为什么gradle任务不能按正确的顺序运行

Question

我有2个子项目的java项目。像这样的结构

- project_root
  |- client
     |- src
     |- build.gradle
  |- server
     |- src
     |- build.gradle
  |- build.gradle

我只需要在root buiild.gradle中创建'deploy'任务，然后执行以下操作：

null

allprojects {
    apply plugin: 'java'
    repositories {
        mavenCentral()
    }
}

task cleanTarget(type: Delete) {
    delete "target"
    delete "target.zip"
}

task cleanAll() {
    dependsOn cleanTarget
    dependsOn clean
    dependsOn subprojects.clean
}

task jarChilds() {
    dependsOn subprojects.jar
}

task copyFiles(type: Copy) {
    copy {
        from("client/build/libs/")
        into project.file('target')
    }
    copy {
        from("server/build/libs/")
        into project.file('target')
    }
}

task zipApp(type: Zip) {
    from 'target/'
    include '*'
    include '*/*'
    archiveName 'target.zip'
    destinationDir(project.rootDir)
}

task deploy{
    dependsOn cleanAll
    dependsOn jarChilds
    dependsOn copyFiles
    dependsOn zipApp
    jarChilds.shouldRunAfter cleanAll
    copyFiles.shouldRunAfter jarChilds
    zipApp.shouldRunAfter copyFiles
}

Executing task 'deploy'...

> Task :clean
> Task :cleanTarget
> Task :client:clean
> Task :server:clean
> Task :cleanAll
> Task :client:compileKotlin
> Task :client:compileJava
> Task :client:processResources
> Task :client:classes
> Task :client:inspectClassesForKotlinIC

> Task :client:jar
Client jar done

> Task :server:compileKotlin
> Task :server:compileJava
> Task :server:processResources
> Task :server:classes
> Task :server:inspectClassesForKotlinIC

> Task :server:jar
Server jar done

> Task :jarChilds
> Task :copyFiles NO-SOURCE
> Task :zipApp NO-SOURCE
> Task :deploy


BUILD SUCCESSFUL in 3s
14 actionable tasks: 14 executed
12:39:15: Task execution finished 'deploy'.

我看到错误“no-source”，但是文件夹“client/build/libs”和“server/build/libs”存在并包含jar。我可以肯定，因为手动运行任务‘复制文件’创建文件夹‘目标’和复制所有文件。我看到的唯一可能的选项是“复制文件”任务在“jar childs”之前运行。但我不明白为什么。我错过了什么，为什么不起作用？

对不起，我的英语不好

Answer 1

您的任务copyfiles使用项目实例的方法copy而不是配置实际任务。这就是为什么任务保持未配置状态，并且一旦执行，就报告没有文件要处理(no-source)。若要配置任务，请使用任务类型copy的方法：

task copyFiles(type: Copy) {
    from("client/build/libs/")
    from("server/build/libs/")
    into("target")
}

附加提示：您可能根本不需要任务copyfiles。相反，您可以使用任务zipapp来收集文件：

task zipApp(type: Zip) {
    from subprojects.jar
    archiveName 'target.zip'
    destinationDir(project.rootDir)
}

通过将子项目的JAR任务放入from方法，Gradle甚至可以自动添加任务依赖项，因此您不需要使用dependson注册它们。

请查看以下简短完整的build.gradle文件：

subprojects {                    // using subprojects here, because your root project has no sources
    apply plugin: 'java'
    repositories {
        mavenCentral()
    }
}

task clean(type: Delete) {       // without the 'java' plugin, there is no automatic 'clean' task
    dependsOn subprojects.clean
    delete 'target.zip'
}

task zipApp(type: Zip) {
    mustRunAfter clean
    from subprojects.jar
    archiveName 'target.zip'
    destinationDir(project.rootDir)
}

task deploy {
    dependsOn clean
    dependsOn zipApp
}