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# Copyright 2016 OpenMarket Ltd
# Copyright 2021 The Matrix.org Foundation C.I.C.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import os
import subprocess
from types import ModuleType
from typing import Dict
logger = logging.getLogger(__name__)
version_cache: Dict[ModuleType, str] = {}
def get_version_string(module: ModuleType) -> str:
"""Given a module calculate a git-aware version string for it.
If called on a module not in a git checkout will return `__version__`.
Args:
module: The module to check the version of. Must declare a __version__
attribute.
Returns:
The module version (as a string).
"""
cached_version = version_cache.get(module)
if cached_version is not None:
return cached_version
# We want this to fail loudly with an AttributeError. Type-ignore this so
# mypy only considers the happy path.
version_string = module.__version__ # type: ignore[attr-defined]
try:
cwd = os.path.dirname(os.path.abspath(module.__file__))
def _run_git_command(prefix: str, *params: str) -> str:
try:
result = (
subprocess.check_output(
["git", *params], stderr=subprocess.DEVNULL, cwd=cwd
)
.strip()
.decode("ascii")
)
return prefix + result
except (subprocess.CalledProcessError, FileNotFoundError):
return ""
git_branch = _run_git_command("b=", "rev-parse", "--abbrev-ref", "HEAD")
git_tag = _run_git_command("t=", "describe", "--exact-match")
git_commit = _run_git_command("", "rev-parse", "--short", "HEAD")
dirty_string = "-this_is_a_dirty_checkout"
is_dirty = _run_git_command("", "describe", "--dirty=" + dirty_string).endswith(
dirty_string
)
git_dirty = "dirty" if is_dirty else ""
if git_branch or git_tag or git_commit or git_dirty:
git_version = ",".join(
s for s in (git_branch, git_tag, git_commit, git_dirty) if s
)
version_string = f"{version_string} ({git_version})"
except Exception as e:
logger.info("Failed to check for git repository: %s", e)
version_cache[module] = version_string
return version_string
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