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#!/usr/bin/python -Su
#
# Copyright (C) 2008 Julian Andres Klode <jak@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 3 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, see <http://www.gnu.org/licenses/>.
#
'''Create the databases (or cache) for command-not-found
This program creates the databases in /var/cache/command-not-found/. It may
take some time, because the files it reads are big.
Patches are accepted, aswell as rewrites in Perl.'''
import subprocess
import os.path
import gzip
import sys
import gdbm
databases = {}
def write_db_core(text):
'''Create the database from the Contents-*.gz file
Write the information found in the fileobject 'text' to the database at
the path 'tgt'.
'''
for i in text:
if not (i.startswith('usr/sbin') or i.startswith('usr/bin') or
i.startswith('bin') or i.startswith('sbin')):
continue
try:
fname, packages = i.split(None, 1)
except ValueError:
continue
fname = os.path.basename(fname)
for package in packages.split(','):
try:
section, package = package.strip().rsplit('/', 1)
except ValueError:
package = package.strip()
section = "unknown"
if len(section.split('/')) == 2:
component, section = section.split('/')
else:
component = 'main'
if not component in databases:
databases[component] = gdbm.open(
"/var/cache/command-not-found/%s.db" % component, "n", 0644)
databases[component][':component:'] = component
try:
databases[component][fname] += '|' + package.strip()
except KeyError:
databases[component][fname] = package.strip()
break
def write_db_apt_file():
import glob
for fname in glob.glob('/var/lib/apt/lists/*Contents*.*'):
if "Contents-source" in fname:
continue
if fname.endswith(".diff_Index"):
continue
print 'I: Writing data for %s ...' % os.path.basename(fname),
proc = subprocess.Popen(["/usr/lib/apt/apt-helper", "cat-file", fname], stdout=subprocess.PIPE)
try:
write_db_core(proc.stdout)
finally:
proc.stdout.close()
proc.wait()
print '. done'
if __name__ == '__main__':
from optparse import OptionParser
parser = OptionParser()
parser.add_option("-u", "--no-umask", action="store_true",
help="Do not change the umask to 0022.")
(options, args) = parser.parse_args()
try:
if not options.no_umask:
umask = os.umask(0022)
write_db_apt_file()
finally:
for component, fobj in databases.iteritems():
fobj.close()
if not options.no_umask:
os.umask(umask)
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