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Re: [Orgmode] Re: [PATCH] Compiling multiple times the LaTeX output

From: Carsten Dominik
Subject: Re: [Orgmode] Re: [PATCH] Compiling multiple times the LaTeX output
Date: Tue, 5 Oct 2010 16:17:35 +0200

On Oct 5, 2010, at 2:46 PM, Sébastien Vauban wrote:

Hi Carsten,

Carsten Dominik wrote:
Thanks for the patch! I would certainly have a better way to process these

I would certainly *like very much to have your* better way to process it.

Sorry about that confusing sentence...

Could you make your latest sentence more explicit?

1. Can we run bibtex only if we have an indication that it might be needed? Maybe by looking at the output of the first LaTeX run? Hmm, maybe this
  would not work if only the bibtex database file was changed.

I guess things in that direction are entirely possible. I don't use bibtex
yet, but will have a look at a better integration.

2. The contrill structures you are using, are they standard shell or is bash
  needed for this?

Good question! Yes, I implicitly wrote in bash. That won't work for sure in

But, then, how do we do for writing such shells in Emacs? Go to Emacs's builtin shell? I have no experience with it, but I can have a look, except:
how would we be sure that the preferred shell of the user is that one?

I think the safe way would be to capture output of the run to an Emacs buffer and study it there. this is what AUCTeX is doing, I think.

Anyway, I think your new way is already better than the old one.


- Carsten

3. Maybe we can extract a useful error message if the last PDFLaTeX run
  still contains problems? Maybe even load the log file in this case?

For sure, such behaviors would be a great, in case of failures.

Best regards,

Here is my (much) better proposition:

--8<---------------cut here---------------start------------->8---
diff --git a/lisp/org-latex.el b/lisp/org-latex.el
index 9a62457..0a2c5fe 100644
--- a/lisp/org-latex.el
+++ b/lisp/org-latex.el
@@ -455,25 +455,35 @@ allowed. The default we use here encompasses both."
 :group 'org-export-latex
 :group 'org-export)

+(defcustom org-latex-pdf-max-runs 3
+  "Maximum number of times PDFLaTeX is run after BibTeX."
+  :group 'org-export-pdf
+  :type 'int)
(defcustom org-latex-to-pdf-process
-  '("pdflatex -interaction nonstopmode -output-directory %o %f"
-    "pdflatex -interaction nonstopmode -output-directory %o %f")
+  `("pdflatex -interaction nonstopmode -output-directory %o %f"
+    "bibtex %b"
+    ,(concat "let COUNTER=0; while (grep -e \"Rerun .* cross-
references\" %b.log > /dev/null); do if [ $COUNTER -eq "
+             (int-to-string org-latex-pdf-max-runs)
+             " ]; then break; fi; pdflatex -interaction nonstopmode
-output-directory %o %f; let COUNTER=COUNTER+1; done"))
 "Commands to process a LaTeX file to a PDF file.
This is a list of strings, each of them will be given to the shell
as a command. %f in the command will be replaced by the full file name, %b by the file base name (i.e. without extension) and %o by the base directory
of the file.
The reason why this is a list is that it usually takes several runs of -pdflatex, maybe mixed with a call to bibtex. Org does not have a clever -mechanism to detect which of these commands have to be run to get to a
-result, and it also does not do any error checking.
+pdflatex, mixed with a call to bibtex.  Org does now have a clever
+to detect how many times the document has to be compiled to get to a stable +result for the cross-references. Moreover, the number of compilations
+bibtex is limited to 3 by default (see `org-latex-pdf-max-runs' for more).
+Though, it does not do any error checking.

Alternatively, this may be a Lisp function that does the processing, so you could use this to apply the machinery of AUCTeX or the Emacs LaTeX mode.
This function should accept the file name as its single argument."
 :group 'org-export-pdf
 :type '(choice (repeat :tag "Shell command sequence"
-                 (string :tag "Shell command"))
+                        (string :tag "Shell command"))

(defcustom org-export-pdf-logfiles
--8<---------------cut here---------------end--------------->8---


- variable to limit the number of PDFLaTeX runs (3, by default)

Though, the way it is evaluated, you need to set it before calling
(before defining org-latex-to-pdf-process). Not a problem, IMHO. Maybe
are better ways, though?

- real standard sequence to compile the doc:

+ one call to PDFLaTeX
+ one call to BibTeX
+ as many calls as needed to PDFLaTeX (max 3)

Sébastien Vauban

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- Carsten

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