Fabio Erculiani
628 lines
21 KiB
Python
628 lines
21 KiB
Python
# -*- 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 array
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import os
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import shutil
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import tempfile
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import gc
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import errno
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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.builtin_plugin import BuiltinHandlerMixin
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from molecule.specs.plugins.remaster_plugin import IsoUnpackHandler as \
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RemasterIsoUnpackHandler, ChrootHandler as RemasterChrootHandler
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import molecule.utils
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class ImageHandler(GenericExecutionStep, BuiltinHandlerMixin):
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LOSETUP_EXEC = "/sbin/losetup"
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MB_IN_BYTES = 1024000
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DEFAULT_IMAGE_FORMATTER = ["/sbin/mkfs.ext3"]
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DEFAULT_IMAGE_MOUNTER = ["/bin/mount", "-o", "loop,rw"]
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DEFAULT_IMAGE_UMOUNTER = ["/bin/umount"]
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def __init__(self, *args, **kwargs):
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GenericExecutionStep.__init__(self, *args, **kwargs)
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# init variables
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self.loop_device = None
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self._tmp_loop_device_fd = None
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self.tmp_loop_device_file = None
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self.image_mb = 0
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self.randomize = False
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self.image_mounted = False
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self.tmp_image_mount = None
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def setup(self):
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self.image_mb = self.metadata['image_mb']
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if self.metadata.get('image_randomize') == "yes":
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self.randomize = True
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sts, loop_device = molecule.utils.exec_cmd_get_status_output(
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[ImageHandler.LOSETUP_EXEC, "-f"])
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if sts != 0:
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# ouch
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("setup hook failed"), _("cannot setup loop device"),
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)
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)
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return sts
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try:
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self._tmp_loop_device_fd, self.tmp_loop_device_file = \
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tempfile.mkstemp(prefix = "molecule", dir = "/var/tmp")
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except (OSError, IOError,) as err:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("setup hook failed"), _("cannot create temporary file"),
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)
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)
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return 1
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# bind loop device
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args = [ImageHandler.LOSETUP_EXEC, loop_device,
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self.tmp_loop_device_file]
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rc = molecule.utils.exec_cmd(args)
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if rc != 0:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("setup hook failed"), _("cannot bind loop device"),
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)
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)
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return 1
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self.loop_device = loop_device
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self.tmp_image_mount = molecule.utils.mkdtemp()
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# setup metadata for next phases
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self.metadata['ImageHandler_loop_device_file'] = \
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self.tmp_loop_device_file
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self.metadata['ImageHandler_tmp_image_mount'] = self.tmp_image_mount
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self.metadata['ImageHandler_loop_device'] = self.loop_device
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self.metadata['ImageHandler_kill_loop_device'] = self._kill_loop_device
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return 0
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def pre_run(self):
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self._output.output("[%s|%s] %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("executing pre_run"),
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)
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)
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# run pre image script
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exec_script = self.metadata.get('pre_image_script')
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if exec_script:
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env = os.environ.copy()
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env['TMP_IMAGE_PATH'] = self.tmp_loop_device_file
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env['LOOP_DEVICE'] = self.loop_device
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("spawning"), exec_script,
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)
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)
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rc = molecule.utils.exec_cmd(exec_script, env = env)
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if rc != 0:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("pre image hook 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 _fill_image_file(self):
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"""
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Fill image file (using _tmp_loop_device_fd) with either zeroes or
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random data of image_mb size.
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@raises IOError: if space is not enough
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@raises OSError: well, sorry
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"""
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if self.randomize:
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self._output.output("[%s|%s] %s => %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("generating random base image file"),
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self.tmp_loop_device_file,
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)
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)
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else:
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self._output.output("[%s|%s] %s => %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("generating zeroed base image file"),
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self.tmp_loop_device_file,
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)
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)
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image_mb = self.image_mb
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loop_f = os.fdopen(self._tmp_loop_device_fd, "wb")
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self._tmp_loop_device_fd = None
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arr = None
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mb_bytes = ImageHandler.MB_IN_BYTES
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while image_mb > 0:
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image_mb -= 1
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if self.randomize:
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arr = array.array('c', os.urandom(mb_bytes))
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else:
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arr = array.array('c', chr(0)*mb_bytes)
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arr.tofile(loop_f)
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del arr
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gc.collect()
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# file self._tmp_loop_device_fd is closed here.
