generate_qr_code.rb

require 'pry'
require 'rqrcode'

qrcode = RQRCode::QRCode.new('https://cs125.cs.illinois.edu')

png = qrcode.as_png(
  bit_depth: 1,
  border_modules: 4,
  color_mode: ChunkyPNG::COLOR_GRAYSCALE,
  color: 'black',
  file: nil,
  fill: 'white',
  module_px_size: 6,
  resize_exactly_to: false,
  resize_gte_to: false,
  size: 600
)

logo_size = 200
cs125_png = ChunkyPNG::Image.from_file('cs125.png')
cs125_png = cs125_png.resize(logo_size, logo_size)

png = png.compose(cs125_png, png.width/2 - logo_size/2, png.height/2 - logo_size/2)

# binding.pry

IO.write("/tmp/github-qrcode.png", png.to_s)

MIT License