如何在Gradle中实现这个"动态块"？

Question

我是新手.所以,直截了当.我想实现如下块.请注意,这些库是动态的,可供其他开发人员添加以用于所需的库.

libraries {
    slf4j 'org.slf4j:slf4j-api:1.7.21'
    junit 'junit:junit:4.12'
}

所以我可以像这样打电话给他们.

dependencies {
    compile libraries.slf4j
    testCompile libraries.junit
}

我不知道该怎么做.但我从这里找到了一些相关的解决方案.如下所示:

apply plugin: GreetingPlugin

greeting {
    message 'Hi'
    greeter 'Gradle'
}

class GreetingPlugin implements Plugin<Project> {
    void apply(Project project) {
        project.extensions.create("greeting", GreetingPluginExtension)
        project.task('hello') {
            doLast {
                println "${project.greeting.message} from ${project.greeting.greeter}"
            }
        }
    }
}

class GreetingPluginExtension {
    String message
    String greeter
}

问题是当我添加到greeting块时,我需要声明它们GreetingPluginExtension.任何想法如何使它只在greeting块上更新？

Answer 1

你需要做的是利用groovy元编程.您可以在下面找到一个样本,但功能齐全.

apply plugin: LibrariesPlugin

libraries {
    slf4j 'org.slf4j:slf4j-api:1.7.21'
    junit 'junit:junit:4.12'
}

class LibrariesPlugin implements Plugin<Project> {
    void apply(Project project) {
        project.extensions.create("libraries", LibrariesPluginExtension)
        project.task('printLib') {
            doLast {
                println "$project.libraries.slf4j"
                println "$project.libraries.junit"

                project.libraries.each {
                    println "$it.key -> $it.value"
                }
            }
        }
    }
}

class LibrariesPluginExtension {

    Map libraries = [:]

    def methodMissing(String name, args) {
        // TODO you need to do some arg checking here
        libraries[name] = args[0]
    }

    def propertyMissing(String name) {
        // TODO same here
        libraries[name]
    }

    Iterator iterator() {
        libraries.iterator()
    }
}