From 4167a4d5685e434c9643e3c038e6e77a7407645a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E1=B4=8A=E1=B4=8F=E1=B4=87=20=E1=B4=84=CA=9C=E1=B4=87?=
 =?UTF-8?q?=C9=B4?= <jc@unknwon.io>
Date: Tue, 20 Jan 2026 23:38:10 -0500
Subject: [PATCH] wiki: auto-detect default branch (#8094)

---
 internal/db/wiki.go         | 18 ++++++++++++++----
 internal/route/repo/wiki.go | 17 +++++++++++------
 2 files changed, 25 insertions(+), 10 deletions(-)

diff --git a/internal/db/wiki.go b/internal/db/wiki.go
index eae55d095..d7f6155d5 100644
--- a/internal/db/wiki.go
+++ b/internal/db/wiki.go
@@ -24,6 +24,15 @@ import (
 
 var wikiWorkingPool = sync.NewExclusivePool()
 
+// WikiBranch returns the branch name used by the wiki repository. It checks if
+// "main" branch exists, otherwise falls back to "master".
+func WikiBranch(repoPath string) string {
+	if git.RepoHasBranch(repoPath, "main") {
+		return "main"
+	}
+	return "master"
+}
+
 // ToWikiPageURL formats a string to corresponding wiki URL name.
 func ToWikiPageURL(name string) string {
 	return url.QueryEscape(name)
@@ -79,11 +88,12 @@ func (repo *Repository) LocalWikiPath() string {
 
 // UpdateLocalWiki makes sure the local copy of repository wiki is up-to-date.
 func (repo *Repository) UpdateLocalWiki() error {
-	return UpdateLocalCopyBranch(repo.WikiPath(), repo.LocalWikiPath(), "master", true)
+	wikiPath := repo.WikiPath()
+	return UpdateLocalCopyBranch(wikiPath, repo.LocalWikiPath(), WikiBranch(wikiPath), true)
 }
 
 func discardLocalWikiChanges(localPath string) error {
-	return discardLocalRepoBranchChanges(localPath, "master")
+	return discardLocalRepoBranchChanges(localPath, WikiBranch(localPath))
 }
 
 // updateWikiPage adds new page to repository wiki.
@@ -143,7 +153,7 @@ func (repo *Repository) updateWikiPage(doer *User, oldTitle, title, content, mes
 	)
 	if err != nil {
 		return fmt.Errorf("commit changes: %v", err)
-	} else if err = git.Push(localPath, "origin", "master"); err != nil {
+	} else if err = git.Push(localPath, "origin", WikiBranch(localPath)); err != nil {
 		return fmt.Errorf("push: %v", err)
 	}
 
@@ -190,7 +200,7 @@ func (repo *Repository) DeleteWikiPage(doer *User, title string) (err error) {
 	)
 	if err != nil {
 		return fmt.Errorf("commit changes: %v", err)
-	} else if err = git.Push(localPath, "origin", "master"); err != nil {
+	} else if err = git.Push(localPath, "origin", WikiBranch(localPath)); err != nil {
 		return fmt.Errorf("push: %v", err)
 	}
 
diff --git a/internal/route/repo/wiki.go b/internal/route/repo/wiki.go
index 4ddb92d6c..a5d4cecb5 100644
--- a/internal/route/repo/wiki.go
+++ b/internal/route/repo/wiki.go
@@ -43,12 +43,13 @@ type PageMeta struct {
 }
 
 func renderWikiPage(c *context.Context, isViewPage bool) (*git.Repository, string) {
-	wikiRepo, err := git.Open(c.Repo.Repository.WikiPath())
+	wikiPath := c.Repo.Repository.WikiPath()
+	wikiRepo, err := git.Open(wikiPath)
 	if err != nil {
 		c.Error(err, "open repository")
 		return nil, ""
 	}
-	commit, err := wikiRepo.BranchCommit("master")
+	commit, err := wikiRepo.BranchCommit(database.WikiBranch(wikiPath))
 	if err != nil {
 		c.Error(err, "get branch commit")
 		return nil, ""
@@ -124,7 +125,8 @@ func Wiki(c *context.Context) {
 	}
 
 	// Get last change information.
-	commits, err := wikiRepo.Log(git.RefsHeads+"master", git.LogOptions{Path: pageName + ".md"})
+	branch := database.WikiBranch(c.Repo.Repository.WikiPath())
+	commits, err := wikiRepo.Log(git.RefsHeads+branch, git.LogOptions{Path: pageName + ".md"})
 	if err != nil {
 		c.Error(err, "get commits by path")
 		return
@@ -143,12 +145,15 @@ func WikiPages(c *context.Context) {
 		return
 	}
 
-	wikiRepo, err := git.Open(c.Repo.Repository.WikiPath())
+	wikiPath := c.Repo.Repository.WikiPath()
+	wikiRepo, err := git.Open(wikiPath)
 	if err != nil {
 		c.Error(err, "open repository")
 		return
 	}
-	commit, err := wikiRepo.BranchCommit("master")
+
+	branch := database.WikiBranch(wikiPath)
+	commit, err := wikiRepo.BranchCommit(branch)
 	if err != nil {
 		c.Error(err, "get branch commit")
 		return
@@ -162,7 +167,7 @@ func WikiPages(c *context.Context) {
 	pages := make([]PageMeta, 0, len(entries))
 	for i := range entries {
 		if entries[i].Type() == git.ObjectBlob && strings.HasSuffix(entries[i].Name(), ".md") {
-			commits, err := wikiRepo.Log(git.RefsHeads+"master", git.LogOptions{Path: entries[i].Name()})
+			commits, err := wikiRepo.Log(git.RefsHeads+branch, git.LogOptions{Path: entries[i].Name()})
 			if err != nil {
 				c.Error(err, "get commits by path")
 				return