				c.Assert(p.Container(), qt.Equals, "b")
 				c.Assert(p.ContainerDir(), qt.Equals, "/a/b")
-				c.Assert(p.Ext(), qt.Equals, "md")
 			},
 		},
 		{
@@ -130,7 +141,7 @@ func TestParse(t *testing.T) {
 
 				// Reclassify it as a content resource.
 				ModifyPathBundleTypeResource(p)
-				c.Assert(p.BundleType(), qt.Equals, PathTypeContentResource)
+				c.Assert(p.Type(), qt.Equals, TypeContentResource)
 				c.Assert(p.IsContent(), qt.IsTrue)
 				c.Assert(p.Name(), qt.Equals, "b.md")
 				c.Assert(p.Base(), qt.Equals, "/a/b.md")
@@ -163,8 +174,10 @@ func TestParse(t *testing.T) {
 				c.Assert(p.NameNoIdentifier(), qt.Equals, "b.a.b")
 				c.Assert(p.NameNoLang(), qt.Equals, "b.a.b.txt")
 				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"txt", "no"})
+				c.Assert(p.IdentifiersUnknown(), qt.DeepEquals, []string{"b", "a", "b"})
 				c.Assert(p.Base(), qt.Equals, "/a/b.a.b.txt")
 				c.Assert(p.BaseNoLeadingSlash(), qt.Equals, "a/b.a.b.txt")
+				c.Assert(p.Path(), qt.Equals, "/a/b.a.b.no.txt")
 				c.Assert(p.PathNoLang(), qt.Equals, "/a/b.a.b.txt")
 				c.Assert(p.Ext(), qt.Equals, "txt")
 				c.Assert(p.PathNoIdentifier(), qt.Equals, "/a/b.a.b")
@@ -174,7 +187,11 @@ func TestParse(t *testing.T) {
 			"Home branch cundle",
 			"/_index.md",
 			func(c *qt.C, p *Path) {
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"md"})
+				c.Assert(p.IsBranchBundle(), qt.IsTrue)
+				c.Assert(p.IsBundle(), qt.IsTrue)
 				c.Assert(p.Base(), qt.Equals, "/")
+				c.Assert(p.BaseReTyped("foo"), qt.Equals, "/foo")
 				c.Assert(p.Path(), qt.Equals, "/_index.md")
 				c.Assert(p.Container(), qt.Equals, "")
 				c.Assert(p.ContainerDir(), qt.Equals, "/")
@@ -185,12 +202,14 @@ func TestParse(t *testing.T) {
 			"/a/index.md",
 			func(c *qt.C, p *Path) {
 				c.Assert(p.Base(), qt.Equals, "/a")
+				c.Assert(p.BaseReTyped("foo"), qt.Equals, "/foo/a")
 				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "a")
 				c.Assert(p.Container(), qt.Equals, "a")
 				c.Assert(p.Container(), qt.Equals, "a")
 				c.Assert(p.ContainerDir(), qt.Equals, "")
 				c.Assert(p.Dir(), qt.Equals, "/a")
 				c.Assert(p.Ext(), qt.Equals, "md")
+				c.Assert(p.IdentifiersUnknown(), qt.DeepEquals, []string{"index"})
 				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"md"})
 				c.Assert(p.IsBranchBundle(), qt.IsFalse)
 				c.Assert(p.IsBundle(), qt.IsTrue)
@@ -208,6 +227,7 @@ func TestParse(t *testing.T) {
 			func(c *qt.C, p *Path) {
 				c.Assert(p.Base(), qt.Equals, "/a/b")
 				c.Assert(p.BaseNameNoIdentifier(), qt.Equals, "b")
+				c.Assert(p.BaseReTyped("foo"), qt.Equals, "/foo/b")
 				c.Assert(p.Container(), qt.Equals, "b")
 				c.Assert(p.ContainerDir(), qt.Equals, "/a")
 				c.Assert(p.Dir(), qt.Equals, "/a/b")
@@ -220,6 +240,7 @@ func TestParse(t *testing.T) {
 				c.Assert(p.NameNoExt(), qt.Equals, "index.no")
 				c.Assert(p.NameNoIdentifier(), qt.Equals, "index")
 				c.Assert(p.NameNoLang(), qt.Equals, "index.md")
+				c.Assert(p.Path(), qt.Equals, "/a/b/index.no.md")
 				c.Assert(p.PathNoLang(), qt.Equals, "/a/b/index.md")
 				c.Assert(p.Section(), qt.Equals, "a")
 			},
@@ -355,11 +376,225 @@ func TestParse(t *testing.T) {
 	}
 	for _, test := range tests {
 		c.Run(test.name, func(c *qt.C) {
+			if test.name != "Home branch cundle" {
+				// return
+			}
 			test.assert(c, testParser.Parse(files.ComponentFolderContent, test.path))
 		})
 	}
 }
 
+func TestParseLayouts(t *testing.T) {
+	c := qt.New(t)
+
+	tests := []struct {
+		name   string
+		path   string
+		assert func(c *qt.C, p *Path)
+	}{
+		{
+			"Basic",
+			"/list.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/list.html")
+				c.Assert(p.OutputFormat(), qt.Equals, "html")
+			},
+		},
+		{
+			"Lang",
+			"/list.no.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "no", "list"})
+				c.Assert(p.IdentifiersUnknown(), qt.DeepEquals, []string{})
+				c.Assert(p.Base(), qt.Equals, "/list.html")
+				c.Assert(p.Lang(), qt.Equals, "no")
+			},
+		},
+		{
+			"Kind",
+			"/section.no.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Kind(), qt.Equals, kinds.KindSection)
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "no", "section"})
+				c.Assert(p.IdentifiersUnknown(), qt.DeepEquals, []string{})
+				c.Assert(p.Base(), qt.Equals, "/section.html")
+				c.Assert(p.Lang(), qt.Equals, "no")
+			},
+		},
+		{
+			"Layout",
+			"/list.section.no.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Layout(), qt.Equals, "list")
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "no", "section", "list"})
+				c.Assert(p.IdentifiersUnknown(), qt.DeepEquals, []string{})
+				c.Assert(p.Base(), qt.Equals, "/list.html")
+				c.Assert(p.Lang(), qt.Equals, "no")
+			},
+		},
+		{
+			"Layout multiple",
+			"/mylayout.list.section.no.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Layout(), qt.Equals, "mylayout")
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "no", "section", "list", "mylayout"})
+				c.Assert(p.IdentifiersUnknown(), qt.DeepEquals, []string{})
+				c.Assert(p.Base(), qt.Equals, "/mylayout.html")
+				c.Assert(p.Lang(), qt.Equals, "no")
+			},
+		},
+		{
+			"Layout shortcode",
+			"/_shortcodes/myshort.list.no.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Layout(), qt.Equals, "list")
+			},
+		},
+		{
+			"Layout baseof",
+			"/baseof.list.no.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Layout(), qt.Equals, "list")
+			},
+		},
+		{
+			"Lang and output format",
+			"/list.no.amp.not.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "not", "amp", "no", "list"})
+				c.Assert(p.OutputFormat(), qt.Equals, "amp")
+				c.Assert(p.Ext(), qt.Equals, "html")
+				c.Assert(p.Lang(), qt.Equals, "no")
+				c.Assert(p.Base(), qt.Equals, "/list.html")
+			},
+		},
+		{
+			"Term",
+			"/term.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/term.html")
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "term"})
+				c.Assert(p.PathNoIdentifier(), qt.Equals, "/term")
+				c.Assert(p.PathBeforeLangAndOutputFormatAndExt(), qt.Equals, "/term")
+				c.Assert(p.Lang(), qt.Equals, "")
+				c.Assert(p.Kind(), qt.Equals, "term")
+				c.Assert(p.OutputFormat(), qt.Equals, "html")
+			},
+		},
+		{
+			"Shortcode with layout",
+			"/_shortcodes/myshortcode.list.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Base(), qt.Equals, "/_shortcodes/myshortcode.html")
+				c.Assert(p.Type(), qt.Equals, TypeShortcode)
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "list"})
+				c.Assert(p.Layout(), qt.Equals, "list")
+				c.Assert(p.PathNoIdentifier(), qt.Equals, "/_shortcodes/myshortcode")
+				c.Assert(p.PathBeforeLangAndOutputFormatAndExt(), qt.Equals, "/_shortcodes/myshortcode.list")
+				c.Assert(p.Lang(), qt.Equals, "")
+				c.Assert(p.Kind(), qt.Equals, "")
+				c.Assert(p.OutputFormat(), qt.Equals, "html")
+			},
+		},
+		{
+			"Sub dir",
+			"/pages/home.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "home"})
+				c.Assert(p.Lang(), qt.Equals, "")
+				c.Assert(p.Kind(), qt.Equals, "home")
+				c.Assert(p.OutputFormat(), qt.Equals, "html")
+				c.Assert(p.Dir(), qt.Equals, "/pages")
+			},
+		},
+		{
+			"Baseof",
+			"/pages/baseof.list.section.fr.amp.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Identifiers(), qt.DeepEquals, []string{"html", "amp", "fr", "section", "list", "baseof"})
+				c.Assert(p.IdentifiersUnknown(), qt.DeepEquals, []string{})
+				c.Assert(p.Kind(), qt.Equals, kinds.KindSection)
+				c.Assert(p.Lang(), qt.Equals, "fr")
+				c.Assert(p.OutputFormat(), qt.Equals, "amp")
+				c.Assert(p.Dir(), qt.Equals, "/pages")
+				c.Assert(p.NameNoIdentifier(), qt.Equals, "baseof")
+				c.Assert(p.Type(), qt.Equals, TypeBaseof)
+				c.Assert(p.IdentifierBase(), qt.Equals, "/pages/baseof.list.section.fr.amp.html")
+			},
+		},
+		{
+			"Markup",
+			"/_markup/render-link.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Type(), qt.Equals, TypeMarkup)
+			},
+		},
+		{
+			"Markup nested",
+			"/foo/_markup/render-link.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Type(), qt.Equals, TypeMarkup)
+			},
+		},
+		{
+			"Shortcode",
+			"/_shortcodes/myshortcode.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Type(), qt.Equals, TypeShortcode)
+			},
+		},
+		{
+			"Shortcode nested",
+			"/foo/_shortcodes/myshortcode.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Type(), qt.Equals, TypeShortcode)
+			},
+		},
+		{
+			"Shortcode nested sub",
+			"/foo/_shortcodes/foo/myshortcode.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Type(), qt.Equals, TypeShortcode)
+			},
+		},
+		{
+			"Partials",
+			"/_partials/foo.bar",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Type(), qt.Equals, TypePartial)
+			},
+		},
+		{
+			"Shortcode lang in root",
+			"/_shortcodes/no.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Type(), qt.Equals, TypeShortcode)
+				c.Assert(p.Lang(), qt.Equals, "")
+				c.Assert(p.NameNoIdentifier(), qt.Equals, "no")
+			},
+		},
+		{
+			"Shortcode lang layout",
+			"/_shortcodes/myshortcode.no.html",
+			func(c *qt.C, p *Path) {
+				c.Assert(p.Type(), qt.Equals, TypeShortcode)
+				c.Assert(p.Lang(), qt.Equals, "no")
+				c.Assert(p.Layout(), qt.Equals, "")
+				c.Assert(p.NameNoIdentifier(), qt.Equals, "myshortcode")
+			},
+		},
+	}
+
+	for _, test := range tests {
+		c.Run(test.name, func(c *qt.C) {
+			if test.name != "Shortcode lang layout" {
+				// return
+			}
+			test.assert(c, testParser.Parse(files.ComponentFolderLayouts, test.path))
+		})
+	}
+}
+
 func TestHasExt(t *testing.T) {
 	c := qt.New(t)
 

