def _extract_deb(cls, deb_path: pathlib.Path, extract_dir: str) -> None:
"""Extract deb and return `<package-name>=<version>`."""
try:
subprocess.check_call(
["dpkg-deb", "--extract", deb_path, extract_dir])
except subprocess.CalledProcessError:
raise errors.UnpackError(deb_path)
def _extract_deb_name_version(cls, deb_path: pathlib.Path) -> str:
try:
output = subprocess.check_output(
["dpkg-deb", "--show", "--showformat=${Package}=${Version}", deb_path]
)
except subprocess.CalledProcessError:
raise errors.UnpackError(deb_path)
return output.decode().strip()