feat: add flake

.envrc

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

flake.nix

@@ -0,0 +1,97 @@
+{
+  description = "Dev";
+
+  inputs = {
+    crane = {
+      url = "github:ipetkov/crane";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs = {
+        nixpkgs.follows = "nixpkgs";
+        flake-utils.follows = "flake-utils";
+      };
+    };
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+    flake-parts.url = "github:hercules-ci/flake-parts";
+  };
+
+  outputs = inputs @ {
+    flake-parts,
+    nixpkgs,
+    flake-utils,
+    crane,
+    rust-overlay,
+    ...
+  }: let
+    inherit (nixpkgs.lib) optional concatStringsSep;
+    systems = flake-utils.lib.system;
+    flake = flake-utils.lib.eachDefaultSystem (system: let
+      overlays = [ (import rust-overlay) ];
+      pkgs = import nixpkgs {
+        inherit system overlays;
+        config = { allowUnfree = true; };
+      };
+
+      aarch64DarwinExternalCargoCrates = concatStringsSep " " ["[email protected]"];
+
+      defaultShellConf = {
+        buildInputs = [
+          pkgs.clang
+          pkgs.openssl
+
+          pkgs.libclang
+          pkgs.pkg-config
+          pkgs.protobuf
+          pkgs.protoc-gen-go
+          pkgs.protoc-gen-go-grpc
+
+          pkgs.libiconv
+          pkgs.buf
+        ];
+
+        nativeBuildInputs = with pkgs;
+          [ ]
+          ++ optional (system == systems.aarch64-darwin) [
+            darwin.apple_sdk.frameworks.QuartzCore
+            darwin.apple_sdk.frameworks.Foundation
+            darwin.apple_sdk.frameworks.CoreFoundation
+            darwin.apple_sdk.frameworks.CoreServices
+            darwin.apple_sdk.frameworks.Security
+            darwin.apple_sdk.frameworks.SystemConfiguration
+          ]
+          ++ optional (system != systems.aarch64-darwin) [
+            pkgs.syslinux
+          ];
+
+        shellHook = ''
+        '';
+
+      };
+    in {
+      devShells.default = pkgs.mkShell defaultShellConf;
+    });
+  in
+    flake-parts.lib.mkFlake {inherit inputs;} {
+      inherit flake;
+
+      systems = flake-utils.lib.defaultSystems;
+
+      perSystem = {
+        config,
+        system,
+        ...
+      }: {
+        _module.args = {
+          inherit crane;
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [(import rust-overlay)];
+          };
+        };
+      };
+    };
+}
+