From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kyle Meyer <kyle@kyleam.com>
Subject: bug#28999: 25.3.50; org export : exclude-tags not working with
 org-export-filter-options-functions
Date: Wed, 25 Oct 2017 13:59:29 -0400
Message-ID: <87zi8f2jni.fsf@kyleam.com>
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To: Michel Damiens <michel.damiens@gmail.com>
Cc: 28999@debbugs.gnu.org

Michel Damiens <michel.damiens@gmail.com> writes:

> Adding :
>
> (defun my-org-export-change-options (plist backend)
>     (cond 
>       ((equal backend 'html)
>        (plist-put plist :exclude-tags "NOHTML")
>        (plist-put plist :select-tags "HTML"))
>       ((equal backend 'latex)
>        (plist-put plist :exclude-tags "NOLATEX")
>        (plist-put plist :select-tags "LATEX")))
>     plist)
>
>     (add-to-list 'org-export-filter-options-functions
>     'my-org-export-change-options)
>
> to my init.el file doesn't work : headers with NOHTML tag are exported
> to html, using the export dispatcher (C-c C-e h H)

Shouldn't the values should be a list of strings rather than a single
string?  (Is this something that used to work for you?)

Also, I think you should use plist-put's return value rather than
relying on the input being modified.

-- 
Kyle