Convert to flake

default.nix

@@ -1,25 +0,0 @@
-{ pkgs ? import <nixpkgs> { } }:
-let
-  gitignoreSrc = pkgs.fetchFromGitHub {
-    owner = "hercules-ci";
-    repo = "gitignore";
-    rev = "c4662e662462e7bf3c2a968483478a665d00e717";
-    sha256 = "1npnx0h6bd0d7ql93ka7azhj40zgjp815fw2r6smg8ch9p7mzdlx";
-  };
-  inherit (import gitignoreSrc { inherit (pkgs) lib; }) gitignoreSource;
-in
-pkgs.buildGoModule {
-  name = "bang-evaluator";
-
-  src = gitignoreSource ./.;
-
-  subPackages = [ "." ];
-
-  vendorSha256 = "11r1l5lcdfm3wymrkbddl5khpjmr30jln31l40mfyyy9msnqayf3";
-
-  preBuild = ''go generate ./...'';
-
-  doCheck = false; # no tests (yet?)
-
-  meta.license = pkgs.lib.licenses.mit;
-}

flake.lock

@@ -0,0 +1,43 @@
+{
+  "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1619345332,
+        "narHash": "sha256-qHnQkEp1uklKTpx3MvKtY6xzgcqXDsz5nLilbbuL+3A=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "2ebf2558e5bf978c7fb8ea927dfaed8fefab2e28",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1619907998,
+        "narHash": "sha256-laZ15ZpbbqQof9XptcfgI8rvygiD69UeIzf4tGV7vJk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "2cca79be09cbf2c3c4a6ca5d095b1c60135cafc9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,60 @@
+{
+  description = "A web service to evaluate DuckDuckGo-style bangs in search queries";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, flake-utils, nixpkgs }: {
+    overlay = final: prev: {
+      bang-evaluator = prev.buildGoModule {
+        name = "bang-evaluator";
+
+        src = self;
+
+        subPackages = [ "." ];
+
+        vendorSha256 = "11r1l5lcdfm3wymrkbddl5khpjmr30jln31l40mfyyy9msnqayf3";
+
+        preBuild = ''go generate ./...'';
+
+        doCheck = false; # no tests (yet?)
+
+        meta = with prev.lib; {
+          license = licenses.mit;
+          maintainer = with mainatiners; [ sbruder ];
+        };
+      };
+    };
+
+    nixosModules.bang-evaluator = {
+      imports = [ ./module.nix ];
+
+      nixpkgs.overlays = [
+        self.overlay
+      ];
+    };
+  } // flake-utils.lib.eachSystem [ "aarch64-linux" "x86_64-linux" ] (system:
+    let
+      pkgs = import nixpkgs { inherit system; overlays = [ self.overlay ]; };
+    in
+    rec {
+      packages = {
+        inherit (pkgs) bang-evaluator;
+      };
+
+      defaultPackage = packages.bang-evaluator;
+      defaultApp = {
+        type = "app";
+        program = "${packages.bang-evaluator}/bin/evaluator";
+      };
+
+      checks = {
+        integration-test = import ./test.nix {
+          inherit nixpkgs system;
+          inherit (self) nixosModules;
+        };
+      };
+    });
+}

module.nix

@@ -7,7 +7,7 @@ in
     enable = lib.mkEnableOption "bang-evaluator";
     package = lib.mkOption {
       type = lib.types.package;
-      default = import ./default.nix { inherit pkgs; };
+      default = pkgs.bang-evaluator;
       example = "pkgs.bang-exporter-fork";
       description = "The package to use for bang-exporter";
     };

test.nix

@@ -1,11 +1,15 @@
+{ nixpkgs, system, nixosModules }:
+with import (nixpkgs + "/nixos/lib/testing-python.nix")
+{
+  inherit system;
+};
 let
   port = 8082;
 in
-import <nixpkgs/nixos/tests/make-test-python.nix> ({ pkgs, ... }:
-{
+makeTest {
   nodes = {
     server = {
-      imports = [ ./module.nix ];
+      imports = [ nixosModules.bang-evaluator ];
 
       services.bang-evaluator = {
         enable = true;
@@ -14,7 +18,9 @@ import <nixpkgs/nixos/tests/make-test-python.nix> ({ pkgs, ... }:
 
       networking.firewall.allowedTCPPorts = [ port ];
     };
-    client = { };
+    client = { pkgs, ... }: {
+      environment.systemPackages = with pkgs; [ curl ];
+    };
   };
 
   testScript = ''
@@ -29,7 +35,7 @@ import <nixpkgs/nixos/tests/make-test-python.nix> ({ pkgs, ... }:
         return client.succeed(
             " ".join(
                 [
-                    "${pkgs.curl}/bin/curl",
+                    "curl",
                     "-s",
                     "-o/dev/null",
                     "-w",
@@ -52,4 +58,4 @@ import <nixpkgs/nixos/tests/make-test-python.nix> ({ pkgs, ... }:
         == "https://startpage.com/sp/search?query=foo"
     )
   '';
-})
+}