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chore: simplify GetDiff (#7682)

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- Split `GetDiff` into two functions, `GetDiffSimple` and `GetDiffFull`. The former will do the bare minimum and really only get a Git diff while the latter does some extra stuff that's relevant for the frontend to show extra relevant.
- Use `GetDiffSimple` for API related calls, as they do not benefit nor are returning the extra information that `GetDiffFull` provides, this should show a measurable performance increase for API calls that returns commits and `/repos/{owner}/{repo}/pulls/{index}/files`.
- `GetDiffSimple` contains extra code comments about its interesting way to determine the before commit.
- Add unit tests to demonstrates that the logic for determining the before commit didn't change and the function still yields correct information.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/7682
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Gusted <postmaster@gusted.xyz>
Co-committed-by: Gusted <postmaster@gusted.xyz>
This commit is contained in:
Gusted 2025-04-27 19:49:59 +00:00 • committed by Earl Warren
parent afcb7262ea
commit 00761a15d1
7 changed files with 124 additions and 39 deletions
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2
routers/web/repo/pull.go
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@ -981,7 +981,7 @@ func viewPullFiles(ctx *context.Context, specifiedStartCommit, specifiedEndCommi
// as the viewed information is designed to be loaded only on latest PR
// diff and if you're signed in.
if !ctx.IsSigned || willShowSpecifiedCommit || willShowSpecifiedCommitRange {
diff, err = gitdiff.GetDiff(ctx, gitRepo, diffOptions, files...)
diff, err = gitdiff.GetDiffFull(ctx, gitRepo, diffOptions, files...)
methodWithError = "GetDiff"
} else {
diff, err = gitdiff.SyncAndGetUserSpecificDiff(ctx, ctx.Doer.ID, pull, gitRepo, diffOptions, files...)