#!/usr/bin/env python
# Copyright (c) 2012 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.

"""Entry point for both build and try bots.

This script is invoked from XXX, usually without arguments
to package an SDK. It automatically determines whether
this SDK is for mac, win, linux.

The script inspects the following environment variables:

BUILDBOT_BUILDERNAME to determine whether the script is run locally
and whether it should upload an SDK to file storage (GSTORE)
"""

# pylint: disable=W0621

# std python includes
import datetime
import glob
import optparse
import os
import re
import sys

if sys.version_info < (2, 6, 0):
  sys.stderr.write("python 2.6 or later is required run this script\n")
  sys.exit(1)

# local includes
import buildbot_common
import build_projects
import build_updater
import build_version
import generate_notice
import manifest_util
import parse_dsc
import verify_filelist

from build_paths import SCRIPT_DIR, SDK_SRC_DIR, SRC_DIR, NACL_DIR, OUT_DIR
from build_paths import NACLPORTS_DIR, GSTORE, GONACL_APPENGINE_SRC_DIR

# Add SDK make tools scripts to the python path.
sys.path.append(os.path.join(SDK_SRC_DIR, 'tools'))
sys.path.append(os.path.join(NACL_DIR, 'build'))

import getos
import oshelpers

BUILD_DIR = os.path.join(NACL_DIR, 'build')
NACL_TOOLCHAIN_DIR = os.path.join(NACL_DIR, 'toolchain')
NACL_TOOLCHAINTARS_DIR = os.path.join(NACL_TOOLCHAIN_DIR, '.tars')

CYGTAR = os.path.join(BUILD_DIR, 'cygtar.py')
PKGVER = os.path.join(BUILD_DIR, 'package_version', 'package_version.py')

NACLPORTS_URL = 'https://chromium.googlesource.com/external/naclports.git'
NACLPORTS_REV = 'e53078c33d99b0b3cbadbbbbb92cccf7a48d5dc1'

GYPBUILD_DIR = 'gypbuild'

options = None

# Map of: ToolchainName: (PackageName, SDKDir).
TOOLCHAIN_PACKAGE_MAP = {
    'newlib': ('nacl_x86_newlib', '%(platform)s_x86_newlib'),
    'bionic': ('nacl_arm_bionic', '%(platform)s_arm_bionic'),
    'arm': ('nacl_arm_newlib', '%(platform)s_arm_newlib'),
    'glibc': ('nacl_x86_glibc', '%(platform)s_x86_glibc'),
    'pnacl': ('pnacl_newlib', '%(platform)s_pnacl')
    }


def GetToolchainNaClInclude(tcname, tcpath, arch):
  if arch == 'x86':
    if tcname == 'pnacl':
      return os.path.join(tcpath, 'le32-nacl', 'include')
    return os.path.join(tcpath, 'x86_64-nacl', 'include')
  elif arch == 'arm':
    return os.path.join(tcpath, 'arm-nacl', 'include')
  else:
    buildbot_common.ErrorExit('Unknown architecture: %s' % arch)


def GetGypGenDir(xarch):
  if xarch == 'arm':
    build_dir = GYPBUILD_DIR + '-arm'
  else:
    build_dir = GYPBUILD_DIR
  return os.path.join(OUT_DIR, build_dir, 'Release', 'gen')


def GetGypBuiltLib(tcname, xarch=None):
  if tcname == 'pnacl':
    tcname = 'pnacl_newlib'
  if not xarch:
    xarch = ''
  return os.path.join(GetGypGenDir(xarch), 'tc_' + tcname, 'lib' + xarch)


def GetToolchainNaClLib(tcname, tcpath, xarch):
  if tcname == 'pnacl':
    return os.path.join(tcpath, 'le32-nacl', 'lib')
  elif xarch == '32':
    return os.path.join(tcpath, 'x86_64-nacl', 'lib32')
  elif xarch == '64':
    return os.path.join(tcpath, 'x86_64-nacl', 'lib')
  elif xarch == 'arm':
    return os.path.join(tcpath, 'arm-nacl', 'lib')


def GetToolchainDirName(tcname, xarch):
  if tcname == 'pnacl':
    return '%s_%s' % (getos.GetPlatform(), tcname)
  elif xarch == 'arm':
    return '%s_arm_%s' % (getos.GetPlatform(), tcname)
  else:
    return '%s_x86_%s' % (getos.GetPlatform(), tcname)


def GetGypToolchainLib(tcname, xarch):
  if xarch == 'arm':
    toolchain = xarch
  else:
    toolchain = tcname

  tcpath = os.path.join(GetGypGenDir(xarch), 'sdk',
                        '%s_x86' % getos.GetPlatform(),
                        TOOLCHAIN_PACKAGE_MAP[toolchain][0])
  return GetToolchainNaClLib(tcname, tcpath, xarch)


def GetOutputToolchainLib(pepperdir, tcname, xarch):
  tcpath = os.path.join(pepperdir, 'toolchain',
                        GetToolchainDirName(tcname, xarch))
  return GetToolchainNaClLib(tcname, tcpath, xarch)


def GetPNaClTranslatorLib(tcpath, arch):
  if arch not in ['arm', 'x86-32', 'x86-64']:
    buildbot_common.ErrorExit('Unknown architecture %s.' % arch)
  return os.path.join(tcpath, 'translator', arch, 'lib')


def BuildStepDownloadToolchains(toolchains):
  buildbot_common.BuildStep('Running package_version.py')
  args = [sys.executable, PKGVER, '--exclude', 'arm_trusted']
  if 'bionic' in toolchains:
    build_platform = '%s_x86' % getos.GetPlatform()
    args.extend(['--append', os.path.join(build_platform, 'nacl_arm_bionic')])
  args.append('sync')
  buildbot_common.Run(args, cwd=NACL_DIR)


def BuildStepCleanPepperDirs(pepperdir, pepperdir_old):
  buildbot_common.BuildStep('Clean Pepper Dirs')
  buildbot_common.RemoveDir(pepperdir_old)
  buildbot_common.RemoveDir(pepperdir)
  buildbot_common.MakeDir(pepperdir)


def BuildStepMakePepperDirs(pepperdir, subdirs):
  for subdir in subdirs:
    buildbot_common.MakeDir(os.path.join(pepperdir, subdir))

