Add support for Mega (mega.co.nz) backend

[carloslp]

Mega is a file hosting service and successor to Megaupload. Free accounts are provided with 50GB and paid accounts are available for up to 4TB.

An API that allows third party app developers (duplicity) that allows them to easily integrate the MEGA support in their apps.

https://mega.co.nz/#developers

The megatools project, which implements among other things a FUSE filesystem for MEGA, can be used as example to guide in the implementation of this backend for duplicity.

https://github.com/megous/megatools

Thanks a lot!

[Christian Kornacker (ckornacker)]

I branched a mega.co.nz capable version which is based on the gdocs backend.
However, I'm not too familiar with the duplicity code, so the implementation might be far from perfect. It has a requirement on the mega.py python module from https://github.com/ckornacker/mega.py.git (fork of https://github.com/richardasaurus/mega.py.git).

Let me know what you think. Also, I'm in no way related to mega.co.nz :)

[Christian Kornacker (ckornacker)]

In case you want to test the packages, I've created a PPA.

apt-add-repository ppa:ckornacker/backup
apt-get update
apt-get install python-mega duplicity deja-dup

[Janne Snabb (snabb)]

Thanks a lot for making this available! Works well here.

[Marc Mezzarobba (marc+bugs)]

Works well for me as well, except for a minor bug that makes some error messages unreadable:

=== modified file 'duplicity/backends/megabackend.py'
--- duplicity/backends/megabackend.py 2013-05-08 14:15:02 +0000
+++ duplicity/backends/megabackend.py 2013-07-10 11:44:41 +0000
@@ -136,7 +136,7 @@
     def __get_node_name(self, handle):
         """get node name from public handle"""
         files = self.client.get_files()
- return get_name_from_file({handle:files[handle]})
+ return self.client.get_name_from_file({handle:files[handle]})

     def __handle_error(self, message, raise_errors=True):
         if raise_errors: