[PATCH] guix package: Export generation procedures.

[Alex Kost]

Ludovic Courtès (2014-08-22 12:56 +0400) wrote:

> Alex Kost <address@hidden> skribis:
>
>> Also I would like to add support for deleting generations (to
>> "guix.el"), so I think it would be good to export ‘delete-generation’
>> from "scripts/package.scm".  WDYT?
>
> Yes, that makes sense, one could use it from the *Guix Generation List*
> buffer.

What about the attached patch?  Some comments and questions:

- I added 'store' argument to the exported procedures, however it is
  used only in one particular case: when we need to create an empty
  profile (i.e. to call ‘link-to-empty-profile’).  Is there a way to
  avoid using 'store' argument there or is it fine to leave it like
  this?

- I actually need only ‘delete-generations’ procedure for Emacs UI, but
  I think other procedures are also worth to be exported or not?

- Perhaps there is a better place for those functions than
  (guix scripts package)?

- (Not related to this patch, but still …)  Currently with “roll-back”,
  we can only switch to the previous generation.  What about adding a
  possibility to switch to any generation?  So that we could use
  something like this:

    guix package --switch-generation=7

  Also such functionality can be added to Emacs UI: for example pressing
  "C" on a generation in *Guix Generation List* will make this
  generation the current one.

  So ‘roll-back’ procedure may become a special case of the
  ‘switch-generation’ one.  WDYT?

0001-guix-package-Export-generation-procedures.patch
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