message: refactor(bazel): use getattr instead of hasattr in ng_module.bzl
  getattr improves code readability and makes the code also shorter.
  PR Close
diff: @@ -129,7 +129,7 @@ def _flat_module_out_file(ctx):
  Returns:
  a basename used for the flat module out (no extension)
  """
  - if hasattr(ctx.attr, "flat_module_out_file") and ctx.attr.flat_module_out_file:
  + if getattr(ctx.attr, "flat_module_out_file", False):
  return ctx.attr.flat_module_out_file
  return "%s_public_index" % ctx.label.name
  @@ -149,7 +149,7 @@ def _should_produce_dts_bundle(ctx):
  # At the moment we cannot use this with ngtsc compiler since it emits
  # import * as ___ from local modules which is not supported
  # see: https://github.com/Microsoft/web-build-tools/issues/1029
  - return _is_view_engine_enabled(ctx) and hasattr(ctx.attr, "bundle_dts") and ctx.attr.bundle_dts
  + return _is_view_engine_enabled(ctx) and getattr(ctx.attr, "bundle_dts", False)
  def _should_produce_r3_symbols_bundle(ctx):
  """Should we produce r3_symbols bundle.
  