Appendix G. Working with DL4J from Source

Some developers might choose to build custom extensions, modify the core of DL4J, or work from the latest codebase. For those practitioners, we provide the instructions here on how to get DL4J set up directly from source.

GitHub is a web-based revision control system, and the de facto host for most open source projects. If you’re planning to contribute to the ND4J or DL4J projects by fixing bugs and committing code, you will need Git and GitHub.

Do You Really Need to Work from Source?

If you plan to simply use the code base, you do not need to install GitHub, and thus you should avoid downloading the source code.

Verifying Git Is Installed

To verify that Git is installed and working, type the following into the command line:

git --version

If the command returns an error, we suggest installing Git. If you do not already have a GitHub account we suggest signing up for one; it’s free and simple to do.

Cloning Key DL4J GitHub Projects

To work with source, clone ND4J, or DL4J, type the following commands into the console:

git clone https://github.com/deeplearning4j/nd4j 
git clone https://github.com/deeplearning4j/datavec
git clone https://github.com/deeplearning4j/deeplearning4j

You might also want to clone the DL4J examples so that they can work with ND4J or DL4J’s prebuilt samples (the version will vary):

git clone https://github.com/deeplearning4j/dl4j-0.4-examples 

More Examples Help

For a walkthrough of installing our examples ...

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