Dev flake.

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -16,3 +16,5 @@ __pycache__
 
 # clangd
 app/.cache/
+
+.direnv

flake.nix

@@ -0,0 +1,53 @@
+{
+  description = "ZMK/Zephyr dev flake";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    systems.url = "github:nix-systems/default";
+    flake-utils = {
+      url = "github:numtide/flake-utils";
+      inputs.systems.follows = "systems";
+    };
+  };
+
+  outputs =
+    { nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          packages = with pkgs; [
+            python3Full
+            python313Packages.west
+            # From requirements-base.txt
+            python313Packages.pyelftools
+            python313Packages.pyyaml
+            python313Packages.pykwalify
+            # python313Packages.canopen # Try to update later, it's proken for now. https://github.com/NixOS/nixpkgs/pull/423735#pullrequestreview-3036010982
+            python313Packages.packaging
+            python313Packages.patool
+            python313Packages.psutil
+            python313Packages.pylink-square
+            python313Packages.pyserial
+            python313Packages.requests
+            python313Packages.semver
+            python313Packages.tqdm
+            python313Packages.reuse
+            python313Packages.anytree
+            python313Packages.intelhex
+            # From requirements-extras.txt
+            python313Packages.gitpython
+            gitlint
+            python313Packages.junit2html
+            python313Packages.lpc-checksum
+            python313Packages.spsdk
+            python313Packages.pillow
+            python313Packages.pygithub
+            python313Packages.graphviz
+          ];
+        };
+      }
+    );
+}