This script return history of file item on NILFS2 filesystem.
Copy script to /usr/local/bin.
USAGE: n2u log [--revision|-cp|-r cp1:cp2|{YEAR-MM-DD}:{YEAR-MM-DD}] filename.
USAGE: n2u blame [--revision|-cp|-r cp1:cp2|{YEAR-MM-DD}:{YEAR-MM-DD}] filename.
USAGE: n2u diff --revision|-cp|-r cp1:cp2 filename.
NOTE: You need root privilegies and installed nilfs2 utilities.