[PATCH] emacs: create patch filename from subject for inline patch fake parts

[Jani Nikula]

Shameless promotion of own patches... I suppose not many use the
notmuch-wash-convert-inline-patch-to-part option, but with this patch
I've actually started to like it better. An actual patch name from
subject instead of "inline patch".

As I said, the lisp is less than perfect here, but this is still better
than what's existing.

Any comments?


BR,
Jani.


On Sat, 19 Nov 2011 01:02:48 +0200, Jani Nikula <jani at nikula.org> wrote:
> 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', just without the leading numbers.
> 
> Signed-off-by: Jani Nikula <jani at nikula.org>
> 
> ---
> 
> I know notmuch-subject-to-patch-filename is totally un-lispy. Suggestions
> welcome on how to make it lispy and keep it somewhat readable.
> 
> If we later want to have a '>' counterpart to '|' to save messages to files
> rather than pipe, then this could be generalized and re-used for creating
> the suggested filename for that.
> 
> I don't even use the notmuch-wash-convert-inline-patch-to-part option that
> much, but having it suggest "inline patch" as filename is just ugly...
> ---
>  emacs/notmuch-wash.el |   16 +++++++++++++++-
>  1 files changed, 15 insertions(+), 1 deletions(-)
> 
> diff --git a/emacs/notmuch-wash.el b/emacs/notmuch-wash.el
> index 1f420b2..755d64a 100644
> --- a/emacs/notmuch-wash.el
> +++ b/emacs/notmuch-wash.el
> @@ -290,6 +290,17 @@ When doing so, maintaining citation leaders in the wrapped text."
>  
>  (defvar diff-file-header-re) ; From `diff-mode.el'.
>  
> +(defun notmuch-subject-to-patch-filename (str)
> +  "Convert a typical patch mail subject line into a suitable filename."
> +  (let ((s str))
> +    (setq s (replace-regexp-in-string "^ *\\(\\[[^]]*\\]\\)? *" "" s))
> +    (setq s (replace-regexp-in-string "[. ]*$" "" s))
> +    (setq s (replace-regexp-in-string "[^A-Za-z0-9._-]+" "-" s))
> +    (setq s (replace-regexp-in-string "\\.+" "." s))
> +    (when (> (length s) 52)
> +      (setq s (substring s 0 52)))
> +    (concat s ".patch")))
> +
>  (defun notmuch-wash-convert-inline-patch-to-part (msg depth)
>    "Convert an inline patch into a fake 'text/x-diff' attachment.
>  
> @@ -316,7 +327,10 @@ for error."
>  	    (setq part (plist-put part :content-type "text/x-diff"))
>  	    (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-subject-to-patch-filename
> +				   (plist-get
> +				    (plist-get msg :headers) :Subject))))
>  	    (delete-region (point-min) (point-max))
>  	    (notmuch-show-insert-bodypart nil part depth))))))
>  
> -- 
> 1.7.5.4
>