bash_prompt.sh

function bash_prompt {

    # color
    GREEN='\[\e[0;32m\]'
    BLUE='\[\e[0;34m\]'
    RESET='\[\e[0m\]'

    # working dir
    PROMPT="\W"

    # git
    if type "__git_ps1" > /dev/null 2>&1; then
        PROMPT="$PROMPT$(__git_ps1 "${GREEN}(%s)${RESET}")"
    fi

    # virtualenv
    if [[ $VIRTUAL_ENV != "" ]]; then
        PROMPT="$PROMPT${BLUE}{${VIRTUAL_ENV##*/}}${RESET}"
    fi

    PS1="$PROMPT\$ "
}
export -f bash_prompt

# Bash shell executes this function just before displaying the PS1 variable
export PROMPT_COMMAND='bash_prompt'