1 files changed, 193 insertions, 0 deletions

diff --git a/scripts/lib/wic/imager/baseimager.py b/scripts/lib/wic/imager/baseimager.py
new file mode 100644
index 0000000000..5bcd2f7529
--- /dev/null
+++ b/scripts/lib/wic/imager/baseimager.py
@@ -0,0 +1,193 @@
+#!/usr/bin/python -tt
+#
+# Copyright (c) 2007 Red Hat  Inc.
+# Copyright (c) 2009, 2010, 2011 Intel, Inc.
+#
+# 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; version 2 of the License
+#
+# 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., 59
+# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+from __future__ import with_statement
+import os, sys
+import tempfile
+import shutil
+
+from wic import kickstart
+from wic import msger
+from wic.utils.errors import CreatorError
+from wic.utils import misc, runner, fs_related as fs
+
+class BaseImageCreator(object):
+    """Base class for image creation.
+
+    BaseImageCreator is the simplest creator class available; it will
+    create a system image according to the supplied kickstart file.
+
+    e.g.
+
+      import wic.imgcreate as imgcreate
+      ks = imgcreate.read_kickstart("foo.ks")
+      imgcreate.ImageCreator(ks, "foo").create()
+    """
+
+    def __del__(self):
+        self.cleanup()
+
+    def __init__(self, createopts = None):
+        """Initialize an ImageCreator instance.
+
+        ks -- a pykickstart.KickstartParser instance; this instance will be
+              used to drive the install by e.g. providing the list of packages
+              to be installed, the system configuration and %post scripts
+
+        name -- a name for the image; used for e.g. image filenames or
+                filesystem labels
+        """
+
+        self.__builddir = None
+
+        self.ks = None
+        self.name = "target"
+        self.tmpdir = "/var/tmp/wic"
+        self.workdir = "/var/tmp/wic/build"
+
+        # setup tmpfs tmpdir when enabletmpfs is True
+        self.enabletmpfs = False
+
+        if createopts:
+            # Mapping table for variables that have different names.
+            optmap = {"outdir" : "destdir",
+                     }
+
+            # update setting from createopts
+            for key in createopts.keys():
+                if key in optmap:
+                    option = optmap[key]
+                else:
+                    option = key
+                setattr(self, option, createopts[key])
+
+            self.destdir = os.path.abspath(os.path.expanduser(self.destdir))
+
+        self._dep_checks = ["ls", "bash", "cp", "echo"]
+
+        # Output image file names
+        self.outimage = []
+
+        # No ks provided when called by convertor, so skip the dependency check
+        if self.ks:
+            # If we have btrfs partition we need to check necessary tools
+            for part in self.ks.handler.partition.partitions:
+                if part.fstype and part.fstype == "btrfs":
+                    self._dep_checks.append("mkfs.btrfs")
+                    break
+
+        # make sure the specified tmpdir and cachedir exist
+        if not os.path.exists(self.tmpdir):
+            os.makedirs(self.tmpdir)
+
+
+    #
+    # Hooks for subclasses
+    #
+    def _create(self):
+        """Create partitions for the disk image(s)
+
+        This is the hook where subclasses may create the partitions
+        that will be assembled into disk image(s).
+
+        There is no default implementation.
+        """
+        pass
+
+    def _cleanup(self):
+        """Undo anything performed in _create().
+
+        This is the hook where subclasses must undo anything which was
+        done in _create().
+
+        There is no default implementation.
+
+        """
+        pass
+
+    #
+    # Actual implementation
+    #
+    def __ensure_builddir(self):
+        if not self.__builddir is None:
+            return
+
+        try:
+            self.workdir = os.path.join(self.tmpdir, "build")
+            if not os.path.exists(self.workdir):
+                os.makedirs(self.workdir)
+            self.__builddir = tempfile.mkdtemp(dir = self.workdir,
+                                               prefix = "imgcreate-")
+        except OSError, (err, msg):
+            raise CreatorError("Failed create build directory in %s: %s" %
+                               (self.tmpdir, msg))
+
+    def __setup_tmpdir(self):
+        if not self.enabletmpfs:
+            return
+
+        runner.show('mount -t tmpfs -o size=4G tmpfs %s' % self.workdir)
+
+    def __clean_tmpdir(self):
+        if not self.enabletmpfs:
+            return
+
+        runner.show('umount -l %s' % self.workdir)
+
+    def create(self):
+        """Create partitions for the disk image(s)
+
+        Create the partitions that will be assembled into disk
+        image(s).
+        """
+        self.__setup_tmpdir()
+        self.__ensure_builddir()
+
+        self._create()
+
+    def cleanup(self):
+        """Undo anything performed in create().
+
+        Note, make sure to call this method once finished with the creator
+        instance in order to ensure no stale files are left on the host e.g.:
+
+          creator = ImageCreator(ks, name)
+          try:
+              creator.create()
+          finally:
+              creator.cleanup()
+
+        """
+        if not self.__builddir:
+            return
+
+        self._cleanup()
+
+        shutil.rmtree(self.__builddir, ignore_errors = True)
+        self.__builddir = None
+
+        self.__clean_tmpdir()
+
+
+    def print_outimage_info(self):
+        msg = "The new image can be found here:\n"
+        self.outimage.sort()
+        for file in self.outimage:
+            msg += '  %s\n' % os.path.abspath(file)
+
+        msger.info(msg)