Add flake configuration

.gitignore

@@ -56,3 +56,7 @@ imgui.ini
 compile_commands.json
 include/xdg-output-unstable-v1-client-protocol.h
 src/xdg-output-unstable-v1-protocol.c
+
+# Nix Flakes
+result
+result-*

flake.nix

@@ -5,26 +5,91 @@
     nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
   };
 
-  outputs = { self, nixpkgs }: {
-    packages.x86_64-linux.oshot =
-      with import nixpkgs { system = "x86_64-linux"; };
-      stdenv.mkDerivation {
-        name = "oshot";
-        src = self;
-        nativeBuildInputs = [ cmake gnumake pkg-config git ];
-        buildInputs = [ glfw3 leptonica libx11.dev tesseract zbar.dev libappindicator-gtk3.dev dbus.dev systemd.dev libsysprof-capture pcre2.dev libxdmcp.dev libuuid.dev libselinux.dev libsepol.dev libthai.dev libdatrie.dev libdeflate lerc.dev xz.dev zstd.dev libwebp libxkbcommon.dev libepoxy.dev libxtst giflib ];
-        configurePhase = ''
-          cmake -DCMAKE_BUILD_PREFIX=/usr -DDEBUG=0 -G "Unix Makefiles" -B build -S .
-        '';
-        buildPhase = ''
-          cmake --build build -j$(nproc)
+  outputs = { self, nixpkgs }:
+  let
+    supportedSystems = [ "x86_64-linux" ];
+    forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; });
+  in
+  {
+    packages = forAllSystems (system:
+    let
+      pkgs = nixpkgsFor.${system};
+    in
+    {
+      oshot = pkgs.stdenv.mkDerivation {
+        pname = "oshot";
+        version = "0.5.0-rc1";
+
+        src = ./.;
+
+        nativeBuildInputs = with pkgs; [
+          cmake
+          gnumake
+          pkg-config
+          git
+          wrapGAppsHook3
+          wayland-scanner
+        ];
+
+        buildInputs = with pkgs; [
+          glfw3
+          leptonica
+          tesseract
+          zbar
+          gtk3
+          libappindicator-gtk3
+          dbus
+          systemd
+          libX11
+          libXtst
+          giflib
+          libwebp
+          libsysprof-capture
+          libXdmcp
+          zenity
+          pcre2
+        ];
+
+        preConfigure = ''
+          export SOURCE_DATE_EPOCH=1
+          export GIT_AUTHOR_DATE="1970-01-01T00:00:01Z"
+          export GIT_COMMENTOR_DATE="1970-01-01T00:00:01Z"
+
+          git init -b nix-build
+          git config user.name "Nix"
+          git config user.email "nix@localhost"
+          git add .
+          git commit -m "dummy commit for build"
+          git tag -a v0.1.0 -m "v0.1.0"
         '';
+
         installPhase = ''
-          install -Dm755 build/oshot $out/bin/oshot
-          install -Dm644 oshot.desktop $out/share/applications/oshot.desktop
-          install -Dm644 LICENSE $out/share/licenses/oshot/LICENSE
+          runHook preInstall
+
+          install -Dm755 oshot $out/bin/oshot
+          if [ -f oshot.desktop ]; then
+            install -Dm644 oshot.desktop $out/share/applications/oshot.desktop
+          fi
+          if [ -f LICENSE ]; then
+            install -Dm644 LICENSE $out/share/licenses/oshot/LICENSE
+          fi
+
+          runHook postInstall
         '';
       };
-    packages.x86_64-linux.default = self.packages.x86_64-linux.oshot;
+
+      default = self.packages.${system}.oshot;
+    });
+
+    nixosModules.default = { config, lib, pkgs, ... }: {
+      options.programs.oshot.enable = lib.mkEnableOption "oshot text extraction and screenshot tool";
+
+      config = lib.mkIf config.programs.oshot.enable {
+        environment.systemPackages = [
+          self.packages.${pkgs.system}.oshot
+        ];
+      };
+    };
   };
 }