Use custom preamble from tex file for latex export

Use custom preamble from tex file for latex export

[reza]

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Hi List

Normally when exporting to latex one can set org headers to control the 
latex class and additional packages. I have now a tex file with the 
corresponding latex class and packages I normally use for my documents. 
Is there a way to use this tex file directly in org mode, without having 
to adjust #+LATEX_CLASS and #+LATEX_HEADER? Maybe something like

#+LATEX_PREAMBLE "my-preamble.tex"

Thanks for any hints.

Cheers,
Reza

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Re: Use custom preamble from tex file for latex export

[Fraga, Eric]

Maybe (untested)

#+latex_header: \include(preamble)

(maybe with .tex in the file name but probably not needed)
-- 
: Eric S Fraga, with org release_9.6.1-250-ge6353d in Emacs 30.0.50

Re: Use custom preamble from tex file for latex export

[Fraga, Eric]

You probably want "input" and not "include" in my suggestion.
-- 
: Eric S Fraga, with org release_9.6.1-250-ge6353d in Emacs 30.0.50

Re: Use custom preamble from tex file for latex export

[Fraga, Eric]

Let me try again (I first response wrong).

The following may work:

#+latex_header: \input{preamble}


-- 
: Eric S Fraga, with org release_9.6.1-250-ge6353d in Emacs 30.0.50

Re: Use custom preamble from tex file for latex export

[reza]

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> #+latex_header: \input{preamble}

Thanks for the idea, will test this, but I fear this will collide with 
the latex class provided by org?

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Re: Use custom preamble from tex file for latex export

[Fraga, Eric]

On Friday, 17 Feb 2023 at 12:38, reza wrote:
> Thanks for the idea, will test this, but I fear this will collide with
> the latex class provided by org?

Well, you could have just the documentclass line removed from the
preamble and define an org latex class appropriately.  There's always
going to be some need to have part of the configuration within the org
file itself but it could be minimised.

The full org alternative is to customise org-latex-classes with all the
LaTeX preamble you want or need.  This is what I do.

-- 
: Eric S Fraga, with org release_9.6.1-250-ge6353d in Emacs 30.0.50

Re: Use custom preamble from tex file for latex export

[reza]

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> The full org alternative is to customise org-latex-classes with all the
> LaTeX preamble you want or need.  This is what I do.

Is there a way to extend org-latex-classes inside my org file, so I can 
keep using C-c C-e l l (export to latex)?


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Re: Use custom preamble from tex file for latex export

[Ihor Radchenko]

reza <reza@housseini.me> writes:

>> The full org alternative is to customise org-latex-classes with all the
>> LaTeX preamble you want or need.  This is what I do.
>
> Is there a way to extend org-latex-classes inside my org file, so I can 
> keep using C-c C-e l l (export to latex)?

Two possibilities:

1. Put file-local variable
2. Create an "Empty" class with empty documentclass statement
   and then #+LATEX_CLASS: Empty #+LATEX_HEADER: \input{...}


-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>

Re: Use custom preamble from tex file for latex export

[Fraga, Eric]

On Friday, 17 Feb 2023 at 13:08, reza wrote:
> Is there a way to extend org-latex-classes inside my org file, so I can
> keep using C-c C-e l l (export to latex)?

Yes, should be possible.  Check out info manual: (emacs) File Variables

-- 
: Eric S Fraga, with org release_9.6.1-250-ge6353d in Emacs 30.0.50

Re: Use custom preamble from tex file for latex export

[reza]

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> Two possibilities:
> 
> 1. Put file-local variable
> 2. Create an "Empty" class with empty documentclass statement
>     and then #+LATEX_CLASS: Empty #+LATEX_HEADER: \input{...}
> 

Sorry for my noobish questions:

1. How do I put file-local variables in my org file?
2. Is it possible to do this inside my org file?

Thanks and cheers!


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Re: Use custom preamble from tex file for latex export

[Ihor Radchenko]

reza <reza@housseini.me> writes:

>> Two possibilities:
>> 
>> 1. Put file-local variable
>> 2. Create an "Empty" class with empty documentclass statement
>>     and then #+LATEX_CLASS: Empty #+LATEX_HEADER: \input{...}
>> 
>
> Sorry for my noobish questions:
>
> 1. How do I put file-local variables in my org file?

M-x add-file-local-variable
or
M-x add-file-local-varable-prop-line

The latter will put things at the bottom. The format - at the top of the
file.

You can also use #+BIND: keyword if you have
`org-export-allow-bind-keywords' set to t.

> 2. Is it possible to do this inside my org file?

For self-contained file, you must set file-local variable anyway.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>

Re: Use custom preamble from tex file for latex export

[reza]

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> Yes, should be possible.  Check out info manual: (emacs) File Variables

I did manage to patch together a working example, but when I tried to 
move into an setupfile it doesn't work anymore. Is this intended or did 
I do something wrong?

template.org

# -*- org-export-allow-bind-keywords: t; -*-
#+BIND: org-latex-classes (my-latex-classes)
#+BIND: org-latex-hyperref-template nil
#+LATEX_CLASS: from-file
#+BEGIN_SRC emacs-lisp :exports results :results none
   (defun my-latex-classes
     '(("from-file"
        "\\RequirePackage{preamble}\n[NO-DEFAULT-PACKAGES]"
        ("\\section{%s}" . "\\section*{%s}")
        ("\\subsection{%s}" . "\\subsection*{%s}")
        ("\\subsubsection{%s}" . "\\subsubsection*{%s}")
        ("\\paragraph{%s}" . "\\paragraph*{%s}")
        ("\\subparagraph{%s}" . "\\subparagraph*{%s}"))))
#+END_SRC

report.org

# -*- org-export-allow-bind-keywords: t; -*-
#+title: A dummy report
#+subtitle: This is a dummy report
#+setupfile: ../template.org

* Title

asdasd

This gives me an error, unknown latex class "from-file" and checking the 
variable "org-latex-classes" with C-h v looks like it was not set.

Thanks for any help.

Cheers,
Reza

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Re: Use custom preamble from tex file for latex export

[Fraga, Eric]

I'm travelling so will keep this short.

A few things potentially wrong with your setup:

1. the elisp src block won't be executed automatically.

2. I do not know if the BIND statements are interpreted when included
   but I imagine they are.
   
Sometimes it's better to use the base Emacs features (e.g. file local
variables) than try to shoehorn everything into org.

-- 
: Eric S Fraga, with org release_9.6.1-224-g8ae8a8 in Emacs 30.0.50