85 lines
3.2 KiB
Python
85 lines
3.2 KiB
Python
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#!/usr/bin/env python
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"""Gets the current revision and writes it to VCSRevision.h."""
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from __future__ import print_function
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import argparse
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import os
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import subprocess
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import sys
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THIS_DIR = os.path.abspath(os.path.dirname(__file__))
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LLVM_DIR = os.path.dirname(os.path.dirname(os.path.dirname(THIS_DIR)))
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def which(program):
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# distutils.spawn.which() doesn't find .bat files,
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# https://bugs.python.org/issue2200
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for path in os.environ["PATH"].split(os.pathsep):
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candidate = os.path.join(path, program)
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if os.path.isfile(candidate) and os.access(candidate, os.X_OK):
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return candidate
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return None
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def main():
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument('-d', '--depfile',
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help='if set, writes a depfile that causes this script '
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'to re-run each time the current revision changes')
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parser.add_argument('--write-git-rev', action='store_true',
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help='if set, writes git revision, else writes #undef')
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parser.add_argument('--name', action='append',
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help='if set, writes a depfile that causes this script '
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'to re-run each time the current revision changes')
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parser.add_argument('vcs_header', help='path to the output file to write')
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args = parser.parse_args()
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vcsrevision_contents = ''
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if args.write_git_rev:
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git, use_shell = which('git'), False
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if not git: git = which('git.exe')
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if not git: git, use_shell = which('git.bat'), True
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git_dir = subprocess.check_output(
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[git, 'rev-parse', '--git-dir'],
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cwd=LLVM_DIR, shell=use_shell).decode().strip()
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if not os.path.isdir(git_dir):
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print('.git dir not found at "%s"' % git_dir, file=sys.stderr)
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return 1
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rev = subprocess.check_output(
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[git, 'rev-parse', '--short', 'HEAD'],
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cwd=git_dir, shell=use_shell).decode().strip()
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url = subprocess.check_output(
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[git, 'remote', 'get-url', 'origin'],
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cwd=git_dir, shell=use_shell).decode().strip()
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for name in args.name:
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vcsrevision_contents += '#define %s_REVISION "%s"\n' % (name, rev)
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vcsrevision_contents += '#define %s_REPOSITORY "%s"\n' % (name, url)
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else:
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for name in args.name:
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vcsrevision_contents += '#undef %s_REVISION\n' % name
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vcsrevision_contents += '#undef %s_REPOSITORY\n' % name
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# If the output already exists and is identical to what we'd write,
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# return to not perturb the existing file's timestamp.
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if os.path.exists(args.vcs_header) and \
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open(args.vcs_header).read() == vcsrevision_contents:
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return 0
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# http://neugierig.org/software/blog/2014/11/binary-revisions.html
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if args.depfile:
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build_dir = os.getcwd()
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with open(args.depfile, 'w') as depfile:
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depfile.write('%s: %s\n' % (
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args.vcs_header,
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os.path.relpath(os.path.join(git_dir, 'logs', 'HEAD'),
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build_dir)))
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open(args.vcs_header, 'w').write(vcsrevision_contents)
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if __name__ == '__main__':
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sys.exit(main())
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