Coloured prompt with ruby version and git branch name

gistfile1.sh

# Git branch based prompt
function parse_git_branch {
  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ \1 /'
}

# ruby version based prompt
function parse_ruby_version {
  eval "rbenv version-name"
}

function proml {
  local       GREEN="\[\033[0;32m\]"
  local  LIGHT_GRAY="\[\033[0;37m\]"
  local         RED="\[\033[0;31m\]"
  local      NO_COLOUR="\[\033[0m\]"

PS1="$RED\$(parse_ruby_version) $LIGHT_GRAY\u@\h \w$GREEN\$(parse_git_branch)$NO_COLOUR\$ "
}
proml