Host-dependent automatic prompt colorization

.bashrc

#!/bin/bash
# Put the contents of this file in your .bashrc, to
# get a prompt that is automatically a distinct,
# stable color on every host you log into.

# ^O puts terminal back into default text mode for every prompt,
# preventing random glyphs.

resetterm="\[\017\]"

# \[ and \] prevent the shell from counting these characters
# against the line length.

usercolor="\[\033[35m\]"   # purple
hostcolor="\[\033[4"$(( ( $(hostname|cksum|cut -d\  -f1|cut -d\	 -f1) / 7 ) % 7))"m\033[1;3"$(( $(hostname|cksum|cut -d\  -f1|cut -d\	 -f1) % 7))"m\]"   # bold-random-color on random-color
timecolor="\[\033[35m\]"   # purple
normcolor="\[\033[0m\]"    # prompt bg
resetcolor="\[\033[0m\]"   # terminal default

# To put in xterm titlebar, \007 ends the string but \r backs over it
# for non-parsing terminals.  It would be cool to change this to
# exclude non-parsing terminals so that my vt100 won't beep at me for
# every line.

title="\[\033]0;b:\w\007\r\]"

export PS1=$resetterm""$title""$normcolor"["$usercolor"\u"$normcolor"@"$hostcolor"\h"$normcolor":"$timecolor"\A"$normcolor" \j \w]\$"$resetcolor" "