From d1b18f39ddcda4d63016efd622ef959952aae072 Mon Sep 17 00:00:00 2001
From: Nunuhara Cabbage <nunuhara@haniwa.technology>
Date: Thu, 9 Mar 2023 19:37:42 -0800
Subject: [PATCH] Add flake.nix

---
 flake.lock | 26 ++++++++++++++++++++
 flake.nix  | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..2930702
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,26 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1678137616,
+        "narHash": "sha256-T+lWTRdcYaOnZQW+Ehdlg+YldC2l9cq2GXJFPq22Nxc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "7edcdf7b169c33cd3eef9aba50521ce93ee666b8",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-22.11",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..0c65716
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,71 @@
+{
+  description = "Open source implementation of AliceSoft's System 4 game engine for unix-like operating systems";
+
+  # Nixpkgs / NixOS version to use.
+  inputs.nixpkgs.url = "nixpkgs/nixos-22.11";
+
+  outputs = { self, nixpkgs }:
+    let
+
+      # 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; });
+
+    in {
+
+      # Set up xsystem4 development environment:
+      #     nix develop # create shell environment with dependencies available
+      devShell = forAllSystems (system:
+        let pkgs = nixpkgsFor.${system}; in with pkgs; pkgs.mkShell {
+          nativeBuildInputs = [ meson ninja pkg-config ];
+          buildInputs = [
+            cglm
+            SDL2
+            freetype
+            libffi
+            libjpeg
+            libwebp
+            libsndfile
+            glew
+            readline
+            flex
+            bison
+          ];
+        }
+      );
+
+      # Build xsystem4:
+      #     nix build .?submodules=1 # build xsystem4 (outputs to ./result/)
+      #     nix shell .?submodules=1 # create shell environment with xsystem4 available
+      # Install xsystem4 to user profile:
+      #     nix profile install .?submodules=1
+      packages = forAllSystems (system:
+        let pkgs = nixpkgsFor.${system}; in {
+          default = with pkgs; stdenv.mkDerivation rec {
+            name = "xsystem4";
+            src = ./.;
+            mesonAutoFeatures = "auto";
+            nativeBuildInputs = [ meson ninja pkg-config ];
+            buildInputs = [
+              cglm
+              SDL2
+              freetype
+              libffi
+              libjpeg
+              libwebp
+              libsndfile
+              glew
+              readline
+              flex
+              bison
+            ];
+          };
+        }
+      );
+    };
+}