View source for Gradle.properties

=Internal=

* [[Gradle Properties - Runtime and Project Configuration|Gradle Properties - Runtime and Project Configuration]]

=Overview=

'gradle.properties' files are used to define configuration [[Gradle Properties - Runtime and Project Configuration#Overview|properties]]. gradle.properties files can be present in two layers: the [[#Gradle_User_Home_gradle.properties|user home directory .gradle directory]] and the [[#Project_Root_gradle.properties|project root]]. Property keys must comply with the rules described here: [[Gradle Properties - Runtime and Project Configuration#Property_Keys|Property Keys]].

=Hierarchy=

==Gradle User Home gradle.properties==

This file is  stored in Gradle user home directory ~/.gradle/gradle.properties, conventionally referred to as GRADLE_USER_HOME. Any property declared in this file will be available to all user's Gradle projects.

==Project Root gradle.properties==

Conventionally, this is where the version of the project is stored:

<syntaxhighlight lang='text'>
version=1.0-SNAPSHOT
</syntaxhighlight>

This file is important because it can be stored in source control, so the entire team working on the project can share the same configuration.

==Multi-Project Builds==
Each project of a multi-project build can maintain a gradle.properties file in its root.

==Precedence Rules==
If files from both layers are present, their content is merged and the configuration that comes from the user home directory takes precedence over the configuration that comes from the project root directory. This makes sense from a security perspective, as the user home directory is not checked in into a repository while the project is, and we need to store security sensitive configuration. When the same property is declared in both root project and a sub-project's gradle.properties files, the value coming from the sub-project takes precedence over the root project value.

=Projection=

The properties configured in gradle.properties files are flattened according the precedence rules described above and projected into the Project instance where they can be accessed as project properties, similarly to [[Gradle Extra Properties|extra properties]]. 

gradle.properties:
<syntaxhighlight lang='groovy'>
my.color=blue
</syntaxhighlight>
build.properties:
<syntaxhighlight lang='groovy'>
println project.my.color
</syntaxhighlight>


If [[gradle.properties]] declares: 
<syntaxhighlight lang='groovy'>
shape = 'square'
</syntaxhighlight>
the configured value can be accessed from the project ([[build.gradle]]) simply using the property name:
<syntaxhighlight lang='groovy'>
task display {
  doLast {
    // equivalent property references
    println project.shape 
    println shape
  }
}
</syntaxhighlight>