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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_rebase.go
+4 -2
View File
@@ -73,8 +73,10 @@ func doMergeRebaseFastForward(ctx *mergeContext) error {
}
if newMessage != "" {
cmdCommit := gitcmd.NewCommand("commit", "--amend").
AddOptionFormat("--message=%s", newMessage)
cmdCommit := gitcmd.NewCommand("commit", "--amend")
if err = git.AddObjectMessageArgument(cmdCommit, git.ObjectCommit, newMessage); err != nil {
return err
}
addCommitSigningOptions(cmdCommit, ctx.signKey)
if err := cmdCommit.WithRepo(ctx.tmpRepo).Run(ctx); err != nil {
log.Error("Unable to amend commit message: %v", err)