# ------------------ Chef stage -------------------

# Use cargo chef to cache dependencies

FROM rustlang/rust:nightly AS chef

# Install cargo chef

RUN cargo install cargo-chef

# Work in app

WORKDIR /app

# ------------------ Planner stage -------------------

FROM chef as planner

# Copy files into container

COPY . .

# Create a lockfile for cargo chef

RUN cargo +nightly chef prepare --recipe-path recipe.json

# ------------------ Builder stage -------------------

FROM chef AS builder

# Copy over our lock file

COPY --from=planner /app/recipe.json recipe.json

# Build dependencies - not the app

RUN cargo chef cook --release --recipe-path recipe.json

### Above this all dependencies should be cached as long as our lock file stays the same

COPY . .

# Build binary

RUN cargo build --release

# ------------------ Runtime stage -------------------

# Using super lightweight debian image to reduce overhead

FROM debian:bullseye-slim AS runtime

WORKDIR /app

# Copy prebuild bin from the Builder stage

COPY --from=builder /app/target/release/huffc /usr/local/bin/huffc

# Run bin which has been copied from the builder stage :)

ENTRYPOINT [ "/bin/sh", "-c" ]