From 3d5c53eff1a41503134d08b87ffdb5784be54eb3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Ri=C3=9Fe?= <m.risse@fz-juelich.de>
Date: Mon, 6 Nov 2023 16:32:53 +0100
Subject: [PATCH] git-annex: show info message for hidden branch

---
 modules/annex/annex.go          | 6 ++++++
 routers/web/repo/branch.go      | 5 +++++
 templates/repo/branch/list.tmpl | 2 +-
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/modules/annex/annex.go b/modules/annex/annex.go
index bb049d77ed686..af7fb7182dc97 100644
--- a/modules/annex/annex.go
+++ b/modules/annex/annex.go
@@ -152,3 +152,9 @@ func IsAnnexed(blob *git.Blob) (bool, error) {
 	}
 	return true, nil
 }
+
+// IsAnnexRepo determines if repo is a git-annex enabled repository
+func IsAnnexRepo(repo *git.Repository) bool {
+	_, _, err := git.NewCommand(repo.Ctx, "annex", "info").RunStdString(&git.RunOpts{Dir: repo.Path})
+	return err == nil
+}
diff --git a/routers/web/repo/branch.go b/routers/web/repo/branch.go
index bc72d5f2eca17..ac37d0480aee0 100644
--- a/routers/web/repo/branch.go
+++ b/routers/web/repo/branch.go
@@ -15,6 +15,7 @@ import (
 	git_model "code.gitea.io/gitea/models/git"
 	repo_model "code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/unit"
+	"code.gitea.io/gitea/modules/annex"
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/git"
@@ -45,6 +46,10 @@ func Branches(ctx *context.Context) {
 	ctx.Data["PageIsViewCode"] = true
 	ctx.Data["PageIsBranches"] = true
 
+	if annex.IsAnnexRepo(ctx.Repo.GitRepo) {
+		ctx.Flash.Info("This repository is a git-annex repository, the git-annex branch is hidden to avoid accidental changes to or from it.", true)
+	}
+
 	page := ctx.FormInt("page")
 	if page <= 1 {
 		page = 1
diff --git a/templates/repo/branch/list.tmpl b/templates/repo/branch/list.tmpl
index cec5b6fc3e62d..8314a58ad5c8c 100644
--- a/templates/repo/branch/list.tmpl
+++ b/templates/repo/branch/list.tmpl
@@ -1,5 +1,5 @@
 {{template "base/head" .}}
-<div role="main" aria-label="{{.Title}}" class="page-content ui repository branches">
+<div role="main" aria-label="{{.Title}}" class="page-content repository branches">
 	{{template "repo/header" .}}
 	<div class="ui container">
 		{{template "base/alert" .}}