Run Swift on Google Cloud Shell! Here are instructions for using OpenAPI Compiler to generate a Swift client and server for a REST API.

openapi-swift-cloud-shell.txt

# Run OpenAPI Compiler and Swift in Cloud Shell

# First use apt-get to install packages needed to run Swift
sudo apt-get update
sudo apt-get install -y clang clang-3.8 lldb-3.8 libicu-dev libtool libcurl4-openssl-dev libbsd-dev build-essential libssl-dev uuid-dev curl unzip

# Next create a ~/local directory for some tools that we'll download
cd
mkdir -p local

# Add $HOME/local/bin to your path by adding the following to your .bashrc 
#   export PATH=.:$HOME/local/bin:$PATH
# After you've done the above step, reload .bashrc
source ~/.bashrc

# Download and install Swift in ~/local
SWIFT_BRANCH=swift-3.0.2-release
SWIFT_VERSION=swift-3.0.2-RELEASE
SWIFT_PLATFORM=ubuntu14.04
SWIFT_URL=https://swift.org/builds/$SWIFT_BRANCH/$(echo "$SWIFT_PLATFORM" | tr -d .)/$SWIFT_VERSION/$SWIFT_VERSION-$SWIFT_PLATFORM.tar.gz
echo $SWIFT_URL
curl -fSsL $SWIFT_URL -o swift.tar.gz 
tar -xzf swift.tar.gz --strip-components=2 --directory=local

# Download and install the protocol buffer compiler in ~/local
PROTOC_URL=https://github.com/google/protobuf/releases/download/v3.2.0rc2/protoc-3.2.0rc2-linux-x86_64.zip
echo $PROTOC_URL
curl -fSsL $PROTOC_URL -o protoc.zip
unzip protoc.zip -d local

# Download and build OpenAPI Compiler (openapic)
go get github.com/googleapis/openapi-compiler/openapic

# Build the Swift code generator plugin
cd ~/gopath/src/github.com/googleapis/openapi-compiler/plugins/swift/openapi_swift_generator
make

# Generate and build the bookstore example
cd examples/bookstore
make

# Start the bookstore server
.build/debug/Server &

# Run the swift unit tests
swift test

# Open the web preview button and visit /shelves

hey timburks - nice walkthrough.

For the newbie (like me) it might be helpful to provide a link to the command edit short cuts for vi when editing the .bashrc