ci: Fix compatibility with packaging==22

# See the License for the specific language governing permissions and

# limitations under the License.

from packaging.version import parse, LegacyVersion

from packaging.version import parse, InvalidVersion

import argparse

import sys

try:

    from packaging.version import LegacyVersion

except ImportError:

    LegacyVersion = ()  # trick isinstance!

# exit with 0 if --new is equal to --old

# exit with 1 on errors

# exit with 2 if --new is newer than --old

    parser.print_help()

    exit(1)

old, new = parse(args.old), parse(args.new)

# packaging>=22 only supports PEP-440 version numbers, and a non-valid version

# will throw InvalidVersion. Previous packaging releases would create a

# LegacyVersion object if the given version string failed to parse as PEP-440,

# and since we use versions closer to semver, we want to fail in that case.

versions = []

for version in [args.old, args.new]:

    try:

        versions.append(parse(version))

    except InvalidVersion:

        print("Invalid version parsed: {}".format(version))

        sys.exit(1)

# only accept versions that were correctly parsed

old, new = versions[0], versions[1]

for version in [old, new]:

    if isinstance(version, LegacyVersion):

        print("Invalid version parsed: {}".format(version))