Added make download-packages

makefile

@@ -3,6 +3,26 @@ export
 
 TAG ?= dev
 
+define fetch_if_missing
+	@if [ ! -f "$1" ]; then \
+		echo "Downloading $1"; \
+		curl -L -o "$1" "$2"; \
+	fi
+endef
+
+ALPINE_SERIES := $(word 1,$(subst ., ,${ALPINE_VER})).$(word 2,$(subst ., ,${ALPINE_VER}))
+
+download-packages:
+	@mkdir -p packages
+
+	$(call fetch_if_missing,packages/busybox-${BUSYBOX_VERSION}.tar.gz,https://github.com/mirror/busybox/archive/refs/tags/${BUSYBOX_VERSION}.tar.gz)
+
+	$(call fetch_if_missing,packages/alpine-minirootfs-${ALPINE_VER}-${ALPINE_ARCH}.tar.gz,https://dl-cdn.alpinelinux.org/alpine/v$(ALPINE_SERIES)/releases/${ALPINE_ARCH}/alpine-minirootfs-${ALPINE_VER}-${ALPINE_ARCH}.tar.gz)
+
+	$(call fetch_if_missing,packages/${NXP_VERSION}.tar.gz,https://github.com/nxp-qoriq/linux/archive/refs/tags/${NXP_VERSION}.tar.gz)
+
+	$(call fetch_if_missing,packages/${CRIO_VERSION}.tar.gz,https://storage.googleapis.com/cri-o/artifacts/${CRIO_VERSION}.tar.gz)
+
 build-base:
 	docker build \
 	-f docker/build-base.Dockerfile \
@@ -47,6 +67,7 @@ buildenv-alpine: build-base
 		--build-arg TAG=$(TAG) \
 		--build-arg ALPINE_ARCH=$(ALPINE_ARCH) \
 		--build-arg ALPINE_VER=$(ALPINE_VER) \
+		--build-arg CRIO_VERSION=$(CRIO_VERSION) \
 	-t $(DOCKER_IMAGE_ROOT)/buildenv-alpine:$(TAG) .
 
 alpine-rootfs: buildenv-alpine kernel-build
@@ -55,5 +76,6 @@ alpine-rootfs: buildenv-alpine kernel-build
 		-v /cache/apk:/var/cache/apk \
 		-v /cache/artifacts:/artifacts \
 		-e ROOTFS=/out/rootfs \
+		-e ARTIFACT_DIR=/artifacts \
 		$(DOCKER_IMAGE_ROOT)/buildenv-alpine:$(TAG) \
 		bash -lc '/build-rootfs.sh'