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