#!/bin/bash


# TODO: there should be some way to use -recorder to get list of dependencies
# somehow, though I'd hate to regenerate the whole PDF just to make dependencies
# note that the snapshot package is even better

# NOTE: next thing to try is the create temporary document with
# \RequirePackage{snapshot} appended to the top, then run xelatex normally and
# process the output *.dep (or *.log) file to extract the necessary
# requirements. It may be possible to use additional xelatex flags to reduce
# unnecessary work

echo 'ninja_dyndep_version = 1'

src="$1"
dst="$2"
tgt="${dst%%.*}.pdf"
aux="${dst%%.*}.aux"
log="${dst%%.*}.log"

# get_tex command
# returns the argument of \command{...} in the src document
get_tex() {
    grep "[\]$1" "$src" | sed 's/.*{\(.*\)}.*/\1/'
}

deps=( )

if grep -q '\\documentclass{iditacard}' "$src"; then
    deps+=(
        # The class file
        'iditacard.cls'

        # The artwork
        "images/card/$(get_tex art).png"

        # The deckmark
        "images/deck/$(get_tex deck).png"
    )
fi

read -r -a rawimages <<<"$(grep -o '\\includegraphics[^}]*}' "$src" | sed 's/.*{\(.*\)}.*/images\/\1/')"
deps+=( "${rawimages[@]}" )

if [ "${#deps[@]}" -gt 0 ]; then
    echo "build $tgt | $aux $log : dyndep | ${deps[*]}"
else
    echo "build $tgt | $aux $log : dyndep"
fi