Add flake.nix

Provide NixOS flake to for building and installing this software using the Nix package manager

flake.nix

@@ -0,0 +1,62 @@
+{
+  description = "Wastebin is a pastebin";
+
+  # Nixpkgs / NixOS version to use.
+  # inputs.nixpkgs.url = "nixpkgs/nixos-21.11";
+
+  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; });
+
+    in
+    {
+
+      # Provide some binary packages for selected system types.
+      packages = forAllSystems (system:
+        let
+          pkgs = nixpkgsFor.${system};
+        in
+        {
+          wastebin = with pkgs; rustPlatform.buildRustPackage rec {
+            pname = "wastebin";
+            version = "2.4.3";
+
+            src = ./.;
+
+            cargoHash = "sha256-/3nIvDueiU6WelTlgzNYWGhToDUtf3BfUCbWkJhWAaw=";
+
+            nativeBuildInputs = [ pkg-config ];
+
+            buildInputs = [ sqlite zstd ];
+
+            env.ZSTD_SYS_USE_PKG_CONFIG = true;
+
+            meta = with lib; {
+              description = "Wastebin is a pastebin";
+              homepage = "https://github.com/matze/wastebin";
+              changelog = "https://github.com/matze/wastebin/blob/${src.rev}/CHANGELOG.md";
+              license = licenses.mit;
+              maintainers = with maintainers; [ pinpox ];
+              mainProgram = "wastebin";
+            };
+          };
+        });
+
+      defaultPackage = forAllSystems (system: self.packages.${system}.wastebin);
+    };
+}
+