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Abort merge if head has been updated before pressing merge (#18032)

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* Abort merge if head has been updated before pressing merge

It is possible that a PR head may be pushed to between the merge page being shown
and the merge button being pressed. Pass the current expected head in as a parameter
and cancel the merge if it has changed.

Fix #18028

Signed-off-by: Andrew Thornton <art27@cantab.net>

* adjust swagger

Signed-off-by: Andrew Thornton <art27@cantab.net>

* fix test

Signed-off-by: Andrew Thornton <art27@cantab.net>

* placate lint

Signed-off-by: Andrew Thornton <art27@cantab.net>
This commit is contained in:
zeripath 2021-12-20 00:32:54 +00:00 • committed by GitHub
parent b24a965b81
commit e4e411821d
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9 changed files with 42 additions and 9 deletions
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5
routers/api/v1/repo/pull.go
View file

@ -838,7 +838,7 @@ func MergePullRequest(ctx *context.APIContext) {
message += "\n\n" + form.MergeMessageField
}
if err := pull_service.Merge(pr, ctx.User, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), message); err != nil {
if err := pull_service.Merge(pr, ctx.User, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), form.HeadCommitID, message); err != nil {
if models.IsErrInvalidMergeStyle(err) {
ctx.Error(http.StatusMethodNotAllowed, "Invalid merge style", fmt.Errorf("%s is not allowed an allowed merge style for this repository", repo_model.MergeStyle(form.Do)))
return
@ -854,6 +854,9 @@ func MergePullRequest(ctx *context.APIContext) {
} else if git.IsErrPushOutOfDate(err) {
ctx.Error(http.StatusConflict, "Merge", "merge push out of date")
return
} else if models.IsErrSHADoesNotMatch(err) {
ctx.Error(http.StatusConflict, "Merge", "head out of date")
return
} else if git.IsErrPushRejected(err) {
errPushRej := err.(*git.ErrPushRejected)
if len(errPushRej.Message) == 0 {

7
routers/web/repo/pull.go
View file

@ -933,7 +933,7 @@ func MergePullRequest(ctx *context.Context) {
return
}
if err = pull_service.Merge(pr, ctx.User, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), message); err != nil {
if err = pull_service.Merge(pr, ctx.User, ctx.Repo.GitRepo, repo_model.MergeStyle(form.Do), form.HeadCommitID, message); err != nil {
if models.IsErrInvalidMergeStyle(err) {
ctx.Flash.Error(ctx.Tr("repo.pulls.invalid_merge_option"))
ctx.Redirect(issue.Link())
@ -976,6 +976,11 @@ func MergePullRequest(ctx *context.Context) {
ctx.Flash.Error(ctx.Tr("repo.pulls.merge_out_of_date"))
ctx.Redirect(issue.Link())
return
} else if models.IsErrSHADoesNotMatch(err) {
log.Debug("MergeHeadOutOfDate error: %v", err)
ctx.Flash.Error(ctx.Tr("repo.pulls.head_out_of_date"))
ctx.Redirect(issue.Link())
return
} else if git.IsErrPushRejected(err) {
log.Debug("MergePushRejected error: %v", err)
pushrejErr := err.(*git.ErrPushRejected)