common/paths/paths_integration_test.go

@@ -78,3 +78,26 @@ disablePathToLower = true
 	b.AssertFileContent("public/en/mysection/mybundle/index.html", "en|Single")
 	b.AssertFileContent("public/fr/MySection/MyBundle/index.html", "fr|Single")
 }
+
+func TestIssue13596(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableKinds = ['home','rss','section','sitemap','taxonomy','term']
+-- content/p1/index.md --
+---
+title: p1
+---
+-- content/p1/a.1.txt --
+-- content/p1/a.2.txt --
+-- layouts/all.html --
+{{ range .Resources.Match "*" }}{{ .Name }}|{{ end }}
+`
+
+	b := hugolib.Test(t, files)
+
+	b.AssertFileContent("public/p1/index.html", "a.1.txt|a.2.txt|")
+	b.AssertFileExists("public/p1/a.1.txt", true)
+	b.AssertFileExists("public/p1/a.2.txt", true) // fails
+}

common/paths/pathtype_string.go

@@ -1,27 +0,0 @@
-// Code generated by "stringer -type=PathType"; DO NOT EDIT.
-
-package paths
-
-import "strconv"
-
-func _() {
-	// An "invalid array index" compiler error signifies that the constant values have changed.
-	// Re-run the stringer command to generate them again.
-	var x [1]struct{}
-	_ = x[PathTypeFile-0]
-	_ = x[PathTypeContentResource-1]
-	_ = x[PathTypeContentSingle-2]
-	_ = x[PathTypeLeaf-3]
-	_ = x[PathTypeBranch-4]
-}
-
-const _PathType_name = "PathTypeFilePathTypeContentResourcePathTypeContentSinglePathTypeLeafPathTypeBranch"
-
-var _PathType_index = [...]uint8{0, 12, 35, 56, 68, 82}
-
-func (i PathType) String() string {
-	if i < 0 || i >= PathType(len(_PathType_index)-1) {
-		return "PathType(" + strconv.FormatInt(int64(i), 10) + ")"
-	}
-	return _PathType_name[_PathType_index[i]:_PathType_index[i+1]]
-}

common/paths/type_string.go

@@ -0,0 +1,32 @@
+// Code generated by "stringer -type Type"; DO NOT EDIT.
+
+package paths
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[TypeFile-0]
+	_ = x[TypeContentResource-1]
+	_ = x[TypeContentSingle-2]
+	_ = x[TypeLeaf-3]
+	_ = x[TypeBranch-4]
+	_ = x[TypeContentData-5]
+	_ = x[TypeMarkup-6]
+	_ = x[TypeShortcode-7]
+	_ = x[TypePartial-8]
+	_ = x[TypeBaseof-9]
+}
+
+const _Type_name = "TypeFileTypeContentResourceTypeContentSingleTypeLeafTypeBranchTypeContentDataTypeMarkupTypeShortcodeTypePartialTypeBaseof"
+
+var _Type_index = [...]uint8{0, 8, 27, 44, 52, 62, 77, 87, 100, 111, 121}
+
+func (i Type) String() string {
+	if i < 0 || i >= Type(len(_Type_index)-1) {
+		return "Type(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _Type_name[_Type_index[i]:_Type_index[i+1]]
+}

common/paths/url.go

@@ -1,4 +1,4 @@
-// Copyright 2021 The Hugo Authors. All rights reserved.
+// Copyright 2024 The Hugo Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -18,6 +18,7 @@ import (
 	"net/url"
 	"path"
 	"path/filepath"
+	"runtime"
 	"strings"
 )
 
@@ -159,31 +160,6 @@ func Uglify(in string) string {
 	return path.Clean(in)
 }
 
-// UrlToFilename converts the URL s to a filename.
-// If ParseRequestURI fails, the input is just converted to OS specific slashes and returned.
-func UrlToFilename(s string) (string, bool) {
-	u, err := url.ParseRequestURI(s)
-	if err != nil {
-		return filepath.FromSlash(s), false
-	}
-
-	p := u.Path
-
-	if p == "" {
-		p, _ = url.QueryUnescape(u.Opaque)
-		return filepath.FromSlash(p), true
-	}
-
-	p = filepath.FromSlash(p)
-
-	if u.Host != "" {
-		// C:\data\file.txt
-		p = strings.ToUpper(u.Host) + ":" + p
-	}
-
-	return p, true
-}
-
 // URLEscape escapes unicode letters.
 func URLEscape(uri string) string {
 	// escape unicode letters
@@ -193,3 +169,105 @@ func URLEscape(uri string) string {
 	}
 	return u.String()
 }
+
+// TrimExt trims the extension from a path..
+func TrimExt(in string) string {
+	return strings.TrimSuffix(in, path.Ext(in))
+}
+
+// From https://github.com/golang/go/blob/e0c76d95abfc1621259864adb3d101cf6f1f90fc/src/cmd/go/internal/web/url.go#L45
+func UrlFromFilename(filename string) (*url.URL, error) {
+	if !filepath.IsAbs(filename) {
+		return nil, fmt.Errorf("filepath must be absolute")
+	}
+
+	// If filename has a Windows volume name, convert the volume to a host and prefix
+	// per https://blogs.msdn.microsoft.com/ie/2006/12/06/file-uris-in-windows/.
+	if vol := filepath.VolumeName(filename); vol != "" {
+		if strings.HasPrefix(vol, `\\`) {
+			filename = filepath.ToSlash(filename[2:])
+			i := strings.IndexByte(filename, '/')
+
+			if i < 0 {
+				// A degenerate case.
+				// \\host.example.com (without a share name)
+				// becomes
+				// file://host.example.com/
+				return &url.URL{
+					Scheme: "file",
+					Host:   filename,
+					Path:   "/",
+				}, nil
+			}
+
+			// \\host.example.com\Share\path\to\file
+			// becomes
+			// file://host.example.com/Share/path/to/file
+			return &url.URL{
+				Scheme: "file",
+				Host:   filename[:i],
+				Path:   filepath.ToSlash(filename[i:]),
+			}, nil
+		}
+
+		// C:\path\to\file
+		// becomes
+		// file:///C:/path/to/file
+		return &url.URL{
+			Scheme: "file",
+			Path:   "/" + filepath.ToSlash(filename),
+		}, nil
+	}
+
+	// /path/to/file
+	// becomes
+	// file:///path/to/file
+	return &url.URL{
+		Scheme: "file",
+		Path:   filepath.ToSlash(filename),
+	}, nil
+}
+
+// UrlStringToFilename converts the URL s to a filename.
+// If ParseRequestURI fails, the input is just converted to OS specific slashes and returned.
+func UrlStringToFilename(s string) (string, bool) {
+	u, err := url.ParseRequestURI(s)
+	if err != nil {
+		return filepath.FromSlash(s), false
+	}
+
+	p := u.Path
+
+	if p == "" {
+		p, _ = url.QueryUnescape(u.Opaque)
+		return filepath.FromSlash(p), false
+	}
+
+	if runtime.GOOS != "windows" {
+		return p, true
+	}
+
+	if len(p) == 0 || p[0] != '/' {
+		return filepath.FromSlash(p), false
+	}
+
+	p = filepath.FromSlash(p)
+
+	if len(u.Host) == 1 {
+		// file://c/Users/...
+		return strings.ToUpper(u.Host) + ":" + p, true
+	}
+
+	if u.Host != "" && u.Host != "localhost" {
+		if filepath.VolumeName(u.Host) != "" {
+			return "", false
+		}
+		return `\\` + u.Host + p, true
+	}
+
+	if vol := filepath.VolumeName(p[1:]); vol == "" || strings.HasPrefix(vol, `\\`) {
+		return "", false
+	}
+
+	return p[1:], true
+}

common/rungroup/rungroup.go

@@ -51,7 +51,7 @@ func Run[T any](ctx context.Context, cfg Config[T]) Group[T] {
 	// Buffered for performance.
 	ch := make(chan T, cfg.NumWorkers)
 
-	for i := 0; i < cfg.NumWorkers; i++ {
+	for range cfg.NumWorkers {
 		g.Go(func() error {
 			for {
 				select {

common/tasks/tasks.go

@@ -103,10 +103,7 @@ func (r *RunEvery) Add(name string, f Func) {
 		f.IntervalHigh = 20 * time.Second
 	}
 
