我如何覆盖build.gradle中定义的属性？ [英] How can I override a property defined in build.gradle?

问题描述

如何在build.gradle文件中设置属性并允许每个开发人员在本地覆盖它？我试过：

gradle.properties：

  MY_NAME =Jonathon 
 MY_COLOR =blue
  

build.gradle：

  ext.MY_NAME =John Doe
任务showit<< {
 printlnMY_NAME [+ MY_NAME +] ; 
 printlnMY_COLOR [+ MY_COLOR +]; 
} 
  

gradle showit 给出：

 ：showit 
 MY_NAME [John Doe] 
 MY_COLOR [blue] 
  

我认为在项目根目录下的gradle.properties文件中定义的属性会覆盖具有相同名称的属性在build.gradle中，但这似乎并非如此。它只填补了一个缺失的属性。

解决方案

检查项目是否有属性，如果没有，则将其设置为默认值：
如果（！project.hasProperty（'MY_NAME'））{b
$ b

  ext {
 
 MY_NAME ='John Doe'
} 
} 
  

请参阅： https://docs.gradle.org/current/userguide/build_environment。 html＃sub：checking_for_project_properties

如果您需要为多个属性执行此操作，您可以定义一个函数：

  def setPropertyDefaultValueIfNotCustomized（propertyName，defaultValue）{
 if（！project.hasProperty（propertyName））{
 ext [propertyName] = defaultValue 
} 
} 
 
分机{
 setPropertyDefaultValueIfNotCustomized（'MY_NAME'，'John Doe ）
} 
  

How can I set a property in the build.gradle file and allow each developer to override it locally? I tried:

gradle.properties:

MY_NAME = "Jonathon"
MY_COLOR = "blue"

build.gradle:

ext.MY_NAME = "John Doe"
task showit <<{
  println "MY_NAME[" + MY_NAME + "]";
  println "MY_COLOR[" + MY_COLOR + "]";
}

gradle showit gives:

:showit
MY_NAME[John Doe]
MY_COLOR["blue"]

I thought that a property defined in a gradle.properties file at the project root would override a property with the same name defined in build.gradle, but this does not appear to be the case. It only fills in for a missing property.

解决方案

Check whether the project has a property, and if not, set it to the default value:

ext {
    if (!project.hasProperty('MY_NAME')) {
        MY_NAME = 'John Doe'
    }
}

See: https://docs.gradle.org/current/userguide/build_environment.html#sub:checking_for_project_properties

If you need to do this for multiple properties, you can define a function:

def setPropertyDefaultValueIfNotCustomized(propertyName, defaultValue) {
    if (!project.hasProperty(propertyName)) {
        ext[propertyName] = defaultValue
    }
}

ext {
    setPropertyDefaultValueIfNotCustomized('MY_NAME', 'John Doe')
}

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