docker-tag-native.bb: add recipe

this package helps making sense of docker image builded by yocto,
they are now automatically tagged with:
balenaos-${MACHINE}-${BASENAME}:latest
balenaos-${MACHINE}-${BASENAME}:$(date +%Y%m%d%H%M%S)

Change-type: patch
Signed-off-by: Yann CARDAILLAC <[email protected]>

Author: ycardaillac

meta-balena-common/classes/image_types_balena.bbclass

@@ -384,10 +384,15 @@ IMAGE_CMD:balenaos-img () {
 # partition
 do_rootfs[vardeps] += "BALENA_BOOT_PARTITION_FILES"
 
+do_image_docker[depends] = " \
+    docker-tag-native:do_populate_sysroot \
+    "
+
 # XXX(petrosagg): This should be eventually implemented using a docker-native daemon
 IMAGE_CMD:docker () {
     DOCKER_IMAGE=$(${IMAGE_CMD_TAR} -cv -C ${IMAGE_ROOTFS} . | DOCKER_API_VERSION=${BALENA_API_VERSION} docker import -)
     DOCKER_API_VERSION=${BALENA_API_VERSION} docker save ${DOCKER_IMAGE} > ${BALENA_DOCKER_IMG}
+    docker-tag-native "${DOCKER_IMAGE}" "${MACHINE}" "${IMAGE_BASENAME}"
 }
 
 IMAGE_TYPEDEP:hostapp-ext4 = "docker"

meta-balena-common/recipes-containers/docker-tag-native/docker-tag-native.bb

@@ -0,0 +1,14 @@
+DESCRIPTION = "Helper tool to tag imported docker images"
+LICENSE = "Apache-2.0"
+LIC_FILES_CHKSUM = "file://${COMMON_LICENSE_DIR}/Apache-2.0;md5=89aea4e17d99a7cacdbeed46a0096b10"
+
+inherit native
+
+SRC_URI = "file://docker-tag-native.sh"
+
+S = "${WORKDIR}"
+
+do_install() {
+    install -d ${D}${bindir}
+    install -m 0755 ${WORKDIR}/docker-tag-native.sh ${D}${bindir}/docker-tag-native
+}

meta-balena-common/recipes-containers/docker-tag-native/files/docker-tag-native.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+# Usage: docker-tag-wrapper <image-id> <machine> <basename>
+
+set -eu
+
+IMAGE_ID="$1"
+MACHINE="$2"
+BASENAME="$3"
+
+BASE_TAG="balenaos-${MACHINE}-${BASENAME}:latest"
+DATE_TAG="balenaos-${MACHINE}-${BASENAME}:$(date +%Y%m%d%H%M%S)"
+
+echo "[docker-tag-wrapper] tagging ${IMAGE_ID} -> ${BASE_TAG}, ${DATE_TAG}"
+
+docker tag "${IMAGE_ID}" "${BASE_TAG}"
+docker tag "${IMAGE_ID}" "${DATE_TAG}"