[PATCH 0/6] emacs: Add "M-x guix-system-generations".

[Alex Kost]

This patchset adds commands for displaying system generations — an
emacs analog of 'guix system list-generations' shell command.  The
interface is the same as for "M-x guix-generations", i.e. you can look
at installed "system" packages (by pressing RET on a generation), or
compare 2 generations by pressing "=".

Patches:

[PATCH 1/6] guix system: Export <boot-parameters> accessors.

  I just exported this stuff, but perhaps it would be better to move it
  from (guix scripts system) to another module.

[PATCH 2/6] emacs: profiles: Add 'guix-system-profile'.

[PATCH 3/6] emacs: Find packages in system profiles.
[PATCH 4/6] emacs: Replace 'generation-diff' search with 'profile-diff'.
[PATCH 5/6] emacs: Remove 'generation' search type.

  These 3 patches are for some internal changes, related to the fact
  that system packages are installed in "system-NN-link/profile", while
  user packages are installed in "guix-profile-NN-link".

[PATCH 6/6] emacs: Add interface for system generations.

  Is it OK to update 'NEWS' file in this patch?