gti.rb

gti.rb

def move_to_top
  print "\e[7A"
end

def line_at start_x, s
  print " " * start_x if start_x > 0
  puts s[[-start_x, 0].max, TERM_WIDTH - start_x]
end


def draw_car x
  move_to_top
  line_at x, "   ,---------------."
  line_at x, "  /  /``````|``````\\\\"
  line_at x, " /  /_______|_______\\\\________"
  line_at x, "|]      GTI |'       |        |]"
  if x % 2 == 1
  line_at x, "=  .-:-.    |________|  .-:-.  ="
  line_at x, " `  -+-  --------------  -+-  '"
  line_at x, "   '-:-'                '-:-'  "
  else
  line_at x, "=  .:-:.    |________|  .:-:.  ="
  line_at x, " `   X   --------------   X   '"
  line_at x, "   ':-:'                ':-:'  "
  end
end

def clear_car x
  move_to_top
  7.times do
    line_at x, "  "
  end
end

TERM_WIDTH = (ENV["COLUMNS"] || 80).to_i - 1
puts "\n" * 7
-20.step(TERM_WIDTH - 1) do |i|
  draw_car i
  sleep 0.02
  clear_car i
end

exec "git", *ARGV

speed up: https://gist.github.com/3374932/e92f7d187ba242d982c60c74b9b5721110842d0d