/usr/share/software-center/softwarecenter/db/debfile.py is in software-center 13.10-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Authors:
# Michael Vogt
#
# 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; version 3.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
import os
from apt.debfile import DebPackage
from gettext import gettext as _
from mimetypes import guess_type
from softwarecenter.db.application import Application, AppDetails
from softwarecenter.enums import PkgStates
from softwarecenter.utils import ExecutionTime, utf8
DEB_MIME_TYPE = 'application/x-debian-package'
def is_deb_file(debfile):
mtype = guess_type(debfile)
return mtype is not None and DEB_MIME_TYPE in mtype
class DebFileOpenError(Exception):
""" Raised if a DebFile fails to open """
def __init__(self, msg, path):
super(DebFileOpenError, self).__init__(msg)
self.path = path
class DebFileApplication(Application):
def __init__(self, debfile):
if not is_deb_file(debfile):
raise DebFileOpenError("Could not open %r." % debfile, debfile)
# work out debname/appname
debname = os.path.splitext(os.path.basename(debfile))[0]
pkgname = debname.split('_')[0].lower()
# call the constructor
Application.__init__(self, pkgname=pkgname, request=debfile)
def get_details(self, db):
with ExecutionTime("get_details for DebFileApplication"):
details = AppDetailsDebFile(db, application=self)
return details
class AppDetailsDebFile(AppDetails):
def __init__(self, db, doc=None, application=None):
super(AppDetailsDebFile, self).__init__(db, doc, application)
if doc:
raise DebFileOpenError("AppDetailsDebFile: doc must be None.")
self._error = None
self._deb = None
# check errors before creating the DebPackage
if not os.path.exists(self._app.request):
self._error = _("Not found")
self._error_not_found = utf8(_(u"The file \u201c%s\u201d "
"does not exist.")) % utf8(self._app.request)
elif not is_deb_file(self._app.request):
self._error = _("Not found")
self._error_not_found = utf8(_(u"The file \u201c%s\u201d "
"is not a software package.")) % utf8(self._app.request)
if self._error is not None:
return
try:
with ExecutionTime("create DebPackage"):
# Cache() used to be faster here than self._cache._cache
# but that is no longer the case with the latest apt
self._deb = DebPackage(self._app.request, self._cache._cache)
except:
# deb files which are corrupt
self._error = _("Internal Error")
self._error_not_found = utf8(_(u"The file \u201c%s\u201d "
"could not be opened.")) % utf8(self._app.request)
return
if self.pkgname and self.pkgname != self._app.pkgname:
# this happens when the deb file has a quirky file name
self._app.pkgname = self.pkgname
# load pkg cache
self._pkg = None
if (self._app.pkgname in self._cache and
self._cache[self._app.pkgname].candidate):
self._pkg = self._cache[self._app.pkgname]
# load xapian document
self._doc = None
try:
self._doc = self._db.get_xapian_document(
self._app.appname, self._app.pkgname)
except:
pass
# check deb and set failure state on error
with ExecutionTime("AppDetailsDebFile._deb.check()"):
if not self._deb.check():
self._error = self._deb._failure_string.strip()
@property
def description(self):
if self._deb:
description = self._deb._sections.get("Description", "")
s = ('\n').join(description.split('\n')[1:]).replace(" .\n", "")
return utf8(s)
return ""
@property
def maintenance_status(self):
pass
@property
def pkgname(self):
if self._deb:
return self._deb._sections["Package"]
@property
def pkg_state(self):
if self._error:
if self._error_not_found:
return PkgStates.NOT_FOUND
else:
return PkgStates.ERROR
if self._deb:
deb_state = self._deb.compare_to_version_in_cache()
if deb_state == DebPackage.VERSION_NONE:
return PkgStates.UNINSTALLED
elif deb_state == DebPackage.VERSION_OUTDATED:
if self._cache[self.pkgname].installed:
return PkgStates.INSTALLED
else:
return PkgStates.UNINSTALLED
elif deb_state == DebPackage.VERSION_SAME:
return PkgStates.REINSTALLABLE
elif deb_state == DebPackage.VERSION_NEWER:
if self._cache[self.pkgname].installed:
return PkgStates.UPGRADABLE
else:
return PkgStates.UNINSTALLED
@property
def summary(self):
if self._deb:
description = self._deb._sections.get("Description", "")
# ensure its utf8(), see #738771
return utf8(description.split('\n')[0])
@property
def display_summary(self):
if self._doc:
name = self._db.get_appname(self._doc)
if name:
return self.summary
else:
# by spec..
return self._db.get_pkgname(self._doc)
return self.summary
@property
def version(self):
if self._deb:
return self._deb._sections["Version"]
@property
def installed_size(self):
installed_size = 0
if self._deb:
try:
installed_size = long(self._deb._sections["Installed-Size"])
except:
pass
return installed_size * 1024
@property
def warning(self):
# FIXME: use more concise warnings
if self._deb:
deb_state = self._deb.compare_to_version_in_cache(
use_installed=False)
if deb_state == DebPackage.VERSION_NONE:
return utf8(
_("Only install this file if you trust the origin."))
elif (not self._cache[self.pkgname].installed and
self._cache[self.pkgname].candidate and
self._cache[self.pkgname].candidate.downloadable):
if deb_state == DebPackage.VERSION_OUTDATED:
return utf8(_("Please install \"%s\" via your normal "
"software channels. Only install this file if you "
"trust the origin.")) % utf8(self.name)
elif deb_state == DebPackage.VERSION_SAME:
return utf8(_("Please install \"%s\" via your normal "
"software channels. Only install this file if you "
"trust the origin.")) % utf8(self.name)
elif deb_state == DebPackage.VERSION_NEWER:
return utf8(_("An older version of \"%s\" is available in "
"your normal software channels. Only install this "
"file if you trust the origin.")) % utf8(self.name)
@property
def website(self):
if self._deb:
website = None
try:
website = self._deb._sections["Homepage"]
except:
pass
if website:
return website
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