Synnefo » snf-image-creator

#!/usr/bin/env python

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from image_creator import get_os_class

from image_creator import __version__ as version

from image_creator import FatalError

from image_creator.disk import Disk

from image_creator.util import get_command, error, progress_generator, success

from clint.textui import puts

import sys

import os

import optparse

dd = get_command('dd')

def check_writable_dir(option, opt_str, value, parser):

    dirname = os.path.dirname(value)

    name = os.path.basename(value)

    if dirname and not os.path.isdir(dirname):

        parser.error("`%s' is not an existing directory" % dirname)

    if not name:

        parser.error("`%s' is not a valid file name" % dirname)

    setattr(parser.values, option.dest, value)

def parse_options(input_args):

    usage = "Usage: %prog [options] <input_media>"

    parser = optparse.OptionParser(version=version, usage=usage)

    parser.add_option("-f", "--force", dest="force", default=False,

        action="store_true", help="overwrite output files if they exist")

    parser.add_option("--no-cleanup", dest="cleanup", default=True,

        help="don't cleanup sensitive data",

        action="store_false")

    parser.add_option("--no-sysprep", dest="sysprep", default=True,

        help="don't perform system preperation",

        action="store_false")

    parser.add_option("--no-shrink", dest="shrink", default=True,

        help="don't shrink any partition",

        action="store_false")

    parser.add_option("-o", "--outfile", type="string", dest="outfile",

        default=None, action="callback", callback=check_writable_dir,

        help="dump image to FILE",

        metavar="FILE")

    parser.add_option("-u", "--upload", dest="upload", default=False,

        help="upload the image to pithos",

        action="store_true")

    parser.add_option("-r", "--register", dest="register", default=False,

        help="register the image to ~okeanos", action="store_true")

    options, args = parser.parse_args(input_args)

    if len(args) != 1:

        parser.error('Wrong number of arguments')

    options.source = args[0]

    if not os.path.exists(options.source):

        parser.error('input media is not accessible')

    if options.register:

        options.upload = True

    if options.outfile is None and not options.upload:

        parser.error('either outfile (-o) or upload (-u) must be set.')

    return options

def image_creator():

    puts('snf-image-creator %s\n' % version)

    options = parse_options(sys.argv[1:])

    if os.geteuid() != 0:

        raise FatalError("You must run %s as root" \

                        % os.path.basename(sys.argv[0]))

    if not options.force and options.outfile is not None:

        for extension in ('', '.meta'):

            filename = "%s%s" % (options.outfile, extension)

            if os.path.exists(filename):

                raise FatalError("Output file %s exists "

                    "(use --force to overwrite it)." % filename)

    disk = Disk(options.source)

    try:

        dev = disk.get_device()

        dev.mount()

        osclass = get_os_class(dev.distro, dev.ostype)

        image_os = osclass(dev.root, dev.g)

        metadata = image_os.get_metadata()

        puts()

        if options.sysprep:

            image_os.sysprep()

        if options.cleanup:

            image_os.data_cleanup()

        dev.umount()

        size = options.shrink and dev.shrink() or dev.size()

        metadata['size'] = str(size // 2 ** 20)

        if options.outfile is not None:

            f = open('%s.%s' % (options.outfile, 'meta'), 'w')

            try:

                for key in metadata.keys():

                    f.write("%s=%s\n" % (key, metadata[key]))

            finally:

                f.close()

            dev.dump(options.outfile)

    finally:

        puts('cleaning up...')

        disk.cleanup()

    return 0

def main():

    try:

        ret = image_creator()

        sys.exit(ret)

    except FatalError as e:

        error(e)

        sys.exit(1)

if __name__ == '__main__':

    main()

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