emacs: Add 'guix-lint-checker-names'.

* emacs/guix-main.scm: Use (guix scripts lint) module.
  (lint-checker-names): New procedure.
* emacs/guix-base.el (guix-lint-checker-names): New function.

emacs/guix-base.el

 ;;; guix-base.el --- Common definitions   -*- lexical-binding: t -*-
 
-;; Copyright © 2014 Alex Kost <alezost@gmail.com>
+;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com>
 
 ;; This file is part of GNU Guix.
 
@@ -180,6 +180,13 @@ If PATH is relative, it is considered to be relative to
         (guix-find-location loc)
       (message "Couldn't find package location."))))
 
+
+;;; Receivable lists of packages, lint checkers, etc.
+
+(guix-memoized-defun guix-lint-checker-names ()
+  "Return a list of names of available lint checkers."
+  (guix-eval-read (guix-make-guile-expression 'lint-checker-names)))
+
 
 ;;; Buffers and auto updating.
 

emacs/guix-main.scm

 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014 Alex Kost <alezost@gmail.com>
+;;; Copyright © 2014, 2015 Alex Kost <alezost@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -57,6 +57,7 @@
  (guix licenses)
  (guix utils)
  (guix ui)
+ (guix scripts lint)
  (guix scripts package)
  (guix scripts pull)
  (gnu packages))
@@ -927,3 +928,12 @@ (define* (package-source-build-derivation package-id #:key dry-run?
           (build-derivations store derivations))
         (format #t "The source store path: ~a~%"
                 (package-source-derivation->store-path derivation))))))
+
+
+;;; Lists of packages, lint checkers, etc.
+
+(define (lint-checker-names)
+  "Return a list of names of available lint checkers."
+  (map (lambda (checker)
+         (symbol->string (lint-checker-name checker)))
+       %checkers))