Git branch status bash prompt

gistfile1.sh

function get_git_branch {
	git branch | awk '/^\*/ { print $2 }'
}
function get_git_dirty {
	git diff --quiet || echo '*'
}
function get_git_prompt {
	git branch &> /dev/null || return 1
	echo "[$(get_git_branch)$(get_git_dirty)] "
}
export PS1='\w $(get_git_prompt)>: '