Add Nix flake

flake.lock

@@ -0,0 +1,84 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nix-ros-overlay": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1758094726,
+        "narHash": "sha256-agLnClczRtYY+kQFh5dv4wGNhtFNKK7KFOmypDhsWCs=",
+        "owner": "lopsided98",
+        "repo": "nix-ros-overlay",
+        "rev": "9d0557032aadb65df065b1972a632572b57234b5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lopsided98",
+        "ref": "master",
+        "repo": "nix-ros-overlay",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1744849697,
+        "narHash": "sha256-S9hqvanPSeRu6R4cw0OhvH1rJ+4/s9xIban9C4ocM/0=",
+        "owner": "lopsided98",
+        "repo": "nixpkgs",
+        "rev": "6318f538166fef9f5118d8d78b9b43a04bb049e4",
+        "type": "github"
+      },
+      "original": {
+        "owner": "lopsided98",
+        "ref": "nix-ros",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nix-ros-overlay": "nix-ros-overlay",
+        "nixpkgs": [
+          "nix-ros-overlay",
+          "nixpkgs"
+        ]
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,32 @@
+{
+  inputs = {
+    nix-ros-overlay.url = "github:lopsided98/nix-ros-overlay/master";
+    nixpkgs.follows = "nix-ros-overlay/nixpkgs";  # IMPORTANT!!!
+  };
+  outputs = { self, nix-ros-overlay, nixpkgs }:
+    nix-ros-overlay.inputs.flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ nix-ros-overlay.overlays.default ];
+        };
+      in {
+        devShells.default = pkgs.mkShell {
+          name = "ASTRA Anchor";
+          packages = [
+            pkgs.colcon
+            pkgs.python312Packages.pyserial
+            pkgs.python312Packages.pygame
+            (with pkgs.rosPackages.humble; buildEnv {
+              paths = [
+                ros-core ros2cli ros2run ros2bag ament-cmake-core python-cmake-module
+              ];
+            })
+          ];
+        };
+      });
+  nixConfig = {
+    extra-substituters = [ "https://ros.cachix.org" ];
+    extra-trusted-public-keys = [ "ros.cachix.org-1:dSyZxI8geDCJrwgvCOHDoAfOm5sV1wCPjBkKL+38Rvo=" ];
+  };
+}