git bash prompt, by Pieter Hintjens

git bash prompt

export PROMPT_COMMAND=__git_prompt
__git_prompt ()
{
    txtblk='\e[0;30m' # Black - Regular
    txtred='\e[0;31m' # Red
    txtgrn='\e[0;32m' # Green
    txtylw='\e[0;33m' # Yellow
    txtblu='\e[0;34m' # Blue
    txtpur='\e[0;35m' # Purple
    txtcyn='\e[0;36m' # Cyan
    txtwht='\e[0;37m' # White
    bldblk='\e[1;30m' # Black - Bold
    bldred='\e[1;31m' # Red
    bldgrn='\e[1;32m' # Green
    bldylw='\e[1;33m' # Yellow
    bldblu='\e[1;34m' # Blue
    bldpur='\e[1;35m' # Purple
    bldcyn='\e[1;36m' # Cyan
    bldwht='\e[1;37m' # White
    txtrst='\e[0m'    # Text Reset

    CURRENT_BRANCH=`git branch 2>/dev/null | grep '*' | head -n1`
    CURRENT_BRANCH=${CURRENT_BRANCH:2}
    if [ -z "$CURRENT_BRANCH" ] ; then
        gitstatus=''
    else
        STATUS_LINES=`git status`
        if [[ "$STATUS_LINES" =~ "# Changed but not updated" ]] ; then
            colour=$bldred
        elif [[ "$STATUS_LINES" =~ "# Changes to be committed" ]] ; then
            colour=$bldgrn
        elif [[ "$STATUS_LINES" =~ "# Untracked files" ]] ; then
            colour=$bldblu
        else
            colour=$bldblk
        fi
        gitstatus=" "$colour":"${CURRENT_BRANCH}$txtrst
    fi
    PS1="${debian_chroot:+($debian_chroot)}\u@\h:\w${gitstatus}$ "
}