Maven: Overview for the values of Maven properties

Question

I would like to find out the values of all Maven properties as they apply to some Maven project.
mvn help:system lists OS environment variables and

Answer 1

As a workaround, add this to the ... section inside your project's pom.xml:

  org.apache.maven.plugins
  maven-antrun-plugin
  1.7
  
    
      validate
      
        run
      
      
        
          
        
      
    
  

Now execute mvn validate.
On the console, prefixed with [echoproperties], there will be the full list of system properties, including those set by Maven such as project.build.outputDirectory, basedir, and settings.localRepository.