gistfile1.txt

def find_cmd(*commands)
  dirs_on_path = ENV['PATH'].to_s.split(File::PATH_SEPARATOR)
  commands += commands.map{|cmd| "#{cmd}.exe"} if RUBY_PLATFORM =~ /win32/

  full_path_command = nil
  found = commands.detect do |cmd|
    dir = dirs_on_path.detect do |path|
      full_path_command = File.join(path, cmd)
      File.executable? full_path_command
    end
  end
  found ? full_path_command : abort("Couldn't find database client: #{commands.join(', ')}. Check your $PATH and try again.")
end