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svn.py
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Fri, Nov 15, 19:58

svn.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 SVN repositories"""
import errno
from os import chdir
from subprocess import check_call as call
from invenio.base.globals import cfg
import tarfile
from tempfile import mkdtemp
from shutil import rmtree
def svn_exists():
"""
Returns True if SVN is installed, else False
"""
if cfg['CFG_PATH_SVN']:
return True
else:
return False
def get_which_svn():
"""
Gets which SVN is being used
:returns: path to SVN
"""
return cfg['CFG_PATH_SVN']
def harvest_repo(root_url, archive_path, tag=None, archive_mode='w:gz'):
"""
Archives a specific tag in a specific SVN repository.
:param root_url: This is the root url of the repo and should end in the
repo name.
:param archive_path: Where the archive will be stored - Must end in a
valid extension that matches the archive_mode type. Default requires
'tar.gz'
:param tag: This is the tag you want to harvest, None=HEAD
:param archive_mode: See 'tarfile.open' modes default w:gz > tar.gz
"""
if not svn_exists():
raise Exception("SVN not found. It probably needs installing.")
clone_path = mkdtemp(dir=cfg['CFG_TMPDIR'])
svn = get_which_svn()
if tag:
call([svn, 'co', root_url + '/tags/' + tag, clone_path])
else:
call([svn, 'co', root_url + '/trunk/', clone_path])
chdir(cfg['CFG_TMPDIR'])
tar = tarfile.open(name=archive_path, mode=archive_mode)
tar.add(clone_path, arcname=root_url.split('/').pop())
tar.close()
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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