rust.Dockerfile

FROM rust:slim AS builder

WORKDIR /src/builder

ARG TARGETARCH
RUN if [ $TARGETARCH = "amd64" ]; then \
        echo "x86_64" > /tmp/arch; \
    elif [ $TARGETARCH = "arm64" ]; then \
        echo "aarch64" > /tmp/arch; \
    else \
        echo "Unsupported platform"; \
        exit 1; \
    fi

RUN apt-get update && apt-get install -y musl-tools
RUN rustup target add x86_64-unknown-linux-musl

COPY . .
RUN --mount=type=cache,target=/src/builder/target/ cargo build --target=$(cat /tmp/arch)-unknown-linux-musl --release && \
  cp target/$(cat /tmp/arch)-unknown-linux-musl/release/hello /tmp/hello

FROM scratch

WORKDIR /src/app

COPY --from=builder /tmp/hello .

CMD ["./hello"]

FROM rust:slim AS builder

WORKDIR /src/builder

RUN apt-get update && apt-get install -y musl-tools
RUN rustup target add x86_64-unknown-linux-musl

COPY . .
RUN --mount=type=cache,target=/src/builder/target/ cargo build --target=x86_64-unknown-linux-musl --release && \
  cp target/x86_64-unknown-linux-musl/release/musicbot /tmp/musicbot

FROM scratch

WORKDIR /src/app

COPY --from=builder /tmp/musicbot .

CMD ["./musicbot"]