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Overview

Since GATK 3.0, we use Apache Maven (instead of Ant) as our build system, and IntelliJ as our IDE (Integrated Development Environment). This document describes how to get set up to use Maven as well as how to create an IntelliJ project around our Maven project structure.

Before you start

  • Ensure that you have git clones of our repositories on your machine. See this document for details on obtaining the GATK source code from our Git repos.

Setting up Maven

  1. Check whether you can run mvn --version on your machine. If you can't, install Maven from here.

  2. Ensure that the JAVA_HOME environment variable is properly set. If it's not, add the appropriate line to your shell's startup file:

    for tcsh:

    setenv JAVA_HOME  \`/usr/libexec/java_home\`
    

    for bash:

    export JAVA_HOME=\`/usr/libexec/java_home\`
    

Note that the commands above use backticks, not single quotes.

Basic Maven usage

  1. To compile everything, type:

    mvn verify
    
  2. To compile the GATK but not Queue (much faster!), the command is:

    mvn verify -P\!queue
    

    Note that the ! needs to be escaped with a backslash to avoid interpretation by the shell.

  3. To obtain a clean working directory, type:

    mvn clean
    
  4. If you're used to using ant to compile the GATK, you should be able to feed your old ant commands to the ant-bridge.sh script in the root directory. For example:

    ./ant-bridge.sh test -Dsingle=MyTestClass
    

Setting up IntelliJ

  1. Run mvn test-compile in your git clone's root directory.

  2. Open IntelliJ

  3. File -> import project, select your git clone directory, then click ok

  4. On the next screen, select "import project from external model", then "maven", then click "next"

  5. Click "next" on the next screen without changing any defaults -- in particular:

    • DON'T check "Import maven projects automatically"
    • DON'T check "Create module groups for multi-module maven projects"
  6. On the "Select Profiles" screen, make sure private and protected are NOT checked, then click next.

  7. On the next screen, the "sting-aggregator" project should already be checked for you -- if not, then check it. Click next.

  8. Select the 1.7 SDK, then click next.

  9. Select an appropriate project name (can be anything), then click next.

  10. Click "Finish" to create the new IntelliJ project.

  11. That's it! Due to Maven magic, everything else will be set up for you automatically, including modules, libraries, Scala facets, etc.

  12. You will see a popup "Maven projects need to be imported" on every IntelliJ startup. You should click import unless you're working on the actual pom files that make up the build system.

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