Question

我在myplugin.gradle创建了一个插件：

apply plugin: MyPlugin

class MyPluginExtension {
   String srcDir = null
}

class MyTask extends DefaultTask {

   @InputFiles FileCollection srcFiles

   @TaskAction
   def task() {
      println srcFiles
   }
}

class MyPlugin implements Plugin<Project> {

 @Override
 void apply(Project project) {
    project.with {
       project.extensions.create("myConfig", MyPluginExtension)
       tasks.create(name: "firstTask", type: MyTask) {
       srcFiles = files(fileTree(dir: "mySrcDir",  // need to access srcDir
              include: "**/*.java"))
       }
    }
  }
}

创建任务时，我需要设置srcFiles。为此，我需要从插件扩展中访问srcDir属性。我想将mySrcDir替换为插件扩展名中指定的srcDir。

我需要这样设置srcFiles输入的MyTask。这必须在任务之外设置，以便gradle可以跟踪任务是否是最新的以及是否有任何源文件已更改。

如何在创建任务期间从项目扩展程序访问属性？

Answer 1

It's impossible. You need to create extension, use it and then configure the task. Now you create extension and at once use it to configure the task - srcDir value will be always null. That's the way to go:

apply plugin: MyPlugin

myConfig {
    srcDir = 'lol'
}

class MyTask extends DefaultTask {

    @InputFiles 
    FileCollection srcFiles

    @TaskAction
    def task() {
        println srcFiles
    }
}

class MyPluginExtension {
    String srcDir = null
}

class MyPlugin implements Plugin<Project> {

    @Override
    void apply(Project project) {
        project.extensions.create('myConfig', MyPluginExtension)
        project.tasks.create(name: "firstTask", type: MyTask) 
    }
}

firstTask {
    srcFiles = project.files(project.fileTree(dir: project.myConfig.srcDir, include: "**/*.java"))
}

在创建任务期间访问项目扩展？

1 个答案: