You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: libyaml.rb
    path of file: ./repos/ruby.wasm/lib/ruby_wasm/build/product
    
    the code of the file until where you have to start completion: require_relative "./product"

module RubyWasm
  class LibYAMLProduct < AutoconfProduct
    attr_reader :target

    LIBYAML_VERSION = "0.2.5"

    def initialize(build_dir, target, toolchain)
      @build_dir = build_dir
      @target = target
      super(target, toolchain)
    end

    def product_build_dir
      File.join(@build_dir, target.to_s, "yaml-#{LIBYAML_VERSION}")
    end

    def destdir
      File.join
    
    def build(executor)
      return if Dir.exist?(install_root)

      executor.mkdir_p File.dirname(product_build_dir)
      executor.rm_rf product_build_dir
      executor.mkdir_p product_build_dir
      tarball_path =
        File.join(product_build_dir, "libyaml-#{LIBYAML_VERSION}.tar.gz")
      executor.system "curl",
                      "-o",
                      tarball_path,
                      "-L",
                      "https://github.com/yaml/libyaml/releases/download/#{LIBYAML_VERSION}/yaml-#{LIBYAML_VERSION}.tar.gz"
      executor.system "tar",
                      "xzf",
                      tarball_path,
                      "-C",
                      product_build_dir,
                      "--strip-components=1"

      # obtain the latest config.guess and config.sub for Emscripten and WASI triple support
      executor.system "curl",
                      "-o",
                      "#{product_build_dir}/config/config.guess",
                      "https://cdn.jsdelivr.net/gh/gcc-mirror/gcc@master/config.guess"
      executor.system "curl",
                      "-o",
                      "#{product_build_dir}/config/config.sub",
                      "https://cdn.jsdelivr.net/gh/gcc-mirror/gcc@master/config.sub"

      configure_args = self.configure_args.dup
      configure_args << "CFLAGS=-fPIC" if target.pic?
      executor.system "./configure", *configure_args, chdir: product_build_dir
      executor.system "make",
                      "install",
                      "DESTDIR=#{destdir}",
                      chdir: product_build_dir
    end