[PATCH v2 2/4] meta/classes: added ubifs-img class

[claudius.heine.ext@siemens.com]

From: Claudius Heine <ch@denx.de>

This class adds support for UBIFS file system images.

Signed-off-by: Claudius Heine <ch@denx.de>
---
 doc/user_manual.md             |  1 +
 meta/classes/ubifs-img.bbclass | 44 ++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 meta/classes/ubifs-img.bbclass

diff --git a/doc/user_manual.md b/doc/user_manual.md
index c4fe42a..c9924ad 100644
--- a/doc/user_manual.md
+++ b/doc/user_manual.md
@@ -476,6 +476,7 @@ Isar contains additional image type classes that can be used as reference:
  - `ext4-img`
  - `rpi-sdimg`
  - `targz-img`
+ - `ubifs-img`
  - `wic-img`
 
 ---
diff --git a/meta/classes/ubifs-img.bbclass b/meta/classes/ubifs-img.bbclass
new file mode 100644
index 0000000..79cb19d
--- /dev/null
+++ b/meta/classes/ubifs-img.bbclass
@@ -0,0 +1,44 @@
+# This software is a part of ISAR.
+# Copyright (C) Siemens AG, 2019
+#
+# SPDX-License-Identifier: MIT
+
+python() {
+    if not d.getVar("MKUBIFS_ARGS"):
+        bb.fatal("MKUBIFS_ARGS must be set")
+}
+
+inherit image
+
+UBIFS_IMAGE_FILE ?= "${IMAGE_FULLNAME}.ubifs.img"
+
+IMAGER_INSTALL += "mtd-utils"
+
+PP = "/home/builder/${PN}"
+PP_DEPLOY = "${PP}/deploy"
+PP_ROOTFS = "${PP}/rootfs"
+
+BUILDROOT = "${BUILDCHROOT_DIR}${PP}"
+BUILDROOT_DEPLOY = "${BUILDCHROOT_DIR}${PP_DEPLOY}"
+BUILDROOT_ROOTFS = "${BUILDCHROOT_DIR}${PP_ROOTFS}"
+
+do_ubifs_image[stamp-extra-info] = "${DISTRO}-${MACHINE}"
+
+# Generate ubifs filesystem image
+do_ubifs_image() {
+    rm -f ${DEPLOY_DIR_IMAGE}/${UBIFS_IMAGE_FILE}
+
+    buildchroot_do_mounts
+
+    sudo flock ${MOUNT_LOCKFILE} -c ' \
+        mkdir -p ${BUILDROOT_DEPLOY} ${BUILDROOT_ROOTFS}
+        mount --bind ${DEPLOY_DIR_IMAGE} ${BUILDROOT_DEPLOY}
+        mount --bind ${IMAGE_ROOTFS} ${BUILDROOT_ROOTFS}
+    '
+
+    # Create ubifs image using buildchroot tools
+    sudo chroot ${BUILDCHROOT_DIR} /usr/sbin/mkfs.ubifs ${MKUBIFS_ARGS} \
+                -r "${PP_ROOTFS}" "${PP_DEPLOY}/${UBIFS_IMAGE_FILE}"
+}
+
+addtask ubifs_image before do_build after do_copy_boot_files do_install_imager_deps
-- 
2.20.1