Add customizable initiative.

.gitignore

@@ -1,3 +1,7 @@
 # IDE
 .idea/
 .vs/
+
+# Node Modules
+node_modules/
+package-lock.json

gulpfile.js

@@ -0,0 +1,32 @@
+const gulp = require('gulp');
+const less = require('gulp-less');
+
+/* ----------------------------------------- */
+/*  Compile LESS
+/* ----------------------------------------- */
+
+const SIMPLE_LESS = ["styles/*.less"];
+function compileLESS() {
+  return gulp.src("styles/simple.less")
+    .pipe(less())
+    .pipe(gulp.dest("./styles/"))
+}
+const css = gulp.series(compileLESS);
+
+/* ----------------------------------------- */
+/*  Watch Updates
+/* ----------------------------------------- */
+
+function watchUpdates() {
+  gulp.watch(SIMPLE_LESS, css);
+}
+
+/* ----------------------------------------- */
+/*  Export Tasks
+/* ----------------------------------------- */
+
+exports.default = gulp.series(
+  gulp.parallel(css),
+  watchUpdates
+);
+exports.css = css;

lang/en.json

@@ -0,0 +1,9 @@
+{
+  "SETTINGS.SimpleMacroShorthandN": "Shortened Macro Syntax",
+  "SETTINGS.SimpleMacroShorthandL": "Enable a shortened macro syntax which allows referencing attributes directly, for example @str instead of @attributes.str.value. Disable this setting if you need the ability to reference the full attribute model, for example @attributes.str.label.",
+  "SETTINGS.SimpleInitFormulaN": "Initiative Formula",
+  "SETTINGS.SimpleInitFormulaL": "Enter an initiative formula, such as d20+@dex",
+
+  "SIMPLE.NotifyInitFormulaUpdated": "Initiative formula was updated to:",
+  "SIMPLE.NotifyInitFormulaInvalid": "Initiative formula was invalid:"
+}

module/simple.js

@@ -17,7 +17,7 @@ Hooks.once("init", async function() {
   console.log(`Initializing Simple Worldbuilding System`);
 
   /**
-	 * Set an initiative formula for the system
+   * Set an initiative formula for the system. This will be updated later.
    * @type {String}
    */
   CONFIG.Combat.initiative = {
@@ -36,11 +36,50 @@ Hooks.once("init", async function() {
 
   // Register system settings
   game.settings.register("worldbuilding", "macroShorthand", {
-    name: "Shortened Macro Syntax",
-    hint: "Enable a shortened macro syntax which allows referencing attributes directly, for example @str instead of @attributes.str.value. Disable this setting if you need the ability to reference the full attribute model, for example @attributes.str.label.",
+    name: "SETTINGS.SimpleMacroShorthandN",
+    hint: "SETTINGS.SimpleMacroShorthandL",
     scope: "world",
     type: Boolean,
     default: true,
     config: true
   });
+
+  // Register initiative setting.
+  game.settings.register("worldbuilding", "initFormula", {
+    name: "SETTINGS.SimpleInitFormulaN",
+    hint: "SETTINGS.SimpleInitFormulaL",
+    scope: "world",
+    type: String,
+    default: "1d20",
+    config: true,
+    onChange: formula => _simpleUpdateInit(formula, true)
+  });
+
+  // Retrieve and assign the initiative formula setting.
+  const initFormula = game.settings.get("worldbuilding", "initFormula");
+  _simpleUpdateInit(initFormula);
+
+  /**
+   * Update the initiative formula.
+   * @param {string} formula - Dice formula to evaluate.
+   * @param {boolean} notify - Whether or not to post nofications.
+   */
+  function _simpleUpdateInit(formula, notify = false) {
+    // If the formula is valid, use it.
+    try {
+      new Roll(formula).roll();
+      CONFIG.Combat.initiative.formula = formula;
+      if (notify) {
+        ui.notifications.notify(game.i18n.localize("SIMPLE.NotifyInitFormulaUpdated") + ` ${formula}`);
+      }
+    }
+    // Otherwise, fall back to a d20.
+    catch (error) {
+      CONFIG.Combat.initiative.formula = "1d20";
+      if (notify) {
+        ui.notifications.error(game.i18n.localize("SIMPLE.NotifyInitFormulaInvalid") + ` ${formula}`);
+      }
+    }
+  }
+
 });

package.json

@@ -0,0 +1,21 @@
+{
+  "name": "worldbuilding",
+  "version": "1.0.0",
+  "description": "CSS compiler for the Worldbuilding system",
+  "scripts": {
+    "css": "gulp css",
+    "watch": "gulp",
+    "gulp": "gulp"
+  },
+  "browserslist": [
+    "last 3 versions"
+  ],
+  "author": "",
+  "license": "MIT",
+  "private": true,
+  "dependencies": {
+    "gulp": "^4.0.2",
+    "gulp-less": "^4.0.1"
+  },
+  "devDependencies": {}
+}

system.json

@@ -10,7 +10,13 @@
   "esmodules": ["module/simple.js"],
   "styles": ["styles/simple.css"],
   "packs": [],
-  "languages": [],
+  "languages": [
+    {
+      "lang": "en",
+      "name": "English",
+      "path": "lang/en.json"
+    }
+  ],
   "gridDistance": 5,
   "gridUnits": "ft",
   "primaryTokenAttribute": "health",