Modernize the build systemHEADmain

1 files changed, 61 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..08deb06
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,61 @@
+{
+  description = "A shitty game I wrote a long time ago";
+
+  # Nixpkgs / NixOS version to use.
+  inputs.nixpkgs.url = "nixpkgs/nixos-unstable";
+
+  outputs = { self, nixpkgs }:
+    let
+
+      # to work with older version of flakes
+      lastModifiedDate = self.lastModifiedDate or self.lastModified or "19700101";
+
+      # Generate a user-friendly version number.
+      version = builtins.substring 0 8 lastModifiedDate;
+
+      # System types to support.
+      supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ];
+
+      # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+
+      # Nixpkgs instantiated for supported system types.
+      nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; overlays = [ self.overlay ]; });
+
+    in
+
+    {
+
+      # A Nixpkgs overlay.
+      overlay = final: prev: {
+
+        yetihack = with final; stdenv.mkDerivation rec {
+          pname = "yetihack";
+          inherit version;
+
+          src = ./.;
+
+          nativeBuildInputs = [ pkg-config ];
+          buildInputs = [ ncurses ];
+
+          installPhase = ''
+            mkdir -p $out/bin
+            cp yetihack $out/bin
+          '';
+        };
+
+      };
+
+      # Provide some binary packages for selected system types.
+      packages = forAllSystems (system:
+        {
+          inherit (nixpkgsFor.${system}) yetihack;
+        });
+
+      # The default package for 'nix build'. This makes sense if the
+      # flake provides only one package or there is a clear "main"
+      # package.
+      defaultPackage = forAllSystems (system: self.packages.${system}.yetihack);
+
+    };
+}