TEXT_FILES = [
  'AUTHORS',
  'COPYING',
  'LICENSE',
  'README.Makefiles',
  'getting_started/README',
]

def BuildStepCopyTextFiles(pepperdir, pepper_ver, chrome_revision,
                           nacl_revision):
  buildbot_common.BuildStep('Add Text Files')
  InstallFiles(SDK_SRC_DIR, pepperdir, TEXT_FILES)

  # Replace a few placeholders in README
  readme_text = open(os.path.join(SDK_SRC_DIR, 'README')).read()
  readme_text = readme_text.replace('${VERSION}', pepper_ver)
  readme_text = readme_text.replace('${CHROME_REVISION}', chrome_revision)
  readme_text = readme_text.replace('${CHROME_COMMIT_POSITION}',
                                    build_version.ChromeCommitPosition())
  readme_text = readme_text.replace('${NACL_REVISION}', nacl_revision)

  # Year/Month/Day Hour:Minute:Second
  time_format = '%Y/%m/%d %H:%M:%S'
  readme_text = readme_text.replace('${DATE}',
      datetime.datetime.now().strftime(time_format))

  open(os.path.join(pepperdir, 'README'), 'w').write(readme_text)


def BuildStepUntarToolchains(pepperdir, toolchains):
  buildbot_common.BuildStep('Untar Toolchains')
  platform = getos.GetPlatform()
  build_platform = '%s_x86' % platform
  tmpdir = os.path.join(OUT_DIR, 'tc_temp')
  buildbot_common.RemoveDir(tmpdir)
  buildbot_common.MakeDir(tmpdir)

  # Create a list of extract packages tuples, the first part should be
  # "$PACKAGE_TARGET/$PACKAGE". The second part should be the destination
  # directory relative to pepperdir/toolchain.
  extract_packages = []
  for toolchain in toolchains:
    toolchain_map = TOOLCHAIN_PACKAGE_MAP.get(toolchain, None)
    if toolchain_map:
      package_name, tcname = toolchain_map
      package_tuple = (os.path.join(build_platform, package_name),
                       tcname % {'platform': platform})
      extract_packages.append(package_tuple)

  if extract_packages:
    # Extract all of the packages into the temp directory.
    package_names = [package_tuple[0] for package_tuple in extract_packages]
    buildbot_common.Run([sys.executable, PKGVER,
                           '--packages', ','.join(package_names),
                           '--tar-dir', NACL_TOOLCHAINTARS_DIR,
                           '--dest-dir', tmpdir,
                           'extract'])

    # Move all the packages we extracted to the correct destination.
    for package_name, dest_dir in extract_packages:
      full_src_dir = os.path.join(tmpdir, package_name)
      full_dst_dir = os.path.join(pepperdir, 'toolchain', dest_dir)
      buildbot_common.Move(full_src_dir, full_dst_dir)

  # Cleanup the temporary directory we are no longer using.
  buildbot_common.RemoveDir(tmpdir)


# List of toolchain headers to install.
# Source is relative to top of Chromium tree, destination is relative
# to the toolchain header directory.
NACL_HEADER_MAP = {
  'newlib': [
      ('native_client/src/include/nacl/nacl_exception.h', 'nacl/'),
      ('native_client/src/include/nacl/nacl_minidump.h', 'nacl/'),
      ('native_client/src/untrusted/irt/irt.h', ''),
      ('native_client/src/untrusted/irt/irt_dev.h', ''),
      ('native_client/src/untrusted/irt/irt_extension.h', ''),
      ('native_client/src/untrusted/nacl/nacl_dyncode.h', 'nacl/'),
      ('native_client/src/untrusted/nacl/nacl_startup.h', 'nacl/'),
      ('native_client/src/untrusted/pthread/pthread.h', ''),
      ('native_client/src/untrusted/pthread/semaphore.h', ''),
      ('native_client/src/untrusted/valgrind/dynamic_annotations.h', 'nacl/'),
      ('ppapi/nacl_irt/public/irt_ppapi.h', ''),
  ],
  'glibc': [
      ('native_client/src/include/nacl/nacl_exception.h', 'nacl/'),
      ('native_client/src/include/nacl/nacl_minidump.h', 'nacl/'),
      ('native_client/src/untrusted/irt/irt.h', ''),
      ('native_client/src/untrusted/irt/irt_dev.h', ''),
      ('native_client/src/untrusted/nacl/nacl_dyncode.h', 'nacl/'),
      ('native_client/src/untrusted/nacl/nacl_startup.h', 'nacl/'),
      ('native_client/src/untrusted/valgrind/dynamic_annotations.h', 'nacl/'),
      ('ppapi/nacl_irt/public/irt_ppapi.h', ''),
  ],
  'bionic': [
      ('ppapi/nacl_irt/public/irt_ppapi.h', ''),
  ],
  'host': []
}

def InstallFiles(src_root, dest_root, file_list):
  """Copy a set of files from src_root to dest_root according
  to the given mapping.  This allows files to be copied from
  to a location in the destination tree that is different to the
  location in the source tree.

  If the destination mapping ends with a '/' then the destination
  basename is inherited from the the source file.

