如何在Gradle脚本中根据环境变量动态编辑Android Manifest文件

android {
    // ...

    applicationVariants.all { variant ->
        variant.outputs.all { output ->
            def manifestFile = variant.processManifest.manifestOutputFile
            def environment = System.getenv("ENVIRONMENT")

            // 根据环境变量动态编辑Manifest文件
            if (environment == "production") {
                output.processManifest.doLast {
                    def manifestContent = manifestFile.getText()
                    manifestContent = manifestContent.replace("{{ENVIRONMENT}}", "Production")
                    manifestFile.write(manifestContent)
                }
            } else if (environment == "staging") {
                output.processManifest.doLast {
                    def manifestContent = manifestFile.getText()
                    manifestContent = manifestContent.replace("{{ENVIRONMENT}}", "Staging")
                    manifestFile.write(manifestContent)
                }
            }
        }
    }
}

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.app">

    <application
        android:name=".MyApplication"
        android:label="@string/app_name"
        android:theme="@style/AppTheme">

        <!-- 其他配置 -->

        <meta-data
            android:name="com.example.app.ENVIRONMENT"
            android:value="{{ENVIRONMENT}}" />
    </application>

</manifest>

export ENVIRONMENT=production