guestfs native arm64

Signed-off-by: Avi Deitcher <avi@deitcher.net>

tools/guestfs/Dockerfile

@@ -1,4 +1,21 @@
-FROM debian:stretch
+FROM debian:bullseye-slim as base
+
+ARG TARGETARCH
 
 ENV DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get -yq upgrade && apt-get install -yq libguestfs-tools syslinux linux-image-amd64 vim
+
+FROM base as syslinux-amd64
+# syslinux package is only available on amd64; for arm64, use
+# the limited subset of syslinux-common
+ENV SYSLINUX="syslinux"
+
+FROM base as syslinux-arm64
+ENV SYSLINUX_arm64="syslinux-common"
+
+FROM syslinux-${TARGETARCH} as syslinux
+RUN apt-get update && \
+    apt-get -yq upgrade && \
+    apt-get install -yq libguestfs-tools \
+        ${SYSLINUX} \
+        linux-image-${TARGETARCH} \
+        vim

tools/guestfs/Makefile

@@ -1,27 +0,0 @@
-.PHONY: build push
-
-IMAGE=guestfs
-
-default: push
-
-iid: Dockerfile
-	tar cf - $^ | docker build --no-cache --iidfile iid -
-
-hash: Makefile iid
-	docker run --rm $(shell cat iid) sh -c 'apt list --installed 2>/dev/null | sha1sum' | sed 's/ .*//' > hash
-
-push: hash iid
-	docker pull linuxkit/$(IMAGE):$(shell cat hash) || \
-		(docker tag $(shell cat iid) linuxkit/$(IMAGE):$(shell cat hash) && \
-		 docker push linuxkit/$(IMAGE):$(shell cat hash))
-	rm -f iid
-
-build: hash iid
-	docker pull linuxkit/$(IMAGE):$(shell cat hash) || \
-		docker tag $(shell cat iid) linuxkit/$(IMAGE):$(shell cat hash)
-	rm -f iid
-
-clean:
-	rm -f hash iid
-
-.DELETE_ON_ERROR:

tools/guestfs/build.yml

@@ -0,0 +1,5 @@
+image: guestfs
+network: true
+arches:
+  - arm64
+  - amd64