FROM alpine:latest AS builder

ENV PATH "$PATH:/root/.cargo/bin"

# Switch to the nightly build
WORKDIR /usr/src/app

# Install build dependencies, install rustup & create dummy project
RUN apk update && apk add --no-cache openssl-dev build-base curl && \
    { curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly; } && \
    rustup target add x86_64-unknown-linux-musl

# Build the dependencies
# This is done separately to reduce average compile time
# Afterwards, we remove the dummy src directory
# Now, we build our own source code
COPY Cargo.toml Cargo.lock ./
COPY src/ ./src/
RUN cargo build --release --target x86_64-unknown-linux-musl


# Now, we create the actual image
FROM scratch

# Install dependencies
COPY --from=builder /usr/src/app/target/x86_64-unknown-linux-musl/release/rust-api /rust-api

CMD ["/rust-api"]