Re: [gentoo-java] Re: Maven from source - version 2.x or 3.x ?

[Robert Burrell Donkin <robertburrelldonkin@gmail.com>]

On Wed, May 25, 2011 at 5:09 PM, Jörg Schaible <joerg.schaible@gmx.de> wrote:
> Hi Robert,

Hi Jörg

> Robert Burrell Donkin wrote:

<snip>

>> maven seems to be moving towards requiring specific core versions for
>> builds. some  projects i develop require maven 2, some maven 3. i
>> manage this situation with a set of custom scripts and installations
>> independent of gentoo. i expect other developers now work in a similar
>> way. (same goes for jdks.) the gentoo java stuff just gets in my way
>> now for development.
>
> Why? I have emerged maven:1.0, maven:1.1, maven:2.0, maven:2.2 and
> maven:3.0. I've selected my default version with eselect. However, I can use
> any of those versions at the same time:
>
> /usr/bin $ ls -lGgo m*v*n*
> lrwxrwxrwx 1    34 Jan 22 14:07 maven-1.0 -> /usr/share/maven-
> bin-1.0/bin/maven
> lrwxrwxrwx 1    34 Jan 22 14:07 maven-1.1 -> /usr/share/maven-
> bin-1.1/bin/maven
> lrwxrwxrwx 1     7 Jul 19  2010 mvn -> mvn-3.0
> lrwxrwxrwx 1    32 Apr 30  2010 mvn-2.0 -> /usr/share/maven-bin-2.0/bin/mvn
> lrwxrwxrwx 1    32 Apr 30  2010 mvn-2.2 -> /usr/share/maven-bin-2.2/bin/mvn
> lrwxrwxrwx 1    32 Mar 10 18:17 mvn-3.0 -> /usr/share/maven-bin-3.0/bin/mvn
>
> All that eselect effectively does is to switch the unversioned link. You may
> call any of those scripts (well, you should not have set MAVEN_HOME at all,
> the Maven start script will do this for you anyway).

eselect edits the symlinks. this switches the maven version for the
entire system. i want to be able to switch maven (and ant and java)
versions for just a terminal. is there some way to make this work with
eselect?

- robert