plugins - 如何从 build.gradle 文件中提取插件？

Question

为了简化我的构建，我想从“build.gradle”中提取自定义插件并将它们放入单独的 gradle 文件中。

这是我能想出的最简单的例子。

1。在 build.gradle 中定义一个插件 (WORKS)

以下“build.gradle”:

apply plugin: GreetingPlugin

class GreetingPlugin implements Plugin<Project> {

    void apply(Project project) {

        project.task('hello') << {
            println "Hello, World"
        }
    }
}

当你运行时:

gradle hello

产生:

:hello
Hello, World

BUILD SUCCESSFUL

2。从 build.gradle 中提取插件(不起作用)

我想将插件定义移动到另一个文件“hello.gradle”中:

class GreetingPlugin implements Plugin<Project> {

    void apply(Project project) {

        project.task('hello') << {
            println "Hello, World"
        }
    }
}

并将“build.gradle”更改为:

apply from: 'hello.gradle'
apply plugin: GreetingPlugin

现在当我运行时:

gradle hello

它产生:

FAILURE: Build failed with an exception.

* Where:
Build file 'build.gradle' line: 2

* What went wrong:
A problem occurred evaluating root project 'gradle-problem'.
> Could not find property 'GreetingPlugin' on root project 'gradle-problem'.

BUILD FAILED

Total time: 1.723 secs

我确信这一定是可能的，那么你是怎么做到的呢？

Answer 1

我找到了两个合理的解决方案:

1。在外部文件中应用插件

你好.gradle:

apply plugin: GreetingPluginclass GreetingPlugin implements Plugin<Project> {    void apply(Project project) {        project.task('hello').doLast {            println "Hello, World"        }    }}

build.gradle:

apply from: 'hello.gradle'

2。通过将插件类添加到 ext 属性

来导出插件类

你好.gradle:

class GreetingPlugin implements Plugin<Project> {    void apply(Project project) {        project.task('hello').doLast {            println "Hello, World"        }    }}ext.GreetingPlugin = GreetingPlugin

build.gradle:

apply from: 'hello.gradle'
apply plugin: GreetingPlugin