Maven build second level+ child projects using reactor option -pl

Question

My maven project structure is as below

Project A 
  pom.xml
  - ProjectB
    pom.xml
    - ProjectC
      pom.xml
    - ProjectD
      pom.xml
  - ProjectY
    p         


        

Answer 1

From the documentation for the -pl option it states the following:

-pl,--projects                 Comma-delimited list of specified
                                    reactor projects to build instead
                                    of all projects. A project can be
                                    specified by [groupId]:artifactId
                                    or by its relative path.

The important part for you is: "or by its relative path".

So to build projectC, you simply need to refer to it by its relative path (projectB/projectC). So the command you need is:

mvn clean install -pl projectB/projectC