wip: use commit sha for uuid

Signed-off-by: Pawel Langowski <pawel.langowski@3mdeb.com>

meta-dts-distro/recipes-dts/images/dts-base-image.inc

@@ -21,6 +21,8 @@ IMAGE_INSTALL:append = " \
     lshw \
 "
 
+LAYER_COMMIT_SHA = "${@'$(cd ${LAYERDIR} && git rev-parse HEAD)'}"
+
 # Enable local auto-login of the root user (local = serial port and
 # virtual console)
 DTS_LOCAL_GETTY ?= " \
@@ -32,3 +34,17 @@ local_autologin () {
 }
 
 ROOTFS_POSTPROCESS_COMMAND += "local_autologin; "
+
+python do_rootfs_wicenv:append() {
+    import hashlib, uuid
+    commit_sha = d.getVar('LAYER_COMMIT_SHA')
+    boot_sha = "boot-" + commit_sha
+    uuid_root = uuid.UUID(hashlib.md5(commit_sha.encode()).hexdigest())
+    uuid_boot = uuid.UUID(hashlib.md5(boot_sha.encode()).hexdigest())
+    with open(os.path.join(outdir, basename) + '.env', 'a') as envf:
+        envf.write('ROOT_UUID="%s"\n' % uuid_root)
+        envf.write('BOOT_UUID="%s"\n' % uuid_boot)
+    envf.close()
+    bb.utils.copyfile(os.path.join(outdir, basename) + '.env', os.path.join(depdir, basename) + '.env')
+
+}

meta-dts-distro/wic/usb-stick-dts.wks.in

@@ -1,4 +1,4 @@
 bootloader --timeout=0 --append=" rootwait"
 
-part /boot --source bootimg-biosplusefi --sourceparams="loader=grub-efi" --ondisk sda --label dts-boot --align 1024 --use-uuid --active --system-id 0xef
-part /     --source rootfs --fstype=ext4                                 --ondisk sda --label dts-root --align 1024 --use-uuid --fixed-size 1024
+part /boot --source bootimg-biosplusefi --sourceparams="loader=grub-efi" --ondisk sda --label dts-boot --align 1024 --uuid ${BOOT_UUID} --active --system-id 0xef
+part /     --source rootfs --fstype=ext4                                 --ondisk sda --label dts-root --align 1024 --uuid ${ROOT_UUID} --fixed-size 1024