Gradle tasks definition

Question

These three forms to define a task in build.gradle seem identical. All of them call org.gradle.api.internal.project.DefaultProject#task(java.lang.String, groovy.lang.Closure), but really I can't understand how the second and the third one can work.

def myAction = {t -> println "${t.name} [${t.class.name}]"}

task('myTaskA') {task ->
    group = 'MyTasks'
    description = name
    doLast myAction
}

task myTaskB {task ->
    group = 'MyTasks'
    description = name
    doLast myAction
}

task myTaskC() {task ->
    group = 'MyTasks'
    description = name
    doLast myAction
}

It is also worth mentioning that all these forms are discouraged. The recommended way to define a custom task is `tasks.register("myTask") { ... }`, which also doesn't look as magical as the older forms. — Bjørn Vester, Aug 15 '22 at 08:09
Does this answer your question? [Understanding the groovy syntax in a gradle task definition](https://stackoverflow.com/questions/27584463/understanding-the-groovy-syntax-in-a-gradle-task-definition) — Jeff Scott Brown, Aug 15 '22 at 12:50
@BjørnVester - where (link/resource) did you get the information from that tasks.register("..."){...} is recommended and the other task definition forms are discouraged? — becke-ch, Nov 28 '22 at 21:20

score 0 · Answer 1 · answered Nov 29 '22 at 06:40

Task Configuration Avoidance: As of Gradle 5.1, it is recommend that the configuration avoidance APIs are used whenever tasks are created by custom plugins. The Configuration Avoidance API will co-exists with the existing APIs that will be replaced with the usual deprecation process over several major releases. In a nutshell, the API allows builds to avoid the cost of creating and configuring tasks during Gradle’s configuration phase when those tasks will never be executed, which can have a significant impact on total configuration time.

Instead of: “task ... {…}”, “task ... << {…}”, “task('...') {…}”, etc. use “tasks.register('...') {…}” API.

Gradle tasks definition

1 Answers1

Linked