#!/usr/bin/env python3
# Copyright 2015 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""This script will check out llvm and clang, and then package the results up
to a number of tarballs."""

import argparse
import fnmatch
import itertools
import lzma
import multiprocessing.dummy
import os
import platform
import shutil
import subprocess
import sys
import tarfile
import time

# Path constants.
THIS_DIR = os.path.dirname(__file__)
CHROMIUM_DIR = os.path.abspath(os.path.join(THIS_DIR, '..', '..', '..'))
THIRD_PARTY_DIR = os.path.join(THIS_DIR, '..', '..', '..', 'third_party')
BUILDTOOLS_DIR = os.path.join(THIS_DIR, '..', '..', '..', 'buildtools')
LLVM_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm')
LLVM_BOOTSTRAP_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm-bootstrap')
LLVM_BOOTSTRAP_INSTALL_DIR = os.path.join(THIRD_PARTY_DIR,
                                          'llvm-bootstrap-install')
LLVM_BUILD_DIR = os.path.join(THIRD_PARTY_DIR, 'llvm-build')
LLVM_RELEASE_DIR = os.path.join(LLVM_BUILD_DIR, 'Release+Asserts')
EU_STRIP = os.path.join(BUILDTOOLS_DIR, 'third_party', 'eu-strip', 'bin',
                        'eu-strip')

DEFAULT_GCS_BUCKET = 'chromium-browser-clang-staging'


def Tee(output, logfile):
  logfile.write(output)
  print(output, end=' ')


def TeeCmd(cmd, logfile, fail_hard=True):
  """Runs cmd and writes the output to both stdout and logfile."""
  # Reading from PIPE can deadlock if one buffer is full but we wait on a
  # different one.  To work around this, pipe the subprocess's stderr to
  # its stdout buffer and don't give it a stdin.
  # shell=True is required in cmd.exe since depot_tools has an svn.bat, and
  # bat files only work with shell=True set.
  proc = subprocess.Popen(cmd, bufsize=1, shell=sys.platform == 'win32',
                          stdin=open(os.devnull), stdout=subprocess.PIPE,
                          stderr=subprocess.STDOUT)
  for line in iter(proc.stdout.readline,''):
    Tee(str(line.decode()), logfile)
    if proc.poll() is not None:
      break
  exit_code = proc.wait()
  if exit_code != 0 and fail_hard:
    print('Failed:', cmd)
    sys.exit(1)


def PrintTarProgress(tarinfo):
  print('Adding', tarinfo.name)
  return tarinfo


def GetGsutilPath():
  if not 'find_depot_tools' in sys.modules:
    sys.path.insert(0, os.path.join(CHROMIUM_DIR, 'build'))
    global find_depot_tools
    import find_depot_tools
  depot_path = find_depot_tools.add_depot_tools_to_path()
  if depot_path is None:
    print ('depot_tools are not found in PATH. '
           'Follow the instructions in this document '
           'http://dev.chromium.org/developers/how-tos/install-depot-tools'
           ' to install depot_tools and then try again.')
    sys.exit(1)
  gsutil_path = os.path.join(depot_path, 'gsutil.py')
  return gsutil_path


def RunGsutil(args):
  return subprocess.call([sys.executable, GetGsutilPath()] + args)


def PackageInArchive(directory_path, archive_path):
  bin_dir_path = os.path.join(directory_path, 'bin')
  if sys.platform != 'win32' and os.path.exists(bin_dir_path):
    for f in os.listdir(bin_dir_path):
      file_path = os.path.join(bin_dir_path, f)
      if not os.path.islink(file_path):
        if sys.platform == 'darwin':
          subprocess.call(['strip', '-x', file_path])
        else:
          subprocess.call(['strip', file_path])

  with tarfile.open(archive_path + '.tar.xz',
                    'w:xz',
                    preset=9 | lzma.PRESET_EXTREME) as tar_xz:
    for f in sorted(os.listdir(directory_path)):
      tar_xz.add(os.path.join(directory_path, f),
                 arcname=f,
                 filter=PrintTarProgress)


def MaybeUpload(do_upload,
                gcs_bucket,
                filename,
                gcs_platform,
                extra_gsutil_args=[]):
  gsutil_args = ['cp'] + extra_gsutil_args + [
      '-n', filename,
      'gs://%s/%s/' % (gcs_bucket, gcs_platform)
  ]
  if do_upload:
    print('Uploading %s to Google Cloud Storage...' % filename)
    exit_code = RunGsutil(gsutil_args)
    if exit_code != 0:
      print("gsutil failed, exit_code: %s" % exit_code)
      sys.exit(exit_code)
  else:
    print('To upload, run:')
    print('gsutil %s' % ' '.join(gsutil_args))


