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I want to know how to use latexmk with xelatex and tell it to write to xdv file a number of times until all the references are correct, then use xdvipdfmx once to generate the final output. This is practical because for manuscripts with a lot of figures and references and needs several passes to get all the references right, writing to xdv files are way, way faster than writing to pdf every pass.

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Could you quantify the improvement in execution time from making an xdv file instead of a pdf file. –  John Collins Apr 2 at 12:19
    
@JohnCollins For my 100+ pages thesis with a lot of eps figures, making a pdf takes about 10 minutes, while xdv finishes in a minute. –  david sedai Apr 2 at 12:51

1 Answer 1

up vote 2 down vote accepted

With the present latexmk, a simple trick is to arrange to treat this by the dvi-pdf route for making pdf files. You do this by getting the 'xdv' file copied to a 'dvi' file. The following lines in an initialization file implement this:

$pdf_mode = 3;
$postscript_mode = $dvi_mode = 0;
$latex = 'xelatex --no-pdf %O %S && cp %Z%R.xdv %D';
$dvipdf = 'xdvipdfmx %O -o %D %S';
$clean_full_ext .= ' xdv';

The definition of $latex is appropriate for UNIX-like operating systems (e.g., linux and OS-X), and will need to be changed for MS-Windows.

Given the improved performance by this method, I should enhance latexmk to do it properly, with a -pdfxdv option in addition to its current -pdfdvi option.

Notes

The tail && cp %Z%R.xdv %D of the command line defined in $latex uses an idiom of the sh/bash shells: The part to the right of the && is run only if the command on the left (i.e., xelatex) succeeded. The cp part does the copying (under UNIX-type operating systems) of the xdv file to the dvi file. %Z denotes the output directory with any necessary trailing separator, %R denotes the rootname of the 'tex' file, and %D denotes the destination file, i.e., the dvi file; these will be replaced by the correct values by latexmk, as explained in its documentation.

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Thanks! Can you elaborate on the && cp %Z%R.xdv part? –  david sedai Apr 2 at 14:32
    
@davidsedai: I've added some comments. –  John Collins Apr 2 at 16:03

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