;;; 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
'/guix/commit/gnu/system/linux-initrd.scm?id=0dc019e19a23fea614be5623360849ab9bc35e74'>initrd: Use non-hyphenated kernel command-line parameter names.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-02-09 01:38:51 -0500'>2022-02-09</span></td><td><a href='/guix/commit/gnu/system/linux-initrd.scm?id=fd6cfbc05ac093a6b9497e6c38bb4678f33ac14d'>Revert kernel modules changes to support the Coreboot framebuffer</a><span class='msg-avail'>...</span></td><td>Leo Famulari</td></tr>
<tr><td><span title='2021-12-25 07:20:00 +0100'>2021-12-25</span></td><td><a href='/guix/commit/gnu/system/linux-initrd.scm?id=1dfe8c372163d481ebebb97dd3b4cafa49906b28'>gnu: linux-libre: Build simplefb into all x86{,_64} kernels.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-12-16 12:53:52 -0500'>2021-12-16</span></td><td><a href='/guix/commit/gnu/system/linux-initrd.scm?id=bc09e7ab569d5306ce99c5525150695c9d539ef0'>gnu: linux-libre: Support the Coreboot framebuffer.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice via Guix-patches via</td></tr>
<tr><td><span title='2021-10-13 01:20:19 +0200'>2021-10-13</span></td><td><a href='/guix/commit/gnu/system/linux-initrd.scm?id=ec46a5338d60eb6714a47b67e0d1e92079412d73'>linux-initrd: Support checking NTFS volumes on boot.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-09-23 18:17:17 +0200'>2021-09-23</span></td><td><a href='/guix/commit/gnu/system/linux-initrd.scm?id=cd19c920b7bf15af6b8ea06aa5021487d65773a6'>linux-initrd: Support XFS.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-09-23 18:17:16 +0200'>2021-09-23</span></td><td><a href='/guix/commit/gnu/system/linux-initrd.scm?id=15489291d93bcd67e30eed686da0d58050ce1c0e'>linux-initrd: Include only the single ‘bcachefs’ binary.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-09-23 18:17:16 +0200'>2021-09-23</span></td><td><a href='/guix/commit/gnu/system/linux-initrd.scm?id=68b219b9f482f09e7c55aaee4b64222d8c86172a'>gnu: Don't abuse check-btrfs-file-system to scan.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>