;;; guix-external.el --- External programs  -*- 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 auxiliary code for running external programs.

;;; Code:

(require 'cl-lib)
(require 'guix-config)

(defgroup guix-external nil
  "Settings for external programs."
  :group 'guix)

(defcustom guix-guile-program guix-config-guile-program
  "Name of the 'guile' executable used for Guix REPL.
May be either a string (the name of the executable) or a list of
strings of the form:

  (NAME . ARGS)

Where ARGS is a list of arguments to the guile program."
  :type 'string
  :group 'guix-external)

(defcustom guix-dot-program
  (if (file-name-absolute-p guix-config-dot-program)
      guix-config-dot-program
    (executable-find "dot"))
  "Name of the 'dot' executable."
  :type 'string
  :group 'guix-external)

(defcustom guix-dot-default-arguments
  '("-Tpng")
  "Default arguments for 'dot' program."
  :type '(repeat string)
  :group 'guix-external)

(defcustom guix-dot-file-name-function #'guix-png-file-name
  "Function used to define a file name of a temporary 'dot' file.
The function is called without arguments."
  :type '(choice (function-item guix-png-file-name)
                 (function :tag "Other function"))
  :group 'guix-external)

(defun guix-dot-arguments (output-file &rest args)
  "Return a list of dot arguments for writing a graph into OUTPUT-FILE.
If ARGS is nil, use `guix-dot-default-arguments'."
  (or guix-dot-program
      (error (concat "Couldn't find 'dot'.\n"
                     "Set guix-dot-program to a proper value")))
  (cl-list* guix-dot-program
            (concat "-o" output-file)
            (or args guix-dot-default-arguments)))

(defun guix-dot-file-name ()
  "Call `guix-dot-file-name-function'."
  (funcall guix-dot-file-name-function))

(defun guix-png-file-name ()
  "Return '.png' file name in the `temporary-file-directory'."
  (concat (make-temp-name
           (concat (file-name-as-directory temporary-file-directory)
                   "guix-emacs-graph-"))
          ".png"))

(provide 'guix-external)

;;; guix-external.el ends here
a3482e9fd9'>gnu: ashuffle: Update to 3.13.4.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-10-23 14:22:11 +0300'>2022-10-23</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=6530055df57eed2176b897711fe71ecb027c9268'>gnu: mpd: Update to 0.23.10.</a><span class='msg-avail'>...</span></td><td>kiasoc5</td></tr>
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<tr><td><span title='2022-10-12 21:14:12 +0200'>2022-10-12</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=4bc5383b3b79b9ee6d42b3a6770d2406035767eb'>gnu: mcg: Cleanup style.</a><span class='msg-avail'>...</span></td><td>Liliana Marie Prikler</td></tr>
<tr><td><span title='2022-10-12 21:12:38 +0200'>2022-10-12</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=24418eeb0077250bd79a45defc36d56a1dd8fe96'>gnu: mcg: Update to 3.1.</a><span class='msg-avail'>...</span></td><td>Simon Streit</td></tr>
<tr><td><span title='2022-10-12 21:09:33 +0200'>2022-10-12</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=df9f0ac2547894966b332f41627e9ac783304a54'>gnu: mcg: Use new input style.</a><span class='msg-avail'>...</span></td><td>Liliana Marie Prikler</td></tr>
<tr><td><span title='2022-09-10 17:23:32 +0200'>2022-09-10</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=a38f03e4deaccf79660c1b06b49f8f18bc0096d5'>gnu: Add mpdevil.</a><span class='msg-avail'>...</span></td><td>Liliana Marie Prikler</td></tr>
<tr><td><span title='2022-07-31 21:55:44 -0400'>2022-07-31</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=5f228543394244f479b6a460326fa5f1a4a40998'>gnu: qtmultimedia: Rename to qtmultimedia-5.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-07-31 21:55:43 -0400'>2022-07-31</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=1ef04fb2288dade3ad2883026ae286a68ef13a1e'>gnu: qtsvg: Rename variable to qtsvg-5.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-07-24 02:00:00 +0200'>2022-07-24</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=986df4ec0f28ec769873093c808c8895514f2d45'>gnu: ncmpc: Update to 0.47.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2022-07-24 02:00:00 +0200'>2022-07-24</span></td><td><a href='/guix/commit/gnu/packages/mpd.scm?id=06261a445adaf9d940651749e24dbcf8ee0b5402'>gnu: mpd: Update to 0.23.8.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>