如何將Gradle Plugin（及其依賴）加載到build.gradle中？

Question

我有兩個gradle這個文件的項目：build.gradle和myPlugin.gradle

的myPlugin.gradle實現的插件接口。該插件還對osdetector-gradle-plugin

我加了對方旁邊兩個gradle這個文件的依賴性，然後我試圖申請爲myplugin爲build.gradle如下：

apply from: 'myPlugin.gradle' 

不過，我有以下錯誤myPlugin.gradle文件：

Plugin with id 'com.google.osdetector' not found 

這裏是myPlugin.gradle文件的代碼：

apply plugin: 'groovy' 
apply plugin: 'maven' 

    repositories { 
    mavenCentral() 
    mavenLocal() 
    } 
    dependencies { 
     compile 'com.google.gradle:osdetector-gradle-plugin:1.4.0' 
    } 

import org.gradle.api.tasks.TaskAction 
import org.gradle.api.DefaultTask 
import org.gradle.api.Plugin 
import org.gradle.api.Project 

apply plugin: 'com.google.osdetector' 
apply plugin: HostingMachineOSPlugin 

class HostingMachineOSPlugin implements Plugin<Project>{ 
    void apply(Project project){ 
     project.plugins.apply("com.google.osdetector"); 
     //project.configurations.files('com.google.osdetector') 
     println project.osdetector.os 

     /* Extend the project property to have the class HostingMachineOS */ 
     project.ext.HostingMachineOS = HostingMachineOS 
    } 
} 

public class HostingMachineOS { 

    static family = "Unkown" 

    static def setFamilyName(name){ 
     family = name 
    } 

    static def isLinux(){ 
     family == "linux" 
    } 

    static def isWindows(){ 
     family == "windows" 
    } 

    static def isMacOS(){ 
     family == "osx" 
    } 
} 

HostingMachineOS.setFamilyName(osdetector.os) 

在build.gradle文件：我只是做這樣的事情：

//定義buildScript庫和依賴然後

apply from: 'myPlugin.gradle' 

task dummy{ 
    println HostingMachineOS.isMacOS() 
    println HostingMachineOS.isLinux() 
    println HostingMachineOS.isWindows() 
} 

我怎樣才能解決這個插件ID爲「com.google.osdetector」不發現了什麼？

Answer 1

這是一個常見的錯誤，爲build.gradle文件添加一個插件需要爲構建腳本本身添加一個依賴項 - 不適用於項目。下面的代碼（如果您申請的插件文件中添加）片就可以解決這個問題：

buildscript { 

    repositories { 
    mavenCentral() 
    mavenLocal() 
    } 

    dependencies { 
    classpath 'com.google.gradle:osdetector-gradle-plugin:1.4.0' 
    } 

} 

編輯

請看看here - 看來，如果你需要apply from第三-party腳本你需要使用完整的類名（包）。因此，如下的文件應該被定義爲：

的build.gradle

apply from: 'myPlugin.gradle' 

task dummy{ 
    println HostingMachineOS.isMacOS() 
    println HostingMachineOS.isLinux() 
    println HostingMachineOS.isWindows() 
} 

myPlugin.gradle

buildscript { 
    repositories { 
    mavenCentral() 
    } 
    dependencies { 
    classpath 'com.google.gradle:osdetector-gradle-plugin:1.4.0' 
    } 
} 

apply plugin: 'groovy' 
apply plugin: 'maven' 
apply plugin: com.google.gradle.osdetector.OsDetectorPlugin 
apply plugin: HostingMachineOSPlugin 

class HostingMachineOSPlugin implements Plugin<Project>{ 
    void apply(Project project){ 
     project.plugins.apply(com.google.gradle.osdetector.OsDetectorPlugin); 
     //project.configurations.files('com.google.osdetector') 
     println project.osdetector.os 

     /* Extend the project property to have the class HostingMachineOS */ 
     project.ext.HostingMachineOS = HostingMachineOS 
    } 
} 

public class HostingMachineOS { 

    static family = "Unkown" 

    static def setFamilyName(name){ 
     family = name 
    } 

    static def isLinux(){ 
     family == "linux" 
    } 

    static def isWindows(){ 
     family == "windows" 
    } 

    static def isMacOS(){ 
     family == "osx" 
    } 
} 

HostingMachineOS.setFamilyName(osdetector.os)