Gradle basic

1. execute default file (build.gradle)

gradlew

2. execute another file

gradlew -b [filename]

3.  basic task

task ta {
    println "from task ta"
}

another way to define task

task tc
tc.doLast{println "from task tc"}

4. task with left shift

will not be execute like this

gradlew

only execute when call task name

gradlew ta

task ta <<{
    println "from task ta"
}

equal to

task ta {
    doLast {
        println "from task ta"
    }
}

5. dependsOn

do before the task

task putOnSocks {
    doLast {
        println "Putting on Socks."
    }
}
 
task putOnShoes {
    dependsOn "putOnSocks"
    doLast {
        println "Putting on Shoes."
    }
}

6. finalizedBy

do after the task

task eatBreakfast {
    finalizedBy "brushYourTeeth"
    doLast{
        println "Om nom nom breakfast!"
    }
}
 
task brushYourTeeth {
    doLast {
        println "Brushie Brushie Brushie."
    }
}

7. copy task

task copyJpegs(type: Copy) {
    from 'images'
    include '*.jpg'
    into 'build'
}

8. define a task type

// type definition
class HelloNameTask extends DefaultTask {
    String firstName
 
    @TaskAction
    void doAction() {
        println "Hello, $firstName"
    }
}
 
// create a task with type
task helloName(type: HelloNameTask) {
    firstName = 'Jeremy'
}