Why?

Picture is worth a thousand words they say. They also wonder why their gradle multimodule build takes so long.

How?

Follow instructions from gradle plugin portal entry to add plugin, ie either:

plugins {
  id "rpost.grantt" version "0.3"
}

or:

buildscript {
  repositories {
    maven {
      url "https://plugins.gradle.org/m2/"
    }
  }
  dependencies {
    classpath "gradle.plugin.rpost:grantt:0.3"
  }
}

apply plugin: "rpost.grantt"

and run your build.

What?

Open build/gantt.html. Expect something similiar to this