#!/usr/bin/env python
#
# Copyright 2017 Google Inc.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.


"""Create the asset."""


import argparse
import common
import grp
import os
import pwd
import shutil
import subprocess
import sys
import tempfile
import urllib2
import utils


VALGRIND = 'valgrind-3.13.0'
TARBALL = '%s.tar.bz2' % VALGRIND
DOWNLOAD_URL = 'ftp://sourceware.org/pub/valgrind/%s' % TARBALL
TEMP_DIR = os.path.join(tempfile.gettempdir(), 'skia-%s' % VALGRIND)
INSTALL_DIR = os.path.join(TEMP_DIR, 'valgrind_install')


def download_tarball():
  with utils.chdir(TEMP_DIR):
    if os.path.isfile(TARBALL):
      return
    with open(TARBALL, 'wb') as f:
      f.write(urllib2.urlopen(DOWNLOAD_URL).read())


def unzip_tarball():
  with utils.chdir(TEMP_DIR):
    if os.path.isdir(VALGRIND):
      return
    subprocess.check_call(['tar', 'xvjf', TARBALL])


def create_install_dir():
  if os.path.isdir(INSTALL_DIR):
    return
  os.makedirs(INSTALL_DIR)


def build_valgrind():
  if os.path.isfile(os.path.join(INSTALL_DIR, 'bin', 'valgrind')):
    return
  with utils.chdir(os.path.join(TEMP_DIR, VALGRIND)):
    subprocess.check_call(['./configure', '--prefix=%s' % INSTALL_DIR])
    subprocess.check_call(['make'])
    subprocess.check_call(['make', 'install'])


def copy_files(target_dir):
  with utils.chdir(os.path.join(TEMP_DIR, VALGRIND)):
    os.mkdir(os.path.join(target_dir, 'bin'))
    shutil.copy(os.path.join(INSTALL_DIR, 'bin', 'valgrind'),
                os.path.join(target_dir, 'bin', 'valgrind'))
    os.mkdir(os.path.join(target_dir, 'lib'))
    os.mkdir(os.path.join(target_dir, 'lib', 'valgrind'))
    for lib in ['memcheck-amd64-linux']:
      shutil.copy(os.path.join(INSTALL_DIR, 'lib', 'valgrind', lib),
                  os.path.join(target_dir, 'lib', 'valgrind', lib))
    for lib in ['core', 'memcheck']:
      libname = 'vgpreload_%s-amd64-linux.so' % lib
      shutil.copy(os.path.join(INSTALL_DIR, 'lib', 'valgrind', libname),
                  os.path.join(target_dir, 'lib', 'valgrind', libname))

    shutil.copy('default.supp',
                os.path.join(target_dir, 'lib', 'valgrind', 'default.supp'))


def create_asset(target_dir):
  """Create the asset."""
  if os.name == 'nt':
    print 'This script does not run on Windows.'
    sys.exit(1)

  create_install_dir()
  if not os.path.isdir(TEMP_DIR):
    os.makedirs(TEMP_DIR)
  download_tarball()
  unzip_tarball()
  build_valgrind()
  copy_files(target_dir)


def main():
  parser = argparse.ArgumentParser()
  parser.add_argument('--target_dir', '-t', required=True)
  args = parser.parse_args()
  create_asset(args.target_dir)


if __name__ == '__main__':
  main()