Andrii Doroshenko (Xrayez) a3c2c1e18a SCons: Add an option to detect C++ modules recursively ...

This adds `custom_modules_recursive` which allows to detect and collect
all nested C++ modules which may reside in any directory specified by
`custom_modules` option.

The detection logic is made to be more strict because `SCSub` may be
used for organizing hierarchical builds within a module itself, so the
existence of `register_types.h` and `config.py` is checked as well
(these are all required for a C++ module to be compiled by Godot).

For performance reasons, built-in modules are not checked recursively,
and there's no benefit of doing so in the first place.

It's now possible to specify a directory path pointing to a *single*
module, as it may contain nested modules which are detected recursively.

2020-10-24 22:22:58 +03:00

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