def UploadPDBsToSymbolServer(binaries):
  assert sys.platform == 'win32'
  # Upload PDB and binary to the symbol server on Windows.  Put them into the
  # chromium-browser-symsrv bucket, since chrome devs have that in their
  # _NT_SYMBOL_PATH already. Executable and PDB must be at paths following a
  # certain pattern for the Microsoft debuggers to be able to load them.
  # Executable:
  #  chromium-browser-symsrv/clang-cl.exe/ABCDEFAB01234/clang-cl.ex_
  #    ABCDEFAB is the executable's timestamp in %08X format, 01234 is the
  #    executable's image size in %x format. tools/symsrc/img_fingerprint.py
  #    can compute this ABCDEFAB01234 string for us, so use that.
  #    The .ex_ instead of .exe at the end means that the file is compressed.
  # PDB:
  # gs://chromium-browser-symsrv/clang-cl.exe.pdb/AABBCCDD/clang-cl.exe.pd_
  #   AABBCCDD here is computed from the output of
  #      dumpbin /all mybinary.exe | find "Format: RSDS"
  #   but tools/symsrc/pdb_fingerprint_from_img.py can compute it already, so
  #   again just use that.
  sys.path.insert(0, os.path.join(CHROMIUM_DIR, 'tools', 'symsrc'))
  import img_fingerprint, pdb_fingerprint_from_img

  files = []
  for binary_path in binaries:
    binary_path = os.path.join(LLVM_RELEASE_DIR, binary_path)
    binary_id = img_fingerprint.GetImgFingerprint(binary_path)
    (pdb_id, pdb_path) = pdb_fingerprint_from_img.GetPDBInfoFromImg(binary_path)
    files += [(binary_path, binary_id), (pdb_path, pdb_id)]

    # The build process builds clang.exe and then copies it to clang-cl.exe
    # (both are the same binary and they behave differently on what their
    # filename is).  Hence, the pdb is at clang.pdb, not at clang-cl.pdb.
    # Likewise, lld-link.exe's PDB file is called lld.pdb.

  # Compress and upload.
  def compress(t):
    subprocess.check_call(
      ['makecab', '/D', 'CompressionType=LZX', '/D', 'CompressionMemory=21',
       t[0], '/L', os.path.dirname(t[0])], stdout=open(os.devnull, 'w'))
  multiprocessing.dummy.Pool().map(compress, files)
  for f, f_id in files:
    f_cab = f[:-1] + '_'
    dest = '%s/%s/%s' % (os.path.basename(f), f_id, os.path.basename(f_cab))
    print('Uploading %s to Google Cloud Storage...' % dest)
    gsutil_args = ['cp', '-n', '-a', 'public-read', f_cab,
                   'gs://chromium-browser-symsrv/' + dest]
    exit_code = RunGsutil(gsutil_args)
    if exit_code != 0:
      print("gsutil failed, exit_code: %s" % exit_code)
      sys.exit(exit_code)


def replace_version(want, version):
  """Replaces $V with provided version."""
  return set([w.replace('$V', version) for w in want])


def main():
  parser = argparse.ArgumentParser(description='build and package clang')
  parser.add_argument('--upload', action='store_true',
                      help='Upload the target archive to Google Cloud Storage.')
  parser.add_argument(
      '--bucket',
      default=DEFAULT_GCS_BUCKET,
      help='Google Cloud Storage bucket where the target archive is uploaded')
  parser.add_argument('--revision',
                      help='LLVM revision to use. Default: based on update.py')
  args = parser.parse_args()

  if args.revision:
    # Use upload_revision.py to set the revision first.
    cmd = [
        sys.executable,
        os.path.join(THIS_DIR, 'upload_revision.py'),
        '--no-git',  # Just run locally, don't upload anything.
        '--clang-git-hash=' + args.revision
    ]
    subprocess.run(cmd, check=True)

