Add nix flake support

.envrc

@@ -0,0 +1 @@
+use nix

.gitignore

@@ -3,3 +3,5 @@ bin
 build
 .arg
 .env
+result
+.direnv

default.nix

@@ -0,0 +1,21 @@
+{ pkgs ? (
+    let
+      inherit (builtins) fetchTree fromJSON readFile;
+      inherit ((fromJSON (readFile ./flake.lock)).nodes) nixpkgs gomod2nix;
+    in
+    import (fetchTree nixpkgs.locked) {
+      overlays = [
+        (import "${fetchTree gomod2nix.locked}/overlay.nix")
+      ];
+    }
+  )
+, buildGoApplication ? pkgs.buildGoApplication
+}:
+
+buildGoApplication {
+  pname = "frp-port-keeper";
+  version = "0.2.0";
+  pwd = ./.;
+  src = ./.;
+  modules = ./gomod2nix.toml;
+}

flake.nix

@@ -0,0 +1,29 @@
+{
+  description = "A basic gomod2nix flake";
+
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  inputs.flake-utils.url = "github:numtide/flake-utils";
+  inputs.gomod2nix.url = "github:nix-community/gomod2nix";
+  inputs.gomod2nix.inputs.nixpkgs.follows = "nixpkgs";
+  inputs.gomod2nix.inputs.flake-utils.follows = "flake-utils";
+
+  outputs = { self, nixpkgs, flake-utils, gomod2nix }:
+    (flake-utils.lib.eachDefaultSystem
+      (system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+
+          # The current default sdk for macOS fails to compile go projects, so we use a newer one for now.
+          # This has no effect on other platforms.
+          callPackage = pkgs.darwin.apple_sdk_11_0.callPackage or pkgs.callPackage;
+        in
+        {
+          packages.default = callPackage ./. {
+            inherit (gomod2nix.legacyPackages.${system}) buildGoApplication;
+          };
+          devShells.default = callPackage ./shell.nix {
+            inherit (gomod2nix.legacyPackages.${system}) mkGoEnv gomod2nix;
+          };
+        })
+    );
+}

