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51 lines
1.3 KiB
51 lines
1.3 KiB
4 months ago
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"""
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Generate the contents of the git_sha1.h file.
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"""
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import argparse
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import os
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import os.path
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import subprocess
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import sys
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def get_git_sha1():
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"""Try to get the git SHA1 with git rev-parse."""
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git_dir = os.path.join(os.path.dirname(sys.argv[0]), '..', '.git')
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try:
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git_sha1 = subprocess.check_output([
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'git',
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'--git-dir=' + git_dir,
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'rev-parse',
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'HEAD',
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], stderr=open(os.devnull, 'w')).decode("ascii")
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except Exception:
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# don't print anything if it fails
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git_sha1 = ''
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return git_sha1
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def write_if_different(contents):
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"""
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Avoid touching the output file if it doesn't need modifications
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Useful to avoid triggering rebuilds when nothing has changed.
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"""
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if os.path.isfile(args.output):
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with open(args.output, 'r') as file:
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if file.read() == contents:
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return
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with open(args.output, 'w') as file:
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file.write(contents)
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parser = argparse.ArgumentParser()
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parser.add_argument('--output', help='File to write the #define in',
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required=True)
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args = parser.parse_args()
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git_sha1 = os.environ.get('MESA_GIT_SHA1_OVERRIDE', get_git_sha1())[:10]
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if git_sha1:
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write_if_different('#define MESA_GIT_SHA1 " (git-' + git_sha1 + ')"')
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else:
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write_if_different('#define MESA_GIT_SHA1 ""')
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