classpath和compile的区别

下面英文就是对compile和classpath区别的解释：

I’m going to guess that you’re referencing compile and classpath 
within the dependencies {} block. If that is so, those are dependency 
Configurations.

A configuration is simply a named set of dependencies. The compile 
configuration is created by the Java plugin. The classpath 
configuration is commonly seen in the buildSrc {} block where one 
needs to declare dependencies for the build.gradle, itself (for 
plugins, perhaps).

classpath的作用：

buildscript itself needs something to run, use classpath

complie的作用：

your project needs something to run, use compile

所以在Project中的gradle的dependencies 指添加依赖是使用classpath的，classpath 一般是添加buildscript本身需要运行的东西。比如build.gradle中需要用到TaskName为t1的Task，而这个Task定义在其他插件里面，就要通过classpath添加该插件。（例子详见（4）创建Task的多种方法）

定义classpath，gradle会从“repositories”中下载对应版本的Gradle。如果使用gradle wrapper的话，感觉这个配置会被忽略。Wrapper会自己去下载所使用的gradle版本。

gradle wrapper task利用gradle-wrapper.properties来下载指定的gradle。