Background
==========

To provide a migration path for Satellite/Pulp users, Pulp needs to migrate content from old version to the newer one.
To achieve that an xml snippet of each repodata for each package needs to be parsed and converted into createrepo_c object.

Createrepo_c offers parsers for primary/other/filelists which require a path to a file. Current options for Satellite/Pulp are:

 - [in memory] write our own xml parser to parse each snippet and create a createrepo_c object from that data 
 - [write to a file ] for each package wrap each of xml snippets to make them a valid xml and write them to 3 files, and then use createrepo_c parser   
        cr.xml_parse_primary(primary_xml_path, pkgcb=pkgcb, do_files=False)
        cr.xml_parse_filelists(filelists_xml_path, newpkgcb=newpkgcb)
        cr.xml_parse_other(other_xml_path, newpkgcb=newpkgcb)
 - [write to a file] optimized version of previous one - process packages in batches and not one by one - wrap and write xml snippets of multiple packages into 3 files and then use createrepo_c parser as in the previous option,

NOTE: When I say createrepo_c, I mean createrepo_c Python bindings.


Request
=======

Provide a way to get a createrepo_c Package object(s) from xml snippets of repodata without needing to write files to disk.

Timeline
========

This problem (in Satellite/Pulp) needs to be solved this way or the other in the upstream by the end of March (changes in the upstream for createrepo_c will work for us). 

Please, let us know soon if the functionality is getting added to the createrepo_c or Pulp needs to solve it in some way themselves.