Apply local tweaks to a Gradle build if user.gradle is present

build.gradle

// here goes the conf

...

// append this

if (file('user.gradle').exists()) {
    apply from: 'user.gradle' // if a user file is present, tweak the build (add tasks, ...). This file should not be in VCS.
}

The idea is to allow users to add tasks, shortcuts, ... to the Groovy build, without having to commit the changes to VCS.

My user.gradle would contain things like this, for example:

// Add desktop notifications
apply plugin: 'announce'

gradle.afterProject {project, projectState ->
    if (projectState.failure) {
        announce.announce ("Evaluation of $project FAILED\n${projectState.failure}", 'local')
    }
}

gradle.addBuildListener(
   ['buildStarted': {},
    'projectsEvaluated': {},
    'projectsLoaded': {},
    'settingsEvaluated': {},
    'buildFinished': { BuildResult result ->
    if (result.failure) {
       announce.announce("Build FAILED with ${result.failure}", 'local')
        } else {
       announce.announce("Build SUCCESSFUL", 'local')
        }
   }] as BuildListener
)

gradle.taskGraph.afterTask { Task task, TaskState state ->
    if (state.failure) {
        announce.announce ("Task $task FAILED\n${state.failure}", 'local')
    }
}

// fast local install
task fastInstall(dependsOn: install) {
   description='Installs a non indy version of Groovy into local Maven repo, without docs nor sources'
   allprojects {
    [javadoc,groovydoc,javadocAll,groovydocAll,sourceJar, groovydocJar, javadocJar]*.enabled = false
   }
   rootProject.ext.skipIndy = true
}