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{ config, lib, ... }:
{
options = {
result = lib.mkOption { };
weird = lib.mkOption {
type = lib.types.submoduleWith {
# I generally recommend against overriding lib, because that leads to
# slightly incompatible dialects of the module system.
# Nonetheless, it's worth guarding the property that the module system
# evaluates with a completely custom lib, as a matter of separation of
# concerns.
specialArgs.lib = { };
modules = [ ];
};
};
};
config.weird =
args@{
... # note the lack of a `lib` argument
}:
assert args.lib == { };
assert args.specialArgs == { lib = { }; };
{
options.foo = lib.mkOption { };
config.foo = lib.mkIf true "alright";
};
config.result =
assert config.weird.foo == "alright";
"ok";
}
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