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

`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
+5 -4
View File
@@ -67,10 +67,11 @@ func doMergeStyleSquash(ctx *mergeContext, message string) error {
if setting.Repository.PullRequest.AddCoCommitterTrailers && ctx.committer.String() != sig.String() {
message = AddCommitMessageTailer(message, git.CoAuthoredByTrailer, sig.String())
}
cmdCommit := gitcmd.NewCommand("commit").
AddOptionFormat("--author='%s <%s>'", sig.Name, sig.Email).
AddOptionFormat("--message=%s", message).
AddArguments("--allow-empty")
cmdCommit := gitcmd.NewCommand("commit", "--allow-empty").
AddOptionFormat("--author='%s <%s>'", sig.Name, sig.Email)
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 {
log.Error("git commit %-v: %v\n%s\n%s", ctx.pr, err, ctx.outbuf.String(), err.Stderr())