Add gateway to snapshot builds in CI

.github/workflows/snapshot-build.yml

@@ -33,6 +33,9 @@ jobs:
           - image: node
             base-artifact: subspace-node
             upload-executables: true
+          - image: gateway
+            base-artifact: subspace-gateway
+            upload-executables: false
           - image: bootstrap-node
             base-artifact: subspace-bootstrap-node
             upload-executables: false
@@ -104,7 +107,6 @@ jobs:
           cd executables
           IMAGE="${{ fromJSON(steps.meta.outputs.json).tags[0] }}"
           ARTIFACT="${{ matrix.build.base-artifact }}"
-          
           docker run --rm --platform linux/amd64 --entrypoint /bin/cat $IMAGE /$ARTIFACT > $ARTIFACT-ubuntu-x86_64-skylake-${{ github.ref_name }}
           # TODO: Pull is a workaround for https://github.com/moby/moby/issues/48197#issuecomment-2472265028
           docker pull --platform linux/amd64/v2 $IMAGE

docker/gateway.Dockerfile

@@ -0,0 +1,109 @@
+# This Dockerfile supports both native building and cross-compilation to x86-64, aarch64 and riscv64
+FROM --platform=$BUILDPLATFORM ubuntu:22.04
+
+ARG RUSTC_VERSION=nightly-2024-10-22
+ARG PROFILE=production
+ARG RUSTFLAGS
+# Incremental compilation here isn't helpful
+ENV CARGO_INCREMENTAL=0
+ENV PKG_CONFIG_ALLOW_CROSS=true
+
+ARG BUILDARCH
+ARG TARGETARCH
+
+WORKDIR /code
+
+RUN \
+    apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+        ca-certificates \
+        protobuf-compiler \
+        curl \
+        git \
+        llvm \
+        clang \
+        automake \
+        libtool \
+        pkg-config \
+        make
+
+RUN \
+    if [ $BUILDARCH != "arm64" ] && [ $TARGETARCH = "arm64" ]; then \
+      DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+          g++-aarch64-linux-gnu \
+          gcc-aarch64-linux-gnu \
+          libc6-dev-arm64-cross \
+    ; fi
+
+RUN \
+    if [ $BUILDARCH != "riscv64" ] && [ $TARGETARCH = "riscv64" ]; then \
+      DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+          g++-riscv64-linux-gnu \
+          gcc-riscv64-linux-gnu \
+          libc6-dev-riscv64-cross \
+    ; fi
+
+RUN \
+    if [ $BUILDARCH != "amd64" ] && [ $TARGETARCH = "amd64" ]; then \
+      DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+          g++-x86-64-linux-gnu \
+          gcc-x86-64-linux-gnu \
+          libc6-dev-amd64-cross \
+    ; fi
+
+RUN \
+    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain $RUSTC_VERSION && \
+    /root/.cargo/bin/rustup target add wasm32-unknown-unknown
+
+COPY Cargo.lock /code/Cargo.lock
+COPY Cargo.toml /code/Cargo.toml
+COPY rust-toolchain.toml /code/rust-toolchain.toml
+
+COPY crates /code/crates
+COPY domains /code/domains
+COPY shared /code/shared
+COPY test /code/test
+
+# Up until this line all Rust images in this repo should be the same to share the same layers
+
+ARG TARGETVARIANT
+
+RUN \
+    if [ $BUILDARCH != "arm64" ] && [ $TARGETARCH = "arm64" ]; then \
+      export RUSTFLAGS="$RUSTFLAGS -C linker=aarch64-linux-gnu-gcc" \
+    ; fi && \
+    if [ $BUILDARCH != "riscv64" ] && [ $TARGETARCH = "riscv64" ]; then \
+      export RUSTFLAGS="$RUSTFLAGS -C linker=riscv64-linux-gnu-gcc" \
+    ; fi && \
+    if [ $TARGETARCH = "amd64" ] && [ "$RUSTFLAGS" = "" ]; then \
+      case "$TARGETVARIANT" in \
+        # x86-64-v2 with AES-NI
+        "v2") export RUSTFLAGS="-C target-cpu=x86-64-v2" ;; \
+        # x86-64-v3 with AES-NI
+        "v3") export RUSTFLAGS="-C target-cpu=x86-64-v3 -C target-feature=+aes" ;; \
+        # v4 is compiled for Zen 4+
+        "v4") export RUSTFLAGS="-C target-cpu=znver4" ;; \
+        # Default build is for Skylake
+        *) export RUSTFLAGS="-C target-cpu=skylake" ;; \
+      esac \
+    ; fi && \
+    if [ $BUILDARCH != "amd64" ] && [ $TARGETARCH = "amd64" ]; then \
+      export RUSTFLAGS="$RUSTFLAGS -C linker=x86_64-linux-gnu-gcc" \
+    ; fi && \
+    RUSTC_TARGET_ARCH=$(echo $TARGETARCH | sed "s/amd64/x86_64/g" | sed "s/arm64/aarch64/g" | sed "s/riscv64/riscv64gc/g") && \
+    /root/.cargo/bin/cargo -Zgitoxide -Zgit build \
+        --locked \
+        -Z build-std \
+        --profile $PROFILE \
+        --bin subspace-gateway \
+        --target $RUSTC_TARGET_ARCH-unknown-linux-gnu && \
+    mv target/*/*/subspace-gateway subspace-gateway && \
+    rm -rf target
+
+FROM ubuntu:22.04
+
+COPY --from=0 /code/subspace-gateway /subspace-gateway
+
+USER nobody:nogroup
+
+ENTRYPOINT ["/subspace-gateway"]

docker/gateway.Dockerfile.dockerignore

@@ -0,0 +1,9 @@
+*
+!/crates
+!/domains
+!/orml
+!/shared
+!/test
+!/Cargo.lock
+!/Cargo.toml
+!/rust-toolchain.toml