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utils.py
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# Copyright (C) 2017 The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information
"""Utilities helper functions"""
import datetime
import os
import shutil
import tempfile
from swh.core import tarball
def init_git_repo_from_archive(project_name, archive_path,
root_temp_dir='/tmp'):
"""Given a path to an archive containing a git repository.
Uncompress that archive to a temporary location and returns the path.
If any problem whatsoever is raised, clean up the temporary location.
Args:
project_name (str): Project's name
archive_path (str): Full path to the archive
root_temp_dir (str): Optional temporary directory mount point
(default to /tmp)
Returns
A tuple:
- temporary folder: containing the mounted repository
- repo_path, path to the mounted repository inside the temporary folder
Raises
ValueError in case of failure to run the command to uncompress
"""
temp_dir = tempfile.mkdtemp(
suffix='.swh.loader.git', prefix='tmp.', dir=root_temp_dir)
try:
# create the repository that will be loaded with the dump
tarball.uncompress(archive_path, temp_dir)
repo_path = os.path.join(temp_dir, project_name)
# tarball content may not be as expected (e.g. no top level directory
# or a top level directory with a name different from project_name),
# so try to make it loadable anyway
if not os.path.exists(repo_path):
os.mkdir(repo_path)
for root, dirs, files in os.walk(temp_dir):
if '.git' in dirs:
shutil.copytree(os.path.join(root, '.git'),
os.path.join(repo_path, '.git'))
break
return temp_dir, repo_path
except Exception as e:
shutil.rmtree(temp_dir)
raise e
def check_date_time(timestamp):
"""Check date time for overflow errors.
Args:
timestamp (timestamp): Timestamp in seconds
Raise:
Any error raised by datetime fromtimestamp conversion error.
"""
if not timestamp:
return None
datetime.datetime.fromtimestamp(timestamp,
datetime.timezone.utc)

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