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Fri, Nov 15, 18:23

git.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2014 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""Utilities for interaction with Git repositories"""
import errno
from subprocess import check_call as call
from invenio.base.globals import cfg
from os import chdir
from tempfile import mkdtemp
from shutil import rmtree
def git_exists():
'''
Returns True if Git is installed, else False
'''
if cfg['CFG_PATH_GIT']:
return True
else:
return False
def get_which_git():
"""
Gets which Git is being used
:returns: path to Git
"""
return cfg['CFG_PATH_GIT']
def harvest_repo(root_url, archive_path, tag=None, archive_format='tar.gz'):
"""
Archives a specific tag in a specific Git repository.
:param root_url: The URL to the Git repo
- Supported protocols: git, ssh, http[s].
:param archive_path: A temporary path to clone the repo to
- Must end in .git
:param tag: The path to which the .tar.gz will go to
- Must end in the same as format (NOT inside clone_path)
:param format: One of the following: tar.gz / tar / zip
"""
if not git_exists():
raise Exception("Git not found. It probably needs installing.")
clone_path = mkdtemp(dir=cfg['CFG_TMPDIR'])
git = get_which_git()
call([git, 'clone', root_url, clone_path])
chdir(clone_path)
if tag:
call([git, 'archive', '--format=' + archive_format, '-o',
archive_path, tag])
else:
call([git, 'archive', '--format=' + archive_format, '-o',
archive_path, 'HEAD'])
try:
rmtree(clone_path)
except OSError as e:
# Reraise unless ENOENT: No such file or directory
# (ok if directory has already been deleted)
if e.errno != errno.ENOENT:
raise

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