I&#39;m trying to pass an argument from command line to a java class.  I followed this post: http://gradle.1045684.n5.nabble.com/Gradle-application-plugin-question-td5539555.html but the code does not work for me (perhaps it is not meant for JavaExec?).  Here is what I tried:


    task listTests(type:JavaExec){
        main = &quot;util.TestGroupScanner&quot;
        classpath = sourceSets.util.runtimeClasspath
        // this works...
        args &#39;demo&#39;
        /*
        // this does not work!
        if (project.hasProperty(&quot;group&quot;)){
            args group
        }
        */
    }

The output from the above hard coded args value is:

    C:\ws\svn\sqe\sandbox\selenium2forbg\testgradle&gt;g listTests
    :compileUtilJava UP-TO-DATE
    :processUtilResources UP-TO-DATE
    :utilClasses UP-TO-DATE
    :listTests
    Received argument: demo
    
    BUILD SUCCESSFUL
    
    Total time: 13.422 secs

However, once I change the code to use the hasProperty section and pass &quot;demo&quot; as an argument on the command line, I get a NullPointerException:

    C:\ws\svn\sqe\sandbox\selenium2forbg\testgradle&gt;g listTests -Pgroup=demo -s
    
    FAILURE: Build failed with an exception.
    
    * Where:
    Build file &#39;C:\ws\svn\sqe\sandbox\selenium2forbg\testgradle\build.gradle&#39; line:25
    
    * What went wrong:
    A problem occurred evaluating root project &#39;testgradle&#39;.
    &gt; java.lang.NullPointerException (no error message)
    
    * Try:
    Run with --info or --debug option to get more log output.
    
    * Exception is:
    org.gradle.api.GradleScriptException: A problem occurred evaluating root project
     &#39;testgradle&#39;.
        at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:54)
        at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:127)
        at org.gradle.configuration.BuildScriptProcessor.evaluate(BuildScriptProcessor.java:38) 


There is a simple test project available at http://gradle.1045684.n5.nabble.com/file/n5709919/testgradle.zip that illustrates the problem.

This is using Gradle 1.0-rc-3.  The NullPointer is from this line of code:

    args group 

I added the following assignment before the task definition, but it didn&#39;t change the outcome:

    group = hasProperty(&#39;group&#39;) ? group : &#39;nosuchgroup&#39; 

Any pointers on how to pass command line arguments to gradle appreciated.

All Gradle Properties Solutions on Gang of Coders

Total of 1 Gradle Properties Solutions

How to pass arguments from command line to Gradle