todoman: add todoman module

Adds Mikilio as maintainer for new module for todoman a standards-based
task manager based on iCalendar

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Co-authored-by: Robert Helgesson <robert@rycee.net>

Update modules/programs/todoman.nix

Co-authored-by: Robert Helgesson <robert@rycee.net>

modules/lib/maintainers.nix

@@ -424,6 +424,12 @@
     github = "mainrs";
     githubId = 5113257;
   };
+  mikilio = {
+    name = "mikilio";
+    email = "official.mikilio+dev@gmail.com";
+    github = "mikilio";
+    githubId = 86004375;
+  };
   kmaasrud = {
     name = "Knut Magnus Aasrud";
     email = "km@aasrud.com";

modules/modules.nix

@@ -236,6 +236,7 @@ let
     ./programs/tmate.nix
     ./programs/tmux.nix
     ./programs/tofi.nix
+    ./programs/todoman.nix
     ./programs/topgrade.nix
     ./programs/translate-shell.nix
     ./programs/urxvt.nix

modules/programs/todoman.nix

@@ -0,0 +1,62 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.programs.todoman;
+
+  format = pkgs.formats.keyValue { };
+
+in {
+
+  meta.maintainers = [ hm.maintainers.mikilio ];
+
+  options.programs.todoman = {
+    enable = lib.mkEnableOption "todoman";
+
+    glob = mkOption {
+      type = types.str;
+      default = "*";
+      description = ''
+        The glob expansion which matches all directories relevant.
+      '';
+      example = "*/*";
+    };
+
+    extraConfig = mkOption {
+      type = types.lines;
+      default = "";
+      description = ''
+        Text for configuration of todoman.
+        The syntax is Python.
+
+        See [docs](`https://todoman.readthedocs.io/en/stable/man.html#id5`).
+        for the full list of options.
+      '';
+      example = ''
+        date_format = "%Y-%m-%d";
+        time_format = "%H:%M";
+        default_list = "Personal";
+        default_due = 48;
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    assertions = [{
+      assertion = config.accounts.calendar ? basePath;
+      message = ''
+        A base directory for calendars must be specified via
+        `accounts.calendar.basePath` to generate config for todoman
+      '';
+    }];
+
+    home.packages = [ pkgs.todoman ];
+
+    xdg.configFile."todoman/config.py".text = lib.concatLines [
+      ''path = "${config.accounts.calendar.basePath}/${cfg.glob}"''
+      cfg.config
+    ];
+  };
+}