Generalize python_git_runner for use in non-git scripts.

python_git_runner.sh

Index: python_git_runner.sh
diff --git a/python_git_runner.sh b/python_git_runner.sh
deleted file mode 100755
index 2dbda0aad50b4b165f7a70f19d53cab1896d1e5e..0000000000000000000000000000000000000000
--- a/python_git_runner.sh
+++ /dev/null
@@ -1,36 +0,0 @@
-# Copyright 2014 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.
-
-## This file is designed to be sourced from a bash script whose name takes the
-## form 'git-sub-command'. This script will then instead invoke
-## '[depot_tools]/git_sub_command.py' correctly under mingw as well
-## as posix-ey systems, passing along all other command line flags.
-
-## Example:
-## echo ". python_git_runner.sh" > git-foo-command
-## ./git-foo-command  #=> runs `python git_foo_command.py`
-
-## Constants
-PYTHONDONTWRITEBYTECODE=1
-
-## "Input parameters".
-# If set before the script is sourced, then we'll use the pre-set values.
-#
-# SCRIPT defaults to the basename of $0, with dashes replaced with underscores
-
-if [[ $OSTYPE = msys ]]
-then
-  DEPOT_TOOLS="${0%\\*}"
-  BASENAME="${0##*\\}"
-else
-  DEPOT_TOOLS="${0%/*}"
-  BASENAME="${0##*/}"
-fi
-SCRIPT="${SCRIPT-${BASENAME//-/_}.py}"
-
-if [[ -e "$DEPOT_TOOLS/python.bat" && $OSTYPE = msys ]]; then
-  cmd.exe //c "$DEPOT_TOOLS\\python.bat" "$DEPOT_TOOLS\\$SCRIPT" "$@"
-else
-  exec "$DEPOT_TOOLS/$SCRIPT" "$@"
-fi