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;;; guix-ui-license.el --- Interface for displaying licenses
;; Copyright © 2016 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 'list'/'info' interface for displaying licenses of
;; Guix packages.
;;; Code:
(require 'guix-buffer)
(require 'guix-list)
(require 'guix-info)
(require 'guix-backend)
(require 'guix-guile)
(guix-define-entry-type license)
(defun guix-license-get-entries (search-type &rest args)
"Receive 'license' entries.
SEARCH-TYPE may be one of the following symbols: `all', `id', `name'."
(guix-eval-read
(apply #'guix-make-guile-expression
'license-entries search-type args)))
(defun guix-license-get-display (search-type &rest args)
"Search for licenses and show results."
(apply #'guix-list-get-display-entries
'license search-type args))
(defun guix-license-message (entries search-type &rest args)
"Display a message after showing license ENTRIES."
;; Some objects in (guix licenses) module are procedures (e.g.,
;; 'non-copyleft' or 'x11-style'). Such licenses cannot be "described".
(when (null entries)
(if (cdr args)
(message "Unknown licenses.")
(message "Unknown license."))))
;;; License 'info'
(guix-info-define-interface license
:buffer-name "*Guix License Info*"
:get-entries-function 'guix-license-get-entries
:message-function 'guix-license-message
:format '((name ignore (simple guix-info-heading))
ignore
guix-license-insert-packages-button
(url ignore (simple guix-url))
guix-license-insert-comment)
:titles '((url . "URL")))
(declare-function guix-packages-by-license "guix-ui-package")
(defun guix-license-insert-packages-button (entry)
"Insert button to display packages by license ENTRY."
(let ((license (guix-entry-value entry 'name)))
(guix-info-insert-action-button
"Packages"
(lambda (btn)
(guix-packages-by-license (button-get btn 'license)))
(format "Display packages with license '%s'" license)
'license license)))
(defun guix-license-insert-comment (entry)
"Insert 'comment' of a license ENTRY."
(let ((comment (guix-entry-value entry 'comment)))
(if (and comment
(string-match-p "^http" comment))
(guix-info-insert-value-simple comment 'guix-url)
(guix-info-insert-title-simple
(guix-info-param-title 'license 'comment))
(guix-info-insert-value-indent comment))))
;;; License 'list'
(guix-list-define-interface license
:buffer-name "*Guix Licenses*"
:get-entries-function 'guix-license-get-entries
:describe-function 'guix-license-list-describe
:message-function 'guix-license-message
:format '((name nil 40 t)
(url guix-list-get-url 50 t))
:titles '((name . "License"))
:sort-key '(name))
(let ((map guix-license-list-mode-map))
(define-key map (kbd "RET") 'guix-license-list-show-packages))
(defun guix-license-list-describe (ids)
"Describe licenses with IDS (list of identifiers)."
(guix-buffer-display-entries
(guix-entries-by-ids ids (guix-buffer-current-entries))
'info 'license (cl-list* 'id ids) 'add))
(defun guix-license-list-show-packages ()
"Display packages with the license at point."
(interactive)
(guix-packages-by-license (guix-list-current-id)))
;;; Interactive commands
;;;###autoload
(defun guix-licenses ()
"Display licenses of the Guix packages."
(interactive)
(guix-license-get-display 'all))
(provide 'guix-ui-license)
;;; guix-ui-license.el ends here
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