[PATCH] Allow '.git' to be a file for worktrees

[Rob Herring <robh@kernel.org>]

With multiple git worktrees, '.git' can be a file pointing to the real
'.git' directory, so the current check for a directory is too strict.

Signed-off-by: Rob Herring <robh@kernel.org>
---
Turns out I had 2 issues and didn't notice you fixed the first one when 
I rebased. With the first one fixed, it's the same issue with worktrees 
I recently fixed in the kernel.

 b4/__init__.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/b4/__init__.py b/b4/__init__.py
index 53eaf2757e2a..2bb789e2eaf9 100644
--- a/b4/__init__.py
+++ b/b4/__init__.py
@@ -1834,7 +1834,7 @@ def git_run_command(gitdir: Optional[str], args: List[str], stdin: Optional[byte
                     logstderr: bool = False) -> Tuple[int, str]:
     cmdargs = ['git', '--no-pager']
     if gitdir:
-        if os.path.isdir(os.path.join(gitdir, '.git')):
+        if os.path.exists(os.path.join(gitdir, '.git')):
             gitdir = os.path.join(gitdir, '.git')
         cmdargs += ['--git-dir', gitdir]
     cmdargs += args
-- 
2.27.0