Add some PKGBUILD utility functions

1 files changed, 57 insertions, 0 deletions

diff --git a/.emacs.d/site-lisp/pkgbuild.el b/.emacs.d/site-lisp/pkgbuild.el
new file mode 100644
index 0000000..e9e33bf
--- /dev/null
+++ b/.emacs.d/site-lisp/pkgbuild.el
@@ -0,0 +1,57 @@
+;;; 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 "\\(md5\\|sha1\\)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