73 lines
2.3 KiB
EmacsLisp
73 lines
2.3 KiB
EmacsLisp
;;; 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:
|
|
|
|
(defgroup guix-external nil
|
|
"Settings for external programs."
|
|
:group 'guix)
|
|
|
|
(defcustom guix-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")))
|
|
(apply #'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)
|
|
"graph-"))
|
|
".png"))
|
|
|
|
(provide 'guix-external)
|
|
|
|
;;; guix-external.el ends here
|