任務聲明不在gradle中工作

Question

我有下面的代碼，這是失敗的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") 
} 

錯誤： -

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. 

但是，如果我的代碼更改爲： -

//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") 
} 

其完美運行。 Normaly宣佈任務並稍後使用它。但用dependsOn方法會失敗。爲什麼？

Answer 1

你的問題不是，顯然它在你的第二個例子中有效。

問題是，當你嘗試定義任務主體時，你錯過了task聲明，所以gradle將groovy代碼解釋爲方法調用。意思是，當你寫：

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

搖籃不承認它作爲一個任務，而是看到了dressup(dependsOn: wakeup)部分，你試圖調用與參數{dependsOn: wakeup}命名dressup方法。但是不存在這樣的方法，並且你得到錯誤。

這就是爲什麼你總是需要告訴gradle這個，這是一個任務，即：

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

根據你的第二個（成功）的例子。