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# This shows how to use Asymptote (http://asymptote.sourceforge.net/,
# or http://www.ctan.org/pkg/asymptote/)
# with latexmk. Asymptote is a vector graphics language with a
# processing program that generates graphics files that can be used in
# a LaTex file.
#
# A standard method of using it is with the asymptote LaTeX style file
# (http://mirror.ctan.org/graphics/asymptote/doc/asymptote.sty)
# The graphics drawing code is in the tex file, and applying pdflatex to
# the tex file produces one or more files with a base name the same as
# or related to the main tex file, but with the extension 'asy'. The
# .asy is processed by the program asy (part of the asymptote
# software) to produce graphics files (which may be eps, tex, or pdf
# files) that are used the next time pdflatex is run on the main tex
# file.
#
# Latexmk can be arranged to run asymptote (i.e., the program asy)
# when needed, by defining the following custom dependency. (The code
# is to be put in one of latexmk's rc files, e.g., ~/.latexmkrc.)
#
## OLD simple method (taken from the documentation for V. 2.03 of
## asymptote). These definitions are simple, but they may not always
## give the desired type of output file, and they do not ensure that
## latexmk has dependency information about files imported from the
## asy file.
#OLD sub asy {return system("asy \"$_[0]\"");}
#OLD add_cus_dep("asy","eps",0,"asy");
#OLD add_cus_dep("asy","pdf",0,"asy");
#OLD add_cus_dep("asy","tex",0,"asy");
# The following definitions arrange to run asy with the correct output
# file type. They run asy in a verbose mode so that dependency
# information on imported files can be extracted. To avoid adding a
# lot of extra printout on the screen of unimportant messages, the
# output is sent to a log file. Since this includes error messages,
# which the user should see, latexmk types out error messages and the
# like. These definitions need latexmk 4.48 or later.
add_cus_dep("asy","eps",0,"asy2eps");
add_cus_dep("asy","pdf",0,"asy2pdf");
add_cus_dep("asy","tex",0,"asy2tex");
sub asy2eps { return asy2x( $_[0], 'eps' ); }
sub asy2pdf { return asy2x( $_[0], 'pdf' ); }
sub asy2tex { return asy2x( $_[0], 'tex' ); }
sub asy2x {
my $ret = system("asy -vv -f '$_[1]' '$_[0]' >& '$_[0].log'");
open( my $FH, "<", "$_[0].log" );
%imp = ();
while (<$FH>) {
if (/^(Including|Loading) .* from (.*)\s*$/) {
my $import = $2;
$imp{$import} = 1;
}
elsif ( /^error/ || /^.*\.asy: \d/ ) {
warn "==Message from asy: $_";
$ret = 1;
}
elsif ( /^kpsewhich / || /^Processing / || /^Using /
|| /^Welcome / || /^Wrote /|| /^cd /|| /^gs /
) {
}
else {
warn "==Message from asy: $_";
}
}
close $FH;
# For latexmk 4.48
rdb_set_source( $rule, keys %imp );
return $ret;
}
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