tools/gradle.py

#!/usr/bin/env python
# Copyright (c) 2016, the R8 project authors. Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.

# Wrapper script for running gradle.
# Will make sure we pulled down gradle before running, and will use the pulled
# down version to have a consistent developer experience.

import os
import subprocess
import sys
import utils

GRADLE_DIR = os.path.join(utils.REPO_ROOT, 'third_party', 'gradle')
GRADLE_SHA1 = os.path.join(GRADLE_DIR, 'gradle.tar.gz.sha1')
GRADLE_TGZ = os.path.join(GRADLE_DIR, 'gradle.tar.gz')
if utils.IsWindows():
  GRADLE = os.path.join(GRADLE_DIR, 'gradle', 'bin', 'gradle.bat')
else:
  GRADLE = os.path.join(GRADLE_DIR, 'gradle', 'bin', 'gradle')

def PrintCmd(s):
  if type(s) is list:
    s = ' '.join(s)
  print 'Running: %s' % s
  # I know this will hit os on windows eventually if we don't do this.
  sys.stdout.flush()

def EnsureGradle():
  if not os.path.exists(GRADLE) or os.path.getmtime(GRADLE_TGZ) < os.path.getmtime(GRADLE_SHA1):
    # Bootstrap or update gradle, everything else is controlled using gradle.
    utils.DownloadFromGoogleCloudStorage(GRADLE_SHA1)
    # Update the mtime of the tar file to make sure we do not run again unless
    # there is an update.
    os.utime(GRADLE_TGZ, None)
  else:
    print 'gradle.py: Gradle binary present'

def RunGradle(args, throw_on_failure=True):
  EnsureGradle()
  cmd = [GRADLE]
  cmd.extend(args)
  utils.PrintCmd(cmd)
  with utils.ChangedWorkingDirectory(utils.REPO_ROOT):
    return_value = subprocess.call(cmd)
    if throw_on_failure and return_value != 0:
      raise
    return return_value

def Main():
  RunGradle(sys.argv[1:])

if __name__ == '__main__':
  sys.exit(Main())