  Wildcards can be used in the source list but it is not recommended
  as this can end up adding things to the SDK unintentionally.
  """
  for file_spec in file_list:
    # The list of files to install can be a simple list of
    # strings or a list of pairs, where each pair corresponds
    # to a mapping from source to destination names.
    if type(file_spec) == str:
      src_file = dest_file = file_spec
    else:
      src_file, dest_file = file_spec

    src_file = os.path.join(src_root, src_file)

    # Expand sources files using glob.
    sources = glob.glob(src_file)
    if not sources:
      sources = [src_file]

    if len(sources) > 1 and not dest_file.endswith('/'):
      buildbot_common.ErrorExit("Target file must end in '/' when "
                                "using globbing to install multiple files")

    for source in sources:
      if dest_file.endswith('/'):
        dest = os.path.join(dest_file, os.path.basename(source))
      else:
        dest = dest_file
      dest = os.path.join(dest_root, dest)
      if not os.path.isdir(os.path.dirname(dest)):
        buildbot_common.MakeDir(os.path.dirname(dest))
      buildbot_common.CopyFile(source, dest)


def InstallNaClHeaders(tc_dst_inc, tc_name):
  """Copies NaCl headers to expected locations in the toolchain."""
  if tc_name == 'arm':
    # arm toolchain header should be the same as the x86 newlib
    # ones
    tc_name = 'newlib'

  InstallFiles(SRC_DIR, tc_dst_inc, NACL_HEADER_MAP[tc_name])


def MakeNinjaRelPath(path):
  return os.path.join(os.path.relpath(OUT_DIR, SRC_DIR), path)


TOOLCHAIN_LIBS = {
  'bionic' : [
    'libminidump_generator.a',
    'libnacl_dyncode.a',
    'libnacl_exception.a',
    'libnacl_list_mappings.a',
    'libppapi.a',
  ],
  'newlib' : [
    'crti.o',
    'crtn.o',
    'libminidump_generator.a',
    'libnacl.a',
    'libnacl_dyncode.a',
    'libnacl_exception.a',
    'libnacl_list_mappings.a',
    'libnosys.a',
    'libppapi.a',
    'libppapi_stub.a',
    'libpthread.a',
  ],
  'glibc': [
    'libminidump_generator.a',
    'libminidump_generator.so',
    'libnacl.a',
    'libnacl_dyncode.a',
    'libnacl_dyncode.so',
    'libnacl_exception.a',
    'libnacl_exception.so',
    'libnacl_list_mappings.a',
    'libnacl_list_mappings.so',
    'libppapi.a',
    'libppapi.so',
    'libppapi_stub.a',
  ],
  'pnacl': [
    'libminidump_generator.a',
    'libnacl.a',
    'libnacl_dyncode.a',
    'libnacl_exception.a',
    'libnacl_list_mappings.a',
    'libnosys.a',
    'libppapi.a',
    'libppapi_stub.a',
    'libpthread.a',
  ]
}


def GypNinjaInstall(pepperdir, toolchains):
  build_dir = GYPBUILD_DIR
  ninja_out_dir = os.path.join(OUT_DIR, build_dir, 'Release')
  tools_files = [
    ['sel_ldr', 'sel_ldr_x86_32'],
    ['ncval_new', 'ncval'],
    ['irt_core_newlib_x32.nexe', 'irt_core_x86_32.nexe'],
    ['irt_core_newlib_x64.nexe', 'irt_core_x86_64.nexe'],
  ]

  platform = getos.GetPlatform()

  # TODO(binji): dump_syms doesn't currently build on Windows. See
  # http://crbug.com/245456
  if platform != 'win':
    tools_files += [
      ['dump_syms', 'dump_syms'],
      ['minidump_dump', 'minidump_dump'],
      ['minidump_stackwalk', 'minidump_stackwalk']
    ]

  tools_files.append(['sel_ldr64', 'sel_ldr_x86_64'])

  if platform == 'linux':
    tools_files.append(['nacl_helper_bootstrap',
                        'nacl_helper_bootstrap_x86_32'])
    tools_files.append(['nacl_helper_bootstrap64',
                        'nacl_helper_bootstrap_x86_64'])
    tools_files.append(['nonsfi_loader_newlib_x32_nonsfi.nexe',
                        'nonsfi_loader_x86_32'])

  buildbot_common.MakeDir(os.path.join(pepperdir, 'tools'))

  # Add .exe extensions to all windows tools
  for pair in tools_files:
    if platform == 'win' and not pair[0].endswith('.nexe'):
      pair[0] += '.exe'
      pair[1] += '.exe'

  InstallFiles(ninja_out_dir, os.path.join(pepperdir, 'tools'), tools_files)

  # Add ARM binaries
  if platform == 'linux' and not options.no_arm_trusted:
    tools_files = [
      ['irt_core_newlib_arm.nexe', 'irt_core_arm.nexe'],
      ['irt_core_newlib_arm.nexe', 'irt_core_arm.nexe'],
      ['sel_ldr', 'sel_ldr_arm'],
      ['nacl_helper_bootstrap', 'nacl_helper_bootstrap_arm']
    ]
    ninja_out_dir = os.path.join(OUT_DIR, build_dir + '-arm', 'Release')
    InstallFiles(ninja_out_dir, os.path.join(pepperdir, 'tools'), tools_files)

  for tc in set(toolchains) & set(['newlib', 'glibc', 'pnacl']):
    if tc == 'pnacl':
      xarches = (None,)
    else:
      xarches = ('arm', '32', '64')

    for xarch in xarches:
      if tc == 'glibc' and xarch == 'arm':
        continue

      src_dir = GetGypBuiltLib(tc, xarch)
      dst_dir = GetOutputToolchainLib(pepperdir, tc, xarch)
      InstallFiles(src_dir, dst_dir, TOOLCHAIN_LIBS[tc])

