Manage multiple maven version

It will allow to switch easily between multiple maven versions.

After you install mvnenv, when you run the command "mvn" a script in mvnenv's bin directory will be executed it will check the configuration, automatically set M2_HOME to the desired maven installation and MAVEN_OPTS to the desired option and finally execute the mvn command.

Tested on Mac OS X (10.9.2)

Installation

Check out mvnenv into ~/.mvnenv.

    $ git clone https://github.com/themnd/mvnenv.git ~/.mvnenv

Add ~/.mvnenv/bin to your $PATH.
```
    $ echo 'export PATH="~/.mvnenv/bin:$PATH"' >> ~/.bash_profile
```
JENV note

if you use jenv (http://www.jenv.be) make sure the "export PATH" command in point 2 is placed before eval "$(jenv init -)"

MAVEN note if maven bin is present in $PATH it must be listed AFTER mvnenv! you can remove maven bin from $PATH, since the "mvn" (and "mvnDebug" and "mvnyip" are automatically handled by mvnenv).

Add mvnenv init to your shell.

    $ echo 'eval "$(mvnenv init)"' >> ~/.bash_profile

Start a new shell.
```
    $ source ~/.bash_profile
```
Verify that mvnenv works.
```
    $ mvnenv --version
```
Add the needed maven versions.
```
    $ mvnenv add /path/to/maven2
    $ mvnenv add /path/to/maven3
```
for example mvnenv add /opt/local/share/java/maven2
Configure which maven version to use.

Globally

~~~ sh
    $ mvnenv global maven2
~~~

*In this directory*

~~~ sh
    $ mvnenv local maven2
~~~

*In the current shell*

~~~ sh
    $ mvnenv shell maven2
~~~

8. Verify that works.

~~~ sh
    $ mvn -version
~~~

Commands Available

This is the list of available commands. Normally when a command raise an error it will also set the exit code to 1.

mvnenv --version

Display the current mvnenv version.

mvnenv add

Add a maven installation to the list of available versions.

    $ mvnenv add /opt/local/share/java/maven3
    install /opt/local/share/java/maven3 as maven3
    do install

in case that version was already added:

    $ mvnenv add /opt/local/share/java/maven3
    install /opt/local/share/java/maven3 as maven3
    already installed

mvnenv current

Display the maven version that will be used.

    $ mvnenv current
    Using global version maven3
    Using global version maven3
    Using global option -Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true

mvnenv global

Without parameters will show you which version is used for global.

    $ mvnenv global
    Current global mvn version

    maven3

    Available:

    maven2
    maven3
    maven311

With the name of a version will set that version as the global one.

    $ mvnenv global maven2

mvnenv global options

Without parameters will show you if there is any global option set.

    $ mvnenv global options
    Current global mvn option: -Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true

    $ mvnenv global options 
    There is no global mvn option set

You can set a specific global option (the --set parameter is optional).

    $ mvnenv global options "-Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true"
    setting option: [-Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true]

And you can unset the current global option:

    $ mvnenv global options --unset
    Removed global mvn option: -Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true

if set the MAVEN_OPTS environment variable have always the precedence over global options

mvnenv init

This command is only used in the .bashrc | .bash_profile to setup the other commands, you must have this in your init script:

    eval "$(mvnenv init)"

mvnenv local

This command allow you to set a specific version for the current directory, it does it by creating a file named .mvnenv_version in the current directory, this means that for subdirectories the global one will apply.

Without parameters will show you which version is used for local.

    $ mvnenv local
    Current local mvn version

    maven3

    Available:

    maven2
    maven3
    maven311

With the name of a version will set that version as the local one.

    $ mvnenv local maven2

You can remove the current local version by using --unset.

    $ mvnenv local --unset
    Removed local maven version

mvnenv local options

Without parameters will show you if there is any local option set.

    $ mvnenv local options
    Current local mvn option: -Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true

    $ mvnenv local options 
    There is no local mvn option set

You can set a specific local option (the --set parameter is optional).

    $ mvnenv local options "-Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true"
    setting option: [-Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true]

And you can unset the current local option:

    $ mvnenv local options --unset
    Removed local mvn option: -Xmx1024m -XX:MaxPermSize=512m -Dcom.sun.management.jmxremote -Djava.awt.headless=true

if set the MAVEN_OPTS environment variable have always the precedence over local options

mvnenv remove

Remove a maven version from the list of available versions.

    $ mvnenv remove maven3

mvnenv shell

This command allow you to set a specific version for the current shell.

Without parameters will show you which version is used for the shell.

    $ mvnenv shell
    Current shell mvn version

    maven3

    Available:

    maven2
    maven3
    maven311

With the name of a version will set that version for the current shell.

    $ mvnenv shell maven2

You can remove the current shell version by using --unset.

    $ mvnenv shell --unset
    Removed shell maven version

mvnenv versions

List the available maven versions that have been added with the add command.

    $ mvnenv versions
    maven2
    maven3
    maven311

Thanks

Please feel free to submit pull requests and file bugs on the issue tracker.

Heavily inspired by https://github.com/gcuisinier/jenv

Thanks to https://blog.jcoglan.com/2013/02/12/tab-completion-for-your-command-line-apps for explaining clearly how autocomplete works.

Mvnenv

Install / Use

README