#!/bin/bash
#
# 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.

# If no flags are given, prints the current chrome shell flags.
#
# Otherwise, the given flags are used to REPLACE (not modify) the chrome shell
# flags. For example:
#   adb_chrome_shell_command_line --enable-webgl
#
# To remove all chrome shell flags, pass an empty string for the flags:
#   adb_chrome_shell_command_line ""

CMD_LINE_FILE=/data/local/tmp/chrome-shell-command-line

if [ $# -eq 0 ] ; then
  # If nothing specified, print the command line (stripping off "chrome_shell")
  tempfile=$(tempfile)
  adb pull $CMD_LINE_FILE $tempfile 2>/dev/null
  if [ $? -eq 0 ] ; then
    rm $tempfile
    adb shell cat $CMD_LINE_FILE | cut -d " " -f "2-" 2>/dev/null
  fi
elif [ $# -eq 1 ] && [ "$1" = '' ] ; then
  # If given an empty string, delete the command line.
  set -x
  adb shell rm $CMD_LINE_FILE >/dev/null
else
  # Else set it.
  set -x
  adb shell "echo 'chrome_shell $*' > $CMD_LINE_FILE"
  # Prevent other apps from modifying flags -- this can create security issues.
  adb shell chmod 0664 $CMD_LINE_FILE
fi