oz-cleanup-cache

#!/usr/bin/env python

# Copyright (C) 2011  Chris Lalancette <clalance@redhat.com>

# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation;
# version 2.1 of the License.

# This library 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
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

import sys
import getopt
import os
import ConfigParser
import shutil

def usage():
    print "Usage: oz-cleanup-cache [OPTIONS]"
    print "  -c <config>\tGet config from <config> (default is /etc/oz/oz.cfg)"
    print "  -f\t\tDon't ask any questions and just blindly remove all oz data"
    print "  -h\t\tPrint this help message"
    sys.exit(1)

try:
    opts, args = getopt.gnu_getopt(sys.argv[1:], 'c:fh',
                                   ['config', 'force', 'help'])
except getopt.GetoptError, err:
    print str(err)
    usage()

force = False
config_file = "/etc/oz/oz.cfg"
for o, a in opts:
    if o in ("-c", "--config"):
        config_file = a
    elif o in ("-f", "--force"):
        force = True
    elif o in ("-h", "--help"):
        usage()
    else:
        assert False, "unhandled option"

if os.geteuid() != 0:
    print "%s must be run as root" % (sys.argv[0])
    sys.exit(2)

if len(args) != 0:
    usage()

config = ConfigParser.SafeConfigParser()
if os.access(config_file, os.F_OK):
    config.read(config_file)

# FIXME: we really shouldn't hard-code this here; instead we should share
# this location with oz/Guest.py
data_dir = "/var/lib/oz"
if config is not None and config.has_section('paths') and config.has_option('paths', 'data_dir'):
    data_dir = config.get('paths', 'data_dir')

floppy_cache = os.path.join(data_dir, "floppies")
iso_cache = os.path.join(data_dir, "isos")

if not force:
    while True:
        response = raw_input("Going to remove all content from %s and %s; continue? (y/N) " % (floppy_cache, iso_cache))
        if len(response) == 0 or response.lower() == 'n':
            sys.exit(0)
        elif response.lower() == 'y':
            break
        else:
            print "Please enter 'y' or 'n'"

print "Removing all cached content from %s and %s" % (floppy_cache, iso_cache)

if os.access(floppy_cache, os.F_OK):
    shutil.rmtree(floppy_cache)
if os.access(iso_cache, os.F_OK):
    shutil.rmtree(iso_cache)