[molecule] implement ISO to TAR handler
This commit is contained in:
Fabio Erculiani
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# Sabayon Linux 5 x86 GNOME Molecule ISO to compressed tar
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# The aim of this spec file is make easily scriptable the creation of tar.*
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# files generated off a Sabayon Linux ISO Live system environment.
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# This, for example, enables users to easily create OpenVZ templates of any
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# existing Sabayon Linux ISO image.
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# squashfs needed
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# Define an alternative execution strategy, in this case, the value must be
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# "iso_to_tar"
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execution_strategy: iso_to_tar
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# pre chroot command, example, for 32bit chroots on 64bit system, you always
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# have to append "linux32" this is useful for inner_chroot_script
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prechroot: linux32
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# Path to source ISO file (MANDATORY)
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source_iso: /sabayon/iso_images/Sabayon_5.0_G.iso
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# Outer chroot script command, to be executed outside destination chroot before
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# before entering it (and before inner_chroot_script)
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# outer_chroot_script: /path/to/script/to/be/executed/outside
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# Inner chroot script command, to be executed inside destination chroot before packing it
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# - kmerge.sh - setup kernel bins
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# inner_chroot_script: /sabayon/scripts/inner_chroot_script.sh
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# Outer chroot script command, to be executed outside destination chroot before
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# before entering it (and AFTER inner_chroot_script)
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# outer_chroot_script_after: /path/to/script/to/be/executed/outside/after
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# Pre-ISO building script. Hook to be able to copy kernel images in place, for example
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# pre_iso_script: /sabayon/scripts/cdroot.py
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# Destination directory for the ISO image path (MANDATORY)
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destination_tar_directory: /home/fabio
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# Compression method (default is: gz). Supported compression methods: gz, bz2
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# compression_method: gz
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# Specify an alternative tar file name (tar file name will be automatically
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# produced otherwise)
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# tar_name:
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# Alternative ISO file mount command (default is: mount -o loop -t iso9660)
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# iso_mounter:
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# Alternative ISO umounter command (default is: umount)
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# iso_umounter:
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# Alternative squashfs file mount command (default is: mount -o loop -t squashfs)
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# squash_mounter:
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# Alternative ISO squashfs umount command (default is: umount)
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# squash_umounter:
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# Merge directory with destination LiveCD root (before tarring everything up)
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# merge_livecd_root: /put/more/files/onto/CD/root
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# List of packages that would be removed from chrooted system (comma separated)
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# packages_to_remove:
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# Custom shell call to packages removal (default is: equo remove)
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# custom_packages_remove_cmd:
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# List of packages that would be added from chrooted system (comma separated)
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# packages_to_add:
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# Custom shell call to packages add (default is: equo install)
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# custom_packages_add_cmd:
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# Custom command for updating repositories (default is: equo update)
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# repositories_update_cmd:
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# Determine whether repositories update should be run (if packages_to_add is set)
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# (default is: no), values are: yes, no.
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# execute_repositories_update: no
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# Directories to remove completely (comma separated)
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# paths_to_remove:
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# Directories to empty (comma separated)
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# paths_to_empty:
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@@ -18,7 +18,8 @@
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from molecule.specs.plugins.builtin import LivecdSpec
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from molecule.specs.plugins.remaster import RemasterSpec
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from molecule.specs.plugins.tar import IsoToTarSpec
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# FIXME: this will need to be pluggable (and plugin factory is required)
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SPEC_PLUGS = dict((x.execution_strategy(), x,) for x in \
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(LivecdSpec, RemasterSpec))
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(LivecdSpec, RemasterSpec, IsoToTarSpec))
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@@ -0,0 +1,211 @@
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# -*- coding: utf-8 -*-
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# Molecule Disc Image builder for Sabayon Linux
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# Copyright (C) 2009 Fabio Erculiani
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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import os
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import tempfile
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import shutil
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from molecule.i18n import _
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from molecule.output import blue, darkred
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from molecule.specs.skel import GenericExecutionStep, GenericSpec
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from molecule.specs.plugins.remaster import IsoUnpackHandler, \
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ChrootHandler
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import molecule.utils
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SUPPORTED_COMPRESSION_METHODS = ["bz2", "gz"]
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class TarHandler(GenericExecutionStep):
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_TAR_EXEC = "/bin/tar"
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_TAR_COMP_METHODS = {
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"gz": "z",
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"bz2": "j",
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}
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def __init__(self, *args, **kwargs):
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GenericExecutionStep.__init__(self, *args, **kwargs)
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def _get_tar_comp_method(self):
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comp_method = self.metadata.get('compression_method', "gz")
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return TarHandler._TAR_COMP_METHODS[comp_method]
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def setup(self):
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# setup compression method, default is gz
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self.dest_path = os.path.join(
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self.metadata['destination_tar_directory'],
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os.path.basename(self.metadata['source_iso']) + ".tar." + \
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self.metadata.get('compression_method', "gz"))
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self.chroot_path = self.metadata['chroot_unpack_path']
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def pre_run(self):
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self.Output.updateProgress("[%s|%s] %s" % (
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blue("TarHandler"),darkred(self.spec_name),
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_("executing pre_run"),
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)
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)
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def run(self):
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self.Output.updateProgress("[%s|%s] %s => %s" % (