      # Copy ARM newlib components to bionic
      if tc == 'newlib' and xarch == 'arm' and 'bionic' in toolchains:
        bionic_dir = GetOutputToolchainLib(pepperdir, 'bionic', xarch)
        InstallFiles(src_dir, bionic_dir, TOOLCHAIN_LIBS['bionic'])

      if tc != 'pnacl':
        src_dir = GetGypToolchainLib(tc, xarch)
        InstallFiles(src_dir, dst_dir, ['crt1.o'])


def GypNinjaBuild_NaCl(rel_out_dir):
  gyp_py = os.path.join(NACL_DIR, 'build', 'gyp_nacl')
  nacl_core_sdk_gyp = os.path.join(NACL_DIR, 'build', 'nacl_core_sdk.gyp')
  all_gyp = os.path.join(NACL_DIR, 'build', 'all.gyp')

  out_dir = MakeNinjaRelPath(rel_out_dir)
  out_dir_arm = MakeNinjaRelPath(rel_out_dir + '-arm')
  GypNinjaBuild('ia32', gyp_py, nacl_core_sdk_gyp, 'nacl_core_sdk', out_dir)
  GypNinjaBuild('arm', gyp_py, nacl_core_sdk_gyp, 'nacl_core_sdk', out_dir_arm)
  GypNinjaBuild('ia32', gyp_py, all_gyp, 'ncval_new', out_dir)

  platform = getos.GetPlatform()
  if platform == 'win':
    NinjaBuild('sel_ldr64', out_dir)
  else:
    out_dir_64 = MakeNinjaRelPath(rel_out_dir + '-64')
    GypNinjaBuild('x64', gyp_py, nacl_core_sdk_gyp, 'sel_ldr', out_dir_64)

    # We only need sel_ldr from the 64-bit out directory.
    # sel_ldr needs to be renamed, so we'll call it sel_ldr64.
    files_to_copy = [('sel_ldr', 'sel_ldr64')]
    if platform == 'linux':
      files_to_copy.append(('nacl_helper_bootstrap', 'nacl_helper_bootstrap64'))

    for src, dst in files_to_copy:
      buildbot_common.CopyFile(
          os.path.join(SRC_DIR, out_dir_64, 'Release', src),
          os.path.join(SRC_DIR, out_dir, 'Release', dst))


def GypNinjaBuild_Breakpad(rel_out_dir):
  # TODO(binji): dump_syms doesn't currently build on Windows. See
  # http://crbug.com/245456
  if getos.GetPlatform() == 'win':
    return

  gyp_py = os.path.join(SRC_DIR, 'build', 'gyp_chromium')
  out_dir = MakeNinjaRelPath(rel_out_dir)
  gyp_file = os.path.join(SRC_DIR, 'breakpad', 'breakpad.gyp')
  build_list = ['dump_syms', 'minidump_dump', 'minidump_stackwalk']
  GypNinjaBuild('ia32', gyp_py, gyp_file, build_list, out_dir)


def GypNinjaBuild_PPAPI(arch, rel_out_dir):
  gyp_py = os.path.join(SRC_DIR, 'build', 'gyp_chromium')
  out_dir = MakeNinjaRelPath(rel_out_dir)
  gyp_file = os.path.join(SRC_DIR, 'ppapi', 'native_client',
                          'native_client.gyp')
  GypNinjaBuild(arch, gyp_py, gyp_file, 'ppapi_lib', out_dir)


def GypNinjaBuild_Pnacl(rel_out_dir, target_arch):
  # TODO(binji): This will build the pnacl_irt_shim twice; once as part of the
  # Chromium build, and once here. When we move more of the SDK build process
  # to gyp, we can remove this.
  gyp_py = os.path.join(SRC_DIR, 'build', 'gyp_chromium')

  out_dir = MakeNinjaRelPath(rel_out_dir)
  gyp_file = os.path.join(SRC_DIR, 'ppapi', 'native_client', 'src',
                          'untrusted', 'pnacl_irt_shim', 'pnacl_irt_shim.gyp')
  targets = ['aot']
  GypNinjaBuild(target_arch, gyp_py, gyp_file, targets, out_dir, False)


def GypNinjaBuild(arch, gyp_py_script, gyp_file, targets,
                  out_dir, force_arm_gcc=True):
  gyp_env = dict(os.environ)
  gyp_env['GYP_GENERATORS'] = 'ninja'
  gyp_defines = []
  if options.mac_sdk:
    gyp_defines.append('mac_sdk=%s' % options.mac_sdk)
  if arch:
    gyp_defines.append('target_arch=%s' % arch)
    if arch == 'arm':
      if getos.GetPlatform() == 'linux':
        gyp_env['CC'] = 'arm-linux-gnueabihf-gcc'
        gyp_env['CXX'] = 'arm-linux-gnueabihf-g++'
        gyp_env['AR'] = 'arm-linux-gnueabihf-ar'
        gyp_env['AS'] = 'arm-linux-gnueabihf-as'
        gyp_env['CC_host'] = 'cc'
        gyp_env['CXX_host'] = 'c++'
      gyp_defines += ['armv7=1', 'arm_thumb=0', 'arm_neon=1',
          'arm_float_abi=hard']
      if force_arm_gcc:
        gyp_defines.append('nacl_enable_arm_gcc=1')
      if options.no_arm_trusted:
        gyp_defines.append('disable_cross_trusted=1')
  if getos.GetPlatform() == 'mac':
    gyp_defines.append('clang=1')

