FROM docker.io/library/rust AS builder

ARG BUILD_MODE=debug

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

WORKDIR /app

COPY Cargo.toml Cargo.lock ./
RUN mkdir src && echo "fn main() {}" > src/main.rs
RUN cargo fetch
RUN rm -rf src

COPY src ./src

RUN cargo build --target=x86_64-unknown-linux-musl $(if [ "$BUILD_MODE" = "release" ]; then echo "--release"; else echo ""; fi)
RUN mkdir -p build && cp target/x86_64-unknown-linux-musl/$(if [ "$BUILD_MODE" = "release" ]; then echo "release"; else echo "debug"; fi)/glyph build/glyph

FROM docker.io/library/alpine

COPY --from=builder /app/build/glyph /usr/local/bin/glyph

EXPOSE 8080/tcp

ENTRYPOINT ["/usr/local/bin/glyph"]
CMD ["--help"]