Date: Thu, 29 Mar 2012 01:38:33 -0400
From: Austin Clements <amdragon@MIT.EDU>
To: Adam Wolfe Gordon <awg+notmuch@xvx.ca>
Subject: Re: [BUG/PATCH] emacs: Fix header problem in reply for emacs 23.2
Message-ID: <20120329053833.GB2670@mit.edu>
References: <87obrh3ufi.fsf@nikula.org>
	<1332943338-9708-1-git-send-email-awg+notmuch@xvx.ca>
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Cc: notmuch@notmuchmail.org
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Quoth Adam Wolfe Gordon on Mar 28 at  8:02 am:
> The new reply code used strings instead of symbols for header names,
> which message-mail is OK with on emacs 23.3, but not 23.2. The symptom
> is that on 23.2 (and presumably on earlier versions) the reply message
> would end up with two of some headers.
> 
> This fixes the problem by converting the header names to symbols of
> the type message.el usually expects before passing the headers to
> message-mail.
> ---
>  emacs/notmuch-lib.el |    5 ++++-
>  emacs/notmuch-mua.el |   10 +++++-----
>  2 files changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
> index c146748..af46611 100644
> --- a/emacs/notmuch-lib.el
> +++ b/emacs/notmuch-lib.el
> @@ -232,9 +232,12 @@ the given type."
>    (or (plist-get part :content)
>        (notmuch-get-bodypart-internal (concat "id:" (plist-get msg :id)) nth process-crypto)))
>  
> +;; Converts a plist of headers to an alist of headers. The input plist should
> +;; have symbols of the form :Header as keys, and the resulting alist will have
> +;; symbols of the form 'Header as keys.
>  (defun notmuch-plist-to-alist (plist)

This name isn't really appropriate now.
notmuch-plist-to-headers-list?  notmuch-headers-plist-to-alist?

Otherwise LGTM, though I don't run such ancient versions of Emacs, so
I can't verify that it fixes the problem.

>    (loop for (key value . rest) on plist by #'cddr
> -	collect (cons (substring (symbol-name key) 1) value)))
> +	collect (cons (intern (substring (symbol-name key) 1)) value)))
>  
>  ;; Compatibility functions for versions of emacs before emacs 23.
>  ;;
> diff --git a/emacs/notmuch-mua.el b/emacs/notmuch-mua.el
> index 9805d79..24918d3 100644
> --- a/emacs/notmuch-mua.el
> +++ b/emacs/notmuch-mua.el
> @@ -185,11 +185,11 @@ OTHER-ARGS are passed through to `message-mail'."
>    (when notmuch-mua-user-agent-function
>      (let ((user-agent (funcall notmuch-mua-user-agent-function)))
>        (when (not (string= "" user-agent))
> -	(push (cons "User-Agent" user-agent) other-headers))))
> +	(push (cons 'User-Agent user-agent) other-headers))))
>  
> -  (unless (assoc "From" other-headers)
> -    (push (cons "From" (concat
> -			(notmuch-user-name) " <" (notmuch-user-primary-email) ">")) other-headers))
> +  (unless (assq 'From other-headers)
> +    (push (cons 'From (concat
> +		       (notmuch-user-name) " <" (notmuch-user-primary-email) ">")) other-headers))
>  
>    (apply #'message-mail to subject other-headers other-args)
>    (message-sort-headers)
> @@ -250,7 +250,7 @@ the From: address first."
>    (interactive "P")
>    (let ((other-headers
>  	 (when (or prompt-for-sender notmuch-always-prompt-for-sender)
> -	   (list (cons "From" (notmuch-mua-prompt-for-sender))))))
> +	   (list (cons 'From (notmuch-mua-prompt-for-sender))))))
>      (notmuch-mua-mail nil nil other-headers)))
>  
>  (defun notmuch-mua-new-forward-message (&optional prompt-for-sender)