1# Copyright 2018 The Chromium Authors. All rights reserved.
2# Use of this source code is governed by a BSD-style license that can be
3# found in the LICENSE file.
4
5DOCKER_IMAGE = 'gcr.io/skia-public/canvaskit-emsdk:1.38.27_v1'
6INNER_BUILD_SCRIPT = '/SRC/skia/infra/canvaskit/build_canvaskit.sh'
7
8BUILD_PRODUCTS_ISOLATE_WHITELIST_WASM = [
9  'canvaskit.*'
10]
11
12
13def compile_fn(api, checkout_root, _ignore):
14  out_dir = api.vars.cache_dir.join('docker', 'canvaskit')
15  configuration = api.vars.builder_cfg.get('configuration', '')
16  extra = api.vars.builder_cfg.get('extra_config', '')
17
18  # We want to make sure the directories exist and were created by chrome-bot,
19  # because if that isn't the case, docker will make them and they will be
20  # owned by root, which causes mysterious failures. To mitigate this risk
21  # further, we don't use the same out_dir as everyone else (thus the _ignore)
22  # param. Instead, we use a "canvaskit" subdirectory in the "docker" named_cache.
23  api.file.ensure_directory('mkdirs out_dir', out_dir, mode=0777)
24
25  # This uses the emscriptem sdk docker image and says "run the
26  # build_canvaskit.sh helper script in there". Additionally, it binds two
27  # folders: the Skia checkout to /SRC and the output directory to /OUT
28  # The called helper script will make the compile happen and put the
29  # output in the right spot.  The neat thing is that since the Skia checkout
30  # (and, by extension, the build script) is not a part of the image, but
31  # bound in at runtime, we don't have to re-build the image, except when the
32  # toolchain changes.
33  # Of note, the wasm build doesn't re-use any intermediate steps from the
34  # previous builds, so it's essentially a build from scratch every time.
35  cmd = ['docker', 'run', '--rm', '--volume', '%s:/SRC' % checkout_root,
36         '--volume', '%s:/OUT' % out_dir,
37         DOCKER_IMAGE, INNER_BUILD_SCRIPT]
38  if 'CPU' in extra:
39    cmd.append('cpu') # It defaults to gpu
40
41  if configuration == 'Debug':
42    cmd.append('debug') # It defaults to Release
43  # Override DOCKER_CONFIG set by Kitchen.
44  env = {'DOCKER_CONFIG': '/home/chrome-bot/.docker'}
45  with api.env(env):
46    api.run(
47        api.step,
48        'Build CanvasKit with Docker',
49        cmd=cmd)
50
51
52def copy_extra_build_products(api, _ignore, dst):
53  out_dir = api.vars.cache_dir.join('docker', 'canvaskit')
54  # We don't use the normal copy_build_products because it uses
55  # shutil.move, which attempts to delete the previous file, which
56  # doesn't work because the docker created outputs are read-only and
57  # owned by root (aka only docker images). It's likely safe to change
58  # the shutil.move in the original script to a non-deleting thing
59  # (like copy or copyfile), but there's some subtle behavior differences
60  # especially with directories, that kjlubick felt it best not to risk it.
61  api.python.inline(
62      name='copy wasm output',
63      program='''import errno
64import glob
65import os
66import shutil
67import sys
68
69src = sys.argv[1]
70dst = sys.argv[2]
71build_products_whitelist = %s
72
73try:
74  os.makedirs(dst)
75except OSError as e:
76  if e.errno != errno.EEXIST:
77    raise
78
79for pattern in build_products_whitelist:
80  path = os.path.join(src, pattern)
81  for f in glob.glob(path):
82    dst_path = os.path.join(dst, os.path.relpath(f, src))
83    if not os.path.isdir(os.path.dirname(dst_path)):
84      os.makedirs(os.path.dirname(dst_path))
85    print 'Copying build product %%s to %%s' %% (f, dst_path)
86    # Because Docker usually has some strange permissions (like root
87    # ownership), we'd rather not keep those around. copyfile doesn't
88    # keep the metadata around, so that helps us.
89    shutil.copyfile(f, dst_path)
90''' % str(BUILD_PRODUCTS_ISOLATE_WHITELIST_WASM),
91      args=[out_dir, dst],
92      infra_step=True)
93