#!/bin/sh

set -e

test ! -d .git # simple safety check
git init

[ -f mkdiff.sh ] || cp "$0" mkdiff.sh
chmod +x mkdiff.sh
git add mkdiff.sh; git commit -m "Save mkdiff.sh"

states=$(ls -1 *.pdf | xargs basename -s .pdf)
for state in $states; do
	outfile=$state.txt
	git checkout -b $state
	git add $state.pdf; git commit -m "Pristine file $state.pdf"
	pdftotext -nopgbrk $state.pdf $state.txt
	git add $state.txt; git commit -m "Extract content from $state.pdf"
	if [ -f $state.pl ]; then
		chmod +x $state.pl
		git add $state.pl; git commit -m "Save normalizing script $state.pl"
		./$state.pl $state.txt
		git commit -m "Normalize $state.pdf" $state.txt
	fi
	cp $state.txt content.txt
	git add content.txt; git commit -m "Copy $state.txt to content.txt"
	git checkout master
	git merge $state
done

echo "sources prepared and ready for inspection, e.g. with this command:"
echo "  git log -p -w --color-words --patience content.txt"