Merge branch 'compile-swift' into 'main'

See merge request vato007/protoc-docker!1

Dockerfile

@@ -1,3 +1,23 @@
+FROM vato.ddns.net:8083/debian:buster AS CGRPC_BUILDER
+
+ARG CGRPC_VERSION=v1.33.2
+
+RUN apt update -y && apt install git build-essential autoconf libtool pkg-config zlib1g-dev -y
+
+RUN git clone -b ${CGRPC_VERSION} --recursive https://github.com/grpc/grpc
+
+RUN cd grpc && make plugins -j 12
+
+FROM vato.ddns.net:8083/swift AS SWIFT_BUILDER
+
+ARG GRPC_SWIFT_VERSION=1.0.0-alpha.21
+
+RUN git clone -b ${GRPC_SWIFT_VERSION} https://github.com/grpc/grpc-swift.git grpc-swift
+
+COPY ./build_grpc_swift_plugins_static.sh grpc-swift/
+
+RUN cd grpc-swift && chmod +x build_grpc_swift_plugins_static.sh && ./build_grpc_swift_plugins_static.sh && rm -rf .build
+
 FROM vato.ddns.net:8083/alpine
 
 ARG ARCH=x86_64
@@ -21,4 +41,6 @@ RUN rm protoc-gen-grpc-web-*.sha256 && \
     mv protoc-gen-grpc-web-* /usr/bin/protoc-gen-grpc-web && \
     chmod +x /usr/bin/protoc-gen-grpc-web
 
-COPY ./protoc-gen-* /usr/bin/
+COPY --from=CGRPC_BUILDER /grpc/bins/opt/grpc_python_plugin /usr/bin/protoc-gen-grpc-python
+
+COPY --from=SWIFT_BUILDER /grpc-swift/protoc-gen-* /usr/bin/

README.md

@@ -1,7 +1,10 @@
 # Protoc Docker
 
 Docker container for generating protobuf code. Right now used in CI only for other projects.
+Smallish image size (~220mb); unfortunately the grpc-swift plugins cause it to blow out as they're statically linked (so don't need foundation or the swift dependencies).
+Not copying them across will save ~100mb in space.
 
 ## TODOS
 
-- Build the swift plugins inside this repo, rather than committing the built plugins
+- Build the grpc-web plugins in the dockerfile, rather than downloading built versions
+- Use CMake/Bazel for building the c grpc plugins - [CMake dockerfile](https://hub.docker.com/r/kitware/cmake)

build_grpc_swift_plugins_static.sh

@@ -0,0 +1,10 @@
+SWIFT_BUILD_PATH=./.build
+
+PROTOC_GEN_SWIFT=${SWIFT_BUILD_PATH}/release/protoc-gen-swift
+PROTOC_GEN_GRPC_SWIFT=${SWIFT_BUILD_PATH}/release/protoc-gen-grpc-swift
+
+MAIN_SCRIPT="swift build --configuration=release --build-path=${SWIFT_BUILD_PATH} -Xswiftc -static-executable"
+${MAIN_SCRIPT} --product protoc-gen-swift
+${MAIN_SCRIPT} --product protoc-gen-grpc-swift
+cp ${SWIFT_BUILD_PATH}/release/protoc-gen-swift .
+cp ${SWIFT_BUILD_PATH}/release/protoc-gen-grpc-swift .