  # This needs to happen after upload_revision.py modifies update.py.
  from update import PACKAGE_VERSION, RELEASE_VERSION, STAMP_FILE, STAMP_FILENAME

  expected_stamp = PACKAGE_VERSION
  pdir = 'clang-' + expected_stamp
  print(pdir)

  if sys.platform == 'darwin':
    # When we need to run this script on an arm machine, we need to add a
    # --build-mac-intel switch to pick which clang to build, pick the
    # 'Mac_arm64' here when there's no flag and 'Mac' when --build-mac-intel is
    # passed. Also update the build script to explicitly pass a default triple
    # then.
    if platform.machine() == 'arm64':
      gcs_platform = 'Mac_arm64'
    else:
      gcs_platform = 'Mac'
  elif sys.platform == 'win32':
    gcs_platform = 'Win'
  else:
    gcs_platform = 'Linux_x64'

  with open('buildlog.txt', 'w', encoding='utf-8') as log:
    Tee('Starting build\n', log)

    # Do a clobber build.
    shutil.rmtree(LLVM_BOOTSTRAP_DIR, ignore_errors=True)
    shutil.rmtree(LLVM_BOOTSTRAP_INSTALL_DIR, ignore_errors=True)
    shutil.rmtree(LLVM_BUILD_DIR, ignore_errors=True)

    build_cmd = [
        sys.executable,
        os.path.join(THIS_DIR, 'build.py'),
        '--bootstrap',
        '--disable-asserts',
        '--run-tests',
    ]
    # PGO drastically increases packaging time and x86-64 macs are almost
    # obsolete while being slow, so don't PGO-optimize x86-64 mac toolchains.
    if sys.platform != 'darwin' or platform.machine() == 'arm64':
      build_cmd.append('--pgo')
    if sys.platform != 'darwin':
      build_cmd.append('--thinlto')
    if sys.platform.startswith('linux'):
      build_cmd.append('--bolt')

    TeeCmd(build_cmd, log)

  stamp = open(STAMP_FILE).read().rstrip()
  if stamp != expected_stamp:
    print('Actual stamp (%s) != expected stamp (%s).' % (stamp, expected_stamp))
    return 1

  shutil.rmtree(pdir, ignore_errors=True)

  # Track of all files that should be part of runtime package. '$V' is replaced
  # by RELEASE_VERSION, and no glob is supported.
  runtime_packages = None
  runtime_package_name = None

  # Copy a list of files to the directory we're going to tar up.
  # This supports the same patterns that the fnmatch module understands.
  # '$V' is replaced by RELEASE_VERSION further down.
  exe_ext = '.exe' if sys.platform == 'win32' else ''
  want = set([
      STAMP_FILENAME,
      'bin/llvm-pdbutil' + exe_ext,
      'bin/llvm-symbolizer' + exe_ext,
      'bin/llvm-undname' + exe_ext,
      # Copy built-in headers (lib/clang/3.x.y/include).
      'lib/clang/$V/include/*',
      'lib/clang/$V/share/asan_*list.txt',
      'lib/clang/$V/share/cfi_*list.txt',
  ])
  if sys.platform == 'win32':
    want.update([
        'bin/clang-cl.exe',
        'bin/lld-link.exe',
        'bin/llvm-ml.exe',
    ])
  else:
    want.update([
        'bin/clang',

        # Add LLD.
        'bin/lld',

        # Add llvm-ar for LTO.
        'bin/llvm-ar',

        # llvm-ml for Windows cross builds.
        'bin/llvm-ml',

        # Add llvm-readobj (symlinked from llvm-readelf) for extracting SONAMEs.
        'bin/llvm-readobj',
    ])
    if sys.platform != 'darwin':
      # The Fuchsia runtimes are only built on non-Mac platforms.
      want.update([
          'lib/clang/$V/lib/aarch64-unknown-fuchsia/libclang_rt.builtins.a',
          'lib/clang/$V/lib/x86_64-unknown-fuchsia/libclang_rt.builtins.a',
          'lib/clang/$V/lib/x86_64-unknown-fuchsia/libclang_rt.profile.a',
          'lib/clang/$V/lib/x86_64-unknown-fuchsia/libclang_rt.asan.so',
          'lib/clang/$V/lib/x86_64-unknown-fuchsia/libclang_rt.asan-preinit.a',
          'lib/clang/$V/lib/x86_64-unknown-fuchsia/libclang_rt.asan_static.a',
      ])
  if sys.platform == 'darwin':
    runtime_package_name = 'clang-mac-runtime-library'
    runtime_packages = set([
        # AddressSanitizer runtime.
        'lib/clang/$V/lib/darwin/libclang_rt.asan_ios_dynamic.dylib',
        'lib/clang/$V/lib/darwin/libclang_rt.asan_iossim_dynamic.dylib',
        'lib/clang/$V/lib/darwin/libclang_rt.asan_osx_dynamic.dylib',

