How do you get the maven binary version from within a custom Mojo?

Question

I'm referring to the maven binary version that is returned when you usually run

mvn --version

from the command line which returns an output like the below,

Apache Maven 3.0.4
Maven home: /usr/share/maven
Java version: 1.6.0_45, vendor: Sun Microsystems Inc.
Java home: /home/uvindra/Apps/java6/jdk1.6.0_45/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "3.11.0-15-generic", arch: "amd64", family: "unix"

Note the maven version 3.0.4. What's best way of accessing this from within a custom Maven Mojo in Java? Is there a property available for this?

I want to run a validation against current maven version that is executing my Mojo, Thanks

Answer 1

Using getApplicationVersion() as mentioned by khmarbaise has been deprecated, getMavenVersion() is the recommended function to be used. You need to include maven-core 3.0.2 or higher as a dependency to use the RuntimeInformation class.

here is the complete usage example,

Required pom dependency

<dependency>
   <groupId>org.apache.maven</groupId>
   <artifactId>maven-core</artifactId>
   <version>3.0.2</version>
</dependency>

Package import

import org.apache.maven.rtinfo.RuntimeInformation;

Usage

 /**
 *
 * @component
 */
private RuntimeInformation runtime;

public void execute() {
     String version = runtime.getMavenVersion();
     getLog().info("Maven Version: " + version);
     ...
}

@khmarbaise, Thanks for pointing me in the right direction

Answer 2

You could get the information about the current Maven version by using the following code snippet:

@Component
private RuntimeInformation runtime;

public void execute() {
  ArtifactVersion version = runtime.getApplicationVersion();
  getLog().info("Version: " + version);
...
}

The runtime also offers information about getBuildNumber(), getIncrementalVersion(), getMajorVersion(), getMinorVersion() and getQualifier(). That should fit your needs.