Add Nix Flake

.envrc

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

.gitignore

@@ -0,0 +1,3 @@
+.direnv/
+target
+result

flake.lock

@@ -0,0 +1,25 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1728018373,
+        "narHash": "sha256-NOiTvBbRLIOe5F6RbHaAh6++BNjsb149fGZd1T4+KBg=",
+        "rev": "bc947f541ae55e999ffdb4013441347d83b00feb",
+        "revCount": 688563,
+        "type": "tarball",
+        "url": "https://api.flakehub.com/f/pinned/NixOS/nixpkgs/0.1.688563%2Brev-bc947f541ae55e999ffdb4013441347d83b00feb/01925b66-3b70-71bd-b277-924a6c208ba7/source.tar.gz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://flakehub.com/f/NixOS/nixpkgs/0.1.%2A.tar.gz"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,49 @@
+{
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
+    forEachSupportedSystem = f:
+      nixpkgs.lib.genAttrs supportedSystems (system:
+        f {
+          pkgs = import nixpkgs {
+            inherit system;
+            config.allowUnfree = true;
+            config.segger-jlink.acceptLicense = true;
+            config.permittedInsecurePackages = [
+              "segger-jlink-qt4-796s"
+            ];
+          };
+        });
+  in {
+    devShells = forEachSupportedSystem ({pkgs}: {
+      default =
+        pkgs.mkShell.override
+        {
+          # Override stdenv in order to change compiler:
+          # stdenv = pkgs.clangStdenv;
+          # stdenv = pkgs.pkgsCross.arm-embedded.stdenv;
+        }
+        {
+          packages = with pkgs;
+            [
+              pkgsCross.arm-embedded.stdenv.cc
+              segger-jlink
+              clang-tools
+              cmake
+              codespell
+              conan
+              cppcheck
+            ]
+            ++ (
+              if system == "aarch64-darwin"
+              then []
+              else [gdb]
+            );
+        };
+    });
+  };
+}