        # Builtin libraries for the _IsOSVersionAtLeast runtime function.
        'lib/clang/$V/lib/darwin/libclang_rt.ios.a',
        'lib/clang/$V/lib/darwin/libclang_rt.iossim.a',
        'lib/clang/$V/lib/darwin/libclang_rt.osx.a',
        'lib/clang/$V/lib/darwin/libclang_rt.tvos.a',
        'lib/clang/$V/lib/darwin/libclang_rt.tvossim.a',
        'lib/clang/$V/lib/darwin/libclang_rt.watchos.a',
        'lib/clang/$V/lib/darwin/libclang_rt.watchossim.a',
        'lib/clang/$V/lib/darwin/libclang_rt.xros.a',
        'lib/clang/$V/lib/darwin/libclang_rt.xrossim.a',

        # Profile runtime (used by profiler and code coverage).
        'lib/clang/$V/lib/darwin/libclang_rt.profile_iossim.a',
        'lib/clang/$V/lib/darwin/libclang_rt.profile_osx.a',

        # UndefinedBehaviorSanitizer runtime.
        'lib/clang/$V/lib/darwin/libclang_rt.ubsan_iossim_dynamic.dylib',
        'lib/clang/$V/lib/darwin/libclang_rt.ubsan_osx_dynamic.dylib',
    ])
    want.update(runtime_packages)
    want.update([
        # Add llvm-objcopy for its use as install_name_tool.
        'bin/llvm-objcopy',
    ])
  elif sys.platform.startswith('linux'):
    want.update([
        # pylint: disable=line-too-long

        # Add llvm-objcopy for partition extraction on Android.
        'bin/llvm-objcopy',

        # Add llvm-nm.
        'bin/llvm-nm',

        # AddressSanitizer C runtime (pure C won't link with *_cxx).
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.asan.a',
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.asan.a.syms',
        'lib/clang/$V/lib/i386-unknown-linux-gnu/libclang_rt.asan.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.asan.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.asan.a.syms',
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.asan_static.a',
        'lib/clang/$V/lib/i386-unknown-linux-gnu/libclang_rt.asan_static.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.asan_static.a',

        # AddressSanitizer C++ runtime.
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.asan_cxx.a',
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.asan_cxx.a.syms',
        'lib/clang/$V/lib/i386-unknown-linux-gnu/libclang_rt.asan_cxx.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.asan_cxx.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.asan_cxx.a.syms',

        # AddressSanitizer Android runtime.
        'lib/clang/$V/lib/linux/libclang_rt.asan-aarch64-android.so',
        'lib/clang/$V/lib/linux/libclang_rt.asan-arm-android.so',
        'lib/clang/$V/lib/linux/libclang_rt.asan-i686-android.so',
        'lib/clang/$V/lib/linux/libclang_rt.asan-riscv64-android.so',
        'lib/clang/$V/lib/linux/libclang_rt.asan_static-aarch64-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.asan_static-arm-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.asan_static-i686-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.asan_static-riscv64-android.a',

        # Builtins for Android.
        'lib/clang/$V/lib/linux/libclang_rt.builtins-aarch64-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.builtins-arm-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.builtins-i686-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.builtins-x86_64-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.builtins-riscv64-android.a',

        # Builtins for Linux.
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.builtins.a',
        'lib/clang/$V/lib/armv7-unknown-linux-gnueabihf/libclang_rt.builtins.a',
        'lib/clang/$V/lib/i386-unknown-linux-gnu/libclang_rt.builtins.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.builtins.a',

        # crtstart/crtend for Linux.
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/clang_rt.crtbegin.o',
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/clang_rt.crtend.o',
        'lib/clang/$V/lib/armv7-unknown-linux-gnueabihf/clang_rt.crtbegin.o',
        'lib/clang/$V/lib/armv7-unknown-linux-gnueabihf/clang_rt.crtend.o',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/clang_rt.crtbegin.o',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/clang_rt.crtend.o',

        # HWASAN Android runtime.
        'lib/clang/$V/lib/linux/libclang_rt.hwasan-aarch64-android.so',
        'lib/clang/$V/lib/linux/libclang_rt.hwasan-preinit-aarch64-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.hwasan-riscv64-android.so',
        'lib/clang/$V/lib/linux/libclang_rt.hwasan-preinit-riscv64-android.a',

        # MemorySanitizer C runtime (pure C won't link with *_cxx).
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.msan.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.msan.a.syms',

        # MemorySanitizer C++ runtime.
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.msan_cxx.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.msan_cxx.a.syms',

