abstreet/editor/compare_screencaps.sh

#!/bin/bash

before=$1;
after=$2;

rm -rf diff
mkdir diff

for file in `ls $before | grep -v full.png | grep -v combine.sh`; do
	# For whatever reason, the intersection annotation doesn't seem to
	# always match up between two captures.
	prefix=`echo $file | sed 's/_.*//' | sed 's/.png//'`;

	diff $before/${prefix}* $after/${prefix}*;
	if [ $? -eq 1 ]; then
		compare $before/${prefix}* $after/${prefix}* diff/${prefix}.png;
		if [ "$3" == "-i" ]; then
			feh diff/${prefix}.png $before/${prefix}* $after/${prefix}*;
			# Handle interrupts by killing the script entirely
			if [ $? -ne 0 ]; then
				exit;
			fi
		fi
	fi
done