Find.find

# File tmp/rubies/ruby-3.2.0/lib/find.rb, line 38
def find(*paths, ignore_error: true) # :yield: path
  block_given? or return enum_for(__method__, *paths, ignore_error: ignore_error)

  fs_encoding = Encoding.find("filesystem")

  paths.collect!{|d| raise Errno::ENOENT, d unless File.exist?(d); d.dup}.each do |path|
    path = path.to_path if path.respond_to? :to_path
    enc = path.encoding == Encoding::US_ASCII ? fs_encoding : path.encoding
    ps = [path]
    while file = ps.shift
      catch(:prune) do
        yield file.dup
        begin
          s = File.lstat(file)
        rescue Errno::ENOENT, Errno::EACCES, Errno::ENOTDIR, Errno::ELOOP, Errno::ENAMETOOLONG, Errno::EINVAL
          raise unless ignore_error
          next
        end
        if s.directory? then
          begin
            fs = Dir.children(file, encoding: enc)
          rescue Errno::ENOENT, Errno::EACCES, Errno::ENOTDIR, Errno::ELOOP, Errno::ENAMETOOLONG, Errno::EINVAL
            raise unless ignore_error
            next
          end
          fs.sort!
          fs.reverse_each {|f|
            f = File.join(file, f)
            ps.unshift f
          }
        end
      end
    end
  end
  nil
end