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http://jira.codehaus.org/browse/MNG-3060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_99915
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Brian Fox commented on MNG-3060:
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Your idea is interesting, but any changes to the pom requires a model change
that would require a medium version update (ie 2.x not 2.0.x) and would force
you to update anyway (to get the feature to keep you from updating ;-) ) Since
mvn is just a bat or shell script, there's nothing to prevent you from making a
few of them like m204, m206 etc to launch the correct one. Then you could use
the enforcer plugin to make sure the correct version was used for the current
project. Along the same lines, you could put your version in some other file
parallel to the pom that your script reads and uses to decide. This is more
divergence from the mainstream than using enforcer, but it could work too.
> backwards compatible maven command line
> ---------------------------------------
>
> Key: MNG-3060
> URL: http://jira.codehaus.org/browse/MNG-3060
> Project: Maven 2
> Issue Type: New Feature
> Components: Command Line
> Reporter: Ryan Christianson
>
> I work for a company that is using maven 2.0.4. We are looking at upgrading
> to 2.0.6, but we have many projects that might be broken by the upgrade. This
> means that we need to upgrade all of our old projects, which its expensive.
> I'm wondering if this could be solved by updating the command line tool to
> support multiple installed versions of maven.
> It might work like this:
> - add a "suggested maven version" to pom.xml files (eg.
> <mavenVersion>2.0.4</mavenVersion>
> - update the mvn command line tool to look for the suggested version maven as
> class paths like this:
> - M2_HOME_2_0_4 would be maven 2.0.4, M2_HOME_2_0_6 would be 2.0.6 and so on.
> - if no M2_HOME_{$VERSION} is found, then use M2_HOME
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