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# vim: set fileencoding=utf-8 :
#
# (C) 2013 Guido Günther <agx@sigxcpu.org>
# This program 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.
#
# This program 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 this program; if not, please see
# <http://www.gnu.org/licenses/>
"""Make blobs in a git repository accessible as file like objects"""
import io
from gbp.git.repository import GitRepositoryError
class GitVfs(object):
class _File(object):
"""
A file like object representing a file in git
@todo: We don't support any byte ranges yet.
"""
def __init__(self, content, binary=False):
self._iter = iter
if binary:
self._data = io.BytesIO(content)
else:
self._data = io.StringIO(content.decode())
def readline(self):
return self._data.readline()
def readlines(self):
return self._data.readlines()
def read(self, size=None):
return self._data.read(size)
def close(self):
return self._data.close()
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.close()
def __init__(self, repo, committish=None):
"""
@param repo: the git repository to act on
@param committish: the committish to act on
"""
self._repo = repo
self._committish = committish or 'HEAD'
def open(self, path, flags=None):
flags = flags or 'r'
for flag in flags:
if flag not in ['r', 't', 'b']:
raise NotImplementedError("Flag '%s' unsupported so far" % flag)
try:
return GitVfs._File(self._repo.show(
"%s:%s" % (self._committish, path)),
True if 'b' in flags else False)
except GitRepositoryError as e:
raise OSError(e)
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