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;;; guix-entry.el --- 'Entry' type -*- 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 an API for 'entry' type which is just an alist of
;; KEY/VALUE pairs (KEY should be a symbol) with the required 'id' KEY.
;;; Code:
(require 'cl-lib)
(require 'guix-utils)
(defalias 'guix-entry-value #'guix-assq-value)
(defun guix-entry-id (entry)
"Return ENTRY ID."
(guix-entry-value entry 'id))
(defun guix-entry-by-id (id entries)
"Return an entry from ENTRIES by its ID."
(cl-find-if (lambda (entry)
(equal (guix-entry-id entry) id))
entries))
(defun guix-entries-by-ids (ids entries)
"Return entries with IDS (a list of identifiers) from ENTRIES."
(cl-remove-if-not (lambda (entry)
(member (guix-entry-id entry) ids))
entries))
(defun guix-replace-entry (id new-entry entries)
"Replace an entry with ID from ENTRIES by NEW-ENTRY.
Return a list of entries with the replaced entry."
(cl-substitute-if new-entry
(lambda (entry)
(equal id (guix-entry-id entry)))
entries
:count 1))
(provide 'guix-entry)
;;; guix-entry.el ends here
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