Question

我有以下代码失败的gradle文件。

task wakeup
task dressup
task playMusic
task goRunning

//dependsOn(task)

wakeup <<{  
    println("I am awake,i need to go for a run")
}

dressup(dependsOn: wakeup)<<{
    println("I am ready with my track suit")
}

playMusic(dependsOn: dressup)<<{
    println("I have played track 7")
}

goRunning(dependsOn: playMusic)<<{
    println("I am running")
}

错误： -

C:\Users\akathaku\Desktop\gradlelearning>gradle -q -b taskmethods.gradle goRunning

FAILURE: Build failed with an exception.

* Where:
Build file 'C:\Users\akathaku\Desktop\gradlelearning\taskmethods.gradle' line: 14

* What went wrong:
A problem occurred evaluating root project 'gradlelearning'.
> Could not find method dressup() for arguments [{dependsOn=task ':wakeup'}] on root project 'gradlelearning'.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

但如果我将代码更改为： -

//dependsOn(task)

task wakeup <<{ 
    println("I am awake,i need to go for a run")
}

task dressup(dependsOn: wakeup)<<{
    println("I am ready with my track suit")
}

task playMusic(dependsOn: dressup)<<{
    println("I have played track 7")
}

task goRunning(dependsOn: playMusic)<<{
    println("I am running")
}

它运行得很好。 Normaly声明一项任务并在以后使用它。但是使用dependsOn方法这是失败的。为什么？

Answer 1

您的问题不是dependsOn method，显然它适用于您的第二个示例。

问题是你在尝试定义任务主体时缺少task声明，因此gradle将groovy代码解释为方法调用。这意味着，当你写：

dressup(dependsOn: wakeup)<<{
    println("I am ready with my track suit")
}

Gradle不会将其识别为任务，而是在您尝试使用参数dressup(dependsOn: wakeup)调用名为dressup的方法时看到{dependsOn: wakeup}部分。但是没有这样的方法，你得到错误。

这就是为什么你总是需要告诉gradle这是一项任务，即：

task dressup(dependsOn: wakeup)<<{
    println("I am ready with my track suit")
}

根据你的第二个（也是成功的）例子。

任务声明不在gradle中工作

1 个答案: