move-tfvars.rb

#!/usr/bin/env ruby

require "fileutils"

class Mover
  def initialize
    @expr = "app/stacks/*/tfvars"
  end

  def run
    if empty?
      puts "No existing tfvars require moving in #{@expr}. Exiting."
      exit 0
    end

    puts <<~EOL
      Will move tfvars to new recommended location.
      Will move app/stacks/*/tfvars to config/stacks/*/.tfvars
      Any existing config/stacks/*/tfvars folders will be removed and replaced.
      It's recommended that you commit and save your code before running this script.

    EOL
    move_all(preview: true)
    sure?
    move_all(preview: false)
  end

  def empty?
    Dir.glob(@expr).empty?
  end

  def sure?
    print "\nAre you sure you want to move all tfvars files? [y/N] "
    answer = gets.chomp
    puts
    unless answer =~ /^y/i
      puts "Exiting. Did not move files."
      exit 1
    end
  end

  def move_all(preview:)
    Dir.glob(@expr).each do |path|
      move path, preview: preview
    end
  end

  def move(src, preview:)
    dest = src.sub("app/stacks", "config/stacks")
    header_message(preview)
    puts "    #{src} => #{dest}"
    unless preview
      FileUtils.rm_rf(dest)
      FileUtils.mkdir_p(File.dirname(dest))
      FileUtils.mv(src, dest)
    end
  end

  @@preview_shown = false
  @@moving_shown = false
  def header_message(preview)
    if preview
      unless @@preview_shown
        puts "Previewing move of tfvars files:\n\n"
        @@preview_shown = true
      end
    else
      unless @@moving_shown
        puts "Moving tfvars files:\n\n"
        @@moving_shown = true
      end
    end
  end

end

if __FILE__ == $0
  Mover.new.run
end