def candle_command(is_bundle: false)
      if is_bundle
        <<-EOH.split.join(" ").squeeze(" ").strip
        candle.exe
          -nologo
          #{wix_candle_flags}
          -ext WixBalExtension
          #{wix_extension_switches(wix_candle_extensions)}
          -dOmnibusCacheDir="#{windows_safe_path(File.expand_path(Config.cache_dir))}"
          "#{windows_safe_path(staging_dir, 'bundle.wxs')}"
        EOH
      else
        <<-EOH.split.join(" ").squeeze(" ").strip
          candle.exe
            -nologo
            #{wix_candle_flags}
            #{wix_extension_switches(wix_candle_extensions)}
            -dProjectSourceDir="#{windows_safe_path(project.install_dir)}" "project-files.wxs"
            "#{windows_safe_path(staging_dir, 'source.wxs')}"
        EOH
      end
    end
def candle_command(is_bundle: false)
      if is_bundle
        <<-EOH.split.join(" ").squeeze(" ").strip
        candle.exe
          -nologo
          #{wix_candle_flags}
          -ext WixBalExtension
          #{wix_extension_switches(wix_candle_extensions)}
          -dOmnibusCacheDir="#{windows_safe_path(File.expand_path(Config.cache_dir))}"
          "#{windows_safe_path(staging_dir, 'bundle.wxs')}"
        EOH
      else
        <<-EOH.split.join(" ").squeeze(" ").strip
          candle.exe
            -nologo
            #{wix_candle_flags}
            #{wix_extension_switches(wix_candle_extensions)}
            -dProjectSourceDir="#{windows_safe_path(project.install_dir)}" "project-files.wxs"
            "#{windows_safe_path(staging_dir, 'source.wxs')}"
        EOH
      end
    end
Get the shell command to complie the project WIX files

 @return [String]