wic: add new bootimg-partition plugin

This patch implements 'bootimg-partition source plugin class for 'wic'. The
plugin creates an image of boot partition, copying over files listed in
IMAGE_BOOT_FILES bitbake variable.

(From OE-Core rev: 4a3200d710d953956064c28188577fbd461d093d)

Signed-off-by: Maciej Borzecki <maciej.borzecki@open-rnd.pl>
Signed-off-by: Maciek Borzecki <maciek.borzecki@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/plugins/source/bootimg-partition.py

@@ -0,0 +1,108 @@
+# ex:ts=4:sw=4:sts=4:et
+# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# 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.
+#
+# DESCRIPTION
+# This implements the 'bootimg-partition' source plugin class for
+# 'wic'. The plugin creates an image of boot partition, copying over
+# files listed in IMAGE_BOOT_FILES bitbake variable.
+#
+# AUTHORS
+# Maciej Borzecki <maciej.borzecki (at] open-rnd.pl>
+#
+
+import os
+import re
+
+from wic import msger
+from wic.pluginbase import SourcePlugin
+from wic.utils.oe.misc import *
+
+class BootimgPartitionPlugin(SourcePlugin):
+    name = 'bootimg-partition'
+
+    @classmethod
+    def do_install_disk(self, disk, disk_name, cr, workdir, oe_builddir,
+                        bootimg_dir, kernel_dir, native_sysroot):
+        """
+        Called after all partitions have been prepared and assembled into a
+        disk image. Do nothing.
+        """
+        pass
+
+    @classmethod
+    def do_configure_partition(self, part, source_params, cr, cr_workdir,
+                               oe_builddir, bootimg_dir, kernel_dir,
+                               native_sysroot):
+        """
+        Called before do_prepare_partition(). Possibly prepare
+        configuration files of some sort.
+
+        """
+        pass
+
+    @classmethod
+    def do_prepare_partition(self, part, source_params, cr, cr_workdir,
+                             oe_builddir, bootimg_dir, kernel_dir,
+                             rootfs_dir, native_sysroot):
+        """
+        Called to do the actual content population for a partition i.e. it
+        'prepares' the partition to be incorporated into the image.
+        In this case, does the following:
+        - sets up a vfat partition
+        - copies all files listed in IMAGE_BOOT_FILES variable
+        """
+        hdddir = "%s/boot" % cr_workdir
+        rm_cmd = "rm -rf %s" % cr_workdir
+        exec_cmd(rm_cmd)
+
+        install_cmd = "install -d %s" % hdddir
+        exec_cmd(install_cmd)
+
+        msger.debug('Bootimg dir: %s' % bootimg_dir)
+        img_deploy_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
+        boot_files = get_bitbake_var("IMAGE_BOOT_FILES")
+
+        if not boot_files:
+            msger.error('No boot files defined, IMAGE_BOOT_FILES unset')
+
+        msger.debug('Boot files: %s' % boot_files)
+
+        # list of tuples (src_name, dst_name)
+        deploy_files = []
+        for src_entry in re.findall(r'[\w;\-\./]+', boot_files):
+            if ';' in src_entry:
+                dst_entry = tuple(src_entry.split(';'))
+            else:
+                dst_entry = (src_entry, src_entry)
+
+            msger.debug('Destination entry: %r' % (dst_entry,))
+            deploy_files.append(dst_entry)
+
+        for deploy_entry in deploy_files:
+            src, dst = deploy_entry
+            src_path = os.path.join(img_deploy_dir, src)
+            dst_path = os.path.join(hdddir, dst)
+
+            msger.debug('Install %s as %s' % (os.path.basename(src_path),
+                                              dst_path))
+            install_cmd = "install -m 0644 -D %s %s" \
+                          % (src_path, dst_path)
+            exec_cmd(install_cmd)
+
+        msger.debug('Prepare boot partition using rootfs in %s' % (hdddir))
+        part.prepare_rootfs(cr_workdir, oe_builddir, hdddir,
+                            native_sysroot)
+