Make wiki default branch name changable (#29603)

Fix #29000
Fix #28685
Fix #18568

Related: #27497

And by the way fix #24036, add a Cancel button there (one line)

1 files changed, 18 insertions, 0 deletions

diff --git a/models/migrations/v1_22/v289.go b/models/migrations/v1_22/v289.go
new file mode 100644
index 0000000000..e2dfc48715
--- /dev/null
+++ b/models/migrations/v1_22/v289.go
@@ -0,0 +1,18 @@
+// Copyright 2024 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package v1_22 //nolint
+
+import "xorm.io/xorm"
+
+func AddDefaultWikiBranch(x *xorm.Engine) error {
+	type Repository struct {
+		ID                int64
+		DefaultWikiBranch string
+	}
+	if err := x.Sync(&Repository{}); err != nil {
+		return err
+	}
+	_, err := x.Exec("UPDATE `repository` SET default_wiki_branch = 'master' WHERE (default_wiki_branch IS NULL) OR (default_wiki_branch = '')")
+	return err
+}