Update status and code index after changing the default branch (#27018)

Fix #26723 
Add `ChangeDefaultBranch` to the `notifier` interface and implement it
in `indexerNotifier`. So when changing the default branch,
`indexerNotifier` sends a message to the `indexer queue` to update the
index.

---------

Co-authored-by: techknowlogick <matti@mdranta.net>

4 files changed, 22 insertions, 0 deletions

diff --git a/services/indexer/notify.go b/services/indexer/notify.go
index 22306c691b..a07bf38b06 100644
--- a/services/indexer/notify.go
+++ b/services/indexer/notify.go
@@ -110,6 +110,15 @@ func (r *indexerNotifier) SyncPushCommits(ctx context.Context, pusher *user_mode
 	}
 }
 
+func (r *indexerNotifier) ChangeDefaultBranch(ctx context.Context, repo *repo_model.Repository) {
+	if setting.Indexer.RepoIndexerEnabled && !repo.IsEmpty {
+		code_indexer.UpdateRepoIndexer(repo)
+	}
+	if err := stats_indexer.UpdateRepoIndexer(repo); err != nil {
+		log.Error("stats_indexer.UpdateRepoIndexer(%d) failed: %v", repo.ID, err)
+	}
+}
+
 func (r *indexerNotifier) IssueChangeContent(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, oldContent string) {
 	issue_indexer.UpdateIssueIndexer(issue.ID)
 }
diff --git a/services/notify/notifier.go b/services/notify/notifier.go
index d1dbe44c11..ed053a812a 100644
--- a/services/notify/notifier.go
+++ b/services/notify/notifier.go
@@ -72,4 +72,6 @@ type Notifier interface {
 
 	PackageCreate(ctx context.Context, doer *user_model.User, pd *packages_model.PackageDescriptor)
 	PackageDelete(ctx context.Context, doer *user_model.User, pd *packages_model.PackageDescriptor)
+
+	ChangeDefaultBranch(ctx context.Context, repo *repo_model.Repository)
 }
diff --git a/services/notify/notify.go b/services/notify/notify.go
index 71bc1c7d58..16fbb6325d 100644
--- a/services/notify/notify.go
+++ b/services/notify/notify.go
@@ -360,3 +360,10 @@ func PackageDelete(ctx context.Context, doer *user_model.User, pd *packages_mode
 		notifier.PackageDelete(ctx, doer, pd)
 	}
 }
+
+// ChangeDefaultBranch notifies change default branch to notifiers
+func ChangeDefaultBranch(ctx context.Context, repo *repo_model.Repository) {
+	for _, notifier := range notifiers {
+		notifier.ChangeDefaultBranch(ctx, repo)
+	}
+}
diff --git a/services/notify/null.go b/services/notify/null.go
index c5b31f83d6..dddd421bef 100644
--- a/services/notify/null.go
+++ b/services/notify/null.go
@@ -204,3 +204,7 @@ func (*NullNotifier) PackageCreate(ctx context.Context, doer *user_model.User, p
 // PackageDelete places a place holder function
 func (*NullNotifier) PackageDelete(ctx context.Context, doer *user_model.User, pd *packages_model.PackageDescriptor) {
 }
+
+// ChangeDefaultBranch places a place holder function
+func (*NullNotifier) ChangeDefaultBranch(ctx context.Context, repo *repo_model.Repository) {
+}