+# The following machinery tests the gane against a binary made from
+# the advent430 branch To use it, switch to that branch, build the
+# binary, sand run it once to generate adventure.data, then switch
+# back to master leaving advent430 and adventure.data in place (make
+# clean does not remove them).
+#
+# The diff file produced has corrected spellings in it. That's what oldfilter
+# is for, to massage out the orioginal dpellings and avoid noise diffs.
+# Diffs in amount of whitespace and trailing whitespace are ignored
+
+ancient: $(SGAMES)
+ @if [ -f ../advent430 ]; then cp ../advent430 ../adventure.data .; else echo "advent430 nonexistent"; exit 1; fi
+ @-for x in *.log; do stem=$${x%.log}; echo $${stem}; ./advent430 <$${stem}.log | ./oldfilter >$${stem}.ochk; done
+ @-(for x in *.log; do stem=$${x%.log}; legend=$$(sed -n '/^## /s///p' <$$x 2>/dev/null || echo "(no description)"); ./newfilter <$${stem}.chk | tapdiffer -w "$${legend}" $${stem}.ochk; done; echo 1..$(words $(shell ls *.log))) | tapview
+ @rm *.ochk advent430 adventure.data
+