FROM rust:latest
ENV CARGO_HOME=/deps
WORKDIR /work
RUN apt-get update
RUN apt-get install -y gcc-arm-linux-gnueabi gcc-aarch64-linux-gnu

deps:
	COPY ./Cargo.toml ./Cargo.lock .
	RUN mkdir src && touch src/main.rs
	RUN cargo fetch
	SAVE ARTIFACT /deps

build:
	ARG TOOLCHAIN
	RUN rustup target add $TOOLCHAIN
	SAVE IMAGE docker-wg:5000/rust-builder:$TOOLCHAIN

	COPY +deps/deps /deps
	COPY ./Cargo.toml ./Cargo.lock .
	COPY ./src/ ./src/
	RUN cargo build --release --target $TOOLCHAIN
	SAVE ARTIFACT target/$TOOLCHAIN/release/rpn_rs AS LOCAL target/$TOOLCHAIN/release/rpn_rs

all:
	BUILD --build-arg TOOLCHAIN=x86_64-unknown-linux-musl +build
	BUILD --build-arg TOOLCHAIN=i686-unknown-linux-musl +build
	# TODO: Cross compile
	# BUILD --build-arg TOOLCHAIN=aarch64-unknown-linux-musl +build
	# BUILD --build-arg TOOLCHAIN=arm-unknown-linux-musleabi +build
	# BUILD --build-arg TOOLCHAIN=armv7-unknown-linux-musleabi +build