latexmk ignore embedded file

Question

I have a TeX file with an embedded file from the command \embedfile{\jobname.org}. I'd like to stop latexmk from running when the embedded file changes. There is no official option for latexmk to ignore certain files, but it seems like in my specific use case it might be possible with the $hash_calc_ignore_pattern option.

I've added each of the following (one at a time) to my ~/.latexmkrc:

$hash_calc_ignore_pattern{'pdf'} = '^\\embedfile{\\jobname.org}';
$hash_calc_ignore_pattern{'pdf'} = 'jobname.org';
$hash_calc_ignore_pattern{'pdf'} = '.*jobname.org.*';

However, any time I change the .org file, latexmk still runs. Does anyone have any advice how to get this functionality working?

Answer 1

Here are two solutions, depending on your needs.

Setting the value of $hash_calc_ignore_pattern{'pdf'} is not what you want, because that instructs latexmk to ignore certain lines in .pdf files. Instead you can instruct latexmk to ignore all lines in .org files by

$hash_calc_ignore_pattern{'org'} = '^';

That will apply to all files with extension .org, not just to \jobname.org.

An alternative is to arrange that on each run of pdflatex the symptoms of the use of the embedded file are removed from the .fls file generated by pdflatex. The following in a latexmkrc file worked for me:

$pdflatex = "pdflatex %O %S && ".
"perl -i -p -e \"s[^INPUT (\./|)\"%R\"\\.org\\s*\$][];\" %Y%R.fls";

(I've split the definition across two lines to make copying and pasting safe. There's some UNIX-specific magic to ensure quoting works properly on the command line that is passed to the system.)