adding nixosModule and test

flake.lock

@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1696419054,
+        "narHash": "sha256-EdR+dIKCfqL3voZUDYwcvgRDOektQB9KbhBVcE0/3Mo=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "7131f3c223a2d799568e4b278380cd9dac2b8579",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -1,38 +1,50 @@
 {
   description = "A very basic flake";
 
-  outputs = { self, nixpkgs }: {
+  #nixpkgs for testing framework
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
+
+  outputs = { self, nixpkgs, ... }: let
+    forAllSystems = nixpkgs.lib.genAttrs [ "x86_64-linux" ];
+  in
+  {
 
     packages.x86_64-linux.tasklist = nixpkgs.legacyPackages.x86_64-linux.buildGoModule rec {
       pname = "tasklist";
       version = "1.0";
       vendorHash = "sha256-olHQNClxU4sykBlhlbvTL6wCUYkMxnaQdLnRwvuJffw=";
       src = ./.;
+
+      postInstall = ''
+        cp forms.html $out/
+        '';
     };
 
-    nixosModules.malobeo-tasklist = { config, ... }: 
+    nixosModules.malobeo-tasklist = { config, lib, pkgs, ... }: 
     let
       cfg = config.services.malobeo-tasklist;
       tasklist-pkg = self.packages.x86_64-linux.tasklist;
+      pkgs = nixpkgs.legacyPackages."x86_64-linux";
     in
     {
       options = {
         services.malobeo-tasklist = {
-          enable = nixpkgs.lib.mkOption {
+          enable = lib.mkOption {
             default = false;
-            type = nixpkgs.types.bool;
-            description = nixpkgs.lib.mdDoc ''
+            type = lib.types.bool;
+            description = lib.mdDoc ''
               Enables tasklist
               '';
           };
         };
       };
 
-      config = nixpkgs.lib.mkIf cfg.enable {
-        environment.systemPackages = [ tasklist-pkg];
+      config = lib.mkIf cfg.enable {
+        environment.systemPackages = [ tasklist-pkg ];
 
-        users.users = {
-          malobeo-tasklist = {
+        users = {
+          groups.malobeo-tasklist = {};
+          users.malobeo-tasklist = {
             description = "malobeo tasklist user";
             group = "malobeo-tasklist";
             isNormalUser = true;
@@ -43,18 +55,32 @@
           description = "malobeo tasklist daemon";
           serviceConfig = {
             Type = "simple";
-            ExecStart = "${tasklist-pkg}/bin/tasklist -d /var/lib/malobeo-tasklist/tasklist.db";
+            ExecStart = "${tasklist-pkg}/bin/tasklist -d /var/lib/malobeo-tasklist/tasklist.db -f ${tasklist-pkg}/forms.html";
             Restart = "on-failure";
           };
 
+          preStart = ''
+              mkdir -m 0770 -p "/var/lib/malobeo-tasklist"
+              chown malobeo-tasklist:malobeo-tasklist "/var/lib/malobeo-tasklist"
+            '';
+
           wantedBy = [ "default.target" ];
 
           environment = {
             USER = "malobeo-tasklist";
-            HOME = /var/lib/malobeo-tasklist;
+            HOME = "/var/lib/malobeo-tasklist";
           };
         };
       };
     };
+
+    checks = forAllSystems (system: let
+      checkArgs = {
+        pkgs = nixpkgs.legacyPackages.${system};
+        inherit self;
+      };
+    in {
+      malobeo-tasklist = import ./test/test.nix checkArgs;
+    });
   };
 }

main.go

@@ -195,11 +195,13 @@ func GetNextNDaysOfName(n int, name time.Weekday, current time.Time) []time.Time
 }
 
 const DB_NAME = "./tasklist.db"
+const FORMS_NAME = "./forms.html"
 const TASK_DAY = time.Tuesday
 const AMOUNT_DAYS = 4
 
 func main() {
 	dbName := flag.String("d", DB_NAME, "path to db file")
+	formsName := flag.String("f", FORMS_NAME, "path to form file")
 	flag.Parse()
 
 	db := InitDB(*dbName)
@@ -210,7 +212,7 @@ func main() {
 		return
 	}
 
-	tmpl := template.Must(template.ParseFiles("forms.html"))
+	tmpl := template.Must(template.ParseFiles(*formsName))
 	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		days := GetNextNDaysOfName(AMOUNT_DAYS, TASK_DAY, time.Now())
 		tasklist_arr := QueryResult{make([]Tasklist, AMOUNT_DAYS)}

test/lib.nix

@@ -0,0 +1,21 @@
+# tests/lib.nix
+# based on https://blog.thalheim.io/2023/01/08/how-to-use-nixos-testing-framework-with-flakes/
+# The first argument to this function is the test module itself
+test:
+# These arguments are provided by `flake.nix` on import, see checkArgs
+{ pkgs, self}:
+let
+  inherit (pkgs) lib;
+  # this imports the nixos library that contains our testing framework
+  nixos-lib = import (pkgs.path + "/nixos/lib") {};
+in
+(nixos-lib.runTest {
+  hostPkgs = pkgs;
+  # This speeds up the evaluation by skipping evaluating documentation (optional)
+  defaults.documentation.enable = lib.mkDefault false;
+  # This makes `self` available in the NixOS configuration of our virtual machines.
+  # This is useful for referencing modules or packages from your own flake
+  # as well as importing from other flakes.
+  node.specialArgs = { inherit self; };
+  imports = [ test ];
+}).config.result

test/test.nix

@@ -0,0 +1,21 @@
+# ./tests/hello-world-server.nix
+(import ./lib.nix) {
+  name = "from-nixos";
+  nodes = {
+    # `self` here is set by using specialArgs in `lib.nix`
+    node1 = { self, pkgs, ... }: {
+      imports = [ self.nixosModules.malobeo-tasklist ];
+
+      services.malobeo-tasklist.enable = true;
+      environment.systemPackages = [ pkgs.curl ];
+    };
+  };
+
+  testScript = ''
+    start_all() # wait for our service to start
+    node1.wait_for_unit("malobeo-tasklist")
+    output = node1.succeed("curl localhost:8080")
+    # Check if our webserver returns the expected result
+    assert "tasklist" in output, f"'{output}' does not contain 'Hello world'"
+  '';
+}