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+;;; my-pacman.el -- pacman client -*- lexical-binding: t -*-
+
+;; Copyright (C) 2023 Free Software Foundation.
+
+;; Author: Yuchen Pei <id@ypei.org>
+;; Package-Requires: ((emacs "28.2"))
+
+;; This file is part of dotfiles.
+
+;; dotfiles is free software: you can redistribute it and/or modify it under
+;; the terms of the GNU Affero General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; dotfiles 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 Affero General
+;; Public License for more details.
+
+;; You should have received a copy of the GNU Affero General Public
+;; License along with dotfiles.  If not, see <https://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; pacman client.
+
+;;; Code:
+
+;;; a pacman client
+(defun my-grok-pacman (package)
+  (ignore-errors (kill-buffer "*pacman*"))
+  (if (= 0
+         (call-process-shell-command
+          (concat "pacman -Si " package) nil "*pacman*"))
+      (my-process-pacman-info
+       (my-parse-colon-separated-output "*pacman*"))
+    (error (format "Failed to find package %s!" package))))
+
+(defun my-process-pacman-info (info)
+  (list (cons "Description" (alist-get "Description" info nil nil 'string=))
+        (cons "Website" (alist-get "URL" info nil nil 'string=))
+        (cons "License" (alist-get "Licenses" info nil nil 'string=))
+        (cons "Pacman-package-name" (alist-get "Name" info nil nil 'string=))))
+
+(provide 'my-pacman)
+;;; my-pacman.el ends here