Gradle task - pass arguments to Java application

I have a Java application that runs with a custom gradle task and the application requires some arguments upon being invoked. These are:

programName ( string | -f filename | -d key | -h)
Options:
    string         Message to be used.
    -d key         Use default messages, key must be s[hort], m[edium] or l[ong].
    -f filename    Use specified file as input.
    -h             Help dialog.

Gradle task looks like:

task run (type: JavaExec){
    description = "Secure algorythm testing"
    main = 'main.Test'
    classpath = sourceSets.main.runtimeClasspath
}

I've tried running gradle run -h and it does not work.

Solution 1:

Gradle 4.9+

gradle run --args='arg1 arg2'

This assumes your build.gradle is configured with the Application plugin. Your build.gradle should look similar to this:

plugins {
  // Implicitly applies Java plugin
  id: 'application'
}

application {
  // URI of your main class/application's entry point (required)
  mainClassName = 'org.gradle.sample.Main'
}

Pre-Gradle 4.9

Include the following in your build.gradle:

run {
    if (project.hasProperty("appArgs")) {
        args Eval.me(appArgs)
    }
}

Then to run: gradle run -PappArgs="['arg1', 'args2']"

Solution 2:

Since Gradle 4.9, the command line arguments can be passed with --args. For example, if you want to launch the application with command line arguments foo --bar, you can use

gradle run --args='foo --bar'

See Also Gradle Application Plugin

How to upgrade Gradle wrapper

Solution 3:

If you want to use the same set of arguments all the time, the following is all you need.

run {
    args = ["--myarg1", "--myarg2"]
}

Solution 4:

Sorry for answering so late.

I figured an answer alike to @xlm 's:

task run (type: JavaExec, dependsOn: classes){
    if(project.hasProperty('myargs')){
        args(myargs.split(','))
    }
    description = "Secure algorythm testing"
    main = "main.Test"
    classpath = sourceSets.main.runtimeClasspath
}

And invoke like:

gradle run -Pmyargs=-d,s