        # Profile runtime (used by profiler and code coverage).
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.profile.a',
        'lib/clang/$V/lib/armv7-unknown-linux-gnueabihf/libclang_rt.profile.a',
        'lib/clang/$V/lib/i386-unknown-linux-gnu/libclang_rt.profile.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.profile.a',
        'lib/clang/$V/lib/linux/libclang_rt.profile-i686-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.profile-x86_64-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.profile-aarch64-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.profile-arm-android.a',
        'lib/clang/$V/lib/linux/libclang_rt.profile-riscv64-android.a',

        # ThreadSanitizer C runtime (pure C won't link with *_cxx).
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.tsan.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.tsan.a.syms',

        # ThreadSanitizer C++ runtime.
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.tsan_cxx.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.tsan_cxx.a.syms',

        # UndefinedBehaviorSanitizer C runtime (pure C won't link with *_cxx).
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.ubsan_standalone.a',
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.ubsan_standalone.a.syms',
        'lib/clang/$V/lib/i386-unknown-linux-gnu/libclang_rt.ubsan_standalone.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.ubsan_standalone.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.ubsan_standalone.a.syms',

        # UndefinedBehaviorSanitizer C++ runtime.
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.ubsan_standalone_cxx.a',
        'lib/clang/$V/lib/aarch64-unknown-linux-gnu/libclang_rt.ubsan_standalone_cxx.a.syms',
        'lib/clang/$V/lib/i386-unknown-linux-gnu/libclang_rt.ubsan_standalone_cxx.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.ubsan_standalone_cxx.a',
        'lib/clang/$V/lib/x86_64-unknown-linux-gnu/libclang_rt.ubsan_standalone_cxx.a.syms',

        # UndefinedBehaviorSanitizer Android runtime, needed for CFI.
        'lib/clang/$V/lib/linux/libclang_rt.ubsan_standalone-aarch64-android.so',
        'lib/clang/$V/lib/linux/libclang_rt.ubsan_standalone-arm-android.so',
        'lib/clang/$V/lib/linux/libclang_rt.ubsan_standalone-riscv64-android.so',

        # Ignorelist for MemorySanitizer (used on Linux only).
        'lib/clang/$V/share/msan_*list.txt',

        # pylint: enable=line-too-long
    ])
  elif sys.platform == 'win32':
    runtime_package_name = 'clang-win-runtime-library'

    runtime_packages = set([
        # pylint: disable=line-too-long
        'bin/llvm-symbolizer.exe',

        # AddressSanitizer runtime.
        'lib/clang/$V/lib/windows/clang_rt.asan_dynamic-x86_64.dll',
        'lib/clang/$V/lib/windows/clang_rt.asan_dynamic-x86_64.lib',

        # Thunk for AddressSanitizer for component builds.
        'lib/clang/$V/lib/windows/clang_rt.asan_dynamic_runtime_thunk-x86_64.lib',

        # Thunk for AddressSanitizer for static builds.
        'lib/clang/$V/lib/windows/clang_rt.asan_static_runtime_thunk-x86_64.lib',

        # Builtins for C/C++.
        'lib/clang/$V/lib/windows/clang_rt.builtins-i386.lib',
        'lib/clang/$V/lib/windows/clang_rt.builtins-x86_64.lib',
        'lib/clang/$V/lib/windows/clang_rt.builtins-aarch64.lib',

        # Profile runtime (used by profiler and code coverage).
        'lib/clang/$V/lib/windows/clang_rt.profile-i386.lib',
        'lib/clang/$V/lib/windows/clang_rt.profile-x86_64.lib',
        'lib/clang/$V/lib/windows/clang_rt.profile-aarch64.lib',

        # UndefinedBehaviorSanitizer C runtime (pure C won't link with *_cxx).
        'lib/clang/$V/lib/windows/clang_rt.ubsan_standalone-x86_64.lib',