-	start := f.IntervalHigh / 3
+	start := max(f.IntervalHigh/3, f.IntervalLow)
-	if start < f.IntervalLow {
-		start = f.IntervalLow
-	}
 	f.interval = start
 	f.last = time.Now()
 

common/terminal/colors.go

@@ -17,7 +17,6 @@ package terminal
 import (
 	"fmt"
 	"os"
-	"runtime"
 	"strings"
 
 	isatty "github.com/mattn/go-isatty"
@@ -41,10 +40,6 @@ func PrintANSIColors(f *os.File) bool {
 // IsTerminal return true if the file descriptor is terminal and the TERM
 // environment variable isn't a dumb one.
 func IsTerminal(f *os.File) bool {
-	if runtime.GOOS == "windows" {
-		return false
-	}
-
 	fd := f.Fd()
 	return os.Getenv("TERM") != "dumb" && (isatty.IsTerminal(fd) || isatty.IsCygwinTerminal(fd))
 }

common/types/closer.go

@@ -19,6 +19,13 @@ type Closer interface {
 	Close() error
 }
 
+// CloserFunc is a convenience type to create a Closer from a function.
+type CloserFunc func() error
+
+func (f CloserFunc) Close() error {
+	return f()
+}
+
 type CloseAdder interface {
 	Add(Closer)
 }

common/types/convert.go

@@ -69,7 +69,7 @@ func ToStringSlicePreserveStringE(v any) ([]string, error) {
 	switch vv.Kind() {
 	case reflect.Slice, reflect.Array:
 		result = make([]string, vv.Len())
-		for i := 0; i < vv.Len(); i++ {
+		for i := range vv.Len() {
 			s, err := cast.ToStringE(vv.Index(i).Interface())
 			if err != nil {
 				return nil, err

common/types/evictingqueue.go

@@ -15,27 +15,28 @@
 package types
 
 import (
+	"slices"
 	"sync"
 )
 
-// EvictingStringQueue is a queue which automatically evicts elements from the head of
+// EvictingQueue is a queue which automatically evicts elements from the head of
 // the queue when attempting to add new elements onto the queue and it is full.
 // This queue orders elements LIFO (last-in-first-out). It throws away duplicates.
-// Note: This queue currently does not contain any remove (poll etc.) methods.
+type EvictingQueue[T comparable] struct {
-type EvictingStringQueue struct {
 	size int
-	vals []string
+	vals []T
-	set  map[string]bool
+	set  map[T]bool
 	mu   sync.Mutex
+	zero T
 }
 
-// NewEvictingStringQueue creates a new queue with the given size.
+// NewEvictingQueue creates a new queue with the given size.
-func NewEvictingStringQueue(size int) *EvictingStringQueue {
+func NewEvictingQueue[T comparable](size int) *EvictingQueue[T] {
-	return &EvictingStringQueue{size: size, set: make(map[string]bool)}
+	return &EvictingQueue[T]{size: size, set: make(map[T]bool)}
 }
 
 // Add adds a new string to the tail of the queue if it's not already there.
-func (q *EvictingStringQueue) Add(v string) *EvictingStringQueue {
+func (q *EvictingQueue[T]) Add(v T) *EvictingQueue[T] {
 	q.mu.Lock()
 	if q.set[v] {
 		q.mu.Unlock()
@@ -45,7 +46,7 @@ func (q *EvictingStringQueue) Add(v string) *EvictingStringQueue {
 	if len(q.set) == q.size {
 		// Full
 		delete(q.set, q.vals[0])
-		q.vals = append(q.vals[:0], q.vals[1:]...)
+		q.vals = slices.Delete(q.vals, 0, 1)
 	}
 	q.set[v] = true
 	q.vals = append(q.vals, v)
@@ -54,7 +55,7 @@ func (q *EvictingStringQueue) Add(v string) *EvictingStringQueue {
 	return q
 }
 
-func (q *EvictingStringQueue) Len() int {
+func (q *EvictingQueue[T]) Len() int {
 	if q == nil {
 		return 0
 	}
@@ -64,19 +65,22 @@ func (q *EvictingStringQueue) Len() int {
 }
 
 // Contains returns whether the queue contains v.
-func (q *EvictingStringQueue) Contains(v string) bool {
+func (q *EvictingQueue[T]) Contains(v T) bool {
+	if q == nil {
+		return false
+	}
 	q.mu.Lock()
 	defer q.mu.Unlock()
 	return q.set[v]
 }
 
 // Peek looks at the last element added to the queue.
-func (q *EvictingStringQueue) Peek() string {
+func (q *EvictingQueue[T]) Peek() T {
 	q.mu.Lock()
 	l := len(q.vals)
 	if l == 0 {
 		q.mu.Unlock()
-		return ""
+		return q.zero
 	}
 	elem := q.vals[l-1]
 	q.mu.Unlock()
@@ -84,9 +88,12 @@ func (q *EvictingStringQueue) Peek() string {
 }
 
 // PeekAll looks at all the elements in the queue, with the newest first.
-func (q *EvictingStringQueue) PeekAll() []string {
+func (q *EvictingQueue[T]) PeekAll() []T {
+	if q == nil {
+		return nil
+	}
 	q.mu.Lock()
-	vals := make([]string, len(q.vals))
+	vals := make([]T, len(q.vals))
 	copy(vals, q.vals)
 	q.mu.Unlock()
 	for i, j := 0, len(vals)-1; i < j; i, j = i+1, j-1 {
@@ -96,9 +103,9 @@ func (q *EvictingStringQueue) PeekAll() []string {
 }
 
 // PeekAllSet returns PeekAll as a set.
-func (q *EvictingStringQueue) PeekAllSet() map[string]bool {
+func (q *EvictingQueue[T]) PeekAllSet() map[T]bool {
 	all := q.PeekAll()
-	set := make(map[string]bool)
+	set := make(map[T]bool)
 	for _, v := range all {
 		set[v] = true
 	}

common/types/evictingqueue_test.go

@@ -23,7 +23,7 @@ import (
 func TestEvictingStringQueue(t *testing.T) {
 	c := qt.New(t)
 
-	queue := NewEvictingStringQueue(3)
+	queue := NewEvictingQueue[string](3)
 
 	c.Assert(queue.Peek(), qt.Equals, "")
 	queue.Add("a")
@@ -53,9 +53,9 @@ func TestEvictingStringQueueConcurrent(t *testing.T) {
 	var wg sync.WaitGroup
 	val := "someval"
 
-	queue := NewEvictingStringQueue(3)
+	queue := NewEvictingQueue[string](3)
 
-	for j := 0; j < 100; j++ {
+	for range 100 {
 		wg.Add(1)
 		go func() {
 			defer wg.Done()

common/types/types.go

@@ -28,6 +28,16 @@ type RLocker interface {
 	RUnlock()
 }
 
+type Locker interface {
+	Lock()
+	Unlock()
+}
+
+type RWLocker interface {
+	RLocker
+	Locker
+}
+
 // KeyValue is a interface{} tuple.
 type KeyValue struct {
 	Key   any
@@ -59,7 +69,7 @@ func (k KeyValues) String() string {
 // KeyValues struct.
 func NewKeyValuesStrings(key string, values ...string) KeyValues {
 	iv := make([]any, len(values))
-	for i := 0; i < len(values); i++ {
+	for i := range values {
 		iv[i] = values[i]
 	}
 	return KeyValues{Key: key, Values: iv}
@@ -133,22 +143,3 @@ func NewBool(b bool) *bool {
 type PrintableValueProvider interface {
 	PrintableValue() any
 }
-
-var _ PrintableValueProvider = Result[any]{}
-
-// Result is a generic result type.
-type Result[T any] struct {
-	// The result value.
-	Value T
-
-	// The error value.
-	Err error
-}
-
-// PrintableValue returns the value or panics if there is an error.
-func (r Result[T]) PrintableValue() any {
-	if r.Err != nil {
-		panic(r.Err)
-	}
-	return r.Value
-}

config/allconfig/allconfig.go

@@ -82,7 +82,7 @@ func init() {
 	}
 	configLanguageKeys = make(map[string]bool)
 	addKeys := func(v reflect.Value) {
-		for i := 0; i < v.NumField(); i++ {
+		for i := range v.NumField() {
 			name := strings.ToLower(v.Type().Field(i).Name)
 			if skip[name] {
 				continue
@@ -128,6 +128,9 @@ type Config struct {
 	// <docsmeta>{"identifiers": ["markup"] }</docsmeta>
 	Markup markup_config.Config `mapstructure:"-"`
 
+	// ContentTypes are the media types that's considered content in Hugo.
+	ContentTypes *config.ConfigNamespace[map[string]media.ContentTypeConfig, media.ContentTypes] `mapstructure:"-"`
+
 	// The mediatypes configuration section maps the MIME type (a string) to a configuration object for that type.
 	// <docsmeta>{"identifiers": ["mediatypes"], "refs": ["types:media:type"] }</docsmeta>
 	MediaTypes *config.ConfigNamespace[map[string]media.MediaTypeConfig, media.Types] `mapstructure:"-"`
@@ -143,7 +146,7 @@ type Config struct {
 
 	// The cascade configuration section contains the top level front matter cascade configuration options,
 	// a slice of page matcher and params to apply to those pages.
-	Cascade *config.ConfigNamespace[[]page.PageMatcherParamsConfig, map[page.PageMatcher]maps.Params] `mapstructure:"-"`
+	Cascade *config.ConfigNamespace[[]page.PageMatcherParamsConfig, *maps.Ordered[page.PageMatcher, page.PageMatcherParamsConfig]] `mapstructure:"-"`
 
 	// The segments defines segments for the site. Used for partial/segmented builds.
 	Segments *config.ConfigNamespace[map[string]segments.SegmentConfig, segments.Segments] `mapstructure:"-"`
@@ -301,6 +304,18 @@ func (c *Config) CompileConfig(logger loggers.Logger) error {
 		}
 	}
 
+	defaultOutputFormat := outputFormats[0]
+	c.DefaultOutputFormat = strings.ToLower(c.DefaultOutputFormat)
+	if c.DefaultOutputFormat != "" {
+		f, found := outputFormats.GetByName(c.DefaultOutputFormat)
+		if !found {
+			return fmt.Errorf("unknown default output format %q", c.DefaultOutputFormat)
+		}
+		defaultOutputFormat = f
+	} else {
+		c.DefaultOutputFormat = defaultOutputFormat.Name
+	}
+
 	disabledLangs := make(map[string]bool)
 	for _, lang := range c.DisableLanguages {
 		disabledLangs[lang] = true
@@ -381,32 +396,63 @@ func (c *Config) CompileConfig(logger loggers.Logger) error {
 
 	// Legacy paginate values.
 	if c.Paginate != 0 {
-		hugo.Deprecate("site config key paginate", "Use pagination.pagerSize instead.", "v0.128.0")
+		hugo.DeprecateWithLogger("site config key paginate", "Use pagination.pagerSize instead.", "v0.128.0", logger.Logger())
 		c.Pagination.PagerSize = c.Paginate
 	}
 
 	if c.PaginatePath != "" {
-		hugo.Deprecate("site config key paginatePath", "Use pagination.path instead.", "v0.128.0")
+		hugo.DeprecateWithLogger("site config key paginatePath", "Use pagination.path instead.", "v0.128.0", logger.Logger())
 		c.Pagination.Path = c.PaginatePath
 	}
 
+	// Legacy privacy values.
+	if c.Privacy.Twitter.Disable {
+		hugo.DeprecateWithLogger("site config key privacy.twitter.disable", "Use privacy.x.disable instead.", "v0.141.0", logger.Logger())
+		c.Privacy.X.Disable = c.Privacy.Twitter.Disable
+	}
+
+	if c.Privacy.Twitter.EnableDNT {
+		hugo.DeprecateWithLogger("site config key privacy.twitter.enableDNT", "Use privacy.x.enableDNT instead.", "v0.141.0", logger.Logger())
+		c.Privacy.X.EnableDNT = c.Privacy.Twitter.EnableDNT
+	}
+
+	if c.Privacy.Twitter.Simple {
+		hugo.DeprecateWithLogger("site config key privacy.twitter.simple", "Use privacy.x.simple instead.", "v0.141.0", logger.Logger())
+		c.Privacy.X.Simple = c.Privacy.Twitter.Simple
+	}
+
+	// Legacy services values.
+	if c.Services.Twitter.DisableInlineCSS {
+		hugo.DeprecateWithLogger("site config key services.twitter.disableInlineCSS", "Use services.x.disableInlineCSS instead.", "v0.141.0", logger.Logger())
+		c.Services.X.DisableInlineCSS = c.Services.Twitter.DisableInlineCSS
+	}
+
+	// Legacy permalink tokens
+	vs := fmt.Sprintf("%v", c.Permalinks)
+	if strings.Contains(vs, ":filename") {
+		hugo.DeprecateWithLogger("the \":filename\" permalink token", "Use \":contentbasename\" instead.", "0.144.0", logger.Logger())
+	}
+	if strings.Contains(vs, ":slugorfilename") {
+		hugo.DeprecateWithLogger("the \":slugorfilename\" permalink token", "Use \":slugorcontentbasename\" instead.", "0.144.0", logger.Logger())
+	}
+
 	c.C = &ConfigCompiled{
-		Timeout:           timeout,
+		Timeout:             timeout,
-		BaseURL:           baseURL,
+		BaseURL:             baseURL,
-		BaseURLLiveReload: baseURL,
+		BaseURLLiveReload:   baseURL,
-		DisabledKinds:     disabledKinds,
+		DisabledKinds:       disabledKinds,
-		DisabledLanguages: disabledLangs,
+		DisabledLanguages:   disabledLangs,
-		IgnoredLogs:       ignoredLogIDs,
+		IgnoredLogs:         ignoredLogIDs,
-		KindOutputFormats: kindOutputFormats,
+		KindOutputFormats:   kindOutputFormats,
-		ContentTypes:      media.DefaultContentTypes.FromTypes(c.MediaTypes.Config),
+		DefaultOutputFormat: defaultOutputFormat,
-		CreateTitle:       helpers.GetTitleFunc(c.TitleCaseStyle),
+		CreateTitle:         helpers.GetTitleFunc(c.TitleCaseStyle),
-		IsUglyURLSection:  isUglyURL,
+		IsUglyURLSection:    isUglyURL,
-		IgnoreFile:        ignoreFile,
+		IgnoreFile:          ignoreFile,
-		SegmentFilter:     c.Segments.Config.Get(func(s string) { logger.Warnf("Render segment %q not found in configuration", s) }, c.RootConfig.RenderSegments...),
+		SegmentFilter:       c.Segments.Config.Get(func(s string) { logger.Warnf("Render segment %q not found in configuration", s) }, c.RootConfig.RenderSegments...),
-		MainSections:      c.MainSections,
+		MainSections:        c.MainSections,
-		Clock:             clock,
+		Clock:               clock,
-		HTTPCache:         httpCache,
+		HTTPCache:           httpCache,
-		transientErr:      transientErr,
+		transientErr:        transientErr,
 	}
 
 	for _, s := range allDecoderSetups {
@@ -430,22 +476,22 @@ func (c *Config) IsLangDisabled(lang string) bool {
 
 // ConfigCompiled holds values and functions that are derived from the config.
 type ConfigCompiled struct {
-	Timeout           time.Duration
+	Timeout             time.Duration
-	BaseURL           urls.BaseURL
+	BaseURL             urls.BaseURL
-	BaseURLLiveReload urls.BaseURL
+	BaseURLLiveReload   urls.BaseURL
-	ServerInterface   string
+	ServerInterface     string
-	KindOutputFormats map[string]output.Formats
+	KindOutputFormats   map[string]output.Formats
-	ContentTypes      media.ContentTypes
+	DefaultOutputFormat output.Format
-	DisabledKinds     map[string]bool
+	DisabledKinds       map[string]bool
-	DisabledLanguages map[string]bool
+	DisabledLanguages   map[string]bool
-	IgnoredLogs       map[string]bool
+	IgnoredLogs         map[string]bool
-	CreateTitle       func(s string) string
+	CreateTitle         func(s string) string
-	IsUglyURLSection  func(section string) bool
+	IsUglyURLSection    func(section string) bool
-	IgnoreFile        func(filename string) bool
+	IgnoreFile          func(filename string) bool
-	SegmentFilter     segments.SegmentFilter
+	SegmentFilter       segments.SegmentFilter
-	MainSections      []string
+	MainSections        []string
-	Clock             time.Time
+	Clock               time.Time
-	HTTPCache         httpcache.ConfigCompiled
+	HTTPCache           httpcache.ConfigCompiled
 
 	// This is set to the last transient error found during config compilation.
 	// With themes/modules we compute the configuration in multiple passes, and
@@ -505,6 +551,13 @@ type RootConfig struct {
 	// Set this to true to put all languages below their language ID.
 	DefaultContentLanguageInSubdir bool
 
+	// The default output format to use for the site.
+	// If not set, we will use the first output format.
+	DefaultOutputFormat string
+
+	// Disable generation of redirect to the default language when DefaultContentLanguageInSubdir is enabled.
+	DisableDefaultLanguageRedirect bool
+
 	// Disable creation of alias redirect pages.
 	DisableAliases bool
 
@@ -723,15 +776,16 @@ type Configs struct {
 }
 
 func (c *Configs) Validate(logger loggers.Logger) error {
-	for p := range c.Base.Cascade.Config {
+	c.Base.Cascade.Config.Range(func(p page.PageMatcher, cfg page.PageMatcherParamsConfig) bool {
 		page.CheckCascadePattern(logger, p)
-	}
+		return true
+	})
 	return nil
 }
 
 // transientErr returns the last transient error found during config compilation.
 func (c *Configs) transientErr() error {
-	for _, l := range c.LanguageConfigSlice {
+	for _, l := range c.LanguageConfigMap {
 		if l.C.transientErr != nil {
 			return l.C.transientErr
 		}
@@ -746,31 +800,58 @@ func (c *Configs) IsZero() bool {
 
 func (c *Configs) Init() error {
 	var languages langs.Languages
-	defaultContentLanguage := c.Base.DefaultContentLanguage
+
-	for k, v := range c.LanguageConfigMap {
+	var langKeys []string
+	var hasEn bool
+
+	const en = "en"
+
+	for k := range c.LanguageConfigMap {
+		langKeys = append(langKeys, k)
+		if k == en {
+			hasEn = true
+		}
+	}
+
+	// Sort the LanguageConfigSlice by language weight (if set) or lang.
+	sort.Slice(langKeys, func(i, j int) bool {
+		ki := langKeys[i]
+		kj := langKeys[j]
+		lki := c.LanguageConfigMap[ki]
+		lkj := c.LanguageConfigMap[kj]
+		li := lki.Languages[ki]
+		lj := lkj.Languages[kj]
+		if li.Weight != lj.Weight {
+			return li.Weight < lj.Weight
+		}
+		return ki < kj
+	})
+
+	// See issue #13646.
+	defaultConfigLanguageFallback := en
+	if !hasEn {
+		// Pick the first one.
+		defaultConfigLanguageFallback = langKeys[0]
+	}
+
+	if c.Base.DefaultContentLanguage == "" {
+		c.Base.DefaultContentLanguage = defaultConfigLanguageFallback
+	}
+
+	for _, k := range langKeys {
+		v := c.LanguageConfigMap[k]
+		if v.DefaultContentLanguage == "" {
+			v.DefaultContentLanguage = defaultConfigLanguageFallback
+		}
 		c.LanguageConfigSlice = append(c.LanguageConfigSlice, v)
 		languageConf := v.Languages[k]
-		language, err := langs.NewLanguage(k, defaultContentLanguage, v.TimeZone, languageConf)
+		language, err := langs.NewLanguage(k, c.Base.DefaultContentLanguage, v.TimeZone, languageConf)
 		if err != nil {
 			return err
 		}
 		languages = append(languages, language)
 	}
 
