Added Nix flake

Nix flake makes it easy to make CI tests, reproduce bugs and provide NixOS users with latest -git version.

.gitignore

@@ -1,2 +1,12 @@
 /build/
 *.user
+
+# Direnv
+.direnv/
+
+# pre-commit-hooks
+.pre-commit-config.yaml
+
+# Nix
+result
+result-*

flake.lock

@@ -0,0 +1,64 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1696343447,
+        "narHash": "sha256-B2xAZKLkkeRFG5XcHHSXXcP7To9Xzr59KXeZiRf4vdQ=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "c9afaba3dfa4085dbd2ccb38dfade5141e33d9d4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1696193975,
+        "narHash": "sha256-mnQjUcYgp9Guu3RNVAB2Srr1TqKcPpRXmJf4LJk6KRY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "fdd898f8f79e8d2f99ed2ab6b3751811ef683242",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "dir": "lib",
+        "lastModified": 1696019113,
+        "narHash": "sha256-X3+DKYWJm93DRSdC5M6K5hLqzSya9BjibtBsuARoPco=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "f5892ddac112a1e9b3612c39af1b72987ee5783a",
+        "type": "github"
+      },
+      "original": {
+        "dir": "lib",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,35 @@
+{
+  description = "A graphical application for configuring displays in Wayland compositors";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs = inputs@{ self, nixpkgs, flake-parts }: flake-parts.lib.mkFlake { inherit inputs; } {
+    systems = [ "x86_64-linux" "aarch64-linux" ];
+    perSystem = { pkgs, system, ... }: {
+      packages = rec {
+        wdisplays = pkgs.stdenv.mkDerivation {
+          pname = "wdisplays";
+          version = "git";
+
+          src = pkgs.lib.cleanSource ./.;
+
+          nativeBuildInputs = with pkgs; [ meson ninja pkg-config wrapGAppsHook ];
+
+          buildInputs = with pkgs; [ gtk3 libepoxy wayland ];
+
+          meta = with pkgs.lib; {
+            description = "A graphical application for configuring displays in Wayland compositors";
+            homepage = "https://github.com/cyclopsian/wdisplays";
+            license = licenses.gpl3Plus;
+            platforms = platforms.linux;
+            mainProgram = "wdisplays";
+          };
+        };
+        default = wdisplays;
+      };
+    };
+  };
+}