build docker image with cargo chef cache (#309)

.github/workflows/build.yml

@@ -300,13 +300,17 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
       - name: Build Docker image
-        uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
+        uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56
         with:
           context: .
           push: false
           load: true
           tags: roapi:latest
+          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/roapi:buildcache
       - name: Test
         run: |
           docker run --rm roapi:latest --help
+          docker run --rm roapi:latest --version

.github/workflows/roapi_release.yml

@@ -279,3 +279,5 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=registry,ref=ghcr.io/${{ github.repository_owner }}/roapi:buildcache
+          cache-to: type=registry,ref=ghcr.io/${{ github.repository_owner }}/roapi:buildcache,mode=max

Dockerfile

@@ -1,18 +1,51 @@
-FROM instrumentisto/rust:nightly-bullseye-2023-09-15 AS builder
-WORKDIR /roapi_src
-COPY ./ /roapi_src
+ARG RUST_VER=nightly-bullseye-2023-09-15
+ARG RUSTFLAGS='-C target-cpu=skylake'
+ARG FEATURES="simd,database"
+
+# Step 0: Install cargo-chef
+FROM instrumentisto/rust:${RUST_VER} AS chef
+# We only pay the installation cost once,
+# it will be cached from the second build onwards
+RUN cargo +nightly install cargo-chef
+# install cmake for snmalloc
 RUN apt-get update \
     && apt-get install --no-install-recommends -y cmake
 
-RUN RUSTFLAGS='-C target-cpu=skylake' \
-    cargo +nightly install --locked --bins roapi --features "simd database" --path roapi
+# Step 1: Compute a recipe file
+FROM chef AS planner
+WORKDIR /roapi_src
+COPY . .
+RUN cargo chef prepare --recipe-path recipe.json
 
+# Step 2: Cache project dependencies
+FROM chef AS cacher
+ARG RUSTFLAGS
+ARG FEATURES
+WORKDIR /roapi_src
+COPY --from=planner /roapi_src/recipe.json recipe.json
+RUN RUSTFLAGS=${RUSTFLAGS} \
+    cargo +nightly chef cook --features ${FEATURES} --release --recipe-path recipe.json
+
+# Step 3: Build the release binary
+FROM chef AS builder
+ARG RUSTFLAGS
+ARG FEATURES
+WORKDIR /roapi_src
+COPY ./ /roapi_src
+COPY --from=cacher /roapi_src/target target
+COPY --from=cacher /usr/local/cargo /usr/local/cargo
+RUN RUSTFLAGS=${RUSTFLAGS} \
+    cargo +nightly build --release --locked --bin roapi --features ${FEATURES}
+
+# Step 4: Assemble the final image
 FROM debian:bullseye-slim
 LABEL org.opencontainers.image.source https://github.com/roapi/roapi
 
-RUN apt-get update && apt-get install -y libssl-dev ca-certificates && rm -rf /var/lib/apt/lists/*
+RUN apt-get update \
+    && apt-get install -y libssl-dev ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
 COPY test_data /test_data
-COPY --from=builder /usr/local/cargo/bin/roapi /usr/local/bin/roapi
+COPY --from=builder /roapi_src/target/release/roapi /usr/local/bin/roapi
 
 EXPOSE 8080
 ENTRYPOINT ["roapi"]