Gradle Rule Base API

android-app-build.gradle

class ExtraTask extends RuleSource {
    @Mutate void createCopyTasks(ModelMap<Task> tasks) {
        tasks.grep({it.name.contains("package")})
            .grep({!it.name.contains("Test")})
            .each {
            if(it.name.contains("package")) {
                // it 就是 packageXXX 的 task，outputFile 就是他預計輸出的 apk
                // 這欄位是查原始碼來的 http://bit.ly/2bH99aw
                def outputFile = it.outputFile
                // 接著我們建一個新的 copyXXX 的 task 讓原來的 packageXXX 相依它
                def taskName = "copy" + (it.name - "package")
                def copyTask = tasks.create(taskName, Copy) {
                    from outputFile
                    into outputFile.getParent()
                    rename {
                        it + "你眼睛業障重啊.apk"
                    }
                }
                it.dependsOn tasks[taskName]
            }
        }
    }
}

apply plugin: ExtraTask

model.txt

qty:MyApplication3 qrtt1$ ./gradlew model
To honour the JVM settings for this build a new JVM will be forked. Please consider using the daemon: https://docs.gradle.org/2.14.1/userguide/gradle_daemon.html.
Incremental java compilation is an incubating feature.
:model

------------------------------------------------------------
Root project
------------------------------------------------------------

+ tasks
      | Type:           org.gradle.model.ModelMap<org.gradle.api.Task>
      | Creator:        Project.<init>.tasks()
    + buildEnvironment
          | Type:       org.gradle.api.tasks.diagnostics.BuildEnvironmentReportTask
          | Value:      task ':buildEnvironment'
          | Creator:    tasks.addPlaceholderAction(buildEnvironment)
          | Rules:
             ⤷ copyToTaskContainer
    + clean
          | Type:       org.gradle.api.tasks.Delete
          | Value:      task ':clean'
          | Creator:    Project.<init>.tasks.clean()
          | Rules:
             ⤷ copyToTaskContainer
    + components
          | Type:       org.gradle.api.reporting.components.ComponentReport
          | Value:      task ':components'
          | Creator:    tasks.addPlaceholderAction(components)
          | Rules:
             ⤷ copyToTaskContainer
    + dependencies
          | Type:       org.gradle.api.tasks.diagnostics.DependencyReportTask
          | Value:      task ':dependencies'
          | Creator:    tasks.addPlaceholderAction(dependencies)
          | Rules:
             ⤷ copyToTaskContainer
    + dependencyInsight
          | Type:       org.gradle.api.tasks.diagnostics.DependencyInsightReportTask
          | Value:      task ':dependencyInsight'
          | Creator:    tasks.addPlaceholderAction(dependencyInsight)
          | Rules:
             ⤷ HelpTasksPlugin.Rules#addDefaultDependenciesReportConfiguration(DependencyInsightReportTask, ServiceRegistry)
             ⤷ copyToTaskContainer
    + help
          | Type:       org.gradle.configuration.Help
          | Value:      task ':help'
          | Creator:    tasks.addPlaceholderAction(help)
          | Rules:
             ⤷ copyToTaskContainer
    + init
          | Type:       org.gradle.buildinit.tasks.InitBuild
          | Value:      task ':init'
          | Creator:    tasks.addPlaceholderAction(init)
          | Rules:
             ⤷ copyToTaskContainer
    + model
          | Type:       org.gradle.api.reporting.model.ModelReport
          | Value:      task ':model'
          | Creator:    tasks.addPlaceholderAction(model)
          | Rules:
             ⤷ copyToTaskContainer
    + projects
          | Type:       org.gradle.api.tasks.diagnostics.ProjectReportTask
          | Value:      task ':projects'
          | Creator:    tasks.addPlaceholderAction(projects)
          | Rules:
             ⤷ copyToTaskContainer
    + properties
          | Type:       org.gradle.api.tasks.diagnostics.PropertyReportTask
          | Value:      task ':properties'
          | Creator:    tasks.addPlaceholderAction(properties)
          | Rules:
             ⤷ copyToTaskContainer
    + tasks
          | Type:       org.gradle.api.tasks.diagnostics.TaskReportTask
          | Value:      task ':tasks'
          | Creator:    tasks.addPlaceholderAction(tasks)
          | Rules:
             ⤷ copyToTaskContainer
    + wrapper
          | Type:       org.gradle.api.tasks.wrapper.Wrapper
          | Value:      task ':wrapper'
          | Creator:    tasks.addPlaceholderAction(wrapper)
          | Rules:
             ⤷ copyToTaskContainer

BUILD SUCCESSFUL

Total time: 13.04 secs
qty:MyApplication3 qrtt1$