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# no more writes needed
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loop_f.flush()
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loop_f.close()
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# last but not least, tell the loop device that the file size changed
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args = [ImageHandler.LOSETUP_EXEC, "-c", self.loop_device]
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("spawning"), args,
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)
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)
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rc = molecule.utils.exec_cmd(args)
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if rc != 0:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("image file resize failed"), rc,
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)
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)
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return rc
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def run(self):
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self._output.output("[%s|%s] %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("run hook called"),
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)
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)
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# fill image file
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try:
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rc = self._fill_image_file()
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if rc != 0:
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return rc
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except (IOError, OSError) as err:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("image file generation failed"), err,
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)
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)
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return 1
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# format image file
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image_formatter = self.metadata.get('image_formatter',
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ImageHandler.DEFAULT_IMAGE_FORMATTER)
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formatter_args = image_formatter + [self.loop_device]
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("spawning"), formatter_args,
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)
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)
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rc = molecule.utils.exec_cmd(formatter_args)
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if rc != 0:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("image formatter hook failed"), rc,
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)
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)
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return rc
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# mount image file
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mounter = self.metadata.get('image_mounter',
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ImageHandler.DEFAULT_IMAGE_MOUNTER)
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mount_args = mounter + [self.loop_device, self.tmp_image_mount]
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("spawning"), mount_args,
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)
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)
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rc = molecule.utils.exec_cmd(mount_args)
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if rc != 0:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("image mount failed"), rc,
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)
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)
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return rc
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self.image_mounted = True
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return 0
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def post_run(self):
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""" Nothing to do """
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return 0
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def _kill_loop_device(self, preserve_loop_device_file = False):
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if self.image_mounted:
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umounter = self.metadata.get('image_umounter',
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ImageHandler.DEFAULT_IMAGE_UMOUNTER)
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args = umounter + [self.tmp_image_mount]
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rc = molecule.utils.exec_cmd(args)
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if rc != 0:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("unable to umount loop device"), self.loop_device,
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)
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)
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else:
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self.image_mounted = False
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if self.tmp_image_mount is not None:
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try:
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os.rmdir(self.tmp_image_mount)
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except OSError:
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pass
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# kill loop device
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if self.loop_device is not None:
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rc = molecule.utils.exec_cmd([ImageHandler.LOSETUP_EXEC, "-d",
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self.loop_device])
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if rc != 0:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("unable to kill loop device"), self.loop_device,
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)
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)
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else:
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self.loop_device = None
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if (self.tmp_loop_device_file is not None) and \
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(not preserve_loop_device_file):
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try:
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os.remove(self.tmp_loop_device_file)
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self.tmp_loop_device_file = None
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except OSError as err:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("unable to remove temp. loop device file"),
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err,
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)
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)
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def kill(self, success = True):
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# kill tmp files
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if self._tmp_loop_device_fd is not None:
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try:
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os.close(self._tmp_loop_device_fd)
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except IOError as err:
