Check for the current version of Rails

rails_version.sh

function rails_version {
  if (( $# == 1 )); then  
    VERSION="$1-stable"
  else
    VERSION='master'
    echo -e "\033[1;33mUsage: rails_version [BRANCH]\033[0m"
    echo -e "\033[1;33mExample: rails_version 4-1\033[0m"
  fi 
  URL="https://raw.githubusercontent.com/rails/rails/$VERSION/RAILS_VERSION"  
  VERSION_NUMBER=$(curl -s $URL)
  echo -e "Current Rails version for $VERSION: \033[0;31m$VERSION_NUMBER\033[0m"
}