如何从build.gradle文件中提取插件？

Question

下面的“build.gradle”：

apply plugin: GreetingPlugin

class GreetingPlugin implements Plugin<Project> {

    void apply(Project project) {

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

当您运行时：

gradle hello

:hello
Hello, World

BUILD SUCCESSFUL

class GreetingPlugin implements Plugin<Project> {

    void apply(Project project) {

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

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

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

我肯定这一定是可能的，那么你是怎么做到的呢？

Answer 1

我找到了两个合理的解决办法：

你好。格雷德尔：

apply plugin: GreetingPlugin

class GreetingPlugin implements Plugin<Project> {

    void apply(Project project) {

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

Build.Gradle：

apply from: 'hello.gradle'

class GreetingPlugin implements Plugin<Project> {

    void apply(Project project) {

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

ext.GreetingPlugin = GreetingPlugin

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