task创建

//直接通过tadk函数去创建
task helloTask {
    println 'hello task!!!'
}

task helloTask1(group: "jimmy", description: 'task study') {
    println 'hello task!!!'
}

task (helloTask2, {
    println 'hello task222!!!'
})
//通过TaskCopntainer去创建Task
this.tasks.create(name: "helloTask3") {
    setGroup('jimmy')
    setDescription('task study333')
    println 'hello task333!!!'
}

doFirst

task helloTask1(group: "jimmy", description: 'task study') {
    println 'hello task!!!'
    doFirst {
        println 'doFirst 001, group: ' + group
    }
}
//下面的外部doFirst 先于上面的doFirst执行
helloTask1.doFirst {
    println 'doFirst 002, description: ' + description
}

计算build执行时长

def startBuildTime, endBuildTime
this.afterEvaluate { Project project ->
    //保证要找的task已经配置完毕
    def preBuildTask = project.tasks.getByName('build') //preBuild 是错误的
    preBuildTask.doFirst {
        startBuildTime = System.currentTimeMillis()
        println 'Bulid 开始时间: ' + startBuildTime
    }

    def buildTask = project.tasks.getByName('build')
    buildTask.doLast {
        endBuildTime = System.currentTimeMillis()
        println "Bulid 结束时间: ${endBuildTime - startBuildTime}"
    }
}

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task依赖

task taskX {
    doLast {println 'taskX'}
}

task taskY {
    doLast {println 'taskY'}
}

task taskZ (dependsOn: [taskX, taskY]) {
    //dependsOn this.tasks.findAll {task -> task.name.startsWith("lib")}
    doLast {println 'taskZ'}
}
println "-----------------"
//  << 相当于 doLast
task lib1 << {
    println 'lib1'
}

task lib2 << {
    println 'lib2'
}

task noLib << {
    println 'noLib'
}