  gyp_env['GYP_DEFINES'] = ' '.join(gyp_defines)
  for key in ['GYP_GENERATORS', 'GYP_DEFINES', 'CC']:
    value = gyp_env.get(key)
    if value is not None:
      print '%s="%s"' % (key, value)
  gyp_generator_flags = ['-G', 'output_dir=%s' % (out_dir,)]
  gyp_depth = '--depth=.'
  buildbot_common.Run(
      [sys.executable, gyp_py_script, gyp_file, gyp_depth] + \
          gyp_generator_flags,
      cwd=SRC_DIR,
      env=gyp_env)
  NinjaBuild(targets, out_dir)


def NinjaBuild(targets, out_dir):
  if type(targets) is not list:
    targets = [targets]
  out_config_dir = os.path.join(out_dir, 'Release')
  buildbot_common.Run(['ninja', '-C', out_config_dir] + targets, cwd=SRC_DIR)


def BuildStepBuildToolchains(pepperdir, toolchains):
  buildbot_common.BuildStep('SDK Items')

  GypNinjaBuild_NaCl(GYPBUILD_DIR)
  GypNinjaBuild_Breakpad(GYPBUILD_DIR)

  platform = getos.GetPlatform()
  newlibdir = os.path.join(pepperdir, 'toolchain', platform + '_x86_newlib')
  glibcdir = os.path.join(pepperdir, 'toolchain', platform + '_x86_glibc')
  armdir = os.path.join(pepperdir, 'toolchain', platform + '_arm_newlib')
  pnacldir = os.path.join(pepperdir, 'toolchain', platform + '_pnacl')
  bionicdir = os.path.join(pepperdir, 'toolchain', platform + '_arm_bionic')

  if set(toolchains) & set(['glibc', 'newlib']):
    GypNinjaBuild_PPAPI('ia32', GYPBUILD_DIR)
    GypNinjaBuild_PPAPI('x64', GYPBUILD_DIR)

  if 'arm' in toolchains:
    GypNinjaBuild_PPAPI('arm', GYPBUILD_DIR + '-arm')

  GypNinjaInstall(pepperdir, toolchains)

  if 'newlib' in toolchains:
    InstallNaClHeaders(GetToolchainNaClInclude('newlib', newlibdir, 'x86'),
                       'newlib')

  if 'glibc' in toolchains:
    InstallNaClHeaders(GetToolchainNaClInclude('glibc', glibcdir, 'x86'),
                       'glibc')

  if 'arm' in toolchains:
    InstallNaClHeaders(GetToolchainNaClInclude('newlib', armdir, 'arm'),
                       'arm')

  if 'bionic' in toolchains:
    InstallNaClHeaders(GetToolchainNaClInclude('bionic', bionicdir, 'arm'),
                       'bionic')

  if 'pnacl' in toolchains:
    # NOTE: For ia32, gyp builds both x86-32 and x86-64 by default.
    for arch in ('ia32', 'arm'):
      # Fill in the latest native pnacl shim library from the chrome build.
      build_dir = GYPBUILD_DIR + '-pnacl-' + arch
      GypNinjaBuild_Pnacl(build_dir, arch)
      if arch == 'ia32':
        nacl_arches = ['x86-32', 'x86-64']
      elif arch == 'arm':
        nacl_arches = ['arm']
      else:
        buildbot_common.ErrorExit('Unknown architecture: %s' % arch)
      for nacl_arch in nacl_arches:
        release_build_dir = os.path.join(OUT_DIR, build_dir, 'Release',
                                         'gen', 'tc_pnacl_translate',
                                         'lib-' + nacl_arch)

        pnacl_translator_lib_dir = GetPNaClTranslatorLib(pnacldir, nacl_arch)
        if not os.path.isdir(pnacl_translator_lib_dir):
          buildbot_common.ErrorExit('Expected %s directory to exist.' %
                                    pnacl_translator_lib_dir)

        buildbot_common.CopyFile(
            os.path.join(release_build_dir, 'libpnacl_irt_shim.a'),
            pnacl_translator_lib_dir)

    InstallNaClHeaders(GetToolchainNaClInclude('pnacl', pnacldir, 'x86'),
                       'newlib')


def MakeDirectoryOrClobber(pepperdir, dirname, clobber):
  dirpath = os.path.join(pepperdir, dirname)
  if clobber:
    buildbot_common.RemoveDir(dirpath)
  buildbot_common.MakeDir(dirpath)

  return dirpath


def BuildStepUpdateHelpers(pepperdir, clobber):
  buildbot_common.BuildStep('Update project helpers')
  build_projects.UpdateHelpers(pepperdir, clobber=clobber)


def BuildStepUpdateUserProjects(pepperdir, toolchains,
                                build_experimental, clobber):
  buildbot_common.BuildStep('Update examples and libraries')

  filters = {}
  if not build_experimental:
    filters['EXPERIMENTAL'] = False
  if toolchains:
    toolchains = toolchains[:]

    # arm isn't a valid toolchain for build_projects
    if 'arm' in toolchains:
      toolchains.remove('arm')

    if 'host' in toolchains:
      toolchains.remove('host')
      toolchains.append(getos.GetPlatform())

    filters['TOOLS'] = toolchains

  # Update examples and libraries
  filters['DEST'] = [
    'getting_started',
    'examples/api',
    'examples/benchmarks',
    'examples/demo',
    'examples/tutorial',
    'src'
  ]

  tree = parse_dsc.LoadProjectTree(SDK_SRC_DIR, include=filters)
  build_projects.UpdateProjects(pepperdir, tree, clobber=clobber,
                                toolchains=toolchains)


def BuildStepMakeAll(pepperdir, directory, step_name,
                     deps=True, clean=False, config='Debug', args=None):
  buildbot_common.BuildStep(step_name)
  build_projects.BuildProjectsBranch(pepperdir, directory, clean,
                                     deps, config, args)


def BuildStepBuildLibraries(pepperdir, directory):
  BuildStepMakeAll(pepperdir, directory, 'Build Libraries Debug',
      clean=True, config='Debug')
  BuildStepMakeAll(pepperdir, directory, 'Build Libraries Release',
      clean=True, config='Release')

