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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/>
"""provides some debian source package related helpers"""
import os
from gbp.deb.format import DebianSourceFormat
from gbp.deb.changelog import ChangeLog
import six
class FileVfs(object):
def __init__(self, dir):
"""
Access files in a unpaced Debian source package.
@param dir: the toplevel of the source tree
@type dir: C{str}
"""
self._dir = dir
def open(self, path, flags=None):
flags = flags or 'r'
return open(os.path.join(self._dir, path), flags)
class DebianSourceError(Exception):
pass
class DebianSource(object):
"""
A debianized source tree
Querying/setting information in a debianized source tree
involves several files. This class provides a common interface.
"""
def __init__(self, vfs):
"""
@param vfs: a class that implemented GbpVFS interfacce or
a directory (which will used the DirGbpVFS class.
"""
self._changelog = None
if isinstance(vfs, six.string_types):
self._vfs = FileVfs(vfs)
else:
self._vfs = vfs
def is_native(self):
"""
Whether this is a native Debian package
"""
try:
ff = self._vfs.open('debian/source/format')
f = DebianSourceFormat(ff.read())
if f.type:
return f.type == 'native'
except IOError as e:
pass # Fall back to changelog parsing
try:
return not '-' in self.changelog.version
except IOError as e:
raise DebianSourceError("Failed to determine source format: %s" % e)
@property
def changelog(self):
"""
Return the L{gbp.deb.ChangeLog}
"""
if not self._changelog:
try:
clf = self._vfs.open('debian/changelog')
self._changelog = ChangeLog(clf.read())
except IOError as err:
raise DebianSourceError('Failed to read changelog: %s' % err)
return self._changelog
@property
def sourcepkg(self):
"""
The source package's name
"""
return self.changelog['Source']
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