如何在自定义Gradle插件中获取$ project.version？ [英] How to Get $project.version in Custom Gradle Plugin?

问题描述

在定制gradle插件中， project.version 似乎总是未指定。为什么以及如何检索自定义插件（类）中的 project.version ？

例如：

  apply plugin：'java'
 apply plugin：MyPlugin 
 
 version =1.0.0 
 
 println在构建文件：$ project.version
 
 class MyPlugin implements Plugin< Project> {
 public void apply（Project project）{
 project.task（'myTask'）{
 printlnIn plugin：$ project.version
} 
} 
 
 $ / code> 

打印出来：



 <> code>％; gradle -q myTask 
在插件中：未指定
在构建文件中：1.0.0 
  

<

解决方案

您在调用<$ c $之后设置属性c> apply

如果您移动

  version =1.0.0
  

到行前

  apply plugin：MyPlugin 
  

它应该工作

编辑

在Peter的答案之后，你可以看到这也适用于：

  apply plugin：'java'
 apply plugin：MyPlugin 
 
 version =1.0.0
 
 println在构建文件中：$ project.version
 
 class MyPlugin实现插件< Project> {
 public void apply（Project project）{
 project.task（'myTask'）{
 project.gradle.projectsEvaluated {
 printlnIn plugin：$ project.version 
} 
} 
} 
} 
  

延迟对 $ project.version 的评估，直到构建完成评估为止。

Within a custom gradle plugin the project.version seems to always be unspecified. Why and how to retrieve the project.version within a custom plugin (class)?

For Example:

apply plugin: 'java'
apply plugin: MyPlugin

version = "1.0.0"

println "In build file: $project.version" 

class MyPlugin implements Plugin<Project> {
  public void apply(Project project) {
    project.task('myTask') {
      println "In plugin: $project.version"
    }
  }
}

Prints out:

%> gradle -q myTask
  In plugin: unspecified
  In build file: 1.0.0

Besides the how I really would like to know the why?

解决方案

You set the property after you call apply

If you move

version = "1.0.0"

To before the line

apply plugin: MyPlugin

It should work

Edit

Following Peter's answer, you can see that this works also:

apply plugin: 'java'
apply plugin: MyPlugin

version = "1.0.0"

println "In build file: $project.version" 

class MyPlugin implements Plugin<Project> {
  public void apply(Project project) {
    project.task('myTask') {
      project.gradle.projectsEvaluated { 
        println "In plugin: $project.version"
      }
    }
  }
}

To delay the evaluation of $project.version until evaluation of the build is complete

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