From 7439c4107de55e208817b9312cbc4156931d1458 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Fl=C3=BCgge?=
 <952313+seflue@users.noreply.github.com>
Date: Sat, 2 May 2026 22:33:18 +0200
Subject: [PATCH] fix(git): handle detached HEAD silently

Allow reviewing a merge request from detached HEAD.
---
 lua/gitlab/git.lua | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/lua/gitlab/git.lua b/lua/gitlab/git.lua
index ae139df5..7710617e 100644
--- a/lua/gitlab/git.lua
+++ b/lua/gitlab/git.lua
@@ -104,14 +104,18 @@ M.get_ahead_behind = function(current_branch, remote_branch)
   return tonumber(ahead), tonumber(behind)
 end
 
----Return the name of the current branch or nil if it can't be retrieved
+---Return the name of the current branch, or nil (detached HEAD or git failure).
 ---@return string|nil
 M.get_current_branch = function()
   local current_branch, err = run_system({ "git", "branch", "--show-current" })
-  if err or current_branch == "" then
+  if err then
     require("gitlab.utils").notify("Could not get current branch: " .. err, vim.log.levels.ERROR)
     return nil
   end
+  if current_branch == "" then
+    -- detached HEAD: `git branch --show-current` returns empty + exit 0
+    return nil
+  end
   return current_branch
 end