        # UndefinedBehaviorSanitizer C++ runtime.
        'lib/clang/$V/lib/windows/clang_rt.ubsan_standalone_cxx-x86_64.lib',

        # pylint: enable=line-too-long
    ])
    want.update(runtime_packages)

  # reclient is a tool for executing programs remotely. When uploading the
  # binary to be executed, it needs to know which other files the binary depends
  # on. This can include shared libraries, as well as other dependencies not
  # explicitly mentioned in the source code (those would be found by reclient's
  # include scanner) such as sanitizer ignore lists.
  #
  # These paths are written relative to the package root, and will be rebased
  # to wherever the reclient config file is written when added to the file.
  reclient_inputs = {
      'clang':
      set([
          # Note: These have to match the `want` list exactly. `want` uses
          # a glob, so these must too.
          'lib/clang/$V/share/asan_*list.txt',
          'lib/clang/$V/share/cfi_*list.txt',
      ]),
  }
  if sys.platform == 'win32':
    # TODO(crbug.com/335997052): Remove this again once we have a compiler
    # flag that tells clang-cl to not auto-add it (and then explicitly pass
    # it via GN).
    reclient_inputs['clang'].update([
        'lib/clang/$V/lib/windows/clang_rt.ubsan_standalone-x86_64.lib',
        'lib/clang/$V/lib/windows/clang_rt.ubsan_standalone_cxx-x86_64.lib',
        'lib/clang/$V/lib/windows/clang_rt.profile-i386.lib',
        'lib/clang/$V/lib/windows/clang_rt.profile-x86_64.lib',
        'lib/clang/$V/lib/windows/clang_rt.profile-aarch64.lib',
    ])

  # Check that all non-glob wanted files exist on disk.
  want = replace_version(want, RELEASE_VERSION)
  found_all_wanted_files = True
  for w in want:
    if '*' in w: continue
    if os.path.exists(os.path.join(LLVM_RELEASE_DIR, w)): continue
    print('wanted file "%s" but it did not exist' % w, file=sys.stderr)
    found_all_wanted_files = False

  if not found_all_wanted_files:
    return 1

  # Check that all reclient inputs are in the package.
  for tool in reclient_inputs:
    reclient_inputs[tool] = set(
        [i.replace('$V', RELEASE_VERSION) for i in reclient_inputs[tool]])
    missing = reclient_inputs[tool] - want
    if missing:
      print('reclient inputs not part of package: ', missing, file=sys.stderr)
      return 1

  reclient_input_strings = {t: '' for t in reclient_inputs}

  # TODO(thakis): Try walking over want and copying the files in there instead
  # of walking the directory and doing fnmatch() against want.
  for root, dirs, files in os.walk(LLVM_RELEASE_DIR):
    dirs.sort()  # Walk dirs in sorted order.
    # root: third_party/llvm-build/Release+Asserts/lib/..., rel_root: lib/...
    rel_root = root[len(LLVM_RELEASE_DIR)+1:]
    rel_files = [os.path.join(rel_root, f) for f in files]
    wanted_files = list(set(itertools.chain.from_iterable(
        fnmatch.filter(rel_files, p) for p in want)))
    if wanted_files:
      # Guaranteed to not yet exist at this point:
      os.makedirs(os.path.join(pdir, rel_root))
    for f in sorted(wanted_files):
      src = os.path.join(LLVM_RELEASE_DIR, f)
      dest = os.path.join(pdir, f)
      shutil.copy(src, dest)
      # Strip libraries.
      if 'libclang_rt.builtins' in f and 'android' in f:
        # Keep the builtins' DWARF info for unwinding.
        pass
      elif sys.platform == 'darwin' and f.endswith('.dylib'):
        subprocess.call(['strip', '-x', dest])
      elif (sys.platform.startswith('linux') and
            os.path.splitext(f)[1] in ['.so', '.a']):
        subprocess.call([EU_STRIP, '-g', dest])
      # If this is an reclient input, add it to the inputs file(s).
      for tool, inputs in reclient_inputs.items():
        if any(fnmatch.fnmatch(f, i) for i in inputs):
          rel_input = os.path.relpath(dest, os.path.join(pdir, 'bin'))
          reclient_input_strings[tool] += ('%s\n' % rel_input)

  # Write the reclient inputs files.
  if sys.platform != 'win32':
    reclient_input_strings['clang++'] = reclient_input_strings['clang']
    reclient_input_strings['clang-cl'] = reclient_input_strings['clang']
  else:
    reclient_input_strings['clang-cl.exe'] = reclient_input_strings.pop('clang')
  for tool, string in reclient_input_strings.items():
    filename = os.path.join(pdir, 'bin', '%s_remote_toolchain_inputs' % tool)
    print('%s:\n%s' % (filename, string))
    with open(filename, 'w') as f:
      f.write(string)

