##
# BUILD STAGE
#############
FROM ekidd/rust-musl-builder:latest AS builder

ENV RUSTFLAGS="-C target-cpu=native"

# If we want to cache only the dependencies, we currently need to build twice -
# once just for dependencies and once for everything after copying.
COPY --chown=rust:rust Cargo.* ./
RUN mkdir src/
RUN echo 'fn main() {println!("dummy build for dependencies")}' > src/main.rs
RUN cargo build --release

# Remove the keepass-diff files of the dummy build
RUN rm -f target/x86_64-unknown-linux-musl/release/deps/keepass_diff-*

# Now run the real build after adding the real sources. The above lines are just
# for allowing better caching
COPY --chown=rust:rust src ./src
RUN cargo build --release

##
# RUN STAGE
#############
FROM scratch
WORKDIR /app
COPY --from=builder /home/rust/src/target/x86_64-unknown-linux-musl/release/keepass-diff /usr/local/bin/
ENTRYPOINT [ "/usr/local/bin/keepass-diff" ]