Handy 3rd party script to color p4 diff output
Do a 'git status' if there is a .git folder between here and root, or if there is none, then try to do something similar in a Perforce world.
Do a 'git diff' if there is a .git folder between here and root, or if there is none, and P4 environment vars are set, do a p4 diff and colorize its output.