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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("unable to close temp fd"), err,
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)
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)
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self._tmp_loop_device_fd = None
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if not success:
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self._kill_loop_device()
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self._run_error_script(None, None, None)
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return 0
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class IsoUnpackHandler(RemasterIsoUnpackHandler):
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def setup(self):
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unpack_prefix = molecule.utils.mkdtemp(suffix = "chroot")
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self.metadata['chroot_tmp_dir'] = unpack_prefix
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self.metadata['chroot_unpack_path'] = \
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self.metadata['ImageHandler_tmp_image_mount']
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self.dest_root = os.path.join(unpack_prefix, "cdroot")
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# setup upcoming new chroot path
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self.chroot_dir = self.metadata['chroot_unpack_path']
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# explicitly set this to None
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self.metadata['cdroot_path'] = None
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return 0
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def kill(self, success = True):
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# ImageHandler sets this
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if not success:
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self.metadata['ImageHandler_kill_loop_device']()
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RemasterIsoUnpackHandler.kill(self, success = success)
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# we don't need the whole dir
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tmp_dir = self.metadata['chroot_tmp_dir']
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if os.path.isdir(tmp_dir):
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try:
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shutil.rmtree(tmp_dir, True)
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except (shutil.Error, OSError,):
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self._output.output("[%s|%s] %s: %s" % (
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blue("IsoUnpackHandler"), darkred(self.spec_name),
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_("unable to remove temp. dir"), tmp_dir,
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)
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)
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return 0
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class ChrootHandler(RemasterChrootHandler):
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def setup(self):
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# to make superclass working
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self.source_dir = self.metadata['chroot_unpack_path']
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self.dest_dir = self.source_dir
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return 0
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def kill(self, success = True):
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# ImageHandler sets this
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if not success:
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self.metadata['ImageHandler_kill_loop_device']()
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RemasterChrootHandler.kill(self, success = success)
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return 0
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class FinalImageHandler(GenericExecutionStep, BuiltinHandlerMixin):
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MD5_EXT = ".md5"
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IMAGE_EXT = ".img"
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def __init__(self, *args, **kwargs):
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GenericExecutionStep.__init__(self, *args, **kwargs)
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def setup(self):
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# ImageHandler sets this
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self.tmp_loop_device_file = \
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self.metadata['ImageHandler_loop_device_file']
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# umount all, but don't remove our loop device file
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self.metadata['ImageHandler_kill_loop_device'](
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preserve_loop_device_file = True)
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image_name = self.metadata.get('image_name',
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os.path.basename(self.metadata['source_iso']) + \
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FinalImageHandler.IMAGE_EXT)
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self.dest_path = os.path.join(
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self.metadata['destination_image_directory'], image_name)
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dest_path_dir = os.path.dirname(self.dest_path)
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if (not os.path.lexists(dest_path_dir)) and \
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(not os.path.isdir(dest_path_dir)):
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os.makedirs(dest_path_dir, 0o755)
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return 0
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def pre_run(self):
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""" Nothing to do """
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return 0
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def run(self):
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self._output.output("[%s|%s] %s: %s %s" % (
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blue("FinalImageHandler"), darkred(self.spec_name),
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_("run hook called"), _("moving image file to destination"),
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self.dest_path,
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)
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)
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try:
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os.rename(self.tmp_loop_device_file, self.dest_path)
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except OSError as err:
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if err.errno != errno.EXDEV:
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raise
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# cannot move atomically, fallback to shutil.move
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try:
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shutil.move(self.tmp_loop_device_file, self.dest_path)
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except shutil.Error:
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raise
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self._output.output("[%s|%s] %s: %s" % (
