git branch display and coloring of path in terminal

gistfile1.txt

c_cyan=`tput setaf 6`
c_red=`tput setaf 1`
c_green=`tput setaf 2`
c_sgr0=`tput sgr0`

parse_git_branch ()
{
   if git rev-parse --git-dir >/dev/null 2>&1
   then
           gitver=$(git branch 2>/dev/null| sed -n '/^\*/s/^\* //p')
   else
           return 0
   fi
   echo -e $gitver
 }

branch_color ()
{
    if git rev-parse --git-dir >/dev/null 2>&1
    then
            color=""
            if git diff --quiet 2>/dev/null >&2
            then
                    color="${c_green}"
            else
                    color=${c_red}
            fi
    else
            return 0
    fi
    echo -ne $color
}

PS1='[\[$(branch_color)\]$(parse_git_branch)\[${c_sgr0}\]] \u@\[${c_red}\]\w\[${c_sgr0}\]: '