custom shell prompt showing ruby version and git branch

.bash_profile

# BEGIN custom prompt
show_git_branch() {
  _branch="$(git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/')"
  test -n "$_branch" && echo -e " $_branch"
}

# prompt with ruby version
show_ruby_version()
{
  echo "$(ruby -e 'print RUBY_VERSION')"
}

show_dev_info() {
  echo "($(show_ruby_version)$(show_git_branch))"
}

# colors
Black='\e[0;30m'
Red='\e[0;31m'
LightRed='\e[1;31m'
Green='\e[0;32m'
LightGreen='\e[1;32m'
Yellow='\e[0;33m'
Blue='\e[0;34m'
Purple='\e[0;35m'
Cyan='\e[0;36m'
White='\e[0;37m'

PS1="\n\[$Yellow\]\u@\h \[$Cyan\]\w \[$Green\]\$(show_dev_info)\n\[$White\]➔\[$White\] "
# END custom prompt