114 lines
3.7 KiB
Python
114 lines
3.7 KiB
Python
#!/usr/bin/env python3
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# Copyright 2022 The Dawn Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os, subprocess, sys
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from generator_lib import Generator, run_generator, FileRender
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def get_git():
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return 'git.bat' if sys.platform == 'win32' else 'git'
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def get_gitHash(dawnDir):
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result = subprocess.run([get_git(), 'rev-parse', 'HEAD'],
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stdout=subprocess.PIPE,
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cwd=dawnDir)
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if result.returncode == 0:
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return result.stdout.decode('utf-8').strip()
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# No hash was available (possibly) because the directory was not a git checkout. Dawn should
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# explicitly handle its absenece and disable features relying on the hash, i.e. caching.
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return ''
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def get_gitHead(dawnDir):
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return os.path.join(dawnDir, '.git', 'HEAD')
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def gitExists(dawnDir):
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return os.path.exists(get_gitHead(dawnDir))
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def unpackGitRef(packed, resolved):
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with open(packed) as fin:
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refs = fin.read().strip().split('\n')
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# Strip comments
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refs = [ref.split(' ') for ref in refs if ref.strip()[0] != '#']
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# Parse results which are in the format [<gitHash>, <refFile>] from previous step.
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refs = [gitHash for (gitHash, refFile) in refs if refFile == resolved]
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if len(refs) == 1:
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with open(resolved, 'w') as fout:
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fout.write(refs[0] + '\n')
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return True
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return False
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def get_gitResolvedHead(dawnDir):
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result = subprocess.run(
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[get_git(), 'rev-parse', '--symbolic-full-name', 'HEAD'],
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stdout=subprocess.PIPE,
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cwd=dawnDir)
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if result.returncode != 0:
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raise Exception('Failed to execute git rev-parse to resolve git head.')
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resolved = os.path.join(dawnDir, '.git',
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result.stdout.decode('utf-8').strip())
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# Check a packed-refs file exists. If so, we need to potentially unpack and include it as a dep.
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packed = os.path.join(dawnDir, '.git', 'packed-refs')
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if os.path.exists(packed) and unpackGitRef(packed, resolved):
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return [packed, resolved]
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if not os.path.exists(resolved):
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raise Exception('Unable to resolve git HEAD hash file:', path)
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return [resolved]
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def compute_params(args):
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return {
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'get_gitHash': lambda: get_gitHash(os.path.abspath(args.dawn_dir)),
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}
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class DawnVersionGenerator(Generator):
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def get_description(self):
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return 'Generates version dependent Dawn code. Currently regenerated dependent on git hash.'
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def add_commandline_arguments(self, parser):
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parser.add_argument('--dawn-dir',
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required=True,
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type=str,
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help='The Dawn root directory path to use')
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def get_dependencies(self, args):
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dawnDir = os.path.abspath(args.dawn_dir)
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if gitExists(dawnDir):
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return [get_gitHead(dawnDir)] + get_gitResolvedHead(dawnDir)
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return []
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def get_file_renders(self, args):
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params = compute_params(args)
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return [
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FileRender('dawn/common/Version.h',
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'src/dawn/common/Version_autogen.h', [params]),
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]
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if __name__ == '__main__':
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sys.exit(run_generator(DawnVersionGenerator()))
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