Bug#896295: Tensorflow is missing

[Lumin]

Hello Debian-Science folks,

Please feel free to CC me if you need any input about deep learning.

> From: Andreas Tille
> the description says:
> 
>  ...  Alternatively, Keras could run on Google's
>  TensorFlow (not yet available in Debian, but coming up).
> 
> Is there some estimated time frame to package TensorFlow?

No estimated time frame for it. TensorFlow provides bazel build for
linux and cmake build for windows.  Bazel itself is blocking for years,
and a DD, Paul Liu, who worked on it in the past had said that it was
hard to deal with. I guess the bazel build system is still blocking
currently.
 
> If not please try to deactivate this alternative since the package does
> not work as this bug report explains.

I'd suggest patching upstream source to use Theano as the default
backend, and comment it clearly in the descriptions.

> From: Stephen Sinclair
> Regarding Tensorflow packaging I do not know, someone on debian-science
> mentioned difficulties with its build system. I do hope these are
> resolvable but it seems to be a big issue.

That so-called "someone" was me, actually. Bazel build is actually a big
issue, and I have no plan to patch the windows cmake build in a
reasonable time frame.

You may have found that Debian-team holds a tensorflow repo on Salsa,
but that's merely an old copy of upstream code.
https://salsa.debian.org/science-team/tensorflow

I'm currently maintaing several TensorFlow dependencies. Hope that
They will be helpful sometime in the future.

    farmhash
	gemmlowp
	highwayhash

The full list of dependency can be found in the third_part directory
of tensorflow source.