-	// Sort the sites by language weight (if set) or lang.
-	sort.Slice(languages, func(i, j int) bool {
-		li := languages[i]
-		lj := languages[j]
-		if li.Weight != lj.Weight {
-			return li.Weight < lj.Weight
-		}
-		return li.Lang < lj.Lang
-	})
-
-	for _, l := range languages {
-		c.LanguageConfigSlice = append(c.LanguageConfigSlice, c.LanguageConfigMap[l.Lang])
-	}
-
 	// Filter out disabled languages.
 	var n int
 	for _, l := range languages {
@@ -783,12 +864,12 @@ func (c *Configs) Init() error {
 
 	var languagesDefaultFirst langs.Languages
 	for _, l := range languages {
-		if l.Lang == defaultContentLanguage {
+		if l.Lang == c.Base.DefaultContentLanguage {
 			languagesDefaultFirst = append(languagesDefaultFirst, l)
 		}
 	}
 	for _, l := range languages {
-		if l.Lang != defaultContentLanguage {
+		if l.Lang != c.Base.DefaultContentLanguage {
 			languagesDefaultFirst = append(languagesDefaultFirst, l)
 		}
 	}
@@ -796,7 +877,24 @@ func (c *Configs) Init() error {
 	c.Languages = languages
 	c.LanguagesDefaultFirst = languagesDefaultFirst
 
-	c.ContentPathParser = &paths.PathParser{LanguageIndex: languagesDefaultFirst.AsIndexSet(), IsLangDisabled: c.Base.IsLangDisabled, IsContentExt: c.Base.C.ContentTypes.IsContentSuffix}
+	c.ContentPathParser = &paths.PathParser{
+		LanguageIndex:  languagesDefaultFirst.AsIndexSet(),
+		IsLangDisabled: c.Base.IsLangDisabled,
+		IsContentExt:   c.Base.ContentTypes.Config.IsContentSuffix,
+		IsOutputFormat: func(name, ext string) bool {
+			if name == "" {
+				return false
+			}
+
+			if of, ok := c.Base.OutputFormats.Config.GetByName(name); ok {
+				if ext != "" && !of.MediaType.HasSuffix(ext) {
+					return false
+				}
+				return true
+			}
+			return false
+		},
+	}
 
 	c.configLangs = make([]config.AllProvider, len(c.Languages))
 	for i, l := range c.LanguagesDefaultFirst {
@@ -809,7 +907,7 @@ func (c *Configs) Init() error {
 	}
 
 	if len(c.Modules) == 0 {
-		return errors.New("no modules loaded (ned at least the main module)")
+		return errors.New("no modules loaded (need at least the main module)")
 	}
 
 	// Apply default project mounts.
@@ -857,17 +955,48 @@ func (c Configs) GetByLang(lang string) config.AllProvider {
 	return nil
 }
 
+func newDefaultConfig() *Config {
+	return &Config{
+		Taxonomies: map[string]string{"tag": "tags", "category": "categories"},
+		Sitemap:    config.SitemapConfig{Priority: -1, Filename: "sitemap.xml"},
+		RootConfig: RootConfig{
+			Environment:          hugo.EnvironmentProduction,
+			TitleCaseStyle:       "AP",
+			PluralizeListTitles:  true,
+			CapitalizeListTitles: true,
+			StaticDir:            []string{"static"},
+			SummaryLength:        70,
+			Timeout:              "60s",
+
+			CommonDirs: config.CommonDirs{
+				ArcheTypeDir: "archetypes",
+				ContentDir:   "content",
+				ResourceDir:  "resources",
+				PublishDir:   "public",
+				ThemesDir:    "themes",
+				AssetDir:     "assets",
+				LayoutDir:    "layouts",
+				I18nDir:      "i18n",
+				DataDir:      "data",
+			},
+		},
+	}
+}
+
 // fromLoadConfigResult creates a new Config from res.
 func fromLoadConfigResult(fs afero.Fs, logger loggers.Logger, res config.LoadConfigResult) (*Configs, error) {
 	if !res.Cfg.IsSet("languages") {
 		// We need at least one
 		lang := res.Cfg.GetString("defaultContentLanguage")
+		if lang == "" {
+			lang = "en"
+		}
 		res.Cfg.Set("languages", maps.Params{lang: maps.Params{}})
 	}
 	bcfg := res.BaseConfig
 	cfg := res.Cfg
 
-	all := &Config{}
+	all := newDefaultConfig()
 
 	err := decodeConfigFromParams(fs, logger, bcfg, cfg, all, nil)
 	if err != nil {
@@ -877,6 +1006,7 @@ func fromLoadConfigResult(fs afero.Fs, logger loggers.Logger, res config.LoadCon
 	langConfigMap := make(map[string]*Config)
 
 	languagesConfig := cfg.GetStringMap("languages")
+
 	var isMultihost bool
 
 	if err := all.CompileConfig(logger); err != nil {
@@ -888,30 +1018,17 @@ func fromLoadConfigResult(fs afero.Fs, logger loggers.Logger, res config.LoadCon
 		var differentRootKeys []string
 		switch x := v.(type) {
 		case maps.Params:
-			var params maps.Params
+			_, found := x["params"]
-			pv, found := x["params"]
+			if !found {
-			if found {
+				x["params"] = maps.Params{
-				params = pv.(maps.Params)
-			} else {
-				params = maps.Params{
 					maps.MergeStrategyKey: maps.ParamsMergeStrategyDeep,
 				}
-				x["params"] = params
 			}
 
 			for kk, vv := range x {
 				if kk == "_merge" {
 					continue
 				}
-				if kk != maps.MergeStrategyKey && !configLanguageKeys[kk] {
-					// This should have been placed below params.
-					// We accidentally allowed it in the past, so we need to support it a little longer,
-					// But log a warning.
-					if _, found := params[kk]; !found {
-						hugo.Deprecate(fmt.Sprintf("config: languages.%s.%s: custom params on the language top level", k, kk), fmt.Sprintf("Put the value below [languages.%s.params]. See https://gohugo.io/content-management/multilingual/#changes-in-hugo-01120", k), "v0.112.0")
-						params[kk] = vv
-					}
-				}
 				if kk == "baseurl" {
 					// baseURL configure don the language level is a multihost setup.
 					isMultihost = true

config/allconfig/allconfig_integration_test.go

@@ -5,8 +5,10 @@ import (
 	"testing"
 
 	qt "github.com/frankban/quicktest"
+	"github.com/gohugoio/hugo/common/hugo"
 	"github.com/gohugoio/hugo/config/allconfig"
 	"github.com/gohugoio/hugo/hugolib"
+	"github.com/gohugoio/hugo/media"
 )
 
 func TestDirsMount(t *testing.T) {
@@ -97,37 +99,13 @@ suffixes = ["html", "xhtml"]
 	b := hugolib.Test(t, files)
 
 	conf := b.H.Configs.Base
-	contentTypes := conf.C.ContentTypes
+	contentTypes := conf.ContentTypes.Config
 
 	b.Assert(contentTypes.HTML.Suffixes(), qt.DeepEquals, []string{"html", "xhtml"})
 	b.Assert(contentTypes.Markdown.Suffixes(), qt.DeepEquals, []string{"md", "mdown", "markdown"})
 }
 
