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#!/usr/bin/python
# debtags - Implement package tags support for Debian
#
# Copyright (C) 2003--2006 Enrico Zini <enrico@debian.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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import sys
import re
from debian import debtags
if len(sys.argv) < 2:
print sys.stderr, "Usage: %s tagdb [packagelist]" % (sys.argv[0])
sys.exit(1)
full = debtags.DB()
# Read full database
tag_filter = re.compile(r"^special::.+$|^.+::TODO$")
full.read(open(sys.argv[1], "r"), lambda x: not tag_filter.match(x))
# Read the package list and create the subcollection
input = len(sys.argv) > 2 and open(sys.argv[2],"r") or sys.stdin
pkgs = set()
for pkg in input:
# Tolerate apt-cache search output as well
pkg, none = pkg.rstrip("\n").split(' - ', 1)
pkgs.add(pkg)
sub = full.choose_packages(pkgs)
rel_index = debtags.relevance_index_function(full, sub)
# Get all the tags sorted by increasing relevance
tags = sorted(sub.iter_tags(), lambda a, b: cmp(rel_index(a), rel_index(b)))
## And finally print them
for tag in tags:
print tag
#print tag, sub.card(tag), full.card(tag), float(sub.card(tag)) / float(full.card(tag))
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