Xtend 2 Java 2 Objective C (2 Swift?)

This project is a demo on how to transpile to Obj C from Xtend.

How to get this project up and running

In a (tmux) terminal:

Prepare j2objc-gradle

0. Install brew
1. First, install java jdk 1.7: brew tap caskroom/versions ; brew cask install caskroom/versions/java7, otherwise you will get a café babe. Caveat: Do not run the install-osx-jdk7.sh script unless you want to lose all your JDKs.
2. Install jenv and add your jdk environments to jenv: brew install jenv ; find /Library/Java/JavaVirtualMachines -name 'Home' -exec jenv add {} \;
3. Build the jenv shell 1.7 ; cd j2objc-gradle ; ./gradlew clean build
4. Prepare the project itself, setup 'local.properties' for j2objc: cd xtendAllPlatforms ; ./run-me-first

Prepare Xtendroid

0. Be consistent and build with jdk 1.7: jenv shell 1.7
1. Determine the development branch on Xtendroid: cd Xtendroid ; git branch --all
2. Change to the development branch: git checkout $(git branch --all | egrep -o "v[0-9]+\.[0-9]+_development")

Workflow

0. Be consistent and build with jdk 1.7: jenv shell 1.7
1. Import ':xtendshared' into your IDE (intellij / Android Studio), work from there as usual; ':xtendshared' has its own gradle rootProject, because ':xtendshared' requires gradle-2.10, and j2objc-gradle requires gradle-2.3.
2. Run gradle wrapper to generate a gradlew file
3. Every time ':xtendshared' is built (./gradlew build), the java files will be copied to the ':shared' project, ':xtendapp' can also make ':xtendshared' start building
4. The same applies to ./gradlew cAT, these will be transpiled to Objective C as well
5. Transpiling to j2objc, requires you run (./gradlew build j2objcBuild) in the directory xtendAllPlatforms

Roadmap

• Create a task that determines the xtend code's package name, then obliterates ':shared' copy of the java files depending on that package name
• Write a wiki quote apps in XCode (swift) and Android Studio (>2.0.0 alpha) that uses the :shared project, just like the wikiquotes-api project.
• Eliminate dead code, with proguard and j2objc
• When j2obcj-gradle finally upgrades to >gradle-2.8, then we can merge the Xtendroid part

Handy things to know

• Forget about URI.Builder, also forget UrlBuilder, roll your own
• Run unit tests with xtendAllPlatforms> ./gradlew cleanTest test and if you're confident ./gradlew build
• Transpile from Xtend to java with xtendshared> ./gradlew build cAT, which triggers the copy actions
• HttpUrlConnection is very broken when cast to a java.net.ssl.HttpsUrlConnection, IosHttpsUrlConnection seems to be promising, must do additional testing on j2objc-1.0.1.