-func TestPaginationConfigOld(t *testing.T) {
+func TestPaginationConfig(t *testing.T) {
-	files := `
--- hugo.toml --
- [languages.en]
- weight = 1
- paginatePath = "page-en"
- 
- [languages.de]
- weight = 2
- paginatePath = "page-de"
- paginate = 20
-`
-
-	b := hugolib.Test(t, files)
-
-	confEn := b.H.Sites[0].Conf.Pagination()
-	confDe := b.H.Sites[1].Conf.Pagination()
-
-	b.Assert(confEn.Path, qt.Equals, "page-en")
-	b.Assert(confEn.PagerSize, qt.Equals, 10)
-	b.Assert(confDe.Path, qt.Equals, "page-de")
-	b.Assert(confDe.PagerSize, qt.Equals, 20)
-}
-
-func TestPaginationConfigNew(t *testing.T) {
 	files := `
 -- hugo.toml --
  [languages.en]
@@ -184,3 +162,220 @@ title: "p3"
 	b.AssertFileExists("public/page/1/index.html", false)
 	b.AssertFileContent("public/page/2/index.html", "pagination-default")
 }
+
+func TestMapUglyURLs(t *testing.T) {
+	files := `
+-- hugo.toml --
+[uglyurls]
+  posts = true
+`
+
+	b := hugolib.Test(t, files)
+
+	c := b.H.Configs.Base
+
+	b.Assert(c.C.IsUglyURLSection("posts"), qt.IsTrue)
+	b.Assert(c.C.IsUglyURLSection("blog"), qt.IsFalse)
+}
+
+// Issue 13199
+func TestInvalidOutputFormat(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableKinds = ['page','rss','section','sitemap','taxonomy','term']
+[outputs]
+home = ['html','foo']
+-- layouts/index.html --
+x
+`
+
+	b, err := hugolib.TestE(t, files)
+	b.Assert(err, qt.IsNotNil)
+	b.Assert(err.Error(), qt.Contains, `failed to create config: unknown output format "foo" for kind "home"`)
+}
+
+// Issue 13201
+func TestLanguageConfigSlice(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableKinds = ['page','rss','section','sitemap','taxonomy','term']
+[languages.en]
+title = 'TITLE_EN'
+weight = 2
+[languages.de]
+title = 'TITLE_DE'
+weight = 1
+[languages.fr]
+title = 'TITLE_FR'
+weight = 3
+`
+
+	b := hugolib.Test(t, files)
+	b.Assert(b.H.Configs.LanguageConfigSlice[0].Title, qt.Equals, `TITLE_DE`)
+}
+
+func TestContentTypesDefault(t *testing.T) {
+	files := `
+-- hugo.toml --
+baseURL = "https://example.com"
+
+
+`
+
+	b := hugolib.Test(t, files)
+
+	ct := b.H.Configs.Base.ContentTypes
+	c := ct.Config
+	s := ct.SourceStructure.(map[string]media.ContentTypeConfig)
+
+	b.Assert(c.IsContentFile("foo.md"), qt.Equals, true)
+	b.Assert(len(s), qt.Equals, 6)
+}
+
+func TestMergeDeep(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+baseURL = "https://example.com"
+theme = ["theme1", "theme2"]
+_merge = "deep"
+-- themes/theme1/hugo.toml --
+[sitemap]
+filename = 'mysitemap.xml'
+[services]
+[services.googleAnalytics]
+id = 'foo bar'
+[taxonomies]
+  foo = 'bars'
+-- themes/theme2/config/_default/hugo.toml --
+[taxonomies]
+  bar = 'baz'
+-- layouts/home.html --
+GA ID: {{ site.Config.Services.GoogleAnalytics.ID }}.
+
+`
+
+	b := hugolib.Test(t, files)
+
+	conf := b.H.Configs
+	base := conf.Base
+
+	b.Assert(base.Environment, qt.Equals, hugo.EnvironmentProduction)
+	b.Assert(base.BaseURL, qt.Equals, "https://example.com")
+	b.Assert(base.Sitemap.Filename, qt.Equals, "mysitemap.xml")
+	b.Assert(base.Taxonomies, qt.DeepEquals, map[string]string{"bar": "baz", "foo": "bars"})
+
+	b.AssertFileContent("public/index.html", "GA ID: foo bar.")
+}
+
+func TestMergeDeepBuildStats(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+baseURL = "https://example.com"
+title = "Theme 1"
+_merge = "deep"
+[module]
+[module.hugoVersion]
+[[module.imports]]
+path = "theme1"
+-- themes/theme1/hugo.toml --
+[build]
+[build.buildStats]
+disableIDs = true
+enable     = true
+-- layouts/home.html --
+Home.
+
+`
+
+	b := hugolib.Test(t, files, hugolib.TestOptOsFs())
+
+	conf := b.H.Configs
+	base := conf.Base
+
+	b.Assert(base.Title, qt.Equals, "Theme 1")
+	b.Assert(len(base.Module.Imports), qt.Equals, 1)
+	b.Assert(base.Build.BuildStats.Enable, qt.Equals, true)
+	b.AssertFileExists("/hugo_stats.json", true)
+}
+
+func TestMergeDeepBuildStatsTheme(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+baseURL = "https://example.com"
+_merge = "deep"
+theme = ["theme1"]
+-- themes/theme1/hugo.toml --
+title = "Theme 1"
+[build]
+[build.buildStats]
+disableIDs = true
+enable     = true
+-- layouts/home.html --
+Home.
+
+`
+
+	b := hugolib.Test(t, files, hugolib.TestOptOsFs())
+
+	conf := b.H.Configs
+	base := conf.Base
+
+	b.Assert(base.Title, qt.Equals, "Theme 1")
+	b.Assert(len(base.Module.Imports), qt.Equals, 1)
+	b.Assert(base.Build.BuildStats.Enable, qt.Equals, true)
+	b.AssertFileExists("/hugo_stats.json", true)
+}
+
+func TestDefaultConfigLanguageBlankWhenNoEnglishExists(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+baseURL = "https://example.com"
+[languages]
+[languages.nn]
+weight = 20
+[languages.sv]
+weight = 10
+[languages.sv.taxonomies]
+  tag = "taggar"
+-- layouts/all.html --
+All.
+`
+
+	b := hugolib.Test(t, files)
+
+	b.Assert(b.H.Conf.DefaultContentLanguage(), qt.Equals, "sv")
+}
+
+func TestDefaultConfigEnvDisableLanguagesIssue13707(t *testing.T) {
+	t.Parallel()
+
+	files := `
+-- hugo.toml --
+disableLanguages = []
+[languages]
+[languages.en]
+weight = 1
+[languages.nn]
+weight = 2
+[languages.sv]
+weight = 3
+`
+
+	b := hugolib.Test(t, files, hugolib.TestOptWithConfig(func(conf *hugolib.IntegrationTestConfig) {
+		conf.Environ = []string{`HUGO_DISABLELANGUAGES=sv nn`}
+	}))
+
+	b.Assert(len(b.H.Sites), qt.Equals, 1)
+}

config/allconfig/alldecoders.go

@@ -163,6 +163,15 @@ var allDecoderSetups = map[string]decodeWeight{
 			return err
 		},
 	},
+	"contenttypes": {
+		key:    "contenttypes",
+		weight: 100, // This needs to be decoded after media types.
+		decode: func(d decodeWeight, p decodeConfig) error {
+			var err error
+			p.c.ContentTypes, err = media.DecodeContentTypes(p.p.GetStringMap(d.key), p.c.MediaTypes.Config)
+			return err
+		},
+	},
 	"mediatypes": {
 		key: "mediatypes",
 		decode: func(d decodeWeight, p decodeConfig) error {
@@ -240,14 +249,18 @@ var allDecoderSetups = map[string]decodeWeight{
 		key: "sitemap",
 		decode: func(d decodeWeight, p decodeConfig) error {
 			var err error
-			p.c.Sitemap, err = config.DecodeSitemap(config.SitemapConfig{Priority: -1, Filename: "sitemap.xml"}, p.p.GetStringMap(d.key))
+			if p.p.IsSet(d.key) {
+				p.c.Sitemap, err = config.DecodeSitemap(p.c.Sitemap, p.p.GetStringMap(d.key))
+			}
 			return err
 		},
 	},
 	"taxonomies": {
 		key: "taxonomies",
 		decode: func(d decodeWeight, p decodeConfig) error {
-			p.c.Taxonomies = maps.CleanConfigStringMapString(p.p.GetStringMapString(d.key))
+			if p.p.IsSet(d.key) {
+				p.c.Taxonomies = maps.CleanConfigStringMapString(p.p.GetStringMapString(d.key))
+			}
 			return nil
 		},
 	},
@@ -297,15 +310,17 @@ var allDecoderSetups = map[string]decodeWeight{
 			}
 
 			// Validate defaultContentLanguage.
-			var found bool
+			if p.c.DefaultContentLanguage != "" {
-			for lang := range p.c.Languages {
+				var found bool
-				if lang == p.c.DefaultContentLanguage {
+				for lang := range p.c.Languages {
-					found = true
+					if lang == p.c.DefaultContentLanguage {
-					break
+						found = true
+						break
+					}
+				}
+				if !found {
+					return fmt.Errorf("config value %q for defaultContentLanguage does not match any language definition", p.c.DefaultContentLanguage)
 				}
-			}
-			if !found {
-				return fmt.Errorf("config value %q for defaultContentLanguage does not match any language definition", p.c.DefaultContentLanguage)
 			}
 
 			return nil
@@ -315,7 +330,7 @@ var allDecoderSetups = map[string]decodeWeight{
 		key: "cascade",
 		decode: func(d decodeWeight, p decodeConfig) error {
 			var err error
-			p.c.Cascade, err = page.DecodeCascadeConfig(nil, p.p.Get(d.key))
+			p.c.Cascade, err = page.DecodeCascadeConfig(nil, true, p.p.Get(d.key))
 			return err
 		},
 	},
@@ -419,6 +434,8 @@ var allDecoderSetups = map[string]decodeWeight{
 				p.c.UglyURLs = vv
 			case string:
 				p.c.UglyURLs = vv == "true"
+			case maps.Params:
+				p.c.UglyURLs = cast.ToStringMapBool(maps.CleanConfigStringMap(vv))
 			default:
 				p.c.UglyURLs = cast.ToStringMapBool(v)
 			}

config/allconfig/configlanguage.go

@@ -137,15 +137,15 @@ func (c ConfigLanguage) Watching() bool {
 	return c.m.Base.Internal.Watch
 }
 
-func (c ConfigLanguage) NewIdentityManager(name string) identity.Manager {
+func (c ConfigLanguage) NewIdentityManager(name string, opts ...identity.ManagerOption) identity.Manager {
 	if !c.Watching() {
 		return identity.NopManager
 	}
-	return identity.NewManager(name)
+	return identity.NewManager(name, opts...)
 }
 
 func (c ConfigLanguage) ContentTypes() config.ContentTypesProvider {
-	return c.config.C.ContentTypes
+	return c.config.ContentTypes.Config
 }
 
 // GetConfigSection is mostly used in tests. The switch statement isn't complete, but what's in use.

config/allconfig/load.go

@@ -64,7 +64,7 @@ func LoadConfig(d ConfigSourceDescriptor) (*Configs, error) {
 		return nil, fmt.Errorf("failed to create config from result: %w", err)
 	}
 
-	moduleConfig, modulesClient, err := l.loadModules(configs)
+	moduleConfig, modulesClient, err := l.loadModules(configs, d.IgnoreModuleDoesNotExist)
 	if err != nil {
 		return nil, fmt.Errorf("failed to load modules: %w", err)
 	}
@@ -91,7 +91,7 @@ func LoadConfig(d ConfigSourceDescriptor) (*Configs, error) {
 		return nil, fmt.Errorf("failed to init config: %w", err)
 	}
 
-	loggers.InitGlobalLogger(d.Logger.Level(), configs.Base.PanicOnWarning)
+	loggers.SetGlobalLogger(d.Logger)
 
 	return configs, nil
 }
@@ -116,6 +116,9 @@ type ConfigSourceDescriptor struct {
 
 	// Defaults to os.Environ if not set.
 	Environ []string
+
+	// If set, this will be used to ignore the module does not exist error.
+	IgnoreModuleDoesNotExist bool
 }
 
 func (d ConfigSourceDescriptor) configFilenames() []string {
@@ -156,63 +159,9 @@ func (l configLoader) applyConfigAliases() error {
 
