[ Gradle 常見問題 ] How to set global variables

Source From Here
Question
How can I set a global variable that can be accessed from build.gradle and tasks?

How-To
To set a global variable by ExtraPropertiesExtension:

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1. project.ext.set("variableName", value)  

To access it from anywhere in the project:

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1. project.variableName  

For instance:
- builld.gradle

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1. /* 引用 java plugin 獲得編譯 java 專案相關的 task $ */  
2. apply plugin: 'java'  
3.   
4. /* 引用 application plugin 獲得執行 java 專案相關的 task $ */  
5. apply plugin:'application'  
6.   
7. printf("project.ext=%s\n", project.ext)  
8. project.ext["name"] = "john"  
9.   
10. task hello(type: GreetingTask)  
11.   
12. class GreetingTask extends DefaultTask{  
13.     @TaskAction  
14.     def greet()  
15.     {  
16.         printf('Hello from GreetingTask %s', project.ext.name)  
17.     }  
18. }  
19.   
20. printf("Read project.name='%s'\n", project.ext.name)  

Execution output:

# gradle hello
project.ext=org.gradle.api.internal.plugins.DefaultExtraPropertiesExtension@3cab430b
Read project.name='john'
:hello
Hello from GreetingTask john
BUILD SUCCESSFUL

Total time: 0.509 secs

This message was edited 4 times. Last update was at 25/06/2017 14:59:44