[PATCH] don't show x-foo tags in search view

[Austin Clements]

The code looks good to me (two minor comments below), but, as David
pointed out, this needs a commit message.

Quoth James Vasile on Oct 30 at 10:57 am:
> Austin,
> 
> Thanks for the helpful comments.  I redid the patch to take a list of
> regexps.  That way users can banish different kinds of tags or simply
> list the tags themselves.  I've responded to your comments in text below
> the patch.
> 
> ---
>  emacs/notmuch.el |   26 +++++++++++++++++++++++++-
>  1 file changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/emacs/notmuch.el b/emacs/notmuch.el
> index f9454d8..05aa114 100644
> --- a/emacs/notmuch.el
> +++ b/emacs/notmuch.el
> @@ -775,6 +775,21 @@ non-authors is found, assume that all of the authors match."
>  	  (overlay-put overlay 'isearch-open-invisible #'delete-overlay)))
>        (insert padding))))
>  
> +  

Extra blank link inserted.

> +(defcustom notmuch-search-hide-tag-regexps '()
> +  "List of regular expressionss specifying tags to hide in search view.
> +
> +Notmuch will hide any tags in search view that match the regexps
> +specified in the list `notmuch-search-hide-tag-regexp`.  The
> +match is case-insensitive.
> +
> +If you are not comfortable with regular expressions, a list of
> +tag words will work, assuming those tags use only alphanumeric
> +characters.  An empty list will disable hiding of tags in search
> +view.  The list can be set via setq or the customize interface."

The last sentence isn't necessary.  This is true of virtually every
customize variable by design.

> +  :type '(repeat  regexp)
> +  :group 'notmuch-search)
> +
>  (defun notmuch-search-insert-field (field format-string result)
>    (cond
>     ((string-equal field "date")
> @@ -793,7 +808,16 @@ non-authors is found, assume that all of the authors match."
>      (notmuch-search-insert-authors format-string (plist-get result :authors)))
>  
>     ((string-equal field "tags")
> -    (let ((tags-str (mapconcat 'identity (plist-get result :tags) " ")))
> +    (let ((tags-str
> +	   (mapconcat 'identity
> +		      (let ((case-fold-search t))
> +			(remove-if
> +			 (lambda (tag)
> +			   (find tag notmuch-search-hide-tag-regexps
> +				 :test (lambda (tag regexp)
> +					 (string-match regexp tag))))
> +			 (plist-get result :tags)))
> +		      " ")))
>        (insert (propertize (format format-string tags-str)
>  			  'face 'notmuch-tag-face))))))
>