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# Copyright (C) 2009 Canonical
#
# 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 gobject
import locale
import logging
import re
import xapian
from softwarecenter import Application
from softwarecenter.utils import *
from softwarecenter.enums import *
from gettext import gettext as _
class StoreDatabase(gobject.GObject):
"""thin abstraction for the xapian database with convenient functions"""
# TRANSLATORS: List of "grey-listed" words sperated with ";"
# Do not translate this list directly. Instead,
# provide a list of words in your language that people are likely
# to include in a search but that should normally be ignored in
# the search.
SEARCH_GREYLIST_STR = _("app;application;package;program;programme;"
"suite;tool")
# signal emited
__gsignals__ = {"reopen" : (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
()),
"open" : (gobject.SIGNAL_RUN_FIRST,
gobject.TYPE_NONE,
(gobject.TYPE_STRING,)),
}
def __init__(self, pathname, cache):
gobject.GObject.__init__(self)
self._db_pathname = pathname
self._aptcache = cache
def open(self, pathname=None):
" open the database "
if pathname:
self._db_pathname = pathname
self.xapiandb = xapian.Database(self._db_pathname)
# add the apt-xapian-database for here (we don't do this
# for now as we do not have a good way to integrate non-apps
# with the UI)
try:
axi = xapian.Database("/var/lib/apt-xapian-index/index")
self.xapiandb.add_database(axi)
except:
logging.exception("failed to add apt-xapian-index")
self.xapian_parser = xapian.QueryParser()
self.xapian_parser.set_database(self.xapiandb)
self.xapian_parser.add_boolean_prefix("pkg", "XP")
self.xapian_parser.add_boolean_prefix("pkg", "AP")
self.xapian_parser.add_prefix("pkg_wildcard", "XP")
self.xapian_parser.add_prefix("pkg_wildcard", "AP")
self.xapian_parser.set_default_op(xapian.Query.OP_AND)
self.emit("open", self._db_pathname)
def reopen(self):
" reopen the database "
self.open()
self.emit("reopen")
@property
def popcon_max(self):
popcon_max = xapian.sortable_unserialise(self.xapiandb.get_metadata("popcon_max_desktop"))
assert popcon_max > 0
return popcon_max
def _comma_expansion(self, search_term):
"""do expansion of "," in a search term, see
https://wiki.ubuntu.com/SoftwareCenter?action=show&redirect=SoftwareStore#Searching%20for%20multiple%20package%20names
"""
# expand "," to APpkgname AND
if "," in search_term:
query = xapian.Query()
for pkgname in search_term.split(","):
# not a pkgname
if not re.match("[0-9a-z\.\-]+", pkgname):
return None
if pkgname:
query = xapian.Query(xapian.Query.OP_OR, query,
xapian.Query("XP"+pkgname))
return query
return None
def get_query_list_from_search_entry(self, search_term, category_query=None):
""" get xapian.Query from a search term string and a limit the
search to the given category
"""
def _add_category_to_query(query):
""" helper that adds the current category to the query"""
if not category_query:
return query
return xapian.Query(xapian.Query.OP_AND,
category_query,
query)
# empty query returns a query that matches nothing (for performance
# reasons)
if search_term == "" and category_query is None:
return xapian.Query()
# we cheat and return a match-all query for single letter searches
if len(search_term) < 2:
return _add_category_to_query(xapian.Query(""))
# filter query by greylist (to avoid overly generic search terms)
orig_search_term = search_term
for item in self.SEARCH_GREYLIST_STR.split(";"):
(search_term, n) = re.subn('\\b%s\\b' % item, '', search_term)
if n:
logging.debug("greylist changed search term: '%s'" % search_term)
# restore query if it was just greylist words
if search_term == '':
logging.debug("grey-list replaced all terms, restoring")
search_term = orig_search_term
# check if we need to do comma expansion instead of a regular
# query
query = self._comma_expansion(search_term)
if query:
return _add_category_to_query(query)
# get a pkg query
pkg_query = xapian.Query()
for term in search_term.split():
pkg_query = xapian.Query(xapian.Query.OP_OR,
xapian.Query("XP"+term),
pkg_query)
pkg_query = _add_category_to_query(pkg_query)
# get a search query
fuzzy_query = self.xapian_parser.parse_query(search_term,
xapian.QueryParser.FLAG_PARTIAL|
xapian.QueryParser.FLAG_BOOLEAN)
fuzzy_query = _add_category_to_query(fuzzy_query)
return [pkg_query,fuzzy_query]
def get_summary(self, doc):
""" get human readable summary of the given document """
summary = doc.get_value(XAPIAN_VALUE_SUMMARY)
channel = doc.get_value(XAPIAN_VALUE_ARCHIVE_CHANNEL)
# if we do not have the summary in the xapian db, get it
# from the apt cache
if not summary and self._aptcache.ready:
pkgname = self.get_pkgname(doc)
if (pkgname in self._aptcache and
self._aptcache[pkgname].candidate):
return self._aptcache[pkgname].candidate.summary
elif channel:
# FIXME: print something if available for our arch
pass
else:
return _("Sorry, '%s' is not available for this type of computer (%s).") % (pkgname, get_current_arch())
return summary
def get_pkgname(self, doc):
""" Return a packagename from a xapian document """
pkgname = doc.get_value(XAPIAN_VALUE_PKGNAME)
# if there is no value it means we use the apt-xapian-index
# that store the pkgname in the data field directly
if not pkgname:
pkgname = doc.get_data()
return pkgname
def get_popcon(self, doc):
""" Return a popcon value from a xapian document """
popcon_raw = doc.get_value(XAPIAN_VALUE_POPCON)
if popcon_raw:
popcon = xapian.sortable_unserialise(popcon_raw)
else:
popcon = 0
return popcon
def get_xapian_document(self, appname, pkgname):
""" Get the machting xapian document for appname, pkgname
If no document is found, raise a IndexError
"""
#logging.debug("get_xapian_document app='%s' pkg='%s'" % (appname,pkgname))
# first search for appname in the app-install-data namespace
for m in self.xapiandb.postlist("AA"+appname):
doc = self.xapiandb.get_document(m.docid)
if doc.get_value(XAPIAN_VALUE_PKGNAME) == pkgname:
return doc
# then look for matching packages from a-x-i
for m in self.xapiandb.postlist("XP"+pkgname):
doc = self.xapiandb.get_document(m.docid)
return doc
# no matching document found
raise IndexError("No app '%s' for '%s' in database" % (appname,pkgname))
def is_appname_duplicated(self, appname):
"""Check if the given appname is stored multiple times in the db
This can happen for generic names like "Terminal"
"""
for (i, m) in enumerate(self.xapiandb.postlist("AA"+appname)):
if i > 0:
return True
return False
def __len__(self):
"""return the doc count of the database"""
return self.xapiandb.get_doccount()
if __name__ == "__main__":
import apt
import sys
db = StoreDatabase("/var/cache/software-center/xapian", apt.Cache())
db.open()
if len(sys.argv) < 2:
search = "apt,apport"
else:
search = sys.argv[1]
query = db.get_query_list_from_search_entry(search)
print query
enquire = xapian.Enquire(db.xapiandb)
enquire.set_query(query)
matches = enquire.get_mset(0, len(db))
for m in matches:
doc = m.document
print doc.get_data()
# test origin
query = xapian.Query("XOL"+"Ubuntu")
enquire = xapian.Enquire(db.xapiandb)
enquire.set_query(query)
matches = enquire.get_mset(0, len(db))
print "Ubuntu origin: ", len(matches)
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