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emacs: create patch filename from subject for inline patch fake parts

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Use the mail subject line for creating a descriptive filename for the wash
generated inline patch fake parts. The names are similar to the ones
created by 'git format-patch'.

If the user has notmuch-wash-convert-inline-patch-to-part hook enabled in
notmuch-show-insert-text/plain-hook, this will change the old default
filename of "inline patch" in fake parts:

[ inline patch: inline patch (as text/x-diff) ]

into, for example:

[ 0002-emacs-create-patch-filename-from-subject-for-inline.patch: inline patch (as text/x-diff) ]

which is typically the same filename the sender had if he was using 'git
format-patch' and 'git send-email'.

Signed-off-by: Jani Nikula <jani@nikula.org>
This commit is contained in:
Jani Nikula 2011-12-27 18:04:39 +02:00 committed by David Bremner
parent d5d39a92f1
commit f893d31762
1 changed files with 42 additions and 1 deletions
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43
emacs/notmuch-wash.el
View file

@ -290,6 +290,44 @@ When doing so, maintaining citation leaders in the wrapped text."
(defvar diff-file-header-re) ; From `diff-mode.el'.
(defun notmuch-wash-subject-to-filename (subject &optional maxlen)
"Convert a mail SUBJECT into a filename.
The resulting filename is similar to the names generated by \"git
format-patch\", without the leading patch sequence number
\"0001-\" and \".patch\" extension. Any leading \"[PREFIX]\"
style strings are removed prior to conversion.
Optional argument MAXLEN is the maximum length of the resulting
filename, before trimming any trailing . and - characters."
(let* ((s (replace-regexp-in-string "^ *\\(\\[[^]]*\\] *\\)*" "" subject))
(s (replace-regexp-in-string "[^A-Za-z0-9._]+" "-" s))
(s (replace-regexp-in-string "\\.+" "." s))
(s (if maxlen (substring s 0 (min (length s) maxlen)) s))
(s (replace-regexp-in-string "[.-]*$" "" s)))
s))
(defun notmuch-wash-subject-to-patch-sequence-number (subject)
"Convert a patch mail SUBJECT into a patch sequence number.
Return the patch sequence number N from the last \"[PATCH N/M]\"
style prefix in SUBJECT, or nil if such a prefix can't be found."
(when (string-match
"^ *\\(\\[[^]]*\\] *\\)*\\[[^]]*?\\([0-9]+\\)/[0-9]+[^]]*\\].*"
subject)
(string-to-number (substring subject (match-beginning 2) (match-end 2)))))
(defun notmuch-wash-subject-to-patch-filename (subject)
"Convert a patch mail SUBJECT into a filename.
The resulting filename is similar to the names generated by \"git
format-patch\". If the patch mail was generated and sent using
\"git format-patch/send-email\", this should re-create the
original filename the sender had."
(format "%04d-%s.patch"
(or (notmuch-wash-subject-to-patch-sequence-number subject) 1)
(notmuch-wash-subject-to-filename subject 52)))
(defun notmuch-wash-convert-inline-patch-to-part (msg depth)
"Convert an inline patch into a fake 'text/x-diff' attachment.
@ -316,7 +354,10 @@ for error."
(setq part (plist-put part :content-type "inline-patch-fake-part"))
(setq part (plist-put part :content (buffer-string)))
(setq part (plist-put part :id -1))
(setq part (plist-put part :filename "inline patch"))
(setq part (plist-put part :filename
(notmuch-wash-subject-to-patch-filename
(plist-get
(plist-get msg :headers) :Subject))))
(delete-region (point-min) (point-max))
(notmuch-show-insert-bodypart nil part depth))))))