We use this on our Jenkins CI , to cleanup our NFS based shared repository

mvn-repo-cleaner - Maven Repository Cleaner is a utility to clean up the local .m2 directory on a developer box.

As newer versions of dependent libraries appear, the old ones become obsolete and never get cleaned up. This program assists to free up some disk space by removing older versions of libraries downloaded to the .m2 directory.

This can be used just by extracting mvn-repo-cleaner.tar.gz / mvn-repo-cleaner.zip and executing the execute.sh / execute.bat as per the environment to clean up all non-latest versions of the libraries in the .m2 directory.

To attempt a dry-run, just execute the simulate.sh / simulate.bat to see the files that would be removed without actually deleting the files. This output is also generated in the mvn-repo-cleaner.log.

To run with more advanced options, open the terminal and execute the jar with appropriate switches as provided below.

NOTE: When using the --path/-p option, the target it points to must contain a directory (or symlink) called repository. This might be needed when cleaning a local directory used for publishing.

Usage: java -jar mvn-repo-cleaner.jar [options]

Options:

--accessedBefore, -ab
  Delete all libraries (even if latest version) last accessed on or before 
  this date (MM-DD-YYYY).
  Default: 0
--accessedAfter, -aa
  Delete all libraries (even if latest version) last accessed on or after 
  this date (MM-DD-YYYY).
--deleteAllSnapshots, -dsn
  Delete all snapshots irrespective of being latest.
  Default: false
--deleteJavadoc, -djd
  Delete javadocs for all libraries.
  Default: false
--deleteSource, -dsr
  Delete sources for all libraries.
  Default: false
--downloadedBefore, -db
  Delete all libraries (even if latest version) downloaded on or before 
  this date (MM-DD-YYYY).
  Default: 0
--downloadedAfter, -da
  Delete all libraries (even if latest version) downloaded on or after 
  this date (MM-DD-YYYY).
--dryrun, -dr
  Do not delete files, just simulate and print result.
  Default: false
--forceArtifacts, -fa
  Comma separated list of groupId:artifactId combination to be deleted.
--forceGroups, -fg
  Comma separated list of groupIds (full or part) to be deleted.
--ignoreArtifacts, -ia
  Comma separated list of groupId:artifactId combination to be ignored.
--ignoreGroups, -ig
  Comma separated list of groupIds (full or part) to be ignored.
--path, -p
  Path to m2 directory, if using a custom path.
--retainOld, -ro
  Retain the artifacts even if old versions. Only process the configured inputs.
  Default: false

Feel free to raise any issues or recommend any changes or improvements.