build: Add Nix flake for building x86_64- and aarch64-linux Nix packages

.gitignore

@@ -1,3 +1,4 @@
 __pycache__
 /dist/
 /.coverage*
+/result

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1717428950,
+        "narHash": "sha256-Pr3lhu2No1GHJarhjt+Jsfxye1wNLoY12E44p0b3VO0=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "4fad892a8f64635a55423e4acfefeefb6caf4d0d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-23.11-small",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,45 @@
+{
+  description = "A simple NixOS deployment tool using nixos-rebuild internally, but trying to make infrastructure deployment more convenient.";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.11-small";
+  };
+
+  outputs = { nixpkgs, ... }:
+    let
+      version = "0.0.1";
+    in
+    {
+      packages = nixpkgs.lib.attrsets.genAttrs [ "x86_64-linux" "aarch64-linux" ] (system:
+        let
+          pkgs = nixpkgs.legacyPackages."${system}";
+        in
+        rec {
+          infra-rebuild = pkgs.python3Packages.buildPythonApplication {
+            pname = "infra-rebuild";
+            inherit version;
+            pyproject = true;
+
+            src = ./.;
+
+            nativeBuildInputs = with pkgs.python3Packages; [
+              hatchling
+            ];
+
+            propagatedBuildInputs = [
+              pkgs.python3Packages.click
+              pkgs.nixos-rebuild
+            ];
+
+            meta = with nixpkgs.lib; {
+              description = "A simple NixOS deployment tool using nixos-rebuild internally";
+              longDescription = "A simple NixOS deployment tool using nixos-rebuild internally, but trying to make infrastructure deployment more convenient.";
+              homepage = "https://git.hamburg.ccc.de/CCCHH/infra-rebuild";
+              license = licenses.gpl3Plus;
+            };
+          };
+          default = infra-rebuild;
+        }
+      );
+    };
+}