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+;;; guix-devel.el --- Development tools -*- lexical-binding: t -*-
+
+;; Copyright © 2015 Alex Kost <alezost@gmail.com>
+
+;; This file is part of GNU Guix.
+
+;; GNU Guix is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Guix is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This file provides commands useful for developing Guix (or even
+;; arbitrary Guile code) with Geiser.
+
+;;; Code:
+
+(require 'guix-guile)
+(require 'guix-geiser)
+(require 'guix-utils)
+
+(defgroup guix-devel nil
+ "Settings for Guix development utils."
+ :group 'guix)
+
+(defcustom guix-devel-activate-mode t
+ "If non-nil, then `guix-devel-mode' is automatically activated
+in Scheme buffers."
+ :type 'boolean
+ :group 'guix-devel)
+
+(defun guix-devel-use-modules (&rest modules)
+ "Use guile MODULES."
+ (apply #'guix-geiser-call "use-modules" modules))
+
+(defun guix-devel-use-module (&optional module)
+ "Use guile MODULE in the current Geiser REPL.
+MODULE is a string with the module name - e.g., \"(ice-9 match)\".
+Interactively, use the module defined by the current scheme file."
+ (interactive (list (guix-guile-current-module)))
+ (guix-devel-use-modules module)
+ (message "Using %s module." module))
+
+(defun guix-devel-copy-module-as-kill ()
+ "Put the name of the current guile module into `kill-ring'."
+ (interactive)
+ (guix-copy-as-kill (guix-guile-current-module)))
+
+(defvar guix-devel-keys-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map (kbd "k") 'guix-devel-copy-module-as-kill)
+ (define-key map (kbd "u") 'guix-devel-use-module)
+ map)
+ "Keymap with subkeys for `guix-devel-mode-map'.")
+
+(defvar guix-devel-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map (kbd "C-c .") guix-devel-keys-map)
+ map)
+ "Keymap for `guix-devel-mode'.")
+
+;;;###autoload
+(define-minor-mode guix-devel-mode
+ "Minor mode for `scheme-mode' buffers.
+
+With a prefix argument ARG, enable the mode if ARG is positive,
+and disable it otherwise. If called from Lisp, enable the mode
+if ARG is omitted or nil.
+
+When Guix Devel mode is enabled, it provides the following key
+bindings:
+
+\\{guix-devel-mode-map}"
+ :init-value nil
+ :lighter " Guix"
+ :keymap guix-devel-mode-map)
+
+;;;###autoload
+(defun guix-devel-activate-mode-maybe ()
+ "Activate `guix-devel-mode' depending on
+`guix-devel-activate-mode' variable."
+ (when guix-devel-activate-mode
+ (guix-devel-mode)))
+
+(provide 'guix-devel)
+
+;;; guix-devel.el ends here