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blue("TarHandler"),darkred(self.spec_name),
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_("compressing chroot"),
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self.chroot_path,
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)
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)
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dest_path_dir = os.path.dirname(self.dest_path)
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if not os.path.isdir(dest_path_dir) and not \
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os.path.lexists(dest_path_dir):
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os.makedirs(dest_path_dir, 0755)
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current_dir = os.getcwd()
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# change dir to chroot dir
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os.chdir(self.chroot_path)
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args = (TarHandler._TAR_EXEC, "cfp" + self._get_tar_comp_method(),
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self.dest_path, ".", "--atime-preserve", "--numeric-owner")
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rc = molecule.utils.exec_cmd(args)
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os.chdir(current_dir)
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if rc != 0:
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self.Output.updateProgress("[%s|%s] %s: %s" % (
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blue("TarHandler"), darkred(self.spec_name),
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_("chroot compression failed"), rc,
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)
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)
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return rc
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return 0
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def post_run(self):
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self.Output.updateProgress("[%s|%s] %s" % (
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blue("TarHandler"),darkred(self.spec_name),
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_("executing post_run"),
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)
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)
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def kill(self, success = True):
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if not success:
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try:
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shutil.rmtree(self.metadata['chroot_tmp_dir'], True)
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except (shutil.Error, OSError,):
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pass
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return 0
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class IsoToTarSpec(GenericSpec):
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@staticmethod
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def execution_strategy():
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return "iso_to_tar"
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def supported_compression_method(self, comp_m):
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return comp_m in SUPPORTED_COMPRESSION_METHODS
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def vital_parameters(self):
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return [
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"source_iso",
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"destination_tar_directory",
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]
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def parser_data_path(self):
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return {
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'prechroot': {
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'cb': self.valid_exec_first_list_item,
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've': self.ve_string_splitter,
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},
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'source_iso': {
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'cb': self.valid_path_string,
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've': self.ve_string_stripper,
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},
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'tar_name': {
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'cb': self.ne_string,
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've': self.ve_string_stripper,
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},
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'compression_method': {
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'cb': self.supported_compression_method,
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've': self.ve_string_stripper,
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},
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'outer_chroot_script': {
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'cb': self.valid_exec,
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've': self.ve_string_stripper,
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},
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'inner_chroot_script': {
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'cb': self.valid_path_string,
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've': self.ve_string_stripper,
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},
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'outer_chroot_script_after': {
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'cb': self.valid_path_string,
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've': self.ve_string_stripper,
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},
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'destination_tar_directory': {
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'cb': self.valid_dir,
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've': self.ve_string_stripper,
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},
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'iso_mounter': {
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'cb': self.ne_list,
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've': self.ve_string_splitter,
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},
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'iso_umounter': {
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'cb': self.ne_list,
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've': self.ve_string_splitter,
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},
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'squash_mounter': {
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'cb': self.ne_list,
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've': self.ve_string_splitter,
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},
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'squash_umounter': {
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'cb': self.ne_list,
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've': self.ve_string_splitter,
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},
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'merge_livecd_root': {
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'cb': self.valid_dir,
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've': self.ve_string_stripper,
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},
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'custom_packages_remove_cmd': {
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'cb': self.valid_ascii,
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've': self.ve_string_stripper,
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},
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'custom_packages_add_cmd': {
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'cb': self.valid_ascii,
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've': self.ve_string_stripper,
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},
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'packages_to_remove': {
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'cb': self.ne_list,
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've': self.valid_comma_sep_list,
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},
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'packages_to_add': {
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'cb': self.ne_list,
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've': self.valid_comma_sep_list,
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},
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'repositories_update_cmd': {
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'cb': self.ne_list,
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've': self.ve_string_splitter,
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},
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'execute_repositories_update': {
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'cb': self.valid_ascii,
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've': self.ve_string_stripper,
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},
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'paths_to_remove': {
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'cb': self.ne_list,
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've': self.valid_path_list,
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},
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'paths_to_empty': {
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'cb': self.ne_list,
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've': self.valid_path_list,
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},
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}
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def get_execution_steps(self):
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return [IsoUnpackHandler, ChrootHandler, TarHandler]
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