OSTree based image for arm64 uboot

Create a yaml file for use with debos,
Add a script to install boot files in the image to be generated.
A small workaround allows to place arm64 dtbs at the appropriate
location to be found by u-boot.

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.co.uk>
Signed-off-by: Frédéric Dalleau <frederic.dalleau@collabora.com>
Reviewed-by: Héctor Orón Martínez <hector.oron@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D7600

apertis-ostree-image-uboot.yaml

+{{ $architecture := or .architecture "arm64" }}
+{{ $type := or .type "minimal" }}
+{{ $suite := or .suite "18.03" }}
+{{ $image := or .image (printf "apertis-ostree-%s-%s-%s" $suite  $type $architecture) }}
+
+{{ $board := or .board "uboot" }}
+{{ $repourl := or .repourl "https://images.apertis.org/ostree/repo" }}
+{{ $osname := or .osname "apertis" }}
+{{ $branch := or .branch (printf "%s/%s/%s-%s/%s" $osname $suite $architecture $board $type) }}
+{{ $ostree := or .ostree "repo" }}
+
+{{ $cmdline := or .cmdline "console=tty0 console=ttyS0,115200n8 rootwait rw quiet splash plymouth.ignore-serial-consoles" }}
+
+architecture: {{ $architecture }}
+
+actions:
+  - action: image-partition
+    imagename: {{ $image }}.img
+{{ if eq $type "minimal" }}
+    imagesize: 4G
+{{end}}
+{{ if eq $type "target" "development" }}
+    imagesize: 15G
+{{end}}
+    partitiontype: gpt
+
+    mountpoints:
+      - mountpoint: /
+        partition: system
+      - mountpoint: /boot
+        partition: boot
+
+    partitions:
+      - name: boot
+        fs: ext2
+        start: 0%
+        end: 1024M
+        flags: [ boot ]
+        options: [ x-systemd.automount ]
+      - name: system
+        fs: ext4
+        start: 1024M
+        end: 3000M
+      - name: general_storage
+        fs: btrfs
+        start: 3000M
+        end: 100%
+
+  - action: run
+    description: Install bootloader
+    chroot: false
+    script: scripts/setup-uboot-bootloader.sh
+
+  - action: ostree-deploy
+    description: Deploying ostree onto image
+    repository: {{ $ostree }}
+    remote_repository: {{ $repourl }}
+    branch: {{ $branch }}
+    os: {{ $osname }}
+    append-kernel-cmdline: {{ $cmdline }}
+
+  - action: run
+    description: Create block map for {{ $image }}.img
+    postprocess: true
+    command: bmaptool create {{ $image }}.img > {{ $image }}.img.bmap
+
+  - action: run
+    description: Compress {{ $image }}.img
+    postprocess: true
+    command: gzip -f {{ $image }}.img
+
+  - action: run
+    description: Checksum for {{ $image }}.img.gz
+    postprocess: true
+    command: md5sum {{ $image }}.img.gz > {{ $image }}.img.gz.md5

scripts/ostree-convert-from-debian

@@ -46,6 +46,10 @@ def setup_boot (rootdir, bootdir):
                 initrd.replace ("initrd.img", "initramfs") + "-" + csum))
 
     if dtbs != None:
+        # Workaround the fact that dtbs are stored in /boot/dtbs/version
+        if os.path.isdir (os.path.join (dtbs, version)):
+           dtbs = os.path.join (dtbs, version)
+
         shutil.move (dtbs, os.path.join (bootdir, "dtbs-" + version + "-" + csum))
 
 def split_passwd_files (rootdir):

scripts/setup-uboot-bootloader.sh

+#!/bin/bash
+
+set -e
+
+if [ -z  "${ROOTDIR}" ] ; then
+  echo "ROOTDIR not given"
+  exit 1
+fi
+
+mkdir -p ${ROOTDIR}/boot/extlinux
+mkdir -p ${ROOTDIR}/boot/loader.0
+ln -s loader.0  ${ROOTDIR}/boot/loader
+ln -s ../loader/extlinux.conf ${ROOTDIR}/boot/extlinux/extlinux.conf
+cat << EOF > ${ROOTDIR}/boot/extlinux/extlinux.conf
+menu title Apertis OStree image
+timeout 10
+
+EOF