FROM rust:latest
ENV CARGO_HOME=/deps
ARG APP_NAME=rpn_rs
WORKDIR /work

deps:
	COPY ./Cargo.toml ./Cargo.lock .
	# This is a binary program, expose a main.rs file
	RUN mkdir src && touch src/main.rs
	RUN cargo fetch
	SAVE ARTIFACT /deps

rust-builder:
	RUN rustup target add x86_64-unknown-linux-musl
	RUN rustup target add x86_64-pc-windows-gnu
	RUN rustup target add i686-unknown-linux-musl
	RUN rustup target add aarch64-unknown-linux-musl
	RUN rustup target add arm-unknown-linux-musleabi
	RUN rustup target add armv7-unknown-linux-musleabi

	RUN apt-get update
	RUN DEBIAN_FRONTEND=noninteractive apt-get install -y gcc-arm-linux-gnueabi gcc-aarch64-linux-gnu gdb-mingw-w64 gcc-mingw-w64-x86-64

	SAVE IMAGE docker-wg:5000/rust-builder

build:
	FROM +rust-builder
	COPY . .
	COPY +deps/deps /deps

	ARG TOOLCHAIN

	RUN cargo build --release --target "$TOOLCHAIN"
	ARG STRIP_CMD
	RUN "$STRIP_CMD" "target/$TOOLCHAIN/release/$APP_NAME"
	RUN xz --keep "target/$TOOLCHAIN/release/$APP_NAME"
	SAVE ARTIFACT target/$TOOLCHAIN/release/$APP_NAME AS LOCAL target/$TOOLCHAIN/release/$APP_NAME-$TOOLCHAIN
	SAVE ARTIFACT target/$TOOLCHAIN/release/$APP_NAME.xz AS LOCAL target/$TOOLCHAIN/release/$APP_NAME-$TOOLCHAIN.xz

all:
	BUILD --build-arg TOOLCHAIN=x86_64-unknown-linux-musl    --build-arg STRIP_CMD=x86_64-linux-gnu-strip  +build
	BUILD --build-arg TOOLCHAIN=i686-unknown-linux-musl      --build-arg STRIP_CMD=x86_64-linux-gnu-strip  +build
	BUILD --build-arg TOOLCHAIN=aarch64-unknown-linux-musl   --build-arg STRIP_CMD=aarch64-linux-gnu-strip +build
	BUILD --build-arg TOOLCHAIN=arm-unknown-linux-musleabi   --build-arg STRIP_CMD=arm-linux-gnueabi-strip +build
	BUILD --build-arg TOOLCHAIN=armv7-unknown-linux-musleabi --build-arg STRIP_CMD=arm-linux-gnueabi-strip +build
	# TODO: Cross compile to windows
	# BUILD --build-arg TOOLCHAIN=x86_64-pc-windows-gnu +build