gomod2nix.toml

@@ -0,0 +1,90 @@
+schema = 3
+
+[mod]
+  [mod."github.com/bytedance/sonic"]
+    version = "v1.8.0"
+    hash = "sha256-Y3LcMK+G0hkOdTycEOTeDuar1umagsT5ux7aVQ+MlKw="
+  [mod."github.com/chenzhuoyu/base64x"]
+    version = "v0.0.0-20221115062448-fe3a3abad311"
+    hash = "sha256-xmONcYkIXgXomJYHR521Dr9F3XbbUM14bgf7KJ5FIFc="
+  [mod."github.com/gin-contrib/sse"]
+    version = "v0.1.0"
+    hash = "sha256-zYbMTao+1F+385Lvsba9roLmmt9eYqr57sUWo0LCVhw="
+  [mod."github.com/gin-gonic/gin"]
+    version = "v1.9.0"
+    hash = "sha256-vLkfoIeChmCKcLxRfp080tO0/2n6QBoCLxlFdUEEv+s="
+  [mod."github.com/go-playground/locales"]
+    version = "v0.14.1"
+    hash = "sha256-BMJGAexq96waZn60DJXZfByRHb8zA/JP/i6f/YrW9oQ="
+  [mod."github.com/go-playground/universal-translator"]
+    version = "v0.18.1"
+    hash = "sha256-2/B2qP51zfiY+k8G0w0D03KXUc7XpWj6wKY7NjNP/9E="
+  [mod."github.com/go-playground/validator/v10"]
+    version = "v10.11.2"
+    hash = "sha256-0mKf4ybFK/ZWoIUbmMXB3Fo9AoIqT5zAP30ce4TsBns="
+  [mod."github.com/goccy/go-json"]
+    version = "v0.10.0"
+    hash = "sha256-+m829gnYn/nS0FdWyzrgmAe8a3Q7G0sriZvgwQINHF8="
+  [mod."github.com/json-iterator/go"]
+    version = "v1.1.12"
+    hash = "sha256-To8A0h+lbfZ/6zM+2PpRpY3+L6725OPC66lffq6fUoM="
+  [mod."github.com/klauspost/cpuid/v2"]
+    version = "v2.0.9"
+    hash = "sha256-0rHlHzEVaDdkVbRJDhnAJjfJUmAHOYjXN5u7VoCi5uk="
+  [mod."github.com/leodido/go-urn"]
+    version = "v1.2.1"
+    hash = "sha256-02UfyUwMtTGMUYJOEmiJYOc3LXumr+f7pCT3J7h7iFg="
+  [mod."github.com/mattn/go-isatty"]
+    version = "v0.0.17"
+    hash = "sha256-c1u9eiMF9wLXgGvPTB5DH6S8uuCPqWZJTa6tCGuB3Ek="
+  [mod."github.com/modern-go/concurrent"]
+    version = "v0.0.0-20180228061459-e0a39a4cb421"
+    hash = "sha256-+bdeHUArnpkk4eMQIwXm9K249NkpwAjoTrXrGn/4VUE="
+  [mod."github.com/modern-go/reflect2"]
+    version = "v1.0.2"
+    hash = "sha256-+W9EIW7okXIXjWEgOaMh58eLvBZ7OshW2EhaIpNLSBU="
+  [mod."github.com/pelletier/go-toml/v2"]
+    version = "v2.0.6"
+    hash = "sha256-BxAeApnn5H+OLlH3TXGvIbtC6LmbRnjwbcfT1qMZ4PE="
+  [mod."github.com/philippgille/gokv"]
+    version = "v0.6.0"
+    hash = "sha256-YuxnxF2GXWDqCui2BVAOl279j+U5MvTsHhIGd0Pi+Ds="
+  [mod."github.com/philippgille/gokv/encoding"]
+    version = "v0.0.0-20191011213304-eb77f15b9c61"
+    hash = "sha256-W7GYx3SZlTATh/+XnPuZzQ5jVlObsSEWIIgi4xoIaa0="
+  [mod."github.com/philippgille/gokv/file"]
+    version = "v0.6.0"
+    hash = "sha256-ZwVi4pXX5P0iT6pNUnwIUx3NVZIIW3lGmw+JvR35PaE="
+  [mod."github.com/philippgille/gokv/util"]
+    version = "v0.0.0-20191011213304-eb77f15b9c61"
+    hash = "sha256-eTdMFNM5n4Ai+FzYZXGX24D9WjXHz8sxeEPgpwXrdqs="
+  [mod."github.com/twitchyliquid64/golang-asm"]
+    version = "v0.15.1"
+    hash = "sha256-HLk6oUe7EoITrNvP0y8D6BtIgIcmDZYtb/xl/dufIoY="
+  [mod."github.com/ugorji/go/codec"]
+    version = "v1.2.9"
+    hash = "sha256-LUyCclmjVNbf6iiztNOrEsKzrwmG3mpmM1ykzh/BQ/s="
+  [mod."golang.org/x/arch"]
+    version = "v0.0.0-20210923205945-b76863e36670"
+    hash = "sha256-GRRcSkvNi5Cf9q3UkNVux5yy8n5mPQIFofv1fSSYqQ0="
+  [mod."golang.org/x/crypto"]
+    version = "v0.5.0"
+    hash = "sha256-5L4rCFZ0IMT9aQIeMbfOFbhwi03nXE/EeWuXup+Aeoc="
+  [mod."golang.org/x/net"]
+    version = "v0.7.0"
+    hash = "sha256-LgZYZRwtMqm+soNh+esxDSeRuIDxRGb9OEfYaFJHCDI="
+  [mod."golang.org/x/sys"]
+    version = "v0.5.0"
+    hash = "sha256-0LTr3KeJ1OMQAwYUQo1513dXJtQAJn5Dq8sFkc8ps1U="
+  [mod."golang.org/x/text"]
+    version = "v0.7.0"
+    hash = "sha256-ydgUqX+t5Qke16C6d3FP/06U/N1n+rUKpLRFj4KXjwk="
+  [mod."google.golang.org/protobuf"]
+    version = "v1.28.1"
+    hash = "sha256-sTJYgvlv5is7vHNxcuigF2lNASp0QonhUgnrguhfHSU="
+  [mod."gopkg.in/ini.v1"]
+    version = "v1.67.0"
+    hash = "sha256-V10ahGNGT+NLRdKUyRg1dos5RxLBXBk1xutcnquc/+4="
+  [mod."gopkg.in/yaml.v3"]
+    version = "v3.0.1"
+    hash = "sha256-FqL9TKYJ0XkNwJFnq9j0VvJ5ZUU1RvH/52h/f5bkYAU="

shell.nix

@@ -0,0 +1,24 @@
+{ pkgs ? (
+    let
+      inherit (builtins) fetchTree fromJSON readFile;
+      inherit ((fromJSON (readFile ./flake.lock)).nodes) nixpkgs gomod2nix;
+    in
+    import (fetchTree nixpkgs.locked) {
+      overlays = [
+        (import "${fetchTree gomod2nix.locked}/overlay.nix")
+      ];
+    }
+  )
+, mkGoEnv ? pkgs.mkGoEnv
+, gomod2nix ? pkgs.gomod2nix
+}:
+
+let
+  goEnv = mkGoEnv { pwd = ./.; };
+in
+pkgs.mkShell {
+  packages = [
+    goEnv
+    gomod2nix
+  ];
+}