The API lacks a setter function for the GKeyFileFlags of a newly created GKeyFile.

If you generate a new GKeyFile you can add values and comments just fine, but the comments won't get written out by g_key_file_to_data (), since G_KEY_FILE_KEEP_COMMENTS is not set. It cannot be set without sideeffects with the current API.

My workaround is

  kfile = g_key_file_new ();
  g_key_file_load_from_data (kfile, "\n", 1,
                             G_KEY_FILE_KEEP_COMMENTS |
                             G_KEY_FILE_KEEP_TRANSLATIONS,
                             NULL);

   [set the values and invoke _to_data()]

but this has the side effect that the newline gets written to the output file as well - it is also not possible to load 0 bytes from data to avoid that.

A g_key_file_[gs]et_flags () would not hurt.