Re: [PATCH] emacs/show: add command to view a patch using diff mode

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+From: David Bremner <david@tethera.net>\r
+To: Mark Walters <markwalters1009@gmail.com>, notmuch@notmuchmail.org\r
+Subject: Re: [PATCH] emacs/show: add command to view a patch using diff mode\r
+In-Reply-To: <1355018749-12775-1-git-send-email-markwalters1009@gmail.com>\r
+References: <1354992232-21791-1-git-send-email-david@tethera.net>\r
+       <1355018749-12775-1-git-send-email-markwalters1009@gmail.com>\r
+User-Agent: Notmuch/0.18+13~g1adde01 (http://notmuchmail.org) Emacs/24.3.1\r
+       (x86_64-pc-linux-gnu)\r
+Date: Sun, 22 Jun 2014 07:51:09 -0300\r
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+\r
+Mark Walters <markwalters1009@gmail.com> writes:\r
+\r
+> From: markwalters1009@gmail.com\r
+>\r
+> This enables fast navigation between hunks and better highlighting.\r
+>\r
+> The use of notmuch-get-bodypart-internal could be improved; hard\r
+> coding to 1 seems to work for the output of git-format-patch. It also\r
+> not so nice to call (insert (notmuch-get-bodypart-internal ...)) since the\r
+> last thing n-g-b-i does is call buffer-string.\r
+>\r
+> Author: David Bremner <bremner@debian.org>\r
+\r
+Recently I had cause to update this function to produce more\r
+"git-format-patch" like output. I didn't yet merge with Mark's proposed\r
+changes. Here it is in case anyone else finds this useful (I used it to\r
+de-quoted-printable a patch).\r
+\r
+(defun notmuch-show-view-as-patch ()\r
+  "View the the current message as a patch."\r
+  (interactive)\r
+  (let* ((id (notmuch-show-get-message-id t))\r
+        (date (notmuch-show-get-date))\r
+        (from_ (concat "From " id " " date "\n"))\r
+        (from: (concat "From: " (notmuch-show-get-from) "\n"))\r
+        (date: (concat "Date: " date "\n"))\r
+        (subject (concat "Subject: " (notmuch-show-get-subject) "\n"))\r
+        (diff-default-read-only t)\r
+        (buf (get-buffer-create (concat "*notmuch-patch-" id "*"))))\r
+    (switch-to-buffer buf)\r
+    (let ((inhibit-read-only t))\r
+      (erase-buffer)\r
+      (insert from_)\r
+      (insert from:)\r
+      (insert date:)\r
+      (insert subject)\r
+      (insert "\n")\r
+      (insert (notmuch-get-bodypart-internal (concat "id:" id) 1 nil)))\r
+    (set-buffer-modified-p nil)\r
+    (diff-mode)\r
+    (goto-char (point-min))))\r