colorise terminal shell showing git branch

.bash_profile

parse_git_branch () {
  git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}

parse_git_tag () {
  git describe --tags 2> /dev/null
}

parse_git_branch_or_tag() {
  local OUT="$(parse_git_branch)"
  if [ "$OUT" == " ((no branch))" ]; then
    OUT="($(parse_git_tag))";
  fi
  echo $OUT
}

##export PS1="\u@\h:\w\$(parse_git_branch_or_tag) $ "
##export PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ '

function color_my_prompt {
    local __user_and_host="\[\033[01;32m\]\u@\h"
    local __cur_location="\[\033[01;34m\]\w"
    local __git_branch_color="\[\033[31m\]"
    #local __git_branch="\`ruby -e \"print (%x{git branch 2> /dev/null}.grep(/^\*/).first || '').gsub(/^\* (.+)$/, '(\1) ')\"\`"
    local __git_branch='`git branch 2> /dev/null | grep -e ^* | sed -E  s/^\\\\\*\ \(.+\)$/\(\\\\\1\)\ /`'
    local __prompt_tail="\[\033[35m\]$"
    local __last_color="\[\033[00m\]"
     export PS1="$__user_and_host $__cur_location $__git_branch_color$__git_branch$__prompt_tail$__last_color "
}
color_my_prompt

#export PS1="\n\[\e[1;37m\]|-- \[\e[1;32m\]\u\[\e[0;39m\]@\[\e[1;36m\]\h\[\e[0;39m\]:\[\e[1;33m\]\w\[\e[0;39m\]\[\e[1;35m\]$(__git_ps1 " (%s)")\[\e[0;39m\] \[\e[1;37m\]--|\[\e[0;39m\]\n$"