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fix: pass merge commit messages to git via stdin (#39269)

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`git commit --message=` passes the merge message as a single argument,
which Linux caps at 128 KiB and Windows at 32 KiB for the whole command
line. Long messages failed with `argument list too long` and the merge
box toast showed the raw HTML 500 page.

Pass the message via `--file=-` on stdin instead, and answer
fetch-action requests with JSON on server errors so the toast shows the
error text. Limits merge commit messages to 512KB which could be
extended or made configurable later.

Fixes: https://github.com/go-gitea/gitea/issues/39261
Fixes: https://github.com/go-gitea/gitea/issues/30276
Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
silverwind
2026-09-19 13:04:53 +00:00
committed by GitHub
co-authored by wxiaoguang
parent cc34c26172
commit cdf786ce92
21 changed files with 175 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files
services/pull/merge.go
+4 -1
View File
@@ -460,7 +460,10 @@ func doMergeAndPush(ctx context.Context, pr *issues_model.PullRequest, doer *use
}
func commitAndSignNoAuthor(ctx *mergeContext, message string) error {
cmdCommit := gitcmd.NewCommand("commit").AddOptionFormat("--message=%s", message)
cmdCommit := gitcmd.NewCommand("commit")
if err := git.AddObjectMessageArgument(cmdCommit, git.ObjectCommit, message); err != nil {
return err
}
addCommitSigningOptions(cmdCommit, ctx.signKey)
if err := ctx.PrepareGitCmd(cmdCommit).RunWithStderr(ctx); err != nil {
return fmt.Errorf("git commit %v: %w\n%s", ctx.pr, err, ctx.outbuf.String())