Is there any built in mechanism for editing a repository's hgrc config file using the Mercurial API? I'm writing an extension that requires storing some options in the config file, and I'd like to provide a command for do so (the options that need to be stored involve timestamps and would be a little tricky for users to edit manually).
The Mercurial codebase does not provide any automated way to edit hgrc files except when they're first created by a clone operation and then only to set the paths.default setting to the origin.