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feat(api): support ref suffixes in compare (#38148)

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Compare API requests with a `^` or `~N` revision suffix (for example
`compare/main...feature^`) were rejected with `400 Unsupported
comparison syntax: ref with suffix`. The fix resolves the suffix to a
commit before comparing, so `base...head^` and `~N` work on either side,
the same as git.

Only `^`/`~N` navigation is resolved. Pull request creation still
requires plain branch refs, and the web compare page keeps rejecting
suffixes since its branch selectors need separate UI work.

Closes #33943
This commit is contained in:
Eyüp Can Akman
2026-06-24 08:38:02 +03:00
committed by GitHub
parent 59d4825a95
commit ef927f9fa3
11 changed files with 246 additions and 34 deletions
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routers/api/v1/repo/pull.go
+11 -9
View File
@@ -1087,12 +1087,6 @@ func parseCompareInfo(ctx *context.APIContext, compareParam string) (result *git
baseRepo := ctx.Repo.Repository
compareReq := common.ParseCompareRouterParam(compareParam)
// remove the check when we support compare with carets
if compareReq.BaseOriRefSuffix != "" {
ctx.APIError(http.StatusBadRequest, "Unsupported comparison syntax: ref with suffix")
return nil, nil
}
_, headRepo, err := common.GetHeadOwnerAndRepo(ctx, baseRepo, compareReq)
switch {
case errors.Is(err, util.ErrInvalidArgument):
@@ -1152,10 +1146,18 @@ func parseCompareInfo(ctx *context.APIContext, compareParam string) (result *git
return nil, nil
}
baseRef := ctx.Repo.GitRepo.UnstableGuessRefByShortName(util.IfZero(compareReq.BaseOriRef, baseRepo.GetPullRequestTargetBranch(ctx)))
headRef := headGitRepo.UnstableGuessRefByShortName(util.IfZero(compareReq.HeadOriRef, headRepo.DefaultBranch))
baseRef, err := common.ResolveRefWithSuffix(ctx.Repo.GitRepo, util.IfZero(compareReq.BaseOriRef, baseRepo.GetPullRequestTargetBranch(ctx)), compareReq.BaseOriRefSuffix)
if err != nil {
ctx.APIErrorAuto(err)
return nil, nil
}
headRef, err := common.ResolveRefWithSuffix(headGitRepo, util.IfZero(compareReq.HeadOriRef, headRepo.DefaultBranch), compareReq.HeadOriRefSuffix)
if err != nil {
ctx.APIErrorAuto(err)
return nil, nil
}
log.Trace("Repo path: %q, base ref: %q->%q, head ref: %q->%q", ctx.Repo.Repository.RelativePath(), compareReq.BaseOriRef, baseRef, compareReq.HeadOriRef, headRef)
log.Trace("Repo path: %q, base ref: %q->%q, head ref: %q->%q", ctx.Repo.Repository.RelativePath(), compareReq.BaseOriRef+compareReq.BaseOriRefSuffix, baseRef, compareReq.HeadOriRef+compareReq.HeadOriRefSuffix, headRef)
baseRefValid := baseRef.IsBranch() || baseRef.IsTag() || git.IsStringLikelyCommitID(git.ObjectFormatFromName(ctx.Repo.Repository.ObjectFormatName), baseRef.ShortName())
headRefValid := headRef.IsBranch() || headRef.IsTag() || git.IsStringLikelyCommitID(git.ObjectFormatFromName(headRepo.ObjectFormatName), headRef.ShortName())