28 lines
1.1 KiB
Nix
28 lines
1.1 KiB
Nix
let inherit (import ../attrsets.nix) mapAttrs; in
|
|
|
|
rec {
|
|
doubles = import ./doubles.nix;
|
|
parse = import ./parse.nix;
|
|
inspect = import ./inspect.nix;
|
|
platforms = import ./platforms.nix;
|
|
|
|
# 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;
|
|
} // mapAttrs (n: v: v final.parsed) inspect.predicates
|
|
// args;
|
|
in final;
|
|
}
|