maven-metadata.xml contains only last deployed version

[reimerp]

if I use this plugin for subsequent deplyoments of differen release versions
(we use a release Nexus Repository)
a new artefact is uploaded, but also a new
maven-metadata.xml file.
This file is located in the basedir of the artefact and it should contain a list of deployed versions.
Currently this list is destroyed / not maintained by the plugin, it simply overwrites the array with the actual version.

The epected behavior should be:

• download metadata isf available,
• add current version to version array
• update lastmodified / latest etc. (as done already)
• upload the file to the server again

Currently all tools depending on metadata will only see the last version deployed, older version are not visable, even if the artefact file still exists.