  # Cleanup .pyc file generated while building libraries.  Without
  # this we would end up shipping the pyc in the SDK tarball.
  buildbot_common.RemoveFile(os.path.join(pepperdir, 'tools', '*.pyc'))


def GenerateNotice(fileroot, output_filename='NOTICE', extra_files=None):
  # Look for LICENSE files
  license_filenames_re = re.compile('LICENSE|COPYING|COPYRIGHT')

  license_files = []
  for root, _, files in os.walk(fileroot):
    for filename in files:
      if license_filenames_re.match(filename):
        path = os.path.join(root, filename)
        license_files.append(path)

  if extra_files:
    license_files += [os.path.join(fileroot, f) for f in extra_files]
  print '\n'.join(license_files)

  if not os.path.isabs(output_filename):
    output_filename = os.path.join(fileroot, output_filename)
  generate_notice.Generate(output_filename, fileroot, license_files)


def BuildStepVerifyFilelist(pepperdir):
  buildbot_common.BuildStep('Verify SDK Files')
  file_list_path = os.path.join(SCRIPT_DIR, 'sdk_files.list')
  try:
    verify_filelist.Verify(file_list_path, pepperdir)
    print 'OK'
  except verify_filelist.ParseException, e:
    buildbot_common.ErrorExit('Parsing sdk_files.list failed:\n\n%s' % e)
  except verify_filelist.VerifyException, e:
    file_list_rel = os.path.relpath(file_list_path)
    verify_filelist_py = os.path.splitext(verify_filelist.__file__)[0] + '.py'
    verify_filelist_py = os.path.relpath(verify_filelist_py)
    pepperdir_rel = os.path.relpath(pepperdir)

    msg = """\
SDK verification failed:

%s
Add/remove files from %s to fix.

Run:
    ./%s %s %s
to test.""" % (e, file_list_rel, verify_filelist_py, file_list_rel,
               pepperdir_rel)
    buildbot_common.ErrorExit(msg)


def BuildStepTarBundle(pepper_ver, tarfile):
  buildbot_common.BuildStep('Tar Pepper Bundle')
  buildbot_common.MakeDir(os.path.dirname(tarfile))
  buildbot_common.Run([sys.executable, CYGTAR, '-C', OUT_DIR, '-cjf', tarfile,
       'pepper_' + pepper_ver], cwd=NACL_DIR)


def GetManifestBundle(pepper_ver, chrome_revision, nacl_revision, tarfile,
                      archive_url):
  with open(tarfile, 'rb') as tarfile_stream:
    archive_sha1, archive_size = manifest_util.DownloadAndComputeHash(
        tarfile_stream)

  archive = manifest_util.Archive(manifest_util.GetHostOS())
  archive.url = archive_url
  archive.size = archive_size
  archive.checksum = archive_sha1

  bundle = manifest_util.Bundle('pepper_' + pepper_ver)
  bundle.revision = int(chrome_revision)
  bundle.repath = 'pepper_' + pepper_ver
  bundle.version = int(pepper_ver)
  bundle.description = (
      'Chrome %s bundle. Chrome revision: %s. NaCl revision: %s' % (
            pepper_ver, chrome_revision, nacl_revision))
  bundle.stability = 'dev'
  bundle.recommended = 'no'
  bundle.archives = [archive]
  return bundle


def BuildStepArchiveBundle(name, pepper_ver, chrome_revision, nacl_revision,
                           tarfile):
  buildbot_common.BuildStep('Archive %s' % name)
  bucket_path = 'nativeclient-mirror/nacl/nacl_sdk/%s' % (
      build_version.ChromeVersion(),)
  tarname = os.path.basename(tarfile)
  tarfile_dir = os.path.dirname(tarfile)
  buildbot_common.Archive(tarname, bucket_path, tarfile_dir)

  # generate "manifest snippet" for this archive.
  archive_url = GSTORE + 'nacl_sdk/%s/%s' % (
      build_version.ChromeVersion(), tarname)
  bundle = GetManifestBundle(pepper_ver, chrome_revision, nacl_revision,
                             tarfile, archive_url)

  manifest_snippet_file = os.path.join(OUT_DIR, tarname + '.json')
  with open(manifest_snippet_file, 'wb') as manifest_snippet_stream:
    manifest_snippet_stream.write(bundle.GetDataAsString())

  buildbot_common.Archive(tarname + '.json', bucket_path, OUT_DIR,
                          step_link=False)


def BuildStepArchiveSDKTools():
  # Only push up sdk_tools.tgz and nacl_sdk.zip on the linux buildbot.
  builder_name = os.getenv('BUILDBOT_BUILDERNAME', '')
  if builder_name == 'linux-sdk-multi':
    buildbot_common.BuildStep('Build SDK Tools')
    build_updater.BuildUpdater(OUT_DIR)

    buildbot_common.BuildStep('Archive SDK Tools')
    bucket_path = 'nativeclient-mirror/nacl/nacl_sdk/%s' % (
        build_version.ChromeVersion(),)
    buildbot_common.Archive('sdk_tools.tgz', bucket_path, OUT_DIR,
                            step_link=False)
    buildbot_common.Archive('nacl_sdk.zip', bucket_path, OUT_DIR,
                            step_link=False)


def BuildStepSyncNaClPorts():
  """Pull the pinned revision of naclports from SVN."""
  buildbot_common.BuildStep('Sync naclports')

