Make git-cl wrapper print errors instead of silently deleting repos....

git-cl

Index: git-cl
===================================================================
--- git-cl	(revision 39096)
+++ git-cl	(working copy)
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (c) 2009 The Chromium Authors. All rights reserved.
+# Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
@@ -8,7 +8,19 @@
 cur_url=$(git config -f "$base_dir/git-cl-repo/.git/config" remote.origin.url)
 
 if [ "$cur_url" != "$url" ]; then
+  cat <<EOF
+$base_dir/git-cl-repo
+is tracking a non-default remote repository:
+
+  default: $url
+  yours:   $cur_url
+
+This is intended to be an automatically-updating, read-only repository.
+Please create a separate repository for making changes to git-cl, move your
+modifications there, and then run:
   rm -rf $base_dir/git-cl-repo
+EOF
+  exit 1
 fi
 
 if [ ! -f "$base_dir/git-cl-repo/git-cl" ]; then