  # Set up symlinks.
  if sys.platform != 'win32':
    os.symlink('clang', os.path.join(pdir, 'bin', 'clang++'))
    os.symlink('clang', os.path.join(pdir, 'bin', 'clang-cl'))
    os.symlink('lld', os.path.join(pdir, 'bin', 'ld.lld'))
    os.symlink('lld', os.path.join(pdir, 'bin', 'ld64.lld'))
    os.symlink('lld', os.path.join(pdir, 'bin', 'lld-link'))
    os.symlink('lld', os.path.join(pdir, 'bin', 'wasm-ld'))
    os.symlink('llvm-readobj', os.path.join(pdir, 'bin', 'llvm-readelf'))

  if sys.platform.startswith('linux') or sys.platform == 'darwin':
    os.symlink('llvm-objcopy', os.path.join(pdir, 'bin', 'llvm-strip'))
    os.symlink('llvm-objcopy',
               os.path.join(pdir, 'bin', 'llvm-install-name-tool'))

    # Make `--target=*-cros-linux-gnu` work with
    # LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON.
    for arch, abi in [('armv7', 'gnueabihf'), ('aarch64', 'gnu'),
                      ('x86_64', 'gnu')]:
      old = '%s-unknown-linux-%s' % (arch, abi)
      new = old.replace('unknown', 'cros').replace('armv7', 'armv7a')
      os.symlink(
          old, os.path.join(pdir, 'lib', 'clang', RELEASE_VERSION, 'lib', new))

  # Create main archive.
  PackageInArchive(pdir, pdir)
  MaybeUpload(args.upload, args.bucket, pdir + '.tar.xz', gcs_platform)

  # Upload build log next to it.
  os.rename('buildlog.txt', pdir + '-buildlog.txt')
  MaybeUpload(args.upload,
              args.bucket,
              pdir + '-buildlog.txt',
              gcs_platform,
              extra_gsutil_args=['-z', 'txt'])
  os.remove(pdir + '-buildlog.txt')

  # Zip up runtime libraries, if specified.
  if runtime_package_name and len(runtime_packages) > 0:
    runtime_dir = f'{runtime_package_name}-{stamp}'
    shutil.rmtree(runtime_dir, ignore_errors=True)
    for f in sorted(replace_version(runtime_packages, RELEASE_VERSION)):
      os.makedirs(os.path.dirname(os.path.join(runtime_dir, f)), exist_ok=True)
      shutil.copy(
          os.path.join(pdir, f),
          os.path.join(runtime_dir, f),
      )
    PackageInArchive(runtime_dir, runtime_dir)
    MaybeUpload(args.upload, args.bucket, f'{runtime_dir}.tar.xz', gcs_platform)

  # Zip up llvm-code-coverage for code coverage.
  code_coverage_dir = 'llvm-code-coverage-' + stamp
  shutil.rmtree(code_coverage_dir, ignore_errors=True)
  os.makedirs(os.path.join(code_coverage_dir, 'bin'))
  for filename in ['llvm-cov', 'llvm-profdata']:
    shutil.copy(os.path.join(LLVM_RELEASE_DIR, 'bin', filename + exe_ext),
                os.path.join(code_coverage_dir, 'bin'))
  PackageInArchive(code_coverage_dir, code_coverage_dir)
  MaybeUpload(args.upload, args.bucket, code_coverage_dir + '.tar.xz',
              gcs_platform)

  # Zip up llvm-objdump and related tools for sanitizer coverage and Supersize.
  objdumpdir = 'llvmobjdump-' + stamp
  shutil.rmtree(objdumpdir, ignore_errors=True)
  os.makedirs(os.path.join(objdumpdir, 'bin'))
  for filename in [
      'llvm-bcanalyzer', 'llvm-cxxfilt', 'llvm-dwarfdump', 'llvm-nm',
      'llvm-objdump'
  ]:
    shutil.copy(os.path.join(LLVM_RELEASE_DIR, 'bin', filename + exe_ext),
                os.path.join(objdumpdir, 'bin'))
  llvmobjdump_stamp_file_base = 'llvmobjdump_build_revision'
  llvmobjdump_stamp_file = os.path.join(objdumpdir, llvmobjdump_stamp_file_base)
  with open(llvmobjdump_stamp_file, 'w') as f:
    f.write(expected_stamp)
    f.write('\n')
  if sys.platform != 'win32':
    os.symlink('llvm-objdump', os.path.join(objdumpdir, 'bin', 'llvm-otool'))
  PackageInArchive(objdumpdir, objdumpdir)
  MaybeUpload(args.upload, args.bucket, objdumpdir + '.tar.xz', gcs_platform)

  # Zip up clang-tidy for users who opt into it, and Tricium.
  clang_tidy_dir = 'clang-tidy-' + stamp
  shutil.rmtree(clang_tidy_dir, ignore_errors=True)
  os.makedirs(os.path.join(clang_tidy_dir, 'bin'))
  shutil.copy(os.path.join(LLVM_RELEASE_DIR, 'bin', 'clang-tidy' + exe_ext),
              os.path.join(clang_tidy_dir, 'bin'))
  PackageInArchive(clang_tidy_dir, clang_tidy_dir)
  MaybeUpload(args.upload, args.bucket, clang_tidy_dir + '.tar.xz',
              gcs_platform)

