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;;; use-package-ensure-system-package.el --- auto install system packages -*- lexical: t; -*-
;; Copyright (C) 2017 Justin Talbott
;; Author: Justin Talbott <justin@waymondo.com>
;; Keywords: convenience, tools, extensions
;; URL: https://github.com/waymondo/use-package-ensure-system-package
;; Version: 0.1
;; Package-Requires: ((use-package "2.1") (system-packages "0.1"))
;; Filename: use-package-ensure-system-package.el
;; License: GNU General Public License version 3, or (at your option) any later version
;;
;;; Commentary:
;;
;; The `:ensure-system-package` keyword allows you to ensure system
;; binaries exist alongside your `use-package` declarations.
;;
;;; Code:
(require 'use-package)
(require 'system-packages nil t)
(eval-when-compile
(defvar system-packages-package-manager)
(defvar system-packages-supported-package-managers)
(defvar system-packages-use-sudo))
(defun use-package-ensure-system-package-install-command (pack)
"Return the default install command for PACK."
(let ((command
(cdr (assoc 'install (cdr (assoc system-packages-package-manager
system-packages-supported-package-managers))))))
(unless command
(error (format "%S not supported in %S" 'install system-packages-package-manager)))
(unless (listp command)
(setq command (list command)))
(when system-packages-use-sudo
(setq command (mapcar (lambda (part) (concat "sudo " part)) command)))
(setq command (mapconcat 'identity command " && "))
(mapconcat 'identity (list command pack) " ")))
(defun use-package-ensure-system-package-consify (arg)
"Turn `arg' into a cons of (`package-name' . `install-command')."
(cond
((stringp arg)
(cons arg (use-package-ensure-system-package-install-command arg)))
((symbolp arg)
(cons arg (use-package-ensure-system-package-install-command (symbol-name arg))))
((consp arg) arg)))
;;;###autoload
(defun use-package-normalize/:ensure-system-package (name-symbol keyword args)
"Turn `arg' into a list of cons-es of (`package-name' . `install-command')."
(use-package-only-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)))))))
;;;###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 (executable-find (symbol-name ',(car cons)))
(async-shell-command ,(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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