java - gradle 依赖项 : what "classpath" keyword means exactly and where it is documented?

Question

我在网络上搜索了“gradle classpath site:stackoverflow.com”和“gradle classpath”，并仅在以下位置找到了相关信息:
Gradle: What is the difference between classpath and compile dependencies?

于腾宝的回答中写道:

compile 'org.hibernate:hibernate-core:5.0.5.Final' is a module dependency declaration. The compile configuration (which is now deprecated by the implementation configuration.) is merely a keyword for Implementation only dependencies. It is not a keyword describing which type of dependency it is (by type here I'm following the three types defined in the tutorial, i.e. module, file, and project.)

据我了解 classpath 也是关键字。我试图在 gradle 文档中找到它的含义: https://docs.gradle.org/current/userguide/declaring_dependencies.html

以及其中引用的其他一些内容:
https://docs.gradle.org/current/userguide/dependency_management_for_java_projects.html https://docs.gradle.org/current/userguide/java_library_plugin.html https://docs.gradle.org/current/dsl/org.gradle.api.artifacts.Configuration.html https://docs.gradle.org/current/userguide/variant_model.html https://docs.gradle.org/current/userguide/java_plugin.html

另外: https://docs.gradle.org/current/javadoc/org/gradle/api/initialization/dsl/ScriptHandler.html https://docs.gradle.org/current/javadoc/org/gradle/api/tasks/Classpath.html https://docs.gradle.org/current/userguide/organizing_gradle_projects.html

其中提到了“compileClasspath”。如果 classpath 关键字仅仅被弃用为 compile 关键字，为什么文档中没有它？

附注我的意思是像:

buildscript {
    repositories {
        jcenter()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.4.1'
   }
}

回答后添加:

在gradle源代码中搜索getBuildscript():

Answer 1

So as I understood classpath is also keyword

这是不正确的。 classpath、compile、implementation、api 等等都是 configurations 。 Gradle 中的配置是树状的，这意味着通常每个配置都从某个父级扩展:

来源:https://docs.gradle.org/current/userguide/java_library_plugin.html#sec:java_library_configurations_graph

例如，使用实现配置，当您在build.gradle中执行以下操作时:

dependencies {
    implementation("org.apache.commons:commons-lang3:3.9")
}

你实际上在做:

project.getDependencies().add("implementation", "org.apache.commons:commons-lang3:3.9")

前者使用Gradle DSL而后者直接使用Gradle API。

If classpath keyword is merely deprecated as compile one, why is it absent from docs?

编译配置已被弃用，如所述here 。仍然使用 classpath 配置，但通常仅与 buildscrpt { } 一起使用 block 。

举个例子:

buildscript {
    dependencies {
        classpath("com.android.tools.build:gradle:3.4.1")
    }
}

脱糖至:

project.getBuildscript().getDependencies().add("classpath", "com.android.tools.build:gradle:3.4.1")