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• Install Java Development Kit 7 or 8. Make sure that $JAVA_HOME points to it.
• Install Maven 3 or newer. Make sure that mvn is in your $PATH and $M2_HOME points to its installation.
• Install Protocol Buffers Compiler (protoc) 2.5 Make sure that protoc is in your PATH. Note: You need to install version 2.5. Newer versions won't work.
• For C# support:
  • Install Visual Studio 2013. Any edition will do, most REEF developers use the free Community Edition.
  • Setup your environment to point to that installation. You can do that by either using the Developer Command Line or in PowerShell following these instructions.

With these requirements met, the instructions below should work regardless of OS choice and command line interpreter . On Windows, you might find this tutorial helpful in setting up PowerShell with Maven, GitHub and Java. You will still have to install the Protocol Buffers Compiler, though.   

Cloning the repository

Committers

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$ git clone git://git.apache.org/incubator-reef.git

Compiling

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Java Code only

REEF is built using Maven. Hence, a simple 

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This runs one thread per core (-TC1) and skips the tests (-DskipTests)

Java and .NET

The whole build is triggered via Maven:

mvn -PBridge -PDotNet clean install

Or, without tests:

mvn -TC1 -PBridge -PDotNet -DskipTests clean install

Note: You will see many exception printouts during the compilation of REEF with tests. Those are not, in fact, problems with the build: REEF guarantees that exceptions thrown on remote machines get serialized and shipped back to the Driver. We have extensive unit tests for that feature that produce the confusing printouts.