#!/usr/bin/env python
# Copyright (C) 2017 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import argparse
import hashlib
import logging
import os
import shutil
import subprocess
import sys
import tempfile
import zipfile

from collections import namedtuple
from platform import system


# The format for the deps below is the following:
# (target_folder, source_url, sha1, target_platform)
# |source_url| can be either a git repo or a http url.
# If a git repo, |sha1| is the committish that will be checked out.
# If a http url, |sha1| is the shasum of the original file.
# If the url is a .zip or .tgz file it will be automatically deflated under
# |target_folder|, taking care of stripping the root folder if it's a single
# root (to avoid ending up with buildtools/protobuf/protobuf-1.2.3/... and have
# instead just buildtools/protobuf).
# |target_platform| is either 'darwin', 'linux' or 'all' and applies the dep
# only on the given platform

# Dependencies required to build code on the host or when targeting desktop OS.
BUILD_DEPS_HOST = [
    # GN
    ('buildtools/mac/gn',
     'https://storage.googleapis.com/perfetto/gn-mac-1695-83dad00a',
     '4c0d45772aea4146699772165e8112fa76ceb295', 'darwin'),
    ('buildtools/linux64/gn',
     'https://storage.googleapis.com/perfetto/gn-linux64-1695-83dad00a',
     'fcabfc379bccaa65b4e2fc791594ba124dafc7d0', 'linux'),

    # clang-format
    ('buildtools/mac/clang-format',
     'https://storage.googleapis.com/chromium-clang-format/025ca7c75f37ef4a40f3a67d81ddd11d7d0cdb9b',
     '025ca7c75f37ef4a40f3a67d81ddd11d7d0cdb9b', 'darwin'),
    ('buildtools/linux64/clang-format',
     'https://storage.googleapis.com/chromium-clang-format/942fc8b1789144b8071d3fc03ff0fcbe1cf81ac8',
     '942fc8b1789144b8071d3fc03ff0fcbe1cf81ac8', 'linux'),
    # Keep the SHA1 in sync with |clang_format_rev| in chromium //buildtools/DEPS.
    ('buildtools/clang_format/script',
     'https://chromium.googlesource.com/chromium/llvm-project/cfe/tools/clang-format.git',
     '96636aa0e9f047f17447f2d45a094d0b59ed7917', 'all'),

    # Ninja
    ('buildtools/mac/ninja',
     'https://storage.googleapis.com/perfetto/ninja-mac-c15b0698da038b2bd2e8970c14c75fadc06b1add',
     'c15b0698da038b2bd2e8970c14c75fadc06b1add', 'darwin'),
    ('buildtools/linux64/ninja',
     'https://storage.googleapis.com/perfetto/ninja-linux64-c866952bda50c29a669222477309287119bbb7e8',
     'c866952bda50c29a669222477309287119bbb7e8', 'linux'),

    # Keep in sync with Android's //external/googletest/README.version.
    ('buildtools/googletest.zip',
     'https://github.com/google/googletest/archive/3f05f651ae3621db58468153e32016bc1397800b.zip',
     '86384688f7c533ad325a505efc917e0cdf39a0ce', 'all'),

    # Keep in sync with Chromium's //third_party/protobuf.
    ('buildtools/protobuf.zip',
     'https://github.com/protocolbuffers/protobuf/releases/download/v3.9.0/protobuf-cpp-3.9.0.zip',
     'c975536dffe9d9a3d362928aef4fb9f199012b98', 'all'),

    # libc++, libc++abi and libunwind for Linux where we need to rebuild the C++
    # lib from sources. Keep the SHA1s in sync with Chrome's src/buildtools/DEPS.
    ('buildtools/libcxx',
     'https://chromium.googlesource.com/chromium/llvm-project/libcxx.git',
     '78d6a7767ed57b50122a161b91f59f19c9bd0d19', 'all'),
    ('buildtools/libcxxabi',
     'https://chromium.googlesource.com/chromium/llvm-project/libcxxabi.git',
     '0d529660e32d77d9111912d73f2c74fc5fa2a858', 'all'),
    ('buildtools/libunwind',
     'https://chromium.googlesource.com/external/llvm.org/libunwind.git',
     '69d9b84cca8354117b9fe9705a4430d789ee599b', 'all'),

