A spike showing compiling IR binaries for all gems

spike.rb

# frozen_string_literal: true

require 'fileutils'
require 'find'
require 'zlib'

binaries_dir = File.join Gem.dir, 'binaries'
gems_dir = File.join Gem.dir, 'gems'

Dir['*/', base: gems_dir].each do |gem|
  gem_dir = File.join gems_dir, gem
  gem_binary_dir = File.join binaries_dir, gem

  FileUtils.mkdir_p gem_binary_dir
  Find.find gem_dir do |path|
    # Skip dotfile directories.
    if File.directory? path
      Find.prune if File.basename(path).start_with?('.')
      next
    end

    next unless File.extname(path) == '.rb'

    begin
      binary = RubyVM::InstructionSequence.compile_file(path).to_binary
    rescue SyntaxError
      warn "Failed to compile: #{path}"
      next
    end
    relative_path = path.delete_prefix(gem_dir)
    binary_filename = "#{relative_path.chomp('.rb')}.yarb.gz"
    binary_path = File.join gem_binary_dir, binary_filename

    FileUtils.mkdir_p File.dirname binary_path
    Zlib::GzipWriter.open(binary_path) { |gz| gz.write binary }
  end
end