75 lines
1.9 KiB
Python
75 lines
1.9 KiB
Python
#!/usr/bin/env python3
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"""Read and validate the top-level version from a Flutter pubspec."""
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import argparse
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from pathlib import Path
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import re
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import sys
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_TOP_LEVEL_VERSION = re.compile(r"^version:[ \t]*(.*)$")
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_VERSION = re.compile(
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r"(?P<version>"
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r"(?:0|[1-9][0-9]*)\."
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r"(?:0|[1-9][0-9]*)\."
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r"(?:0|[1-9][0-9]*)\+"
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r"(?P<build>[0-9]+)"
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r")"
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)
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def parse_pubspec_version(contents: str) -> tuple[str, str]:
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values = []
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for line in contents.splitlines():
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match = _TOP_LEVEL_VERSION.match(line)
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if match:
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value = re.sub(r"[ \t]+#.*$", "", match.group(1)).strip()
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values.append(value)
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if len(values) != 1:
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raise ValueError(
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f"expected one top-level 'version:' field, found {len(values)}"
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)
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match = _VERSION.fullmatch(values[0])
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if not match:
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raise ValueError(
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"top-level version must use major.minor.patch+numeric-build syntax; "
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f"got {values[0]!r}"
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)
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return match.group("version"), match.group("build")
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def main() -> int:
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parser = argparse.ArgumentParser(
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description="Read and validate the top-level pubspec version."
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)
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parser.add_argument(
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"pubspec",
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nargs="?",
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type=Path,
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default=Path("pubspec.yaml"),
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help="path to pubspec.yaml (default: ./pubspec.yaml)",
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)
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parser.add_argument(
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"--build-number",
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action="store_true",
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help="print only the numeric build metadata",
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)
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args = parser.parse_args()
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try:
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contents = args.pubspec.read_text(encoding="utf-8")
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version, build = parse_pubspec_version(contents)
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except (OSError, UnicodeError, ValueError) as error:
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print(f"Error: {args.pubspec}: {error}", file=sys.stderr)
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return 1
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print(build if args.build_number else version)
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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