  # Zip up clangd and related tools for users who opt into it.
  clangd_dir = 'clangd-' + stamp
  shutil.rmtree(clangd_dir, ignore_errors=True)
  os.makedirs(os.path.join(clangd_dir, 'bin'))
  shutil.copy(os.path.join(LLVM_RELEASE_DIR, 'bin', 'clangd' + exe_ext),
              os.path.join(clangd_dir, 'bin'))
  shutil.copy(
      os.path.join(LLVM_RELEASE_DIR, 'bin', 'clang-include-cleaner' + exe_ext),
      os.path.join(clangd_dir, 'bin'))
  PackageInArchive(clangd_dir, clangd_dir)
  MaybeUpload(args.upload, args.bucket, clangd_dir + '.tar.xz', gcs_platform)

  # Zip up clang-format so we can update it (separately from the clang roll).
  clang_format_dir = 'clang-format-' + stamp
  shutil.rmtree(clang_format_dir, ignore_errors=True)
  os.makedirs(os.path.join(clang_format_dir, 'bin'))
  shutil.copy(os.path.join(LLVM_RELEASE_DIR, 'bin', 'clang-format' + exe_ext),
              os.path.join(clang_format_dir, 'bin'))
  PackageInArchive(clang_format_dir, clang_format_dir)
  MaybeUpload(args.upload, args.bucket, clang_format_dir + '.tar.xz',
              gcs_platform)

  if sys.platform == 'darwin':
    # dsymutil isn't part of the main zip, and it gets periodically
    # deployed to CIPD (manually, not as part of clang rolls) for use in the
    # Mac build toolchain.
    dsymdir = 'dsymutil-' + stamp
    shutil.rmtree(dsymdir, ignore_errors=True)
    os.makedirs(os.path.join(dsymdir, 'bin'))
    shutil.copy(os.path.join(LLVM_RELEASE_DIR, 'bin', 'dsymutil'),
                os.path.join(dsymdir, 'bin'))
    PackageInArchive(dsymdir, dsymdir)
    MaybeUpload(args.upload, args.bucket, dsymdir + '.tar.xz', gcs_platform)

  # Zip up the translation_unit tool.
  translation_unit_dir = 'translation_unit-' + stamp
  shutil.rmtree(translation_unit_dir, ignore_errors=True)
  os.makedirs(os.path.join(translation_unit_dir, 'bin'))
  shutil.copy(os.path.join(LLVM_RELEASE_DIR, 'bin', 'translation_unit' +
                           exe_ext),
              os.path.join(translation_unit_dir, 'bin'))
  PackageInArchive(translation_unit_dir, translation_unit_dir)
  MaybeUpload(args.upload, args.bucket, translation_unit_dir + '.tar.xz',
              gcs_platform)

  # Zip up the libclang binaries.
  libclang_dir = 'libclang-' + stamp
  shutil.rmtree(libclang_dir, ignore_errors=True)
  os.makedirs(os.path.join(libclang_dir, 'bin'))
  os.makedirs(os.path.join(libclang_dir, 'bindings', 'python', 'clang'))
  if sys.platform == 'win32':
    shutil.copy(os.path.join(LLVM_RELEASE_DIR, 'bin', 'libclang.dll'),
                os.path.join(libclang_dir, 'bin'))
  py_bindings_dir = os.path.join(LLVM_DIR, 'clang', 'bindings', 'python',
                                 'clang')
  for filename in os.listdir(py_bindings_dir):
    shutil.copy(os.path.join(py_bindings_dir, filename),
                os.path.join(libclang_dir, 'bindings', 'python', 'clang'))
  PackageInArchive(libclang_dir, libclang_dir)
  MaybeUpload(args.upload, args.bucket, libclang_dir + '.tar.xz', gcs_platform)

  if sys.platform == 'win32' and args.upload:
    binaries = [f for f in want if f.endswith('.exe') or f.endswith('.dll')]
    assert 'bin/clang-cl.exe' in binaries
    assert 'bin/lld-link.exe' in binaries
    start = time.time()
    UploadPDBsToSymbolServer(binaries)
    end = time.time()
    print('symbol upload took', end - start, 'seconds')

  # FIXME: Warn if the file already exists on the server.


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