Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Gradle Goodness: Get Property Value With findProperty

DZone's Guide to

Gradle Goodness: Get Property Value With findProperty

Wonder what the difference between Gradle's "findProperty" and "property" methods are? Read on for the answer and how to use them properly.

· DevOps Zone ·
Free Resource

Don’t let inefficiencies in software testing lead to delayed deployments and poor quality products. Get the 90 Days to Better QA Guide by Rainforest QA for best practices to avoid these common pitfalls.

Gradle 2.13 added a new method to get a property value: findProperty. This method will return a property value if the property exists or null if the property cannot be found. Gradle also has the property method to return a property value, but this method will throw an exception if the property is missing. With the new findProperty method and the Groovy elvis operator (?:) we can try to get a property value and if not found return a default value.

In the following example we have a task that tries to print the value of the properties sampleOld and sampleNew. We use the findProperty for sampleNew and the property method for sampleOld:

// File: build.gradle
task resolveProperties ${project.hasProperty('sampleOld') ? project.property('sampleOld') : 'default value for sampleOld'}"
 println "sampleNew -> ${project.findProperty('sampleNew') ?: 'default value for sampleNew'}"
}

First run the task and not set the project properties sampleOld and sampleNew:

$ gradle -q resolveProperties
sampleOld -> default value for sampleOld
sampleNew -> default value for sampleNew
$

Next we use the -P command line option to set a value for the properties:

$ gradle -q -PsampleOld="Value sampleOld" -PsampleNew="Value sampleNew" resolveProperties
sampleOld -> Value sampleOld
sampleNew -> Value sampleNew
$

Written with Gradle 2.13.

Discover how to optimize your DevOps workflows with our on-demand QA solution, brought to you in partnership with Rainforest QA.

Topics:
method ,property ,value ,gradle ,groovy

Published at DZone with permission of

Opinions expressed by DZone contributors are their own.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}