According to Agustin's suggestion, the first PR is just to output the test cases according to patch files.
Here is a sample usage: $ export LAYOUT=/tmp/kpet-db/layout/layout.json $ bin/kpet run generate -t ark -k /tmp/foo.tar.gz -l $LAYOUT --output-testcase /tmp/foo.patch /tmp/bar.patch default/ltplite,fs/ext4,fs/xfs