    # Keep the revision in sync with Chrome's PACKAGE_VERSION in
    # tools/clang/scripts/update.py.
    ('buildtools/clang.tgz',
     'https://commondatastorage.googleapis.com/chromium-browser-clang/Linux_x64/clang-n332890-c2443155-2.tgz',
     'd6501ffdb5dbb0ffe8a4b873cc092a9929e661ec', 'linux'),

    # Keep in sync with chromium DEPS.
    ('buildtools/libfuzzer',
     'https://chromium.googlesource.com/chromium/llvm-project/compiler-rt/lib/fuzzer.git',
     'debe7d2d1982e540fbd6bd78604bf001753f9e74', 'linux'),

    # Benchmarking tool.
    ('buildtools/benchmark.zip',
     'https://github.com/google/benchmark/archive/v1.5.0.zip',
     'a9c9bd8a28db82f5ba02998197cfcc4db5a67507', 'all'),

    # Libbacktrace, for stacktraces in Linux/Android debug builds.
    ('buildtools/libbacktrace.zip',
     'https://github.com/ianlancetaylor/libbacktrace/archive/177940370e4a6b2509e92a0aaa9749184e64af43.zip',
     'b723fe9d671d1ab54df1297f6afbf2893a41c3ea', 'all'),

    # Sqlite for the trace processing library.
    # This is the amalgamated source whose compiled output is meant to be faster.
    # We still pull the full source for the extensions (not amalgamated).
    ('buildtools/sqlite.zip',
     'https://storage.googleapis.com/perfetto/sqlite-amalgamation-3250300.zip',
     'b78c2cb0d2c9182686c582312479f96a82bf5380', 'all'),
    ('buildtools/sqlite_src.zip',
     'https://storage.googleapis.com/perfetto/sqlite-src-3250300.zip',
     'd1af2883bb800852946f9bf8ab6055e7698e18ee', 'all'),

    # JsonCpp for legacy json import. Used only by the trace processor in
    # standalone builds.
    ('buildtools/jsoncpp.zip',
     'https://github.com/open-source-parsers/jsoncpp/archive/1.0.0.zip',
     '3219e26f2e249bb46b7d688478208c7ec138fea4', 'all'),

    # These dependencies are for libunwindstack, which is used by src/profiling.
    ('buildtools/android-core',
     'https://android.googlesource.com/platform/system/core.git',
     '8bf4e29e44098e3232ff646331675fb113064162', 'all'),
    ('buildtools/lzma',
     'https://android.googlesource.com/platform/external/lzma.git',
     '7851dce6f4ca17f5caa1c93a4e0a45686b1d56c3', 'all'),
    ('buildtools/zlib',
     'https://android.googlesource.com/platform/external/zlib.git',
     'dfa0646a03b4e1707469e04dc931b09774968fe6', 'all'),
    ('buildtools/bionic',
     'https://android.googlesource.com/platform/bionic.git',
     'a60488109cda997dfd83832731c8527feaa2825e', 'all'),

    # Example traces for regression tests.
    (
        'buildtools/test_data.zip',
        'https://storage.googleapis.com/perfetto/test-data-20200604-140632.zip',
        '2c0a3307f25730d0060d7554d0e59c078c80a366',
        'all',
    ),

    # Linenoise, used only by trace_processor in standalone builds.
    ('buildtools/linenoise',
     'https://fuchsia.googlesource.com/third_party/linenoise.git',
     'c894b9e59f02203dbe4e2be657572cf88c4230c3', 'all'),
]

