Backup files module.
marvs - July 27, 2009 - 01:43
hi.. Backup and Migrate module is great. I've learned a lot of codes and tricks in this module and also in the Backup files module. Based on this 2 modules my module created and I have a lot of codes copied from the Backup Migrate module and Backup files module. Can I contribute my new module without the permission of the developer of this 2 modules.
My new module backup zip and tgz files from the file directory of drupal. Also have manual and schedule backup. It can also download and restore files from backup.

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This was just explained to you in IRC. you need to first apply for a CVS account, but duplication of code is usually frowned upon as you've been told.
That said, rather than duplicating code it is best to work with the maintainers of backup and migrate and get your changes into the module as a patch so the anyone using the module doesn't have to work with more code then necessary.
to apply for CVS see: http://drupal.org/node/59 ensure your write should be throrough and honest with regards to code duplication.