  # In case a previous svn checkout exists, remove it.
  # TODO(sbc): remove this once all the build machines
  # have removed the old checkout
  if (os.path.exists(NACLPORTS_DIR) and
      not os.path.exists(os.path.join(NACLPORTS_DIR, '.git'))):
    buildbot_common.RemoveDir(NACLPORTS_DIR)

  if not os.path.exists(NACLPORTS_DIR):
    # checkout new copy of naclports
    cmd = ['git', 'clone', NACLPORTS_URL, 'naclports']
    buildbot_common.Run(cmd, cwd=os.path.dirname(NACLPORTS_DIR))
  else:
    # checkout new copy of naclports
    buildbot_common.Run(['git', 'fetch'], cwd=NACLPORTS_DIR)

  # sync to required revision
  cmd = ['git', 'checkout', str(NACLPORTS_REV)]
  buildbot_common.Run(cmd, cwd=NACLPORTS_DIR)


def BuildStepBuildNaClPorts(pepper_ver, pepperdir):
  """Build selected naclports in all configurations."""
  # TODO(sbc): currently naclports doesn't know anything about
  # Debug builds so the Debug subfolders are all empty.

  env = dict(os.environ)
  env['NACL_SDK_ROOT'] = pepperdir
  env['PEPPER_DIR'] = os.path.basename(pepperdir)  # pepper_NN
  env['NACLPORTS_NO_ANNOTATE'] = "1"
  env['NACLPORTS_NO_UPLOAD'] = "1"
  env['BUILDBOT_GOT_REVISION'] = str(NACLPORTS_REV)

  build_script = 'build_tools/buildbot_sdk_bundle.sh'
  buildbot_common.BuildStep('Build naclports')

  bundle_dir = os.path.join(NACLPORTS_DIR, 'out', 'sdk_bundle')
  out_dir = os.path.join(bundle_dir, 'pepper_%s' % pepper_ver)

  # Remove the sdk_bundle directory to remove stale files from previous builds.
  buildbot_common.RemoveDir(bundle_dir)

  buildbot_common.Run([build_script], env=env, cwd=NACLPORTS_DIR)

  # Some naclports do not include a standalone LICENSE/COPYING file
  # so we explicitly list those here for inclusion.
  extra_licenses = ('tinyxml/readme.txt',
                    'jpeg-8d/README',
                    'zlib-1.2.3/README')
  src_root = os.path.join(NACLPORTS_DIR, 'out', 'build')
  output_license = os.path.join(out_dir, 'ports', 'LICENSE')
  GenerateNotice(src_root , output_license, extra_licenses)
  readme = os.path.join(out_dir, 'ports', 'README')
  oshelpers.Copy(['-v', os.path.join(SDK_SRC_DIR, 'README.naclports'), readme])


def BuildStepTarNaClPorts(pepper_ver, tarfile):
  """Create tar archive containing headers and libs from naclports build."""
  buildbot_common.BuildStep('Tar naclports Bundle')
  buildbot_common.MakeDir(os.path.dirname(tarfile))
  pepper_dir = 'pepper_%s' % pepper_ver
  archive_dirs = [os.path.join(pepper_dir, 'ports')]

  ports_out = os.path.join(NACLPORTS_DIR, 'out', 'sdk_bundle')
  cmd = [sys.executable, CYGTAR, '-C', ports_out, '-cjf', tarfile]
  cmd += archive_dirs
  buildbot_common.Run(cmd, cwd=NACL_DIR)


def BuildStepBuildAppEngine(pepperdir, chrome_revision):
  """Build the projects found in src/gonacl_appengine/src"""
  buildbot_common.BuildStep('Build GoNaCl AppEngine Projects')
  cmd = ['make', 'upload', 'REVISION=%s' % chrome_revision]
  env = dict(os.environ)
  env['NACL_SDK_ROOT'] = pepperdir
  env['NACLPORTS_NO_ANNOTATE'] = "1"
  buildbot_common.Run(cmd, env=env, cwd=GONACL_APPENGINE_SRC_DIR)


def main(args):
  parser = optparse.OptionParser(description=__doc__)
  parser.add_option('--nacl-tree-path',
      help='Path to native client tree for bionic build.',
      dest='nacl_tree_path')
  parser.add_option('--qemu', help='Add qemu for ARM.',
      action='store_true')
  parser.add_option('--bionic', help='Add bionic build.',
      action='store_true')
  parser.add_option('--tar', help='Force the tar step.',
      action='store_true')
  parser.add_option('--archive', help='Force the archive step.',
      action='store_true')
  parser.add_option('--release', help='PPAPI release version.',
      dest='release', default=None)
  parser.add_option('--build-ports',
      help='Build naclport bundle.', action='store_true')
  parser.add_option('--build-app-engine',
      help='Build AppEngine demos.', action='store_true')
  parser.add_option('--experimental',
      help='build experimental examples and libraries', action='store_true',
      dest='build_experimental')
  parser.add_option('--skip-toolchain', help='Skip toolchain untar',
      action='store_true')
  parser.add_option('--mac-sdk',
      help='Set the mac-sdk (e.g. 10.6) to use when building with ninja.')
  parser.add_option('--no-arm-trusted', action='store_true',
      help='Disable building of ARM trusted components (sel_ldr, etc).')

