Override property in build.gradle from the command line

Question

In build.gradle we can define variables like:

def libVersion='someVersion' 

We can override properties in command line with -PlibVersion=otherVersion

Unfortunately it seems this command line option does not affect local variables defined in build.gradle. Is there a way to override these from command line? Please note that for some reasons i do not want to create settings.gradle nor gradle.properties files.

Answer 1

Here's an example:

ext.greeting = project.hasProperty('greeting') ? project.getProperty('greeting') : 'hello'  task greet << {     println greeting } 

If you run gradle greet, it will print hello.

If you run gradle -Pgreeting=welcome greet, it will print welcome.