 func (l configLoader) applyDefaultConfig() error {
 	defaultSettings := maps.Params{
-		"baseURL":                              "",
+		// These dirs are used early/before we build the config struct.
-		"cleanDestinationDir":                  false,
+		"themesDir": "themes",
-		"watch":                                false,
+		"configDir": "config",
-		"contentDir":                           "content",
-		"resourceDir":                          "resources",
-		"publishDir":                           "public",
-		"publishDirOrig":                       "public",
-		"themesDir":                            "themes",
-		"assetDir":                             "assets",
-		"layoutDir":                            "layouts",
-		"i18nDir":                              "i18n",
-		"dataDir":                              "data",
-		"archetypeDir":                         "archetypes",
-		"configDir":                            "config",
-		"staticDir":                            "static",
-		"buildDrafts":                          false,
-		"buildFuture":                          false,
-		"buildExpired":                         false,
-		"params":                               maps.Params{},
-		"environment":                          hugo.EnvironmentProduction,
-		"uglyURLs":                             false,
-		"verbose":                              false,
-		"ignoreCache":                          false,
-		"canonifyURLs":                         false,
-		"relativeURLs":                         false,
-		"removePathAccents":                    false,
-		"titleCaseStyle":                       "AP",
-		"taxonomies":                           maps.Params{"tag": "tags", "category": "categories"},
-		"permalinks":                           maps.Params{},
-		"sitemap":                              maps.Params{"priority": -1, "filename": "sitemap.xml"},
-		"menus":                                maps.Params{},
-		"disableLiveReload":                    false,
-		"pluralizeListTitles":                  true,
-		"capitalizeListTitles":                 true,
-		"forceSyncStatic":                      false,
-		"footnoteAnchorPrefix":                 "",
-		"footnoteReturnLinkContents":           "",
-		"newContentEditor":                     "",
-		"paginate":                             0,  // Moved into the paginator struct in Hugo v0.128.0.
-		"paginatePath":                         "", // Moved into the paginator struct in Hugo v0.128.0.
-		"summaryLength":                        70,
-		"rssLimit":                             -1,
-		"sectionPagesMenu":                     "",
-		"disablePathToLower":                   false,
-		"hasCJKLanguage":                       false,
-		"enableEmoji":                          false,
-		"defaultContentLanguage":               "en",
-		"defaultContentLanguageInSubdir":       false,
-		"enableMissingTranslationPlaceholders": false,
-		"enableGitInfo":                        false,
-		"ignoreFiles":                          make([]string, 0),
-		"disableAliases":                       false,
-		"debug":                                false,
-		"disableFastRender":                    false,
-		"timeout":                              "30s",
-		"timeZone":                             "",
-		"enableInlineShortcodes":               false,
 	}
 
 	l.cfg.SetDefaults(defaultSettings)
@@ -284,40 +233,51 @@ func (l configLoader) applyOsEnvOverrides(environ []string) error {
 
 		if existing != nil {
 			val, err := metadecoders.Default.UnmarshalStringTo(env.Value, existing)
-			if err != nil {
+			if err == nil {
+				val = l.envValToVal(env.Key, val)
+				if owner != nil {
+					owner[nestedKey] = val
+				} else {
+					l.cfg.Set(env.Key, val)
+				}
 				continue
 			}
-
-			if owner != nil {
-				owner[nestedKey] = val
-			} else {
-				l.cfg.Set(env.Key, val)
-			}
-		} else {
-			if nestedKey != "" {
-				owner[nestedKey] = env.Value
-			} else {
-				var val any
-				key := strings.ReplaceAll(env.Key, delim, ".")
-				_, ok := allDecoderSetups[key]
-				if ok {
-					// A map.
-					if v, err := metadecoders.Default.UnmarshalStringTo(env.Value, map[string]interface{}{}); err == nil {
-						val = v
-					}
-				}
-				if val == nil {
-					// A string.
-					val = l.envStringToVal(key, env.Value)
-				}
-				l.cfg.Set(key, val)
-			}
 		}
+
+		if owner != nil && nestedKey != "" {
+			owner[nestedKey] = env.Value
+		} else {
+			var val any
+			key := strings.ReplaceAll(env.Key, delim, ".")
+			_, ok := allDecoderSetups[key]
+			if ok {
+				// A map.
+				if v, err := metadecoders.Default.UnmarshalStringTo(env.Value, map[string]any{}); err == nil {
+					val = v
+				}
+			}
+
+			if val == nil {
+				// A string.
+				val = l.envStringToVal(key, env.Value)
+			}
+			l.cfg.Set(key, val)
+		}
+
 	}
 
 	return nil
 }
 
+func (l *configLoader) envValToVal(k string, v any) any {
+	switch v := v.(type) {
+	case string:
+		return l.envStringToVal(k, v)
+	default:
+		return v
+	}
+}
+
 func (l *configLoader) envStringToVal(k, v string) any {
 	switch k {
 	case "disablekinds", "disablelanguages":
@@ -453,7 +413,7 @@ func (l *configLoader) loadConfigMain(d ConfigSourceDescriptor) (config.LoadConf
 	return res, l.ModulesConfig, err
 }
 
-func (l *configLoader) loadModules(configs *Configs) (modules.ModulesConfig, *modules.Client, error) {
+func (l *configLoader) loadModules(configs *Configs, ignoreModuleDoesNotExist bool) (modules.ModulesConfig, *modules.Client, error) {
 	bcfg := configs.LoadingInfo.BaseConfig
 	conf := configs.Base
 	workingDir := bcfg.WorkingDir
@@ -467,7 +427,7 @@ func (l *configLoader) loadModules(configs *Configs) (modules.ModulesConfig, *mo
 		ignoreVendor, _ = hglob.GetGlob(hglob.NormalizePath(s))
 	}
 
-	ex := hexec.New(conf.Security, workingDir)
+	ex := hexec.New(conf.Security, workingDir, l.Logger)
 
 	hook := func(m *modules.ModulesConfig) error {
 		for _, tc := range m.AllModules {
@@ -487,17 +447,18 @@ func (l *configLoader) loadModules(configs *Configs) (modules.ModulesConfig, *mo
 	}
 
 	modulesClient := modules.NewClient(modules.ClientConfig{
-		Fs:                 l.Fs,
+		Fs:                       l.Fs,
-		Logger:             l.Logger,
+		Logger:                   l.Logger,
-		Exec:               ex,
+		Exec:                     ex,
-		HookBeforeFinalize: hook,
+		HookBeforeFinalize:       hook,
-		WorkingDir:         workingDir,
+		WorkingDir:               workingDir,
-		ThemesDir:          themesDir,
+		ThemesDir:                themesDir,
-		PublishDir:         publishDir,
+		PublishDir:               publishDir,
-		Environment:        l.Environment,
+		Environment:              l.Environment,
-		CacheDir:           conf.Caches.CacheDirModules(),
+		CacheDir:                 conf.Caches.CacheDirModules(),
-		ModuleConfig:       conf.Module,
+		ModuleConfig:             conf.Module,
-		IgnoreVendor:       ignoreVendor,
+		IgnoreVendor:             ignoreVendor,
+		IgnoreModuleDoesNotExist: ignoreModuleDoesNotExist,
 	})
 
 	moduleConfig, err := modulesClient.Collect()

config/commonConfig.go

@@ -15,7 +15,9 @@ package config
 
 import (
 	"fmt"
+	"net/http"
 	"regexp"
+	"slices"
 	"sort"
 	"strings"
 
@@ -127,7 +129,7 @@ func (w BuildStats) Enabled() bool {
 }
 
 func (b BuildConfig) clone() BuildConfig {
-	b.CacheBusters = append([]CacheBuster{}, b.CacheBusters...)
+	b.CacheBusters = slices.Clone(b.CacheBusters)
 	return b
 }
 
@@ -226,7 +228,22 @@ type Server struct {
 	Redirects []Redirect
 
 	compiledHeaders   []glob.Glob
-	compiledRedirects []glob.Glob
+	compiledRedirects []redirect
+}
+
+type redirect struct {
+	from    glob.Glob
+	fromRe  *regexp.Regexp
+	headers map[string]glob.Glob
+}
+
+func (r redirect) matchHeader(header http.Header) bool {
+	for k, v := range r.headers {
+		if !v.Match(header.Get(k)) {
+			return false
+		}
+	}
+	return true
 }
 
 func (s *Server) CompileConfig(logger loggers.Logger) error {
@@ -234,10 +251,41 @@ func (s *Server) CompileConfig(logger loggers.Logger) error {
 		return nil
 	}
 	for _, h := range s.Headers {
-		s.compiledHeaders = append(s.compiledHeaders, glob.MustCompile(h.For))
+		g, err := glob.Compile(h.For)
+		if err != nil {
+			return fmt.Errorf("failed to compile Headers glob %q: %w", h.For, err)
+		}
+		s.compiledHeaders = append(s.compiledHeaders, g)
 	}
 	for _, r := range s.Redirects {
-		s.compiledRedirects = append(s.compiledRedirects, glob.MustCompile(r.From))
+		if r.From == "" && r.FromRe == "" {
+			return fmt.Errorf("redirects must have either From or FromRe set")
+		}
+		rd := redirect{
+			headers: make(map[string]glob.Glob),
+		}
+		if r.From != "" {
+			g, err := glob.Compile(r.From)
+			if err != nil {
+				return fmt.Errorf("failed to compile Redirect glob %q: %w", r.From, err)
+			}
+			rd.from = g
+		}
+		if r.FromRe != "" {
+			re, err := regexp.Compile(r.FromRe)
+			if err != nil {
+				return fmt.Errorf("failed to compile Redirect regexp %q: %w", r.FromRe, err)
+			}
+			rd.fromRe = re
+		}
+		for k, v := range r.FromHeaders {
+			g, err := glob.Compile(v)
+			if err != nil {
+				return fmt.Errorf("failed to compile Redirect header glob %q: %w", v, err)
+			}
+			rd.headers[k] = g
+		}
+		s.compiledRedirects = append(s.compiledRedirects, rd)
 	}
 
 	return nil
@@ -266,22 +314,42 @@ func (s *Server) MatchHeaders(pattern string) []types.KeyValueStr {
 	return matches
 }
 
-func (s *Server) MatchRedirect(pattern string) Redirect {
+func (s *Server) MatchRedirect(pattern string, header http.Header) Redirect {
 	if s.compiledRedirects == nil {
 		return Redirect{}
 	}
 
 	pattern = strings.TrimSuffix(pattern, "index.html")
 
-	for i, g := range s.compiledRedirects {
+	for i, r := range s.compiledRedirects {
 		redir := s.Redirects[i]
 
-		// No redirect to self.
+		var found bool
-		if redir.To == pattern {
+
-			return Redirect{}
+		if r.from != nil {
+			if r.from.Match(pattern) {
+				found = header == nil || r.matchHeader(header)
+				// We need to do regexp group replacements if needed.
+			}
 		}
 
