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;;; use-package-ensure-system-package.el --- auto install system packages -*- lexical-binding: t; -*-
;; Copyright (C) 2022-2024 Free Software Foundation, Inc.
;; Author: Justin Talbott <justin@waymondo.com>
;; Keywords: convenience, tools, extensions
;; URL: https://github.com/waymondo/use-package-ensure-system-package
;; Package-Requires: ((use-package "2.1") (system-packages "1.0.4"))
;; Filename: use-package-ensure-system-package.el
;; This file is part of GNU Emacs.
;; GNU Emacs 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 Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; The `:ensure-system-package` keyword allows you to ensure system
;; binaries exist alongside your `use-package` declarations. Using it
;; requires the `system-packages' package to be installed (available
;; on GNU ELPA).
;;
;; See the `use-package' info manual for more information.
;;; Code:
(require 'use-package)
(require 'system-packages nil t)
(eval-when-compile
(declare-function system-packages-get-command "system-packages"))
(defvar use-package-ensure-system-package--custom-packages '()
"List of commands used to install custom packages.")
(defun use-package-ensure-system-package-consify (arg)
"Turn ARG into a cons of the form (PACKAGE-NAME . INSTALL-COMMAND')."
(cond
((stringp arg)
(cons arg `(system-packages-install ,arg)))
((symbolp arg)
(cons arg `(system-packages-install ,(symbol-name arg))))
((consp arg)
(cond
((not (cdr arg))
(use-package-ensure-system-package-consify (car arg)))
((stringp (cdr arg))
(progn
(push (cdr arg) use-package-ensure-system-package--custom-packages)
(cons (car arg) `(async-shell-command ,(cdr arg)))))
(t
(cons (car arg)
`(system-packages-install ,(symbol-name (cdr arg)))))))))
(defun use-package-ensure-system-package-update-custom-packages ()
"Update custom packages (not installed by system package manager).
Run the same commands used for installing them."
(interactive)
(dolist (cmd use-package-ensure-system-package--custom-packages)
(async-shell-command cmd)))
;;;###autoload
(defun use-package-normalize/:ensure-system-package (_name-symbol keyword args)
"Turn ARGS into a list of conses of the form (PACKAGE-NAME . INSTALL-COMMAND)."
(use-package-as-one (symbol-name keyword) args
(lambda (_label arg)
(cond
((and (listp arg) (listp (cdr arg)))
(mapcar #'use-package-ensure-system-package-consify arg))
(t
(list (use-package-ensure-system-package-consify arg)))))))
(defun use-package-ensure-system-package-exists? (file-or-exe)
"If FILE-OR-EXE is a string, ensure the file path exists.
If it is a symbol, ensure the binary exist."
(if (stringp file-or-exe)
(file-exists-p file-or-exe)
(executable-find (symbol-name file-or-exe))))
;;;###autoload
(defun use-package-handler/:ensure-system-package (name _keyword arg rest state)
"Execute the handler for `:ensure-system-package' keyword in `use-package'."
(let ((body (use-package-process-keywords name rest state)))
(use-package-concat
(mapcar #'(lambda (cons)
`(unless (use-package-ensure-system-package-exists? ',(car cons))
,(cdr cons))) arg)
body)))
(add-to-list 'use-package-keywords :ensure-system-package t)
(provide 'use-package-ensure-system-package)
;;; use-package-ensure-system-package.el ends here
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