add nix flake

.gitignore

@@ -1,3 +1,5 @@
 kfilt
 dist
 coverage.txt
+/result
+/.envrc

Makefile

@@ -24,3 +24,9 @@ docker:
 
 push: build
 	docker push ryane/kfilt:${GIT_SHA}${GIT_DIRTY}
+
+.PHONY: lint
+lint:
+	golangci-lint run
+
+precommit: build lint test

README.md

@@ -93,6 +93,12 @@ Repository (AUR)](https://aur.archlinux.org/).
 [asdf](https://github.com/asdf-vm/asdf)
 [plugin](https://github.com/feniix/asdf-kfilt/).
 
+### nix flake
+
+```shell
+nix run github:ryane/kfilt#kfilt -- -f ./pkg/decoder/test.yaml -k serviceaccount
+```
+
 ### Running as a Kustomize Plugin (experimental)
 
 See [plugin/kustomize](./plugin/kustomize) for an experimental Kustomize plugin.

flake.nix

@@ -0,0 +1,37 @@
+{
+  description = "kfilt";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }:
+    let
+      kfilt = pkgs:
+        pkgs.buildGo120Module rec {
+          name = "kfilt";
+          version = self.shortRev or "dirty";
+          src = ./.;
+          # this needs to be changed any time there is a change in go.mod
+          # dependencies
+          vendorSha256 = "sha256-c77CzpE9cPyobt87uO0QlkKD+xC/tM7wOy4orM62tnI=";
+          nativeBuildInputs = [ ];
+          CGO_ENABLED = 0;
+          doCheck = false;
+          ldflags = [
+            "-s -w -X github.com/ryane/kfilt/cmd.Version=${version} -X github.com/ryane/kfilt/cmd.GitCommit=${version}"
+          ];
+          excludedPackages = [ "plugin/kustomize" ];
+        };
+      flakeForSystem = nixpkgs: system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          kf = kfilt pkgs;
+        in {
+          packages = { kfilt = kf; };
+          devShell = pkgs.mkShell { packages = with pkgs; [ curl ]; };
+        };
+    in flake-utils.lib.eachDefaultSystem
+    (system: flakeForSystem nixpkgs system);
+}