public-gradle-tutorial

1. setup

Run ./gradlew to set up gradle. You just have to have java installed. gradle init initialises a gradle setup. This requires gradle is installed.

2. list all tasks available

You can list tasks with: ./gradlew tasks --all

Most editors have support for running tasks, and showing tasks.

3. creating tasks can be done with: tasks.register()

like:

tasks.register("sayHelloWorld") {
    doFirst {
        logger.info("Hello world!")
    }
}

4. copy files

Copying files can be done with the task: ./gradlew copyTaskSample

Here is a sample of a copy task:

tasks.register<Copy>("copyTaskSample") {
    doFirst {
        logger.info("copyTaskSample started!")
    }
    from("file.txt")
    into("build")
    doLast {
        logger.info("Finished copying")
    }
}

This is in build.gradle.kts, and you can see the task with ./gradlew tasks --all.

5. dependency on other tasks can normally be done with either: depends_on

Here is an example:

tasks.getByName("readJSONFile") { dependsOn("sleepTask") } 

6. reading a JSON file

To read a json file see task: ./gradlew readJSONFile

7. run groovy scripts

8. run tasks in parallel