接續 Day 9，接著來看 dependencyResolutionManagement{} 的作用。

settings.gradle

pluginManagement {
    repositories {
        ...
    }
}
dependencyResolutionManagement {

    /**
     * The dependencyResolutionManagement {repositories {...}}
     * block is where you configure the repositories and dependencies used by
     * all modules in your project, such as libraries that you are using to
     * create your application. However, you should configure module-specific
     * dependencies in each module-level build.gradle file. For new projects,
     * Android Studio includes Google's Maven repository and the Maven Central
     * Repository by default, but it does not configure any dependencies
     * (unless you select a template that requires some).
     * 
     * dependencyResolutionManagement {repositories {...}} 區塊
     * 配置專案內所有模組的儲存庫(repositories)及依賴項(dependencies)。
     * 然而，你應該要在每一個模組層級(module-level)的 build.gradle 檔案
     * 配罝專屬該模組的依賴項。
     * 在 Android Studio 建立的新專案，預設配置了 Google's Maven 儲存庫
     * 和 Maven Central 儲存庫。
     * 除非你選擇了需求依賴項的範本，才會有配置依賴項。
     */

    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
    repositories {
        google()
        mavenCentral()
    }
}
rootProject.name = "My Application"
include ‘:app’

那在 Gradle 的文件上可以再次看到一樣的說明，dependencyResolutionManagement{} 允許幫所有 projects 配置依賴項解決方案。

Allows configuring dependency resolution for all projects of the build

repositoriesMode.set() 則定義了如何在構建過程中安裝依賴項。

The repository mode configures how repositories are setup in the build.

預設傳入 RepositoriesMode.FAIL_ON_PROJECT_REPOS，表示任何在專案中宣告的依賴項，不論是直接宣告或透過 plugin 引入，都會觸發構建過程錯誤模式。

If this mode is set, any repository declared directly in a project, either directly or via a plugin, will trigger a build error.