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blue("FinalImageHandler"), darkred(self.spec_name),
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_("built image"), self.dest_path,
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)
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)
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if os.path.isfile(self.dest_path) and os.access(self.dest_path, os.R_OK):
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self._output.output("[%s|%s] %s: %s" % (
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blue("FinalImageHandler"), darkred(self.spec_name),
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_("generating md5 for"), self.dest_path,
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)
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)
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digest = molecule.utils.md5sum(self.dest_path)
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md5file = self.dest_path + FinalImageHandler.MD5_EXT
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with open(md5file, "w") as f:
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f.write("%s %s\n" % (digest,
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os.path.basename(self.dest_path),))
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f.flush()
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def post_run(self):
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# run post tar script
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exec_script = self.metadata.get('post_image_script')
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if exec_script:
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env = os.environ.copy()
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env['IMAGE_PATH'] = self.dest_path
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env['IMAGE_CHECKSUM_PATH'] = self.dest_path + \
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FinalImageHandler.MD5_EXT
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self._output.output("[%s|%s] %s: %s" % (
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blue("FinalImageHandler"), darkred(self.spec_name),
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_("spawning"), exec_script,
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)
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)
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rc = molecule.utils.exec_cmd(exec_script, env = env)
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if rc != 0:
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self._output.output("[%s|%s] %s: %s" % (
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blue("FinalImageHandler"), darkred(self.spec_name),
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_("post image hook 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 kill(self, success = True):
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""" Nothing to do """
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return 0
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class IsoToImageSpec(GenericSpec):
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PLUGIN_API_VERSION = 0
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@staticmethod
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def execution_strategy():
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return "iso_to_image"
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def vital_parameters(self):
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return [
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"source_iso",
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"destination_image_directory",
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"image_mb",
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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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'release_string': {
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'cb': self.ne_string, # validation callback
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've': self.ve_string_stripper, # value extractor
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},
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'release_version': {
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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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'release_desc': {
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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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'release_file': {
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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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'source_iso': {
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'cb': self.valid_path_string,
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've': self.ve_string_stripper,
|
|
},
|
|
'image_name': {
|
|
'cb': self.ne_string,
|
|
've': self.ve_string_stripper,
|
|
},
|
|
'image_formatter': {
|
|
'cb': self.ne_list,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'image_mounter': {
|
|
'cb': self.ne_list,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'image_umounter': {
|
|
'cb': self.ne_list,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'image_mb': {
|
|
'cb': self.valid_integer,
|
|
've': self.ve_integer_converter,
|
|
},
|
|
'image_randomize': {
|
|
'cb': self.valid_ascii,
|
|
've': self.ve_string_stripper,
|
|
},
|
|
'error_script': {
|
|
'cb': self.valid_exec_first_list_item,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'outer_chroot_script': {
|
|
'cb': self.valid_exec_first_list_item,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'inner_chroot_script': {
|
|
'cb': self.valid_path_string_first_list_item,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'inner_chroot_script_after': {
|
|
'cb': self.valid_path_string_first_list_item,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'outer_chroot_script_after': {
|
|
'cb': self.valid_exec_first_list_item,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'destination_image_directory': {
|
|
'cb': self.valid_dir,
|
|
've': self.ve_string_stripper,
|
|
},
|
|
'pre_image_script': {
|
|
'cb': self.valid_exec_first_list_item,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'post_image_script': {
|
|
'cb': self.valid_exec_first_list_item,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'iso_mounter': {
|
|
'cb': self.ne_list,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'iso_umounter': {
|
|
'cb': self.ne_list,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'squash_mounter': {
|
|
'cb': self.ne_list,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'squash_umounter': {
|
|
'cb': self.ne_list,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'custom_packages_remove_cmd': {
|
|
'cb': self.valid_ascii,
|
|
've': self.ve_string_stripper,
|
|
},
|
|
'custom_packages_add_cmd': {
|
|
'cb': self.valid_ascii,
|
|
've': self.ve_string_stripper,
|
|
},
|
|
'packages_to_remove': {
|
|
'cb': self.ne_list,
|
|
've': self.valid_comma_sep_list,
|
|
},
|
|
'packages_to_add': {
|
|
'cb': self.ne_list,
|
|
've': self.valid_comma_sep_list,
|
|
},
|
|
'repositories_update_cmd': {
|
|
'cb': self.ne_list,
|
|
've': self.ve_string_splitter,
|
|
},
|
|
'execute_repositories_update': {
|
|
'cb': self.valid_ascii,
|
|
've': self.ve_string_stripper,
|
|
},
|
|
'paths_to_remove': {
|
|
'cb': self.ne_list,
|
|
've': self.valid_path_list,
|
|
},
|
|
'paths_to_empty': {
|
|
'cb': self.ne_list,
|
|
've': self.valid_path_list,
|
|
},
|
|
}
|
|
|
|
def get_execution_steps(self):
|
|
return [ImageHandler, IsoUnpackHandler, ChrootHandler,
|
|
FinalImageHandler]
|