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;;; pkgbuild.el --- PKGBUILD utility functions -*- lexical-binding: t; -*-
;; Copyright (C) 2014 Tom Willemse
;; Author: Tom Willemse <tom@ryuslash.org>
;; Keywords: convenience
;; This program 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.
;; This program 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:
;;
;;; Code:
(defun pkgbuild-find-checksums-boundaries ()
"Look in the current buffer for the start and end of the checksums."
(save-excursion
(goto-char (point-min))
(re-search-forward (rx (or "md5" "sha1" "sha256") "sums"))
(let ((start (match-beginning 0)))
(search-forward "(")
(backward-char)
(forward-sexp)
(list start (point)))))
(defun pkgbuild-get-updated-checksums ()
"Call `makepkg -g' to get the updated checksums."
(with-temp-buffer
(insert (shell-command-to-string "makepkg -g"))
(apply #'buffer-substring-no-properties
(pkgbuild-find-checksums-boundaries))))
;;;###autoload
(defun pkgbuild-update-checksums ()
"Find and update the checksums for the current buffer."
(interactive)
(let ((updated (pkgbuild-get-updated-checksums)))
(if updated
(progn
(apply #'delete-region (pkgbuild-find-checksums-boundaries))
(insert updated))
(error "No new checksums found"))))
(provide 'pkgbuild)
;;; pkgbuild.el ends here
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