bisect: rebuild all and do tests/bisect.expect

diff --git a/bisect.sh b/bisect.sh
new file mode 100755 (executable)
index 0000000..d93c6a9
--- /dev/null
+++ b/bisect.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# an exit code of 125 asks "git bisect"
+# to "skip" the current commit
+(cd .. && make clean) || exit 125
+(cd .. && make distclean) || exit 125
+(cd .. && make) || exit 125
+
+# run the application and check that it produces good output
+(cd .. && tests/bisect.expect)