Consistent x86_64/armv7/aarch64 builds for synit-pid1

packaging/Dockerfile.rust

@@ -0,0 +1,18 @@
+ARG ALPINE_ARCH
+ARG DOCKER_ARCH
+FROM --platform=linux/${DOCKER_ARCH} synit-build:${ALPINE_ARCH}
+
+ARG http_proxy
+# Running without proxy for now, to ensure reasonable freshness and consistency:
+#   RUN http_proxy=${http_proxy} https_proxy=${http_proxy} rustup-init -y --default-toolchain nightly
+#
+RUN rustup-init -y --default-toolchain nightly
+
+ARG BUILD_USER
+ENV PATH=/home/${BUILD_USER}/.cargo/bin:$PATH
+
+# Prime the crates.io index
+RUN cargo search --limit 0
+
+# Hack to workaround https://github.com/rust-lang/rust/issues/89626
+ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_RUSTFLAGS="-Zgcc-ld=lld"

packaging/Makefile

@@ -32,6 +32,15 @@ DOCKER_CMD=\
 		-v $(CURDIR)/distfiles:/var/cache/distfiles \
 		synit-build:$(ARCH)
 
+DOCKER_BUILD_ARGS=\
+	--build-arg http_proxy=$(HTTP_PROXY) \
+	--build-arg http_proxy_hostname=$(DOCKER_SQUID_IP) \
+	--build-arg ALPINE_ARCH=$(ARCH) \
+	--build-arg DOCKER_ARCH=$(DOCKER_ARCH) \
+	--build-arg KEYFILE=$(KEYFILE) \
+	--build-arg UID=$(UID) \
+	--build-arg BUILD_USER=$(BUILD_USER)
+
 build: build-image
 	$(DOCKER_CMD) make -f Makefile.internal $@ KEYFILE=$(KEYFILE)
 sign: build-image
@@ -55,16 +64,21 @@ build-image: .build-image.$(ARCH)
 .build-image.$(ARCH): $(KEYFILE)
 	docker buildx build \
 		--progress plain \
+		$(DOCKER_BUILD_ARGS) \
 		--platform=linux/$(DOCKER_ARCH) \
-		--build-arg http_proxy=$(HTTP_PROXY) \
-		--build-arg http_proxy_hostname=$(DOCKER_SQUID_IP) \
-		--build-arg DOCKER_ARCH=$(DOCKER_ARCH) \
-		--build-arg KEYFILE=$(KEYFILE) \
-		--build-arg UID=$(UID) \
-		--build-arg BUILD_USER=$(BUILD_USER) \
 		-t synit-build:$(ARCH) .
 	touch $@
 
+build-image.rust: .build-image.rust.$(ARCH)
+
+.build-image.rust.$(ARCH): .build-image.$(ARCH)
+	docker buildx build \
+		--progress plain \
+		$(DOCKER_BUILD_ARGS) \
+		--platform=linux/$(DOCKER_ARCH) \
+		-t synit-build-rust:$(ARCH) -f Dockerfile.rust .
+	touch $@
+
 keyfile: $(KEYFILE)
 
 $(KEYFILE):

packaging/packages/synit-pid1/.gitignore

@@ -0,0 +1 @@
+buildlog.*

packaging/packages/synit-pid1/APKBUILD

@@ -0,0 +1,30 @@
+# Contributor: Tony Garnock-Jones <tonyg@leastfixedpoint.com>
+# Maintainer: Tony Garnock-Jones <tonyg@leastfixedpoint.com>
+pkgname=synit-pid1
+pkgver=0.0.1
+pkgrel=0
+pkgdesc="synit pid 1 program"
+url="https://synit.org/"
+arch="all"
+license="GPLv3"
+depends=""
+makedepends=""
+source=""
+builddir="$srcdir/"
+options="!check"
+
+# This allows us to stomple on /sbin/init, which is owned by the busybox package
+replaces="busybox"
+
+build() {
+    pwd
+    ls -laR
+    false
+}
+
+package() {
+    :
+}
+
+sha512sums="
+"

packaging/packages/synit-pid1/sync-binaries.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+cd "$(dirname "$0")"
+
+set -e
+
+build() {
+    make -C ../../../synit-pid1 $1-binary-release 2>&1 | tee buildlog.$1
+    cp -p ../../../synit-pid1/target/$1-*/release/synit-pid1 synit-pid1.$1
+}
+
+build x86_64 &
+build armv7 &
+build aarch64 &
+wait

synit-pid1/Makefile

@@ -1,9 +1,20 @@
 all:
 	cargo build --all-targets
 
-arm-binary: arm-binary-release
+x86_64-binary: x86_64-binary-release
 
-arm-binary-release:
+x86_64-binary-release:
+	$(MAKE) -C ../packaging build-image.rust ARCH=x86_64
+	docker run -i --rm \
+		-v $(HOME)/.cargo:/home/build/.cargo \
+		-v `pwd`:/data \
+		-e CARGO_TARGET_DIR=target/x86_64-unknown-linux-musl \
+		synit-build-rust:x86_64 \
+		cargo build --release --all-targets
+
+armv7-binary: armv7-binary-release
+
+armv7-binary-release:
 	cross build --target=armv7-unknown-linux-musleabihf --release --all-targets
 
 # Hack to workaround https://github.com/rust-embedded/cross/issues/598