chore: replace gulp by a pure rollup based build

tools/link-package.js

@@ -0,0 +1,55 @@
+// SPDX-FileCopyrightText: 2021 Johannes Loher
+//
+// SPDX-License-Identifier: MIT
+
+import fs from "fs-extra";
+import path from "node:path";
+import yargs from "yargs";
+import { hideBin } from "yargs/helpers";
+
+import { destinationDirectory, distDirectory, foundryconfigFile, name, sourceDirectory } from "./const.js";
+
+/**
+ * Get the data path of Foundry VTT based on what is configured in the {@link foundryconfigFile}.
+ */
+function getDataPath() {
+    const config = fs.readJSONSync(foundryconfigFile);
+
+    if (config?.dataPath) {
+        if (!fs.existsSync(path.resolve(config.dataPath))) {
+            throw new Error("User data path invalid, no Data directory found");
+        }
+        return path.resolve(config.dataPath);
+    } else {
+        throw new Error(`No user data path defined in ${foundryconfigFile}`);
+    }
+}
+/**
+ * Link the built package to the user data folder.
+ * @param {boolean} clean Whether to remove the link instead of creating it
+ */
+async function linkPackage(clean) {
+    if (!fs.existsSync(path.resolve(sourceDirectory, "system.json"))) {
+        throw new Error("Could not find system.json");
+    }
+
+    const linkDirectory = path.resolve(getDataPath(), destinationDirectory, name);
+
+    if (clean) {
+        console.log(`Removing link to built package at ${linkDirectory}.`);
+        await fs.remove(linkDirectory);
+    } else if (!fs.existsSync(linkDirectory)) {
+        console.log(`Linking built package to ${linkDirectory}.`);
+        await fs.ensureDir(path.resolve(linkDirectory, ".."));
+        await fs.symlink(path.resolve(".", distDirectory), linkDirectory);
+    }
+}
+
+const argv = yargs(hideBin(process.argv)).usage("Usage: $0").option("clean", {
+    alias: "c",
+    type: "boolean",
+    default: false,
+    description: "Remove the link instead of creating it",
+}).argv;
+const clean = argv.c;
+await linkPackage(clean);