49 lines
2.2 KiB
Python
49 lines
2.2 KiB
Python
#!/usr/bin/env python3
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"""Fetch the pinned Slang compiler and verify its upstream release digest."""
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import argparse
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import hashlib
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import pathlib
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import platform
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import tarfile
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import urllib.request
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import zipfile
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VERSION = '2026.18'
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PACKAGES = {
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'Linux': ('linux-x86_64-glibc-2.28.tar.gz', '8f27819f6bce2e37f3549e204b57a954d8daee67a5a5735cdc437b8bc7b87a50'),
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'Windows': ('windows-x86_64.zip', '6ffa4827b519fd0a85b38407049d87ab0c1f045fe2289cb1e6831f965169f8a1'),
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}
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('--output', type=pathlib.Path, default=pathlib.Path('.cache/slang'))
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args = parser.parse_args()
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if platform.machine().lower() not in ('x86_64', 'amd64'):
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raise SystemExit('Pinned Slang packages currently support x86-64 hosts; supply SLANGC_EXECUTABLE for another host.')
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suffix, digest = PACKAGES[platform.system()]
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name = f'slang-{VERSION}-{suffix}'
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args.output.mkdir(parents=True, exist_ok=True)
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archive = args.output / name
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if not archive.exists():
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url = f'https://github.com/shader-slang/slang/releases/download/v{VERSION}/{name}'
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temporary = archive.with_suffix('.download')
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urllib.request.urlretrieve(url, temporary)
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temporary.replace(archive)
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actual = hashlib.sha256(archive.read_bytes()).hexdigest()
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if actual != digest:
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raise SystemExit(f'Slang checksum mismatch for {archive}; expected {digest}, received {actual}')
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if suffix.endswith('.zip'):
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with zipfile.ZipFile(archive) as package:
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for item in package.infolist():
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target = (args.output / item.filename).resolve()
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if not target.is_relative_to(args.output.resolve()):
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raise SystemExit('Unsafe archive path')
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package.extractall(args.output)
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else:
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with tarfile.open(archive) as package:
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package.extractall(args.output, filter='data')
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executable = args.output / 'bin' / ('slangc.exe' if platform.system() == 'Windows' else 'slangc')
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if not executable.is_file():
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raise SystemExit(f'Compiler missing from package: {executable}')
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print(executable.resolve())
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if __name__ == '__main__':
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main()
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