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README.md

Build Status

Swift gRPC

This repository contains an experimental Swift gRPC API and code generator.

It is intended for use with Apple's swift-protobuf support for Protocol Buffers. Both projects contain code generation plugins for protoc, Google's Protocol Buffer compiler, and both contain libraries of supporting code that is needed to build and run the generated code.

APIs and generated code is provided for both gRPC clients and servers, and can be built either with Xcode or the Swift Package Manager. Support is provided for all four gRPC API styles (Unary, Server Streaming, Client Streaming, and Bidirectional Streaming) and connections can be made either over secure (TLS) or insecure channels.

The Echo example provides a comprehensive demonstration of currently-supported features.

Swift Package Manager builds may also be made on Linux systems. Please see DOCKER.md and LINUX.md for details.

gRPC dependencies are vendored

Swift gRPC now includes vendored copies of the gRPC core library and BoringSSL, an OpenSSL fork that is used by the gRPC Core. These are built automatically in Swift Package Manager builds.

Building with Xcode

The top-level Makefile uses the Swift Package Manager to generate an Xcode project for the SwiftGRPC package:

$ make

Then open SwiftGRPC.xcodeproj in Xcode. Due to present limitations in Package Manager configuration, the libz dependency is not included in the generated Xcode project. If you get build errors about missing symbols such as _deflate, _deflateEnd, etc., you can fix them by adding libz.tbd to the Link Binary With Libraries build step of the CgRPC target.

Having build problems?

grpc-swift depends on Swift, Xcode, and swift-proto. We are currently testing with the following versions:

  • Xcode 8.2
  • Swift 3.0.2
  • swift-protobuf 0.9.24

License

grpc-swift is released under the same license as gRPC, repeated in LICENSE.

Contributing

Please get involved! See our guidelines for contributing.