[meta-ti] [PATCH] wic: wks and source plugin for creating SD card images

[Maciej Borzecki]

Commit 2b524321a25c35c5f987b8331e41b49d3b2e2d2b removed bbclass for
building SD card images in favor of using wic. This commit adds a mic
source plugin that prepares a useable boot partition as part of wic's
image creation process. The plugin defines a new source type -
beaglebonebootimg, similarly to the existing bootimg-{efi,pcbios} in
current poky tree.

An example *.wks for setting up the partitions is provided as well.
Usage:

  wic create beaglebonesdimage -e core-image-minimal

Signed-off-by: Maciej Borzecki <maciej.borzecki at open-rnd.pl>
Signed-off-by: Maciek Borzecki <maciek.borzecki at gmail.com>
---
 scripts/lib/image/canned-wks/beaglebonesdimage.wks |   5 +
 .../lib/mic/plugins/source/beaglebonebootimg.py    | 109 +++++++++++++++++++++
 2 files changed, 114 insertions(+)
 create mode 100644 scripts/lib/image/canned-wks/beaglebonesdimage.wks
 create mode 100644 scripts/lib/mic/plugins/source/beaglebonebootimg.py

diff --git a/scripts/lib/image/canned-wks/beaglebonesdimage.wks b/scripts/lib/image/canned-wks/beaglebonesdimage.wks
new file mode 100644
index 0000000..efd302d
--- /dev/null
+++ b/scripts/lib/image/canned-wks/beaglebonesdimage.wks
@@ -0,0 +1,5 @@
+# short-description: Create SD card image for BeagleBone
+# long-description: Creates a partitioned SD card image for use with BeagleBone
+
+part /boot --source beaglebonebootimg --ondisk mmcblk0 --fstype=vfat --label boot --active --align 1024 --size 10
+part / --source rootfs --ondisk mmcblk0 --fstype=ext3 --label root --align 1024
diff --git a/scripts/lib/mic/plugins/source/beaglebonebootimg.py b/scripts/lib/mic/plugins/source/beaglebonebootimg.py
new file mode 100644
index 0000000..969632b
--- /dev/null
+++ b/scripts/lib/mic/plugins/source/beaglebonebootimg.py
@@ -0,0 +1,109 @@
+# 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 'beaglebonebootimg' source plugin class for 'wic'
+#
+# AUTHORS
+# Maciej Borzecki <maciej.borzecki (at] open-rnd.pl>
+#
+
+import os
+import shutil
+import re
+import tempfile
+
+from mic import kickstart, chroot, msger
+from mic.utils import misc, fs_related, errors, runner, cmdln
+from mic.conf import configmgr
+from mic.plugin import pluginmgr
+from mic.utils.partitionedfs import PartitionedMount
+import mic.imager.direct as direct
+from mic.pluginbase import SourcePlugin
+from mic.utils.oe.misc import *
+from mic.imager.direct import DirectImageCreator
+
+class BootimgPcbiosPlugin(SourcePlugin):
+    name = 'beaglebonebootimg'
+
+    @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, 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, 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 u-boot
+        - copies MLO
+        """
+        hdddir = "%s/boot" % cr_workdir
+        rm_cmd = "rm -rf %s" % cr_workdir
+        exec_cmd(rm_cmd)
+
+        install_cmd = "install -d %s" % hdddir
+        tmp = exec_cmd(install_cmd)
+
+        img_deploy_dir = get_bitbake_var("DEPLOY_DIR_IMAGE")
+
+        mlo_img = "MLO"
+        mlo_src_path = os.path.join(img_deploy_dir, mlo_img)
+
+        uboot_img = "u-boot.img"
+        uboot_src_path = os.path.join(img_deploy_dir, uboot_img)
+
+        for entry in [(mlo_src_path, "MLO"), (uboot_src_path, "u-boot.img")]:
+            file_src, file_dst = entry
+            print '-- install %s as %s' % (file_src, file_dst)
+            install_cmd = "install -m 0644 %s %s" \
+                          % (file_src, os.path.join(hdddir, file_dst))
+            tmp = exec_cmd(install_cmd)
+
+        if part.get_size() == 0:
+            msger.error('Boot partition may not be 0 in size')
+
+        du_cmd = "du -bks %s" % hdddir
+        rc, out = exec_cmd(du_cmd)
+        blocks = int(out.split()[0])
+
+        extra_blocks = part.get_extra_block_count(blocks)
+        if extra_blocks == 0:
+            msger.error('Not enough space in boot parition')
+
+        part.prepare_empty_partition(cr_workdir, oe_builddir, native_sysroot)
+
+        mcopy_cmd = "mcopy -i %s -s %s/* ::/" % (part.source_file, hdddir)
+        exec_native_cmd(mcopy_cmd, native_sysroot)
+
-- 
1.9.0