Re: How to develop back-ends

[Michael Terry <mike mterry name>]

Yeah there are several backends in duplicity that don't show in deja-dup yet.

I don't necessarily want each one.  Only the ones that are relatively easy for users to sign up for (Amazon S3 isn't really -- but that's historical support) and that I don't imagine breaking on users.

Once something is supported by deja-dup, it tends to need support forever (like I ended up doing with S3) -- it's rough to drop support for a backend.  And some backends aren't fully baked (like the mega backend).

-mt

On 24 April 2015 at 13:26, pabloalmeidaff9 gmail com <pabloalmeidaff9 gmail com> wrote:

Good to know there are examples. :)

So, what you're saying is that there's lots of backends there just waiting for someone to write the "glue code" to make it appear in deja-dup?

Em sex, 24 de abr de 2015 às 14:23, Michael Terry <mike mterry name> escreveu:

Oh, you may be looking at the packages for optional deja-dup backends.  But the duplicity backends aren't specially packaged.  You'd just need to manually install the extra python libraries required for your backend of choice and then use it.

Look at lp:duplicity's duplicity/backends/ directory for plenty of examples.

-mt

On 24 April 2015 at 13:19, pabloalmeidaff9 gmail com <pabloalmeidaff9 gmail com> wrote:

Really? How come I can only find Amazon S3 on Ubuntu? Something about the Software Center?

Em sex, 24 de abr de 2015 14:07, Michael Terry <mike mterry name> escreveu:

Oh yes, they have backends for all sorts of things.  They'll easily take a new one.

On 24 April 2015 at 13:01, pabloalmeidaff9 gmail com <pabloalmeidaff9 gmail com> wrote:

Good. Thanks for the info. I'll take a look at duplicity, then. One last thing: do you know if the people on duplicity are well-receiving of this kind of contribution?

Em sex, 24 de abr de 2015 13:57, Michael Terry <mike mterry name> escreveu:

Duplicity is in Python, yes.  And yes, you would need to get a MediaFire backend merged into duplicity.

S3 is a separate package in Ubuntu because duplicity's backends often require extra packages (in S3's case, python-boto) to actually work.  So the backends are optional in that way.

Once MediaFire is a supported backend in duplicity, Deja Dup can begin using it.

-mt

On 24 April 2015 at 12:13, pabloalmeidaff9 gmail com <pabloalmeidaff9 gmail com> wrote:

Mediafire. So I have to projects to work with. Interesting. Which part demands the most work? Is duplicity done in Python? Also, when you say make sure it's in duplicity, you mean the resulting code will be merged into duplicity? If so, how come in Ubuntu, Amazon S3 is a separate package? Thanks.

Em sex, 24 de abr de 2015 10:51, Michael Terry <mike mterry name> escreveu:

Which online provider?

The first step is to make sure the backend is in duplicity, the python-based commandline tool that deja-dup uses behind the scene.

Then there's a bit of glue code needed in deja-dup (vala-based) to expose that backend and connect it with duplicity.

-mt

On 24 April 2015 at 08:31, pabloalmeidaff9 gmail com <pabloalmeidaff9 gmail com> wrote:

Hello. I'm interested in developing a backend for Deja-dup so I it will become possible to backup to a certain online storage provider. What are the first steps? Where can I find the documentation for this? What are the programming languages used? Is it hard? Thanks. :)

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