# Dependencies required to build Android code.
# URLs and SHA1s taken from:
# - https://dl.google.com/android/repository/repository-11.xml
# - https://dl.google.com/android/repository/sys-img/android/sys-img.xml
BUILD_DEPS_ANDROID = [
    # Android NDK
    ('buildtools/ndk.zip',
     'https://dl.google.com/android/repository/android-ndk-r17b-darwin-x86_64.zip',
     'f990aafaffec0b583d2c5420bfa622e52ac14248', 'darwin'),
    ('buildtools/ndk.zip',
     'https://dl.google.com/android/repository/android-ndk-r17b-linux-x86_64.zip',
     'dd5762ee7ef4995ad04fe0c45a608c344d99ca9f', 'linux'),
]

# Dependencies required to run Android tests.
TEST_DEPS_ANDROID = [
    # Android emulator images.
    ('buildtools/aosp-arm.zip',
     'https://storage.googleapis.com/perfetto/aosp-02022018-arm.zip',
     'a480d5e7d3ca888b0a58fe15ce76b1791537429a', 'all'),

    # platform-tools.zip contains adb binaries.
    ('buildtools/android_sdk/platform-tools.zip',
     'https://dl.google.com/android/repository/platform-tools_r26.0.0-darwin.zip',
     'e75b6137dc444f777eb02f44a6d9819b3aabff82', 'darwin'),
    ('buildtools/android_sdk/platform-tools.zip',
     'https://dl.google.com/android/repository/platform-tools_r26.0.0-linux.zip',
     '00de8a6631405b617c10f68cd11ff2e1cd528e23', 'linux'),

    # Android emulator binaries.
    ('buildtools/emulator',
     'https://android.googlesource.com/platform/prebuilts/android-emulator.git',
     '4b260028dc27bc92c39bee9129cb2ba839970956', 'all'),
]

# This variable is updated by tools/roll-catapult-trace-viewer.
CATAPULT_SHA1 = '5f77256e1b24851a05e8580438b532e2480dd7fd'

TYPEFACES_SHA1 = '4fb455de506f8a2859dc5264b8448c2559b08ab8'

UI_DEPS = [
    ('buildtools/nodejs.tgz',
     'https://storage.googleapis.com/perfetto/node-v10.3.0-darwin-x64.tar.gz',
     '6d9a122785f38c256add3b25f74adf125497861a', 'darwin'),
    ('buildtools/nodejs.tgz',
     'https://storage.googleapis.com/perfetto/node-v10.3.0-linux-x64.tar.xz',
     '118f6ea19f75089b3f12ac2ddfce357bff872b5e', 'linux'),
    ('buildtools/emsdk/emscripten.tgz',
     'https://storage.googleapis.com/perfetto/emscripten-1.37.40.tar.gz',
     '588c28221321ebbdfc8e3a6f47ea6106f589669b', 'all'),
    ('buildtools/emsdk/llvm.tgz',
     'https://storage.googleapis.com/perfetto/emscripten-llvm-e1.37.40-darwin.tar.gz',
     '7a894ef0a52821c62f6abaac552dc4ce5d424607', 'darwin'),
    ('buildtools/emsdk/llvm.tgz',
     'https://storage.googleapis.com/perfetto/emscripten-llvm-e1.37.40-static-linux.tar.gz',
     '478501b9b7a14884e546c84efe209a90052cbb07', 'linux'),
    ('buildtools/d8.tgz',
     'https://storage.googleapis.com/perfetto/d8-linux-5.7.492.65.tar.gz',
     '95e82ad7faf0a6f74d950c2aa65e3858b7bdb6c6', 'linux'),
    ('buildtools/d8.tgz',
     'https://storage.googleapis.com/perfetto/d8-darwin-6.6.346.32.tar.gz',
     '1abd630619bb1977ab62095570a113d782a1545d', 'darwin'),
    ('buildtools/catapult_trace_viewer.tgz',
     'https://storage.googleapis.com/perfetto/catapult_trace_viewer-%s.tar.gz' %
     CATAPULT_SHA1, CATAPULT_SHA1, 'all'),
    ('buildtools/typefaces.tgz',
     'https://storage.googleapis.com/perfetto/typefaces-%s.tar.gz' %
     TYPEFACES_SHA1, TYPEFACES_SHA1, 'all')
]

ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
UI_DIR = os.path.join(ROOT_DIR, 'ui')
NODE_MODULES_STATUS_FILE = os.path.join(UI_DIR, 'node_modules', '.last_install')


def DownloadURL(url, out_file):
  subprocess.check_call(['curl', '-L', '-#', '-o', out_file, url])


def ReadFile(path):
  if not os.path.exists(path):
    return None
  with open(path) as f:
    return f.read().strip()


def MkdirRecursive(path):
  # Works with both relative and absolute paths
  cwd = '/' if path.startswith('/') else ROOT_DIR
  for part in path.split('/'):
    cwd = os.path.join(cwd, part)
    if not os.path.exists(cwd):
      os.makedirs(cwd)
    else:
      assert (os.path.isdir(cwd))


def HashLocalFile(path):
  if not os.path.exists(path):
    return None
  with open(path, 'rb') as f:
    return hashlib.sha1(f.read()).hexdigest()


def ExtractZipfilePreservePermissions(zf, info, path):
  zf.extract(info.filename, path=path)
  target_path = os.path.join(path, info.filename)
  min_acls = 0o755 if info.filename.endswith('/') else 0o644
  os.chmod(target_path, (info.external_attr >> 16) | min_acls)


def IsGitRepoCheckoutOutAtRevision(path, revision):
  return ReadFile(os.path.join(path, '.git', 'HEAD')) == revision


def CheckoutGitRepo(path, git_url, revision, check_only):
  if IsGitRepoCheckoutOutAtRevision(path, revision):
    return False
  if check_only:
    return True
  if os.path.exists(path):
    shutil.rmtree(path)
  MkdirRecursive(path)
  logging.info('Fetching %s @ %s into %s', git_url, revision, path)
  subprocess.check_call(['git', 'init', path], cwd=path)
  subprocess.check_call(
      ['git', 'fetch', '--quiet', '--depth', '1', git_url, revision], cwd=path)
  subprocess.check_call(['git', 'checkout', revision, '--quiet'], cwd=path)
  assert (IsGitRepoCheckoutOutAtRevision(path, revision))
  return True


def InstallNodeModules():
  logging.info("Running npm install in {0}".format(UI_DIR))
  subprocess.check_call([os.path.join(UI_DIR, 'npm'), 'install', '--no-save'],
                        cwd=UI_DIR)
  with open(NODE_MODULES_STATUS_FILE, 'w') as f:
    f.write(HashLocalFile(os.path.join(UI_DIR, 'package-lock.json')))


def CheckNodeModules():
  """Returns True if the modules are up-to-date.

  There doesn't seem to be an easy way to check node modules versions. Instead
  just check if package-lock.json changed since the last `npm install` call.
  """
  if not os.path.exists(NODE_MODULES_STATUS_FILE):
    return False
  with open(NODE_MODULES_STATUS_FILE, 'r') as f:
    actual = f.read()
  expected = HashLocalFile(os.path.join(UI_DIR, 'package-lock.json'))
  return expected == actual


def CheckHashes():
  for deps in [BUILD_DEPS_HOST, BUILD_DEPS_ANDROID, TEST_DEPS_ANDROID, UI_DEPS]:
    for rel_path, url, expected_sha1, platform in deps:
      if url.endswith('.git'):
        continue
      logging.info('Downloading %s from %s', rel_path, url)
      with tempfile.NamedTemporaryFile(delete=False) as f:
        f.close()
        DownloadURL(url, f.name)
        actual_sha1 = HashLocalFile(f.name)
        os.unlink(f.name)
        if (actual_sha1 != expected_sha1):
          logging.fatal('SHA1 mismatch for {} expected {} was {}'.format(
              url, expected_sha1, actual_sha1))


def Main():
  parser = argparse.ArgumentParser()
  parser.add_argument('--android', action='store_true')
  parser.add_argument('--ui', action='store_true')
  parser.add_argument('--check-only')
  parser.add_argument('--verify', help='Check all URLs', action='store_true')
  args = parser.parse_args()
  if args.verify:
    CheckHashes()
    return 0
  deps = BUILD_DEPS_HOST
  if args.android:
    deps += BUILD_DEPS_ANDROID + TEST_DEPS_ANDROID
  if args.ui:
    deps += UI_DEPS
  deps_updated = False
  for rel_path, url, expected_sha1, platform in deps:
    if (platform != 'all' and platform != system().lower()):
      continue
    local_path = os.path.join(ROOT_DIR, rel_path)
    if url.endswith('.git'):
      deps_updated |= CheckoutGitRepo(local_path, url, expected_sha1,
                                      args.check_only)
      continue
    is_zip = local_path.endswith('.zip') or local_path.endswith('.tgz')
    zip_target_dir = local_path[:-4] if is_zip else None
    zip_dir_stamp = os.path.join(zip_target_dir, '.stamp') if is_zip else None

    if ((not is_zip and HashLocalFile(local_path) == expected_sha1) or
        (is_zip and ReadFile(zip_dir_stamp) == expected_sha1)):
      continue
    deps_updated = True
    if args.check_only:
      continue
    MkdirRecursive(os.path.dirname(rel_path))
    if HashLocalFile(local_path) != expected_sha1:
      download_path = local_path + '.tmp'
      logging.info('Downloading %s from %s', local_path, url)
      DownloadURL(url, download_path)
      os.chmod(download_path, 0o755)
      actual_sha1 = HashLocalFile(download_path)
      if (actual_sha1 != expected_sha1):
        os.remove(download_path)
        logging.fatal('SHA1 mismatch for {} expected {} was {}'.format(
            download_path, expected_sha1, actual_sha1))
        return 1
      os.rename(download_path, local_path)
    assert (HashLocalFile(local_path) == expected_sha1)

    if is_zip:
      logging.info('Extracting %s into %s' % (local_path, zip_target_dir))
      assert (os.path.commonprefix((ROOT_DIR, zip_target_dir)) == ROOT_DIR)
      if os.path.exists(zip_target_dir):
        logging.info('Deleting stale dir %s' % zip_target_dir)
        shutil.rmtree(zip_target_dir)

      # Decompress the archive.
      if local_path.endswith('.tgz'):
        MkdirRecursive(zip_target_dir)
        subprocess.check_call(['tar', '-xf', local_path], cwd=zip_target_dir)
      elif local_path.endswith('.zip'):
        with zipfile.ZipFile(local_path, 'r') as zf:
          for info in zf.infolist():
            ExtractZipfilePreservePermissions(zf, info, zip_target_dir)

      # If the zip contains one root folder, rebase one level up moving all
      # its sub files and folders inside |target_dir|.
      subdir = os.listdir(zip_target_dir)
      if len(subdir) == 1:
        subdir = os.path.join(zip_target_dir, subdir[0])
        if os.path.isdir(subdir):
          for subf in os.listdir(subdir):
            shutil.move(os.path.join(subdir, subf), zip_target_dir)
          os.rmdir(subdir)

      # Create stamp and remove the archive.
      with open(zip_dir_stamp, 'w') as stamp_file:
        stamp_file.write(expected_sha1)
      os.remove(local_path)

  if args.ui:
    # Needs to happen after nodejs is installed above.
    if args.check_only:
      deps_updated = not CheckNodeModules()
    else:
      InstallNodeModules()

  if args.check_only:
    if not deps_updated:
      with open(args.check_only, 'w') as f:
        f.write('OK')  # The content is irrelevant, just keep GN happy.
      return 0
    argz = ' '.join([x for x in sys.argv[1:] if not '--check-only' in x])
    sys.stderr.write('\033[91mBuild deps are stale. ' +
                     'Please run tools/install-build-deps %s\033[0m' % argz)
    return 1

  if deps_updated:
    # Stale binary files may be compiled against old sysroot headers that aren't
    # tracked by gn.
    logging.warning('Remember to run "gn clean <output_directory>" ' +
                    'to avoid stale binary files.')


if __name__ == '__main__':
  logging.basicConfig(level=logging.INFO)
  sys.exit(Main())