--- /dev/null
+;;; patch.el --- mail/apply a patch
+
+;; Copyright (C) 2001, 2006 Free Software Foundation, Inc.
+
+;; 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 2, 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; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Author: Thien-Thi Nguyen <ttn@gnu.org>
+;;; Version: 1
+;;; Favorite-Favorite: Favorite-Favorite
+
+;;; Commentary:
+
+;; This file has two symmetrical usage modes, for patch creation and
+;; application, respectively. The details are somewhat tuned for Guile
+;; maintenance; probably we should generalize it a bit and add it to
+;; Emacs proper at some point in the future. Long live free software!
+;;
+;; On the patch creation side of things, there are various version
+;; control systems that are happy to write a diff to stdout (and
+;; numerous Emacs interfaces to them all). Thus, we provide only a
+;; simple `patch-send' that composes mail from the current buffer;
+;; the contents of that buffer are left as an exercise for the patch
+;; creator. When preparing the mail, `patch-send' scans the patch
+;; for standard filename headers and sets up a skeleton change log --
+;; filling this in is a good way to earn respect from maintainers (hint
+;; hint). Type `C-c C-c' to send the mail when you are done. (See
+;; `compose-mail' for more info.)
+;;
+;; TODO: Write/document patch-apply side of things.
+;; TODO: Integrate w/ `ediff-patch-buffer' et al.
+
+;;; Code:
+
+(require 'cl)
+(require 'update-changelog) ; for stitching
+
+;; outgoing
+
+(defvar patch-greeting "hello guile maintainers,\n\n"
+ "*String to insert at beginning of patch mail.")
+
+(defun patch-scan-files ()
+ (let (files)
+ (save-excursion
+ (while (re-search-forward "^[+][+][+] \\(\\S-+\\)" (point-max) t)
+ (setq files (cons (cons (match-string 1)
+ (match-beginning 0))
+ files))))
+ (reverse files)))
+
+(defun patch-common-prefix (filenames)
+ (let* ((first-file (car filenames))
+ (prefix (and first-file (file-name-directory first-file))))
+ (while (and prefix
+ (not (string= "" prefix))
+ (not (every (lambda (filename)
+ (string-match (concat "^" prefix) filename))
+ filenames)))
+ (setq prefix (file-name-directory (substring prefix 0 -1))))
+ prefix))
+
+(defun patch-changelog-skeleton ()
+ (let* ((file-info (patch-scan-files))
+ (fullpath-files (mapcar 'car file-info))
+ (cut (length (patch-common-prefix fullpath-files)))
+ (files (mapcar (lambda (fullpath-file)
+ (substring fullpath-file cut))
+ fullpath-files)))
+ (mapconcat
+ (lambda (file)
+ (concat (make-string (length file) ?_) "\n" file "\n[writeme]"))
+ files
+ "\n")))
+
+(defun patch-send (buffer subject)
+ (interactive "bBuffer: \nsSubject: ")
+ (when (string= "" subject)
+ (error "(empty subject)"))
+ (compose-mail "bug-guile@gnu.org" subject)
+ (insert (with-current-buffer buffer (buffer-string)))
+ (mail-text)
+ (insert patch-greeting)
+ (save-excursion
+ (insert "here is a patch ... [overview/observations/etc]\n\n"
+ (patch-changelog-skeleton) "\n\n\n"
+ (make-string 72 ?_) "\n")))
+
+;; incoming
+
+
+
+
+;;; patch.el ends here