Andreas Sewe created MNG-6059:
---------------------------------

             Summary: Important use cases not covered, as 
child.inherit.append.path affects all children
                 Key: MNG-6059
                 URL: https://issues.apache.org/jira/browse/MNG-6059
             Project: Maven
          Issue Type: Bug
          Components: Inheritance and Interpolation
         Environment: Apache Maven 3.4.0-SNAPSHOT 
(227085283b6379038ec16f4cf9ad2e8869cef694; 2016-07-06T21:29:12+02:00)
            Reporter: Andreas Sewe


The {{child.inherit.append.path}} attribute introduced with MNG-5951 
unfortunately does not support the use case where the children of the element 
with the attribute should follow different inheritance rules. Take a typical 
configuration for Github, for example (taken from 
<http://central.sonatype.org/pages/requirements.html>):

{noformat}
<scm>
  <connection>scm:git:git://github.com/simpligility/ossrh-demo.git</connection>
  
<developerConnection>scm:git:ssh://github.com:simpligility/ossrh-demo.git</developerConnection>
  <url>http://github.com/simpligility/ossrh-demo/tree/master</url>
</scm>
{noformat}

If the {{ossrh-demo.git}} repository contains a child module called 
{{some-module}}, then that child’s {{scm/url}} should become 
{{http://github.com/simpligility/ossrh-demo/tree/master/some-module}} as per 
the normal inheritance rules, but both the {{scm/connection}} and 
{{scm/developerConnection}} URLs should remain unchanged.

Unfortunately, this is not possible with {{*child*.inherit.append.path}}, which 
acts on all children simultaneously.

IMHO, this is a conceptual problem. In particular, setting 
{{child.inherit.append.path}} on the *root* element to just control a single 
child ({{project/url}}) feels wrong, as the attribute is in all likelihood not 
even located close to the {{<url>}} element it controls.



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