bash smile prompt

smile.bash

## Prompt
# Colors used for the prompt
# Regular text color
BLACK='\[\e[0;30m\]'
# Bold text color
BBLACK='\[\e[1;30m\]'
# Background color
BGBLACK='\[\e[40m\]'
RED='\[\e[0;31m\]'
BRED='\[\e[1;31m\]'
BGRED='\[\e[41m\]'
GREEN='\[\e[0;32m\]'
BGREEN='\[\e[1;32m\]'
BGGREEN='\[\e[1;32m\]'
YELLOW='\[\e[0;33m\]'
BYELLOW='\[\e[1;33m\]'
BGYELLOW='\[\e[1;33m\]'
BLUE='\[\e[0;34m\]'
BBLUE='\[\e[1;34m\]'
BGBLUE='\[\e[1;34m\]'
MAGENTA='\[\e[0;35m\]'
BMAGENTA='\[\e[1;35m\]'
BGMAGENTA='\[\e[1;35m\]'
CYAN='\[\e[0;36m\]'
BCYAN='\[\e[1;36m\]'
BGCYAN='\[\e[1;36m\]'
WHITE='\[\e[0;37m\]'
BWHITE='\[\e[1;37m\]'
BGWHITE='\[\e[1;37m\]'

PROMPT_COMMAND=smile_prompt

function smile_prompt
{
	if [ "$?" -eq "0" ]; then
        #smiley
        SC="${GREEN}:)"
    else
        #frowney
        SC="${RED}:("
    fi

    if test -z "$VIRTUAL_ENV" ; then
        PYTHON_VIRTUALENV=""
    else
        PYTHON_VIRTUALENV="[`basename \"$VIRTUAL_ENV\"`] "
    fi

    GIT_BRANCH=$(git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')
    if ! test -z "$GIT_BRANCH" ; then
        GIT_BRANCH=":$GIT_BRANCH"
    fi

    if [ $UID -eq 0 ]; then
        #root user color
        UC="${RED}"
    else
        #normal user color
        UC="${BGREEN}"
    fi
        
    #environment colo
    EC="${BCYAN}"
    #hostname color
    HC="${BGREEN}"
    #regular color
    RC="${BBLUE}"
    #default color
    DF='\[\e[0m\]'
    
    PROMPT_DIRTRIM=3
    PS1="${DF}[${UC}\u${RC}@${HC}\h ${RC}\w${BYELLOW}${GIT_BRANCH}${DF}] ${SC}${DF} ${EC}${PYTHON_VIRTUALENV}${DF}"

    echo -ne "\033]0;$(basename `pwd`)$GIT_BRANCH\a"
}