Gradle Extra Properties
Internal
Overview
An extra property is a property that can be declared on most model object instances available to the closure being executed. Extra properties allow defining variables that are used multiple times within the same script, such as a file that is referred from multiple locations of the build script. An extra property is equivalent to a user-defined variable. Internally, extra properties are stored as key-value pairs in a map, associated with the model object instance, most notably the project instance.
To add properties, use the "ext" namespace:
ext {
color = 'blue'
}
project.ext.color = 'green'
project.color = 'red' // project.ext.color and project.color are equivalent after property initialization
task displayColor {
doLast {
println project.ext.color
println project.color
println color
}
}
For the above example, ./gradlew displayColor
will display "red".
Note that the "ext" script block or project.ext
syntax must only be used at declaration, for subsequent access the extra property can be looked up directly on the project instance.