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+# This software is a part of ISAR.
+# Copyright (c) Siemens AG, 2024
+#
+# SPDX-License-Identifier: MIT
+
+FILESPATH:append := ":${FILE_DIRNAME}/files"
+
+inherit dpkg-raw
+
+SRC_URI += " \
+ file://container-loader.service.tmpl \
+ file://container-loader.sh.tmpl"
+
+CONTAINER_COMPRESSION ?= "zst"
+CONTAINER_DELETE_AFTER_LOAD ?= "0"
+
+DEBIAN_DEPENDS += " \
+ ${CONTAINER_ENGINE_PACKAGES} \
+ ${@', gzip' if d.getVar('CONTAINER_COMPRESSION') == 'gz' else \
+ ', zstd' if d.getVar('CONTAINER_COMPRESSION') == 'zst' else \
+ ', xz-utils' if d.getVar('CONTAINER_COMPRESSION') == 'xz' else \
+ ''}"
+
+CONTAINER_COMPRESSOR_CMD = "${@ \
+ 'gzip -f -9 -n --rsyncable' if d.getVar('CONTAINER_COMPRESSION') == 'gz' else \
+ 'xz -f ${XZ_DEFAULTS}' if d.getVar('CONTAINER_COMPRESSION') == 'xz' else \
+ 'zstd -f --rm ${ZSTD_DEFAULTS}' if d.getVar('CONTAINER_COMPRESSION') == 'zst' else \
+ ''}"
+
+CONTAINER_DECOMPRESSOR_CMD = "${@ \
+ 'gzip -c -d -n' if d.getVar('CONTAINER_COMPRESSION') == 'gz' else \
+ 'xz -c -d -T0' if d.getVar('CONTAINER_COMPRESSION') == 'xz' else \
+ 'pzstd -c -d' if d.getVar('CONTAINER_COMPRESSION') == 'zst' else \
+ ''}"
+
+TEMPLATE_FILES += " \
+ container-loader.service.tmpl \
+ container-loader.sh.tmpl"
+TEMPLATE_VARS += " \
+ CONTAINER_ENGINE \
+ CONTAINER_DECOMPRESSOR_CMD \
+ CONTAINER_DELETE_AFTER_LOAD"
+
+do_install() {
+ install -m 755 ${WORKDIR}/container-loader.sh ${D}/usr/share/${BPN}
+}
+do_install[cleandirs] += " \
+ ${D}/usr/share/${BPN} \
+ ${D}/usr/share/${BPN}/images"
+
+python do_install_fetched_containers() {
+ import os
+
+ workdir = d.getVar('WORKDIR')
+ D = d.getVar('D')
+ BPN = d.getVar('BPN')
+
+ image_list = open(D + "/usr/share/" + BPN + "/image.list", "w")
+
+ src_uri = d.getVar('SRC_URI').split()
+ for uri in src_uri:
+ scheme, host, path, _, _, parm = bb.fetch.decodeurl(uri)
+ if scheme != "docker":
+ continue
+
+ image_name = host + (path if path != "/" else "")
+ unpacked_image = workdir + "/" + image_name.replace('/', '.')
+ dest_dir = D + "/usr/share/" + BPN + "/images"
+ tar_image = dest_dir + "/" + image_name.replace('/', '.') + ".tar"
+ docker_ref = ":" + parm["tag"] if "tag" in parm else "latest"
+
+ bb.utils.remove(tar_image)
+ cmd = f"skopeo copy dir:{unpacked_image} " \
+ f"docker-archive:{tar_image}:{image_name}{docker_ref}"
+ bb.note(f"running: {cmd}")
+ bb.process.run(cmd)
+
+ cmd = f"{d.getVar('CONTAINER_COMPRESSOR_CMD')} {tar_image}"
+ bb.note(f"running: {cmd}")
+ bb.process.run(cmd)
+
+ line = f"{os.path.basename(tar_image)}.{d.getVar('CONTAINER_COMPRESSION')} " + \
+ image_name + docker_ref
+ bb.note(f"adding '{line}' to image.list")
+ image_list.write(line + "\n")
+
+ image_list.close()
+}
+
+addtask install_fetched_containers after do_install before do_prepare_build
+
+do_prepare_build:append() {
+ install -v -m 644 ${WORKDIR}/container-loader.service ${S}/debian/${BPN}.service
+}
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+# This software is a part of ISAR.
+# Copyright (c) Siemens AG, 2024
+#
+# SPDX-License-Identifier: MIT
+
+require container-loader.inc
+
+CONTAINER_ENGINE = "docker"
+
+CONTAINER_ENGINE_PACKAGES ?= "docker.io, apparmor"
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+[Unit]
+Description=Load archived container images on boot
+After=${CONTAINER_ENGINE}.service
+Requires=${CONTAINER_ENGINE}.service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/share/${BPN}/container-loader.sh
+RemainAfterExit=true
+
+[Install]
+WantedBy=multi-user.target
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+#!/bin/sh
+#
+# Copyright (c) Siemens AG, 2024
+#
+# SPDX-License-Identifier: MIT
+
+set -eu
+
+while read -r image ref; do
+ if [ -e /usr/share/${BPN}/images/"$image" ] && \
+ [ -z "$(${CONTAINER_ENGINE} images -q "$ref")" ]; then
+ ${CONTAINER_DECOMPRESSOR_CMD} /usr/share/${BPN}/images/"$image" | \
+ ${CONTAINER_ENGINE} load
+ if [ "${CONTAINER_DELETE_AFTER_LOAD}" = "1" ]; then
+ rm -f /usr/share/${BPN}/images/"$image"
+ fi
+ fi
+done < /usr/share/${BPN}/image.list
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+# This software is a part of ISAR.
+# Copyright (c) Siemens AG, 2024
+#
+# SPDX-License-Identifier: MIT
+
+require container-loader.inc
+
+CONTAINER_ENGINE = "podman"
+
+CONTAINER_ENGINE_PACKAGES ?= "podman"