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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 2016 OpenMarket Ltd
#
# 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
logger = logging.getLogger(__name__)
def get_version_string(module):
"""Given a module calculate a git-aware version string for it.
If called on a module not in a git checkout will return `__verison__`.
Args:
module (module)
Returns:
str
"""
cached_version = getattr(module, "_synapse_version_string_cache", None)
if cached_version:
return cached_version
version_string = module.__version__
try:
null = open(os.devnull, "w")
cwd = os.path.dirname(os.path.abspath(module.__file__))
try:
git_branch = (
subprocess.check_output(
["git", "rev-parse", "--abbrev-ref", "HEAD"], stderr=null, cwd=cwd
)
.strip()
.decode("ascii")
)
git_branch = "b=" + git_branch
except (subprocess.CalledProcessError, FileNotFoundError):
# FileNotFoundError can arise when git is not installed
git_branch = ""
try:
git_tag = (
subprocess.check_output(
["git", "describe", "--exact-match"], stderr=null, cwd=cwd
)
.strip()
.decode("ascii")
)
git_tag = "t=" + git_tag
except (subprocess.CalledProcessError, FileNotFoundError):
git_tag = ""
try:
git_commit = (
subprocess.check_output(
["git", "rev-parse", "--short", "HEAD"], stderr=null, cwd=cwd
)
.strip()
.decode("ascii")
)
except (subprocess.CalledProcessError, FileNotFoundError):
git_commit = ""
try:
dirty_string = "-this_is_a_dirty_checkout"
is_dirty = (
subprocess.check_output(
["git", "describe", "--dirty=" + dirty_string], stderr=null, cwd=cwd
)
.strip()
.decode("ascii")
.endswith(dirty_string)
)
git_dirty = "dirty" if is_dirty else ""
except (subprocess.CalledProcessError, FileNotFoundError):
git_dirty = ""
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 = "%s (%s)" % (module.__version__, git_version)
except Exception as e:
logger.info("Failed to check for git repository: %s", e)
module._synapse_version_string_cache = version_string
return version_string
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