Reported by Christopher Allan Webber <cwebber@dustycloud.org> on #guix.
Several modules use the code from 'guix-profiles' without requiring it. It
was never noticed before commits e4e2154644
and 13fe4891fa, because 'guix-emacs' required
this module. But now, when 'site-start.el' loads 'guix-emacs',
'guix-profiles' may not exist yet, so it may not be required. This will
lead to an error when some of "M-x guix-..." commands will be used. See
<https://gnunet.org/bot/log/guix/2016-02-03#T898859>.
* emacs/guix-base.el: Require 'guix-profiles'.
* emacs/guix-ui.el: Likewise.
* emacs/guix-ui-generation.el: Likewise.
* emacs/guix-ui-package.el: Likewise.
* emacs/guix-ui.el (guix-ui-read-profile): New procedure.
* emacs/guix-ui-package.el (guix-search-by-name)
(guix-search-by-regexp, guix-installed-packages)
(guix-obsolete-packages, guix-all-available-packages)
(guix-newest-available-packages): Use it.
* emacs/guix-ui-generation.el (guix-generations)
(guix-last-generations, guix-generations-by-time): Use it.
* emacs/guix-buffer.el (guix-define-groups, guix-define-entry-type)
(guix-define-buffer-type): New macros.
(guix-buffer-define-interface): Add parent groups for the generated
custom groups.
* emacs/guix-info.el: Use 'guix-define-buffer-type' to generate custom
groups.
* emacs/guix-list.el: Likewise.
* emacs/guix-ui.el: Use 'guix-define-groups' to generate custom groups.
(guix-ui-define-entry-type): New macro.
* emacs/guix-ui-package.el: Use it.
* emacs/guix-ui-generation.el: Use it.
Make a root 'guix-buffer-define-interface' macro. It should generate a
common code for any type of interface. Inherit 'guix-info-define-interface'
and 'guix-list-define-interface' from it. They should provide a general
'info'/'list' interface for any data. Finally, make
'guix-ui-define-interface' for the common code for interfaces to Guix
packages and generations, and inherit 'guix-ui-info-define-interface' and
'guix-ui-list-define-interface' from it.
* emacs/guix-base.el (guix-define-buffer-type): Rename to...
(guix-buffer-define-interface): ... this. Rename internal
variables ('buf-' -> 'buffer-'). Move ':required' keyword to
'guix-ui-define-interface'.
* emacs/guix-info.el (guix-info-define-interface): New macro.
(guix-info-font-lock-keywords): New variable.
* emacs/guix-list.el (guix-list-define-entry-type): Rename to...
(guix-list-define-interface): ... this.
(guix-list-font-lock-keywords): New variable.
(guix-list-describe-ids): Move and rename to...
* emacs/guix-ui.el: New file.
(guix-ui-list-describe): ... this.
(guix-ui-define-interface, guix-ui-info-define-interface)
(guix-ui-list-define-interface): New macros.
(guix-ui-font-lock-keywords): New variable.
* emacs.am (ELFILES): Add "emacs/guix-ui.el"
Alex Kost