  # To setup bash completion for this command first install optcomplete
  # and then add this line to your .bashrc:
  #  complete -F _optcomplete build_sdk.py
  try:
    import optcomplete
    optcomplete.autocomplete(parser)
  except ImportError:
    pass

  global options
  options, args = parser.parse_args(args[1:])
  if args:
    parser.error("Unexpected arguments: %s" % str(args))

  if options.nacl_tree_path:
    options.bionic = True
    toolchain_build = os.path.join(options.nacl_tree_path, 'toolchain_build')
    print 'WARNING: Building bionic toolchain from NaCl checkout.'
    print 'This option builds bionic from the sources currently in the'
    print 'provided NativeClient checkout, and the results instead of '
    print 'downloading a toolchain from the builder. This may result in a'
    print 'NaCl SDK that can not run on ToT chrome.'
    print 'NOTE:  To clobber you will need to run toolchain_build_bionic.py'
    print 'directly from the NativeClient checkout.'
    print ''
    response = raw_input("Type 'y' and hit enter to continue.\n")
    if response != 'y' and response != 'Y':
      print 'Aborting.'
      return 1

    # Get head version of NativeClient tree
    buildbot_common.BuildStep('Build bionic toolchain.')
    buildbot_common.Run([sys.executable, 'toolchain_build_bionic.py', '-f'],
                        cwd=toolchain_build)
  else:
    toolchain_build = None

  if buildbot_common.IsSDKBuilder():
    options.archive = True
    options.build_ports = True
    # TODO(binji): re-enable app_engine build when the linux builder stops
    # breaking when trying to git clone from github.
    # See http://crbug.com/412969.
    options.build_app_engine = False
    options.tar = True

  # NOTE: order matters here. This will be the order that is specified in the
  # Makefiles; the first toolchain will be the default.
  toolchains = ['pnacl', 'newlib', 'glibc', 'arm', 'host']

  # Changes for experimental bionic builder
  if options.bionic:
    toolchains.append('bionic')
    options.build_ports = False
    options.build_app_engine = False

  print 'Building: ' + ' '.join(toolchains)

  if options.archive and not options.tar:
    parser.error('Incompatible arguments with archive.')

  chrome_version = int(build_version.ChromeMajorVersion())
  chrome_revision = build_version.ChromeRevision()
  nacl_revision = build_version.NaClRevision()
  pepper_ver = str(chrome_version)
  pepper_old = str(chrome_version - 1)
  pepperdir = os.path.join(OUT_DIR, 'pepper_' + pepper_ver)
  pepperdir_old = os.path.join(OUT_DIR, 'pepper_' + pepper_old)
  if options.bionic:
    tarname = 'naclsdk_bionic.tar.bz2'
  else:
    tarname = 'naclsdk_' + getos.GetPlatform() + '.tar.bz2'
  tarfile = os.path.join(OUT_DIR, tarname)

  if options.release:
    pepper_ver = options.release
  print 'Building PEPPER %s at %s' % (pepper_ver, chrome_revision)

  if 'NACL_SDK_ROOT' in os.environ:
    # We don't want the currently configured NACL_SDK_ROOT to have any effect
    # of the build.
    del os.environ['NACL_SDK_ROOT']

  if not options.skip_toolchain:
    BuildStepCleanPepperDirs(pepperdir, pepperdir_old)
    BuildStepMakePepperDirs(pepperdir, ['include', 'toolchain', 'tools'])
    BuildStepDownloadToolchains(toolchains)
    if options.nacl_tree_path:
      # Instead of untarring, copy the raw bionic toolchain
      not_bionic = [i for i in toolchains if i != 'bionic']
      BuildStepUntarToolchains(pepperdir, not_bionic)
      tcname = GetToolchainDirName('bionic', 'arm')
      srcdir = os.path.join(toolchain_build, 'out', tcname)
      bionicdir = os.path.join(pepperdir, 'toolchain', tcname)
      oshelpers.Copy(['-r', srcdir, bionicdir])
    else:
      BuildStepUntarToolchains(pepperdir, toolchains)

    BuildStepBuildToolchains(pepperdir, toolchains)

  BuildStepUpdateHelpers(pepperdir, True)
  BuildStepUpdateUserProjects(pepperdir, toolchains,
                              options.build_experimental, True)

  BuildStepCopyTextFiles(pepperdir, pepper_ver, chrome_revision, nacl_revision)

  # Ship with libraries prebuilt, so run that first.
  BuildStepBuildLibraries(pepperdir, 'src')
  GenerateNotice(pepperdir)

  # Verify the SDK contains what we expect.
  if not options.bionic:
    BuildStepVerifyFilelist(pepperdir)

  if options.tar:
    BuildStepTarBundle(pepper_ver, tarfile)

  if options.build_ports and getos.GetPlatform() == 'linux':
    ports_tarfile = os.path.join(OUT_DIR, 'naclports.tar.bz2')
    BuildStepSyncNaClPorts()
    BuildStepBuildNaClPorts(pepper_ver, pepperdir)
    if options.tar:
      BuildStepTarNaClPorts(pepper_ver, ports_tarfile)

  if options.build_app_engine and getos.GetPlatform() == 'linux':
    BuildStepBuildAppEngine(pepperdir, chrome_revision)

  if options.qemu:
    qemudir = os.path.join(NACL_DIR, 'toolchain', 'linux_arm-trusted')
    oshelpers.Copy(['-r', qemudir, pepperdir])

  # Archive on non-trybots.
  if options.archive:
    BuildStepArchiveBundle('build', pepper_ver, chrome_revision, nacl_revision,
                           tarfile)
    if options.build_ports and getos.GetPlatform() == 'linux':
      BuildStepArchiveBundle('naclports', pepper_ver, chrome_revision,
                             nacl_revision, ports_tarfile)
    BuildStepArchiveSDKTools()

  return 0


if __name__ == '__main__':
  try:
    sys.exit(main(sys.argv))
  except KeyboardInterrupt:
    buildbot_common.ErrorExit('build_sdk: interrupted')