Gem::Specification.load

# File tmp/rubies/ruby-3.3.0/lib/rubygems/specification.rb, line 1159
def self.load(file)
  return unless file

  spec = @load_cache_mutex.synchronize { @load_cache[file] }
  return spec if spec

  return unless File.file?(file)

  code = Gem.open_file(file, "r:UTF-8:-", &:read)

  begin
    spec = eval code, binding, file

    if Gem::Specification === spec
      spec.loaded_from = File.expand_path file.to_s
      @load_cache_mutex.synchronize do
        prev = @load_cache[file]
        if prev
          spec = prev
        else
          @load_cache[file] = spec
        end
      end
      return spec
    end

    warn "[#{file}] isn't a Gem::Specification (#{spec.class} instead)."
  rescue SignalException, SystemExit
    raise
  rescue SyntaxError, StandardError => e
    warn "Invalid gemspec in [#{file}]: #{e}"
  end

  nil
end