Maven variable for reactor root

Question

In a multi-module maven project, is there a variable that points to the root project folder?

• ${project.basedir} points to the current project\'s d

Answer 1

Use directory-maven-plugin with directory-of goal.

Unlike other suggestions:

• This solution works for multi-module projects.
• It works whether you build the whole project or a sub-module
• It works whether you run maven from the root folder or a sub-module (unlike ${session.executionRootDirectory}
• There's no need to set a relative path property in each and every sub-module!

The plugin lets you set a property of your choice to the absolute-path of any of the project's modules. In my case I set it to the root module... In my project root pom:

 
    org.commonjava.maven.plugins
    directory-maven-plugin
    0.1
    
        
            directories
            
                directory-of
            
            initialize
            
                myproject.basedir
                
                    com.my.domain
                    my-root-artifact
                
            
        
    

From then on, ${myproject.basedir} in any sub-module pom always has the path of the project root module. And of course, you can set the property to any module, not just the root...