Add git cl bash completition.

git_cl_completion.sh

+# Copyright (c) 2016 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 adds completion to bash shells for git cl commands. It is
+# meant for developers and not needed for inclusion by any automated
+# processes that will, of course, specify the full command, not rely
+# on or benefit from tab-completion.
+#
+# Requires:
+#   Installed git bash completion.
+#
+# Usage:
+#   Put something like the following in your .bashrc:
+#   . $PATH_TO_DEPOT_TOOLS/git cl_completion.sh
+#
+
+
+# Parses commands from git cl -h.
+__git_cl_commands () {
+  git cl -h 2> /dev/null | sed -n 's/^\s*\x1b\[32m\(.*\)\x1b\[39m.*$/\1/p'

[M-A Ruel, 2016/08/22 19:18:02]

lol at ascii parsing

that's sooo brittle

+}
+
+# Caches variables in __git_cl_all_commands.
+__git_cl_compute_all_commands () {
+  test -n "$__git_cl_all_commands" ||
+  __git_cl_all_commands="$(__git_cl_commands)"
+}
+
+_git_cl () {
+  __git_cl_compute_all_commands
+  __gitcomp_nl "$(__git_cl_commands)"
+}