{ lib }: let inherit (lib.attrsets) mapAttrs; in rec { doubles = import ./doubles.nix { inherit lib; }; parse = import ./parse.nix { inherit lib; }; inspect = import ./inspect.nix { inherit lib; }; platforms = import ./platforms.nix { inherit lib; }; examples = import ./examples.nix { inherit lib; }; # Elaborate a `localSystem` or `crossSystem` so that it contains everything # necessary. # # `parsed` is inferred from args, both because there are two options with one # clearly prefered, and to prevent cycles. A simpler fixed point where the RHS # always just used `final.*` would fail on both counts. elaborate = args: let final = { # Prefer to parse `config` as it is strictly more informative. parsed = parse.mkSystemFromString (if args ? config then args.config else args.system); # Either of these can be losslessly-extracted from `parsed` iff parsing succeeds. system = parse.doubleFromSystem final.parsed; config = parse.tripleFromSystem final.parsed; # Just a guess, based on `system` platform = platforms.selectBySystem final.system; libc = /**/ if final.isDarwin then "libSystem" else if final.isMinGW then "msvcrt" else if final.isLinux then "glibc" # TODO(@Ericson2314) think more about other operating systems else "native/impure"; } // mapAttrs (n: v: v final.parsed) inspect.predicates // args; in final; }