Fabio Erculiani
343 lines
12 KiB
Python
343 lines
12 KiB
Python
# -*- coding: utf-8 -*-
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# Molecule Disc Image builder for Sabayon Linux
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# Copyright (C) 2012 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 shutil
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import tempfile
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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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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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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.image_mb = 0
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self._tmp_image_file_fd = None
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self._tmp_image_file = None
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def setup(self):
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self.image_mb = self.metadata['image_mb']
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try:
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self._tmp_image_file_fd, self._tmp_image_file = \
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tempfile.mkstemp(prefix = "molecule",
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dir = self._config['tmp_dir'],
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suffix=".mmc_img")
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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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self.metadata['MmcImageHandler_image_file'] = self._tmp_image_file
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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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self._output.output("[%s|%s] %s: %s" % (
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blue("ImageHandler"), darkred(self.spec_name),
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_("spawning"), " ".join(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 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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# run pre image script
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oexec_script = self.metadata.get('image_generator_script')
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if oexec_script:
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exec_script = oexec_script + [
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self._tmp_image_file, str(self.metadata['image_mb']),
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self.metadata['source_boot_directory'],
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self.metadata['source_chroot']]
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env = os.environ.copy()
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env['PATHS_TO_REMOVE'] = ";".join(
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self.metadata.get('paths_to_remove', []))
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env['PATHS_TO_EMPTY'] = ";".join(
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self.metadata.get('paths_to_empty', []))
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env['RELEASE_STRING'] = self.metadata['release_string']
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env['RELEASE_VERSION'] = self.metadata['release_version']
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env['RELEASE_DESC'] = self.metadata['release_desc']
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env['RELEASE_FILE'] = self.metadata['release_file']
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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"), " ".join(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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_("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 post_run(self):
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""" Nothing to run """
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return 0
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def kill(self, success = True):
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# kill tmp files
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if self._tmp_image_file_fd is not None:
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try:
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os.close(self._tmp_image_file_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_image_file_fd = None
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if not success:
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env = os.environ.copy()
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self._run_error_script(None, None, None, env = env)
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if self._tmp_image_file is not None:
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os.remove(self._tmp_image_file)
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self._tmp_image_file = None
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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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def __init__(self, *args, **kwargs):
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GenericExecutionStep.__init__(self, *args, **kwargs)
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self.dest_path = None
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self._tmp_image_file = None
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def setup(self):
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self._tmp_image_file = self.metadata['MmcImageHandler_image_file']
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image_name = self.metadata.get('image_name')
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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_image_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_image_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 \
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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"), " ".join(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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if not success:
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if self._tmp_image_file is not None:
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if os.path.isfile(self._tmp_image_file):
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os.remove(self._tmp_image_file)
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return 0
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class ChrootToMmcImageSpec(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 "chroot_to_mmc"
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def vital_parameters(self):
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return [
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"release_string",
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"release_version",
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"release_desc",
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"release_file",
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"source_chroot",
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"source_boot_directory",
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"destination_image_directory",
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"image_generator_script",
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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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'execution_strategy': {
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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_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_chroot': {
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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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'image_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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'image_mb': {
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'cb': self.valid_integer,
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've': self.ve_integer_converter,
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},
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'image_generator_script': {
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'cb': self.valid_exec_first_list_item,
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've': self.ve_command_splitter,
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},
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'error_script': {
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'cb': self.valid_exec_first_list_item,
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've': self.ve_command_splitter,
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},
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'destination_image_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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'source_boot_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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'pre_image_script': {
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'cb': self.valid_exec_first_list_item,
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've': self.ve_command_splitter,
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},
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'post_image_script': {
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'cb': self.valid_exec_first_list_item,
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've': self.ve_command_splitter,
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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 [ImageHandler, FinalImageHandler]
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