Enables docker cross compilation to arm64

.github/workflows/artifacts.yml

@@ -286,6 +286,7 @@ jobs:
         with:
           context: .
           file: server/Dockerfile
+          platforms: linux/amd64,linux/arm64
           pull: true
           push: true
           tags: ${{ steps.docker_meta.outputs.tags }}

server/Dockerfile

@@ -1,11 +1,25 @@
-FROM rust:1-bullseye as builder
+FROM --platform=$BUILDPLATFORM rust:1-bullseye as builder
+ARG BUILDARCH TARGETARCH
 RUN apt-get update && \
-    apt-get install -y libclang-dev clang
+    apt-get install -y libclang-dev clang && \
+    if [ "$BUILDARCH" != "$TARGETARCH" ] && [ "$TARGETARCH" = "arm64" ] ; \
+    then \
+        apt-get install -y g++-aarch64-linux-gnu && \
+        rustup target add aarch64-unknown-linux-gnu ; \
+    fi
 COPY . /oxigraph
 WORKDIR /oxigraph/server
-RUN cargo build --release
+RUN if [ "$BUILDARCH" != "$TARGETARCH" ] && [ "$TARGETARCH" = "arm64" ] ; \
+    then \
+        export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc && \
+        export BINDGEN_EXTRA_CLANG_ARGS="--sysroot /usr/aarch64-linux-gnu" && \
+        cargo build --release --target aarch64-unknown-linux-gnu && \
+        mv /oxigraph/target/aarch64-unknown-linux-gnu/release/oxigraph_server /oxigraph/target/release/oxigraph_server ; \
+    else \
+        cargo build --release ; \
+    fi
 
-FROM gcr.io/distroless/cc-debian11
+FROM --platform=$TARGETPLATFORM gcr.io/distroless/cc-debian11
 COPY --from=builder /oxigraph/target/release/oxigraph_server /usr/local/bin/oxigraph_server
 ENTRYPOINT [ "/usr/local/bin/oxigraph_server" ]
 CMD [ "serve", "--location", "/data", "--bind", "0.0.0.0:7878" ]