-		if g.Match(pattern) {
+		if r.fromRe != nil {
+			m := r.fromRe.FindStringSubmatch(pattern)
+			if m != nil {
+				if !found {
+					found = header == nil || r.matchHeader(header)
+				}
+
+				if found {
+					// Replace $1, $2 etc. in To.
+					for i, g := range m[1:] {
+						redir.To = strings.ReplaceAll(redir.To, fmt.Sprintf("$%d", i+1), g)
+					}
+				}
+			}
+		}
+
+		if found {
 			return redir
 		}
 	}
@@ -295,8 +363,22 @@ type Headers struct {
 }
 
 type Redirect struct {
+	// From is the Glob pattern to match.
+	// One of From or FromRe must be set.
 	From string
-	To   string
+
+	// FromRe is the regexp to match.
+	// This regexp can contain group matches (e.g. $1) that can be used in the To field.
+	// One of From or FromRe must be set.
+	FromRe string
+
+	// To is the target URL.
+	To string
+
+	// Headers to match for the redirect.
+	// This maps the HTTP header name to a Glob pattern with values to match.
+	// If the map is empty, the redirect will always be triggered.
+	FromHeaders map[string]string
 
 	// HTTP status code to use for the redirect.
 	// A status code of 200 will trigger a URL rewrite.
@@ -369,7 +451,7 @@ func (c *CacheBuster) CompileConfig(logger loggers.Logger) error {
 }
 
 func (r Redirect) IsZero() bool {
-	return r.From == ""
+	return r.From == "" && r.FromRe == ""
 }
 
 const (
@@ -383,17 +465,7 @@ func DecodeServer(cfg Provider) (Server, error) {
 	_ = mapstructure.WeakDecode(cfg.GetStringMap("server"), s)
 
 	for i, redir := range s.Redirects {
-		// Get it in line with the Hugo server for OK responses.
+		redir.To = strings.TrimSuffix(redir.To, "index.html")
-		// We currently treat the 404 as a special case, they are always "ugly", so keep them as is.
-		if redir.Status != 404 {
-			redir.To = strings.TrimSuffix(redir.To, "index.html")
-			if !strings.HasPrefix(redir.To, "https") && !strings.HasSuffix(redir.To, "/") {
-				// There are some tricky infinite loop situations when dealing
-				// when the target does not have a trailing slash.
-				// This can certainly be handled better, but not time for that now.
-				return Server{}, fmt.Errorf("unsupported redirect to value %q in server config; currently this must be either a remote destination or a local folder, e.g. \"/blog/\" or \"/blog/index.html\"", redir.To)
-			}
-		}
 		s.Redirects[i] = redir
 	}
 
@@ -401,7 +473,7 @@ func DecodeServer(cfg Provider) (Server, error) {
 		// Set up a default redirect for 404s.
 		s.Redirects = []Redirect{
 			{
-				From:   "**",
+				From:   "/**",
 				To:     "/404.html",
 				Status: 404,
 			},

config/commonConfig_test.go

@@ -71,7 +71,28 @@ X-Content-Type-Options = "nosniff"
 
 [[server.redirects]]
 from = "/foo/**"
-to = "/foo/index.html"
+to = "/baz/index.html"
+status = 200
+
+[[server.redirects]]
+from = "/loop/**"
+to = "/loop/foo/"
+status = 200
+
+[[server.redirects]]
+from = "/b/**"
+fromRe = "/b/(.*)/"
+to = "/baz/$1/"
+status = 200
+
+[[server.redirects]]
+fromRe = "/c/(.*)/"
+to = "/boo/$1/"
+status = 200
+
+[[server.redirects]]
+fromRe = "/d/(.*)/"
+to = "/boo/$1/"
 status = 200
 
 [[server.redirects]]
@@ -79,11 +100,6 @@ from = "/google/**"
 to = "https://google.com/"
 status = 301
 
-[[server.redirects]]
-from = "/**"
-to = "/default/index.html"
-status = 301
-
 
 
 `, "toml")
@@ -100,45 +116,35 @@ status = 301
 		{Key: "X-XSS-Protection", Value: "1; mode=block"},
 	})
 
-	c.Assert(s.MatchRedirect("/foo/bar/baz"), qt.DeepEquals, Redirect{
+	c.Assert(s.MatchRedirect("/foo/bar/baz", nil), qt.DeepEquals, Redirect{
 		From:   "/foo/**",
-		To:     "/foo/",
+		To:     "/baz/",
 		Status: 200,
 	})
 
-	c.Assert(s.MatchRedirect("/someother"), qt.DeepEquals, Redirect{
+	c.Assert(s.MatchRedirect("/foo/bar/", nil), qt.DeepEquals, Redirect{
-		From:   "/**",
+		From:   "/foo/**",
-		To:     "/default/",
+		To:     "/baz/",
-		Status: 301,
+		Status: 200,
 	})
 
-	c.Assert(s.MatchRedirect("/google/foo"), qt.DeepEquals, Redirect{
+	c.Assert(s.MatchRedirect("/b/c/", nil), qt.DeepEquals, Redirect{
+		From:   "/b/**",
+		FromRe: "/b/(.*)/",
+		To:     "/baz/c/",
+		Status: 200,
+	})
+
+	c.Assert(s.MatchRedirect("/c/d/", nil).To, qt.Equals, "/boo/d/")
+	c.Assert(s.MatchRedirect("/c/d/e/", nil).To, qt.Equals, "/boo/d/e/")
+
+	c.Assert(s.MatchRedirect("/someother", nil), qt.DeepEquals, Redirect{})
+
+	c.Assert(s.MatchRedirect("/google/foo", nil), qt.DeepEquals, Redirect{
 		From:   "/google/**",
 		To:     "https://google.com/",
 		Status: 301,
 	})
-
-	// No redirect loop, please.
-	c.Assert(s.MatchRedirect("/default/index.html"), qt.DeepEquals, Redirect{})
-	c.Assert(s.MatchRedirect("/default/"), qt.DeepEquals, Redirect{})
-
-	for _, errorCase := range []string{
-		`[[server.redirects]]
-from = "/**"
-to = "/file"
-status = 301`,
-		`[[server.redirects]]
-from = "/**"
-to = "/foo/file.html"
-status = 301`,
-	} {
-
-		cfg, err := FromConfigString(errorCase, "toml")
-		c.Assert(err, qt.IsNil)
-		_, err = DecodeServer(cfg)
-		c.Assert(err, qt.Not(qt.IsNil))
-
-	}
 }
 
 func TestBuildConfigCacheBusters(t *testing.T) {
@@ -160,7 +166,7 @@ func TestBuildConfigCacheBusters(t *testing.T) {
 func TestBuildConfigCacheBusterstTailwindSetup(t *testing.T) {
 	c := qt.New(t)
 	cfg := New()
-	cfg.Set("build", map[string]interface{}{
+	cfg.Set("build", map[string]any{
 		"cacheBusters": []map[string]string{
 			{
 				"source": "assets/watching/hugo_stats\\.json",

config/configProvider.go

@@ -58,7 +58,7 @@ type AllProvider interface {
 	BuildDrafts() bool
 	Running() bool
 	Watching() bool
-	NewIdentityManager(name string) identity.Manager
+	NewIdentityManager(name string, opts ...identity.ManagerOption) identity.Manager
 	FastRenderMode() bool
 	PrintUnusedTemplates() bool
 	EnableMissingTranslationPlaceholders() bool
@@ -76,7 +76,7 @@ type AllProvider interface {
 }
 
 // We cannot import the media package as that would create a circular dependency.
-// This interface defineds a sub set of what media.ContentTypes provides.
+// This interface defines a subset of what media.ContentTypes provides.
 type ContentTypesProvider interface {
 	IsContentSuffix(suffix string) bool
 	IsContentFile(filename string) bool

config/defaultConfigProvider.go

@@ -15,7 +15,6 @@ package config
 
 import (
 	"fmt"
-	"sort"
 	"strings"
 	"sync"
 
@@ -26,42 +25,6 @@ import (
 	"github.com/gohugoio/hugo/common/maps"
 )
 
-var (
-
-	// ConfigRootKeysSet contains all of the config map root keys.
-	ConfigRootKeysSet = map[string]bool{
-		"build":         true,
-		"caches":        true,
-		"cascade":       true,
-		"frontmatter":   true,
-		"languages":     true,
-		"imaging":       true,
-		"markup":        true,
-		"mediatypes":    true,
-		"menus":         true,
-		"minify":        true,
-		"module":        true,
-		"outputformats": true,
-		"params":        true,
-		"permalinks":    true,
-		"related":       true,
-		"sitemap":       true,
-		"privacy":       true,
-		"security":      true,
-		"taxonomies":    true,
-	}
-
-	// ConfigRootKeys is a sorted version of ConfigRootKeysSet.
-	ConfigRootKeys []string
-)
-
-func init() {
-	for k := range ConfigRootKeysSet {
-		ConfigRootKeys = append(ConfigRootKeys, k)
-	}
-	sort.Strings(ConfigRootKeys)
-}
-
 // New creates a Provider backed by an empty maps.Params.
 func New() Provider {
 	return &defaultConfigProvider{
@@ -382,7 +345,7 @@ func (c *defaultConfigProvider) getNestedKeyAndMap(key string, create bool) (str
 		c.keyCache.Store(key, parts)
 	}
 	current := c.root
-	for i := 0; i < len(parts)-1; i++ {
+	for i := range len(parts) - 1 {
 		next, found := current[parts[i]]
 		if !found {
 			if create {

config/defaultConfigProvider_test.go

@@ -332,7 +332,7 @@ func TestDefaultConfigProvider(t *testing.T) {
 			return nil
 		}
 
-		for i := 0; i < 20; i++ {
+		for i := range 20 {
 			i := i
 			r.Run(func() error {
 				const v = 42

config/namespace.go

@@ -22,7 +22,7 @@ import (
 func DecodeNamespace[S, C any](configSource any, buildConfig func(any) (C, any, error)) (*ConfigNamespace[S, C], error) {
 	// Calculate the hash of the input (not including any defaults applied later).
 	// This allows us to introduce new config options without breaking the hash.
-	h := hashing.HashString(configSource)
+	h := hashing.HashStringHex(configSource)
 
 	// Build the config
 	c, ext, err := buildConfig(configSource)