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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
import os
from pathlib import Path
from packaging.version import Version
def mozilla_build_version():
mozilla_build = os.environ.get("MOZILLABUILD")
version_file = Path(mozilla_build) / "VERSION"
assert version_file.exists(), (
f'The MozillaBuild VERSION file was not found at "{version_file}".\n'
"Please check if MozillaBuild is installed correctly and that the"
"`MOZILLABUILD` environment variable is to the correct path."
)
with version_file.open() as file:
return Version(file.readline().rstrip("\n"))