Re: How to add a `\usepackage` in a Lua filter meant to support LaTeX?

[John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org>]

Norman Ramsey <fellswalker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:

> I've got a Lua filter that is meant to render certain document elements in 
> a `boxedminipage` environment.  To accomplish this feat, I give the element 
> in a suitable `div`, and a Lua filter inserts the LaTeX environment.  The 
> document itself remains universal, but the Lua filter is resolutely 
> intended for LaTeX.
>
> The filter adds a raw `\usepackage{boxedminipage2e}` to the 
> `header-includes` of the metadata, but unfortunately when `-V 
> header-includes=...` appears on the command line, it takes precedence and 
> the document metadata is ignored.  
>
> I thought of trying to use `-M header-includes=...` instead of `-V 
> header-includes=...`, but that comes with its own problems: using the `-M` 
> option, the argument on the command line is escaped.  It is not clear to me 
> if there is a mechanism I can use to put raw LaTeX in that spot.

Why couldn't the filter add to the metadata `header-includes`
RawBlock (Format "latex") "\\usepackage{boxedminipage2e}"
?

Wouldn't that be a solution?