# --- Build: Rust -> WASM
FROM rust:1-slim AS build
RUN rustup target add wasm32-unknown-unknown
WORKDIR /src
COPY Cargo.toml Cargo.lock ./
COPY .cargo .cargo
# build dependencies first (Docker layer cache)
RUN mkdir src && echo "fn main() {}" > src/main.rs \
 && cargo build --release --target wasm32-unknown-unknown \
 && rm -rf src
COPY assets assets
COPY lang lang
COPY src src
RUN touch src/main.rs && cargo build --release --target wasm32-unknown-unknown \
 && mkdir /out \
 && cp target/wasm32-unknown-unknown/release/dungeoncraft.wasm /out/ \
 && cp "$CARGO_HOME"/registry/src/*/macroquad-*/js/mq_js_bundle.js /out/

# --- serve: nginx
FROM nginx:alpine
COPY nginx.conf /etc/nginx/conf.d/default.conf
COPY www/ /usr/share/nginx/html/
COPY --from=build /out/ /usr/share/nginx/html/
EXPOSE 80