jenkinsci/ws-cleanup-plugin — pull request #12 by jacobgardner (2013-09-04 22:25:08+00:00)
Title: Allow external tool to be used for deletion (such as unlocker)

- If a node has delete_command environment variable, it will be used
instead of the default functionality.

The format of the command is:
"path/to/executable" [options] %s

Unlocker, for example:
"C:\Program Files\Unlocker\unlocker.exe" %s /D /S