Create new branch from branch selection dropdown (#2130)

* Create new branch from branch selection dropdown and rewrite it to VueJS

* Make updateLocalCopyToCommit as not exported

* Move branch name validation to model

* Fix possible race condition

modules/auth/repo_branch_form.go

@@ -0,0 +1,20 @@
+// Copyright 2017 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package auth
+
+import (
+	"github.com/go-macaron/binding"
+	macaron "gopkg.in/macaron.v1"
+)
+
+// NewBranchForm form for creating a new branch
+type NewBranchForm struct {
+	NewBranchName string `binding:"Required;MaxSize(100);GitRefName"`
+}
+
+// Validate validates the fields
+func (f *NewBranchForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
+	return validate(errs, ctx.Data, f, ctx.Locale)
+}

modules/context/repo.go

@@ -76,6 +76,11 @@ func (r *Repository) CanEnableEditor() bool {
 	return r.Repository.CanEnableEditor() && r.IsViewBranch && r.IsWriter()
 }
 
+// CanCreateBranch returns true if repository is editable and user has proper access level.
+func (r *Repository) CanCreateBranch() bool {
+	return r.Repository.CanCreateBranch() && r.IsWriter()
+}
+
 // CanCommitToBranch returns true if repository is editable and user has proper access level
 //   and branch is not protected
 func (r *Repository) CanCommitToBranch(doer *models.User) (bool, error) {
@@ -528,6 +533,7 @@ func RepoRef() macaron.Handler {
 		ctx.Data["IsViewBranch"] = ctx.Repo.IsViewBranch
 		ctx.Data["IsViewTag"] = ctx.Repo.IsViewTag
 		ctx.Data["IsViewCommit"] = ctx.Repo.IsViewCommit
+		ctx.Data["CanCreateBranch"] = ctx.Repo.CanCreateBranch()
 
 		ctx.Repo.CommitsCount, err = ctx.Repo.Commit.CommitsCount()
 		if err != nil {

modules/validation/binding.go

@@ -44,12 +44,18 @@ func addGitRefNameBindingRule() {
 			}
 			// Additional rules as described at https://www.kernel.org/pub/software/scm/git/docs/git-check-ref-format.html
 			if strings.HasPrefix(str, "/") || strings.HasSuffix(str, "/") ||
-				strings.HasPrefix(str, ".") || strings.HasSuffix(str, ".") ||
-				strings.HasSuffix(str, ".lock") ||
-				strings.Contains(str, "..") || strings.Contains(str, "//") {
+				strings.HasSuffix(str, ".") || strings.Contains(str, "..") ||
+				strings.Contains(str, "//") {
 				errs.Add([]string{name}, ErrGitRefName, "GitRefName")
 				return false, errs
 			}
+			parts := strings.Split(str, "/")
+			for _, part := range parts {
+				if strings.HasSuffix(part, ".lock") || strings.HasPrefix(part, ".") {
+					errs.Add([]string{name}, ErrGitRefName, "GitRefName")
+					return false, errs
+				}
+			}
 
 			return true, errs
 		},