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#!/usr/bin/python -tt
#
# Create a virtual machine from an XML image description
#
# Copyright 2007  Red Hat, Inc.
# David Lutterkort <dlutter@redhat.com>
#
# 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., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.

import sys
import urlgrabber.progress as progress

import virtinst
import virtinst.ImageParser
import virtinst.CapabilitiesParser
import virtinst.cli as cli
from virtinst.cli import fail, print_stdout, print_stderr

import optparse
from optparse import OptionGroup

cli.setupGettext()

### General input gathering functions

def get_networks(domain, guest, options):
    nnics = domain.interface
    networks, macs = cli.digest_networks(guest, options, numnics=nnics)

    if nnics > len(networks):
        fail(_("The image requires %i network interface.") % nnics)

    cli.get_networks(guest, networks, macs)

def get_graphics(image, guest, options):
    graphics = cli.digest_graphics(guest, options,
                                   default_override=bool(image.graphics))
    cli.get_graphics(guest, graphics)

### Option parsing
def parse_args():
    usage = "%prog [options] image.xml"
    parser = cli.setupParser(usage)
    cli.add_connect_option(parser)

    geng = OptionGroup(parser, _("General Options"))
    geng.add_option("-n", "--name", dest="name",
                    help=_("Name of the guest instance"))
    geng.add_option("-r", "--ram", type="int", dest="memory",
                    help=_("Memory to allocate for guest instance in "
                           "megabytes"))
    geng.add_option("-u", "--uuid", dest="uuid",
                    help=_("UUID for the guest."))
    cli.vcpu_cli_options(geng)
    geng.add_option("", "--os-type", dest="distro_type",
                    help=_("The OS type being installed, e.g. "
                           "'linux', 'unix', 'windows'"))
    geng.add_option("", "--os-variant", dest="distro_variant",
                      help=_("The OS variant being installed, "
                             "e.g. 'fedora6', 'rhel5', 'solaris10', 'win2k'"))
    parser.add_option_group(geng)

    fulg = OptionGroup(parser, _("Full Virtualization specific options"))
    fulg.add_option("", "--noapic", action="store_true", dest="noapic",
                    default=False,
                    help=_("Disables APIC for fully virtualized guest"))
    fulg.add_option("", "--noacpi", action="store_true", dest="noacpi",
                    default=False,
                    help=_("Disables ACPI for fully virtualized guest"))
    parser.add_option_group(fulg)

    netg = cli.network_option_group(parser)
    parser.add_option_group(netg)

    vncg = cli.graphics_option_group(parser)
    parser.add_option_group(vncg)

    misc = OptionGroup(parser, _("Miscellaneous Options"))
    misc.add_option("-p", "--print", action="store_true", dest="print_only",
                    help=_("Print the libvirt XML, but do not start the "
                           "domain"))
    misc.add_option("", "--boot", type="int", dest="boot",
                    help=_("The zero-based index of the boot record to use"))
    misc.add_option("", "--replace", action="store_true", dest="replace",
                    default=False,
                    help=_("Overwrite, or destroy, an existing image with "
                           "the same name"))
    misc.add_option("", "--noreboot", action="store_true", dest="noreboot",
                    help=_("Don't boot guest after completing install."))
    misc.add_option("", "--skip-checksum", action="store_true",
                    dest="skipchecksum",
                    help=_("Skip disk checksum verification process"))
    misc.add_option("-d", "--debug", action="store_true", dest="debug",
                    help=_("Print debugging information"))
    misc.add_option("", "--prompt", action="store_true", dest="prompt",
                    default=False,
                    help=optparse.SUPPRESS_HELP)
    misc.add_option("", "--force", action="store_true", dest="force",
                    default=False,
                    #help=_("Do not prompt for input. Answers yes where "
                    #       "applicable, terminates for all other prompts"),
                    help=optparse.SUPPRESS_HELP)
    misc.add_option("-q", "--quiet", action="store_true", dest="quiet",
                    help=_("Suppress non-error output"))
    parser.add_option_group(misc)

    (options, args) = parser.parse_args()

    if len(args) < 1:
        parser.error(_("You need to provide an image XML descriptor"))
    options.image = args[0]

    return options

def main():
    cli.earlyLogging()
    options = parse_args()

    options.quiet = options.print_only or options.quiet
    cli.setupLogging("virt-image", options.debug, options.quiet)
    cli.set_prompt(False)

    conn = cli.getConnection(options.connect)

    try:
        image = virtinst.ImageParser.parse_file(options.image)
    except virtinst.ImageParser.ParserException, msg:
        fail( "%s '%s': %s" % (_("Cannot parse"),  options.image, msg))

    if options.boot is not None:
        nboots = len(image.domain.boots)
        if options.boot < 0 or options.boot >= nboots:
            fail(_("The index for --boot must be between 0 and %d") %
                 (nboots - 1))


    # Build the Installer instance
    installer = virtinst.ImageInstaller(boot_index=options.boot,
                                        image=image,
                                        conn=conn)


    # Get Guest instance from installer parameters.
    guest = installer.guest_from_installer()


    # now let's get some of the common questions out of the way
    guest.replace = options.replace
    cli.get_name(options.name, guest, image.name)
    cli.get_memory(options.memory, guest, image.domain.memory)
    cli.get_uuid(options.uuid, guest)
    cli.get_vcpus(guest, options.vcpus, options.check_cpu, image.domain.vcpu)
    cli.get_cpuset(guest, options.cpuset)
    cli.parse_cpu(guest, options.cpu)
    get_networks(image.domain, guest, options)

    get_graphics(image.domain, guest, options)
    cli.get_video(guest)

    cli.set_os_variant(guest, options.distro_type, options.distro_variant)

    if installer.is_hvm():
        if options.noacpi:
            guest.features["acpi"] = False
        if options.noapic:
            guest.features["apic"] = False


    # we've got everything -- try to start the install
    if options.print_only:
        start_xml, final_xml = guest.start_install(return_xml=True)
        print_stdout(start_xml or final_xml, do_force=True)
        return

    meter = progress.TextMeter(fo=sys.stdout)

    if not options.skipchecksum:
        for disk in image.storage.values():
            disk.check_disk_signature(meter=meter)

    try:
        print_stdout("\n")
        print_stdout(_("Creating guest %s...") % guest.name)

        guest.start_install(None, meter, noboot=options.noreboot)
    except RuntimeError:
        raise
    except Exception, e:
        fail(e, do_exit=False)
        cli.install_fail(guest)

if __name__ == "__main__":
    try:
        main()
    except SystemExit, sys_e:
        sys.exit(sys_e.code)
    except KeyboardInterrupt:
        print_stderr(_("Installation aborted at user request"))
    except Exception, main_e:
        fail(main_e)