From 60997ea745965c9dfc9edb459d53d9c841304a54 Mon Sep 17 00:00:00 2001
From: Yiwei Zhang <yiwzhang@google.com>
Date: Wed, 15 May 2024 21:25:38 +0000
Subject: [PATCH] fail gracefully if git nav-downstream is called in cog

Bug: 339231299
Change-Id: If4d5dcc0ee0606acd8b539d19b29106f5152bba3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5540889
Commit-Queue: Josip Sokcevic <sokcevic@chromium.org>
Auto-Submit: Yiwei Zhang <yiwzhang@google.com>
Reviewed-by: Josip Sokcevic <sokcevic@chromium.org>
---
 git_nav_downstream.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/git_nav_downstream.py b/git_nav_downstream.py
index 7834d8a77..17dc31644 100755
--- a/git_nav_downstream.py
+++ b/git_nav_downstream.py
@@ -11,13 +11,18 @@ which branch.
 import argparse
 import sys
 
-import gclient_utils
 from git_common import current_branch, branches, upstream, run, hash_one
+
+import gclient_utils
 import metrics
 
 
 @metrics.collector.collect_metrics('git nav-downstream')
 def main(args):
+    if gclient_utils.IsEnvCog():
+        print('nav-downstream command is not supported in non-git environment.',
+              file=sys.stderr)
+        return 1
     parser = argparse.ArgumentParser()
     parser.add_argument('--pick',
                         help=('The number to pick if this command would '