Cool bash color prompt for Git fans

gistfile1.sh

# git will show dirty branches
GIT_PS1_SHOWDIRTYSTATE=true

# Directory shortening for prompt
# Edit this based on the directory structures you like to use
function shorten_dir() {
	d=$(pwd)
	d=${d/\/Users\/sim\/dev\/spx/SPX}
	d=${d/\/Users\/sim\/dev\/rails_projects/RP}
	d=${d/\/Users\/sim\/dev\/proj/PROJ}
	d=${d/\/Users\/sim\/dev/DEV}
	d=${d/\/Users\/sim/\~}
	echo $d
}

# Magic color prompt authored by the genetic clone of a psychedelic cross between Brian Fox and Linus Torvalds
# Example: 1996[SPX/spx-web(dev *)]$
#  1996: command number in history
#  SPX: shorthand for ~/dev/spx; see shorten_dir above
#  SPX/spx-web: pwd
#  dev: current Git branch
#  *: branch is dirty
#  $: color is based on the exit code of last command: OK (green) or not (red)
export PROMPT_COMMAND='PS1="\[\033[0;33m\]\!\[\033[0;32m\][$(shorten_dir)\[\033[35m\]$(__git_ps1 "(%s)")\[\033[32m\]]\`if [[ \$? = "0" ]]; then echo "\\[\\033[32m\\]"; else echo "\\[\\033[31m\\]"; fi\`\$\[\033[0m\] ";'