Allow defined dependencies to be related to certain types (attachments)
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         Key: MNG-872
         URL: http://jira.codehaus.org/browse/MNG-872
     Project: Maven 2
        Type: Bug
 Reporter: Kenney Westerhof


Currently, if you have attachments on a pom, both the main artifact and the 
attachments have the
same dependencies.

Use case 1:
  packaging ejb: there's an ejb jar and an ejb-client jar. The ejb-client jar 
only
  contains interfaces (actually, everything except the beans themselves), but no
  business logic. The business logic in the ejb beans themselves however can 
have
  a dependency that is not required for the ejb-client.

Use case 2:
  POMS producing .jar, .dll and .so suffer from the same problem. If there are 
dependencies
  needed for just one or two types (either the jar or both .dll and .so), 
depending on
  the other type also includes those dependencies.

Proposal: add a tag <forTypes> (better name!) to <dependency>; when absent, all 
types
will have this dependency; when present, only the specified types will have 
these dependencies.

Implications:
- add 'getXXClasspath( type ); methods to MavenProject and let the plugins use 
those.
- dependency resolution should pick foreign dependencies parameterized by the 
<type>
  or get them all and just group them by type (the first is preferred since the 
latter will cause
  unused dependencies to be resolved).



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