On 17.9.2013, at 15:24, Rasmus <ras...@gmx.us> wrote:
> Hi Carsten,
>
> Carsten Dominik <carsten.domi...@gmail.com> writes:
>
>> I'd be interested to see a patch to this effect.
>
> For now here's the filter I use and a add-to-list that hopefully
> works. It could be turned into a general function such that
>
> - Certain packages are only required with certain flavors of TeX
> (curtsy of iftex).
> - It only applies to the preamble (e.g. I don't want it in my
> code-blocks).
>
> For me it works great because I can quickly check drafts with pdftex
> (which is substantially faster on my system) and switch to xelatex or
> lualatex for more serious drafts.
>
> (setq rasmus/org-protected-packages '(inputenc fontenc))
> (add-to-list 'org-latex-default-packages-alist '("" "iftex" nil))
>
> (defun rasmus/org-latex-filter-protect-inputenc (text backend info)
> "Make inputenc and fontenc only load when using pdflatex"
> (when (org-export-derived-backend-p backend 'latex 'beamer)
> (replace-regexp-in-string
> (format "\\(\\\\usepackage\\[.*\\]{\\(%s\\)}\\)"
> (mapconcat 'symbol-name pank/org-protected-packages "\\|"))
> "\\\\ifPDFTeX\\1\\\\else\\\\fi"
> text)))
>
> (add-to-list 'org-export-filter-final-output-functions
> 'rasmus/org-latex-filter-protect-inputenc)
>
>
> The output tex file looks something like this:
>
> \ifPDFTeX\usepackage[utf8]{inputenc}\else\fi
> \ifPDFTeX\usepackage[T1]{fontenc}\else\fiHi Rasmus, this looks excellent. I think we will implement this as the default behavior, but only after 8.2. Does this capture all the possible cases, or are there more cases to consider? - Carsten > > BTW: I think the \else is redundant. > > –Rasmus > > -- > There are known knowns; there are things we know that we know.
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