Conditional buildrequires and mock --installdeps

[dletai]

How can I install dependencies for a package built with '--with xxx' flags?
For example, suppose in spec file I have

%bcond_with lua
%if %{with lua}
BuildRequires: pkgconfig(lua) >= 5.1.0
%endif

Outside mock I usually do rpmbuild -ba --with lua
I can solve it easily by installing the dependencies manually, but it would be nice if I could reuse the same command line parameters for both the installdeps and the actual build of the spec.
Is there an option I can pass to mock?
I have tried using --with=lua but I think it only works for building the package, not for installdeps.

Conversely, if I have bcond_without and I want to test building without unnecessary packages, how can I tell mock --installdeps to not pull bcond_without conditional packages?

[praiskup]

I have tried using --with=lua but I think it only works for building the package, not for installdeps.

Thank you for this question. You are right, --installdeps doesn't take --with/out into account. Please submit RFE, or even better - open a pull request!