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From: zimoun <zimon.toutoune@gmail.com>
Subject: =?UTF-8?Q?Re=3A_the_upcoming_Great_Python2_Purge=E2=84=A2?=
Date: Mon, 18 Feb 2019 15:42:35 +0100
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To: Ricardo Wurmus <rekado@elephly.net>
Cc: Guix Devel <guix-devel@gnu.org>

Dear,

Maybe I am wrong and I miss one point.

If you have local packages that depends on Guix packages, then it is
not a big issue when the Guix packages are removed. Because you just
have to `guix pull --commit=<sha>' where <sha> points to a Guix commit
owning the required packages.
And if I have correct, you can put that in a manifest and then
instantiate an environment for your local packages.

Instead of splitting off all of Python 2 into a separate channel, why
not just put the python2 packages which need to be removed.
Then nothing breaks and it provides a picture of how many python2
packages necessary to Guix are still there.


Speaking about channel, instead of GUIX_PACKAGE_PATH=~/work/guix/bimbs
you create the file ~/.config/guix/channels.scm containing:

(cons* (channel
        (name 'bimsb)
        (url "file:///home/simon/work/guix/bimsb")
        (branch "master"))
      %default-channels)

Then:

guix pull
guix package -i <your-package>

Here the url file:///home/simon/work/guix/bimsb is a clone of
https://github.com/BIMSBbioinfo/guix-bimsb
But you can directly specify Git repo online etc.


Hope that helps


All the best,
simon