[MacPorts] #30652: maven_select @0.3 sot link for maven installation needs to be created

[MacPorts]

#30652: maven_select @0.3 sot link for maven installation needs to be created
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 Reporter:  hxliang1982@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement            |      Status:  new                                  
 Priority:  Low                    |   Milestone:                                       
Component:  ports                  |     Version:  2.0.1                                
 Keywords:  maven, M2_HOME         |        Port:                                       
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 M2_HOME should be set in order to make maven work. "port select --set
 maven maven2" only sets up link of "mvn", so each time I change maven
 version, I have to modify M2_HOME, or I need to create a soft link
 somewhere by myself.

 So suggestion is to add a soft link to /opt/local/share/java, each time
 maven version is selected, update this soft link.

 Basically, "base", "maven2", "maven3" should be updated by adding one
 entry

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Ticket URL: <https://trac.macports.org/ticket/30652>
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