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https://github.com/ilyakooo0/haskell.nix.git
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a2d97bd9ad
Allows haskell.nix to be used as a nix flake. Authored-by: Alexander Bantyev <balsoft@balsoft.ru>
26 lines
931 B
Nix
26 lines
931 B
Nix
let haskellNix = rec {
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sources = {
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inherit (import ./nixpkgs/default.nix) nixpkgs-1909 nixpkgs-2003 nixpkgs-default;
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};
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config = import ./config.nix;
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overlays = [ allOverlays.combined ];
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allOverlays = import ./overlays;
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nixpkgsArgs = { inherit config overlays; };
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};
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haskellNixV1 = haskellNix.nixpkgsArgs;
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haskellNixV2 = haskellNix;
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v1DeprecationMessage = "Version 1 is deprecated: use version 2 (nixpkgs arguments are available as the `nixpkgsArgs` attribute of version 2)";
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# If no arguments, then you get V1
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# I'd like to make importing directly issue a warning, but I couldn't figure out a way to make it happen
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in haskellNixV1 // {
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__functor = _: { version ? 2 }:
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if version == 1
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then builtins.trace v1DeprecationMessage haskellNixV1
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else if version == 2
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then haskellNixV2
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else builtins.throw ("haskell.nix: unknown version: " + (builtins.toString version));
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}
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