gradle使用方法

创建一个项目

你可以通过创建一个build.gradle的文件来开始一个项目，然后可以向文件中加入构建逻辑。

$ mkdir basic-demo

$ cd basic-demo

$ touch build.gradle

运行 tasks 命令

一个项目包含了一个多个tasks的集合，每个tasks都完成一个基本的操作

通过运行tasks命令可以查看项目中有哪些可用的tasks

$ gradle tasks

:tasks

------------------------------------------------------------

All tasks runnable from root project

------------------------------------------------------------

Build Setup tasks

-----------------

init - Initializes a new Gradle build.

wrapper - Generates Gradle wrapper files.

Help tasks

----------

buildEnvironment - Displays all buildscript dependencies declared in root project 'basic-demo'.

components - Displays the components produced by root project 'basic-demo'. [incubating]

dependencies - Displays all dependencies declared in root project 'basic-demo'.

dependencyInsight - Displays the insight into a specific dependency in root project 'basic-demo'.

dependentComponents - Displays the dependent components of components in root project 'basic-demo'. [incubating]

help - Displays a help message.

model - Displays the configuration model of root project 'basic-demo'. [incubating]

projects - Displays the sub-projects of root project 'basic-demo'.

properties - Displays the properties of root project 'basic-demo'.

tasks - Displays the tasks runnable from root project 'basic-demo'.

To see all tasks and more detail, run gradle tasks --all

To see more detail about a task, run gradle help --task <task>

创建gradle文件夹

wrapper task 创建一个gradle wrapper文件，这个wrapper文件包含一个小脚本、jar文件和属性文件，

这个wrapper文件可以让用户在没有装Gradle的情况下运行

产生的目录结构如下：

.

├── build.gradle

├── gradle

│   └── wrapper

│       ├── gradle-wrapper.jar

│       └── gradle-wrapper.properties

├── gradlew          //Wrapper script for Unix-based systems

└── gradlew.bat      //Wrapper script for Windows

运行 properties 命令

properties 命令告诉用户项目有哪些属性

:properties

------------------------------------------------------------

Root project

------------------------------------------------------------

buildDir: /Users/.../basic-demo/build

buildFile: /Users/.../basic-demo/build.gradle

description: null

group:

name: basic-demo

projectDir: /Users/.../basic-demo

version: unspecified

BUILD SUCCESSFUL

你可以改变许多用户属性，例如可以添加如下属性到build.gradle文件中：

description = 'A trivial Gradle build'

version = '1.0'

配置Gradle核心任务

Gradle本身有一个task库，你可以在自己的项目中配置这些task。例如，Copy是一个核心task，作用是复制文件。

创建一个路径：src
创建一个叫myfile.txt的文件到src下

定义一个类型是Copy的叫做copy的任务，语法如下

task copy(type: Copy) {

    from 'src'

    into 'dest'

}

执行copy任务：

$ ./gradlew copy

:copy

加入一个Hello World！任务

task hello {

    doLast {

        println 'Hello, World!'

    }

}

执行，输出：

$ ./gradlew hello

:hello

Hello, World!

BUILD SUCCESSFUL

巴特西