Android發佈不一樣的Module變體AAR到Maven庫

1、背景

最近項目中有個需求，其中關鍵一環是發佈不一樣Module變體到Maven庫。一開始沒意識到這點，經過經常使用的apply plugin: 'maven'插件配置寫法，發現執行uploadArchives任務成功，但實際上並無產物生成。且uploadArchives所依賴各task也並無執行，期間無其餘有效提示日誌信息。後來終於想到應該是構建變體緣由，經與同事交流，最終發現能夠使用maven-publish插件。

2、maven-publish 插件

實際上Android官網上已經有針對不一樣Module變體到Maven庫的指引文檔，且所使用的正是maven-publish插件。

Android Gradle 插件 3.6.0 及更高版本支持 Maven Publish Gradle 插件，可以讓您將構建工件發佈到 Apache Maven 代碼庫。Android Gradle 插件會爲應用或庫模塊中的每一個構建變體工件建立一個組件，您能夠使用它來自定義要發佈到 Maven 代碼庫的發佈內容。

maven-publish插件功能至關強大，不只能夠區分變體發佈模塊AAR，同時還支持發佈AAB甚至APK文件。

具體文檔地址：
developer.android.com/studio/buil…
docs.gradle.org/current/use…

3、示例

1，官網發佈AAR示例：

// Because the components are created only during the afterEvaluate phase, you must
// configure your publications using the afterEvaluate() lifecycle method.
afterEvaluate {
    publishing {
        publications {
            // Creates a Maven publication called "release".
            release(MavenPublication) {
                // Applies the component for the release build variant.
                from components.release

                // You can then customize attributes of the publication as shown below.
                groupId = 'com.example.MyLibrary'
                artifactId = 'final'
                version = '1.0'
            }
            // Creates a Maven publication called 「debug」.
            debug(MavenPublication) {
                // Applies the component for the debug build variant.
                from components.debug

                groupId = 'com.example.MyLibrary'
                artifactId = 'final-debug'
                version = '1.0'
            }
        }
    }
複製代碼

2，項目中使用的配置，其中部分腳本示例：

apply plugin: 'com.android.library'
apply plugin: 'maven-publish'

task androidJavadocs(type: Javadoc) {
    // 設置源碼所在的位置
    source = android.sourceSets.main.java.srcDirs
    exclude '**/R.html', '**/R.*.html', '**/index.html'
}

// 生成javadoc.jar
task androidJavadocsJar(type: Jar) {
    // 指定文檔名稱
    archiveClassifier.set('javadoc')
    from androidJavadocs.destinationDir
}

// 生成sources.jar
task androidSourcesJar(type: Jar) {
    archiveClassifier.set('sources')
    from android.sourceSets.main.java.sourceFiles
}

afterEvaluate {
    publishing {
        publications {
            thGoogleSdk(MavenPublication) {
                groupId = 'com.corn.pay'
                artifactId = project.getName()
                version = '1.1.3-SNAPSHOT'
                pom.withXml{
                    def dependenciesNode = asNode().appendNode("dependencies")
                    configurations.implementation.allDependencies.forEach(){
                        Dependency dependency ->
                            if (dependency.version != "unspecified" && dependency.name != "unspecified"){
                                def dependencyNode = dependenciesNode.appendNode('dependency')
                                dependencyNode.appendNode('groupId', dependency.group)
                                dependencyNode.appendNode('artifactId', dependency.name)
                                dependencyNode.appendNode('version', dependency.version)
                            }
                    }
                }

                artifact androidJavadocsJar
                artifact androidSourcesJar
                artifact(tasks.getByName("bundleThGoogleSdkReleaseAar"))
            }
        }

        repositories {
            maven {
                def devUrl = "https://maven.xxxx.com/nexus"
                def user = 'xxxx'
                def pass = 'yyyy'

                String target = pom_target
                if (target == "release") {
                    url = "${devUrl}/content/repositories/releases/"
                    credentials {
                        username = user
                        password = pass
                    }
                } else if (target == "local") {
                    // test, upload local maven repository
                    url = "file:" + new File(project.rootProject.rootDir, "mavenlocal").path
                } else {
                    url = "${devUrl}/content/repositories/snapshots"
                    credentials {
                        username = user
                        password = pass
                    }
                }
            }
        }
    }
}

複製代碼