update at 2025-10-10 17:00:09

tools/esbuild-obfuscator-plugin.mjs

@@ -0,0 +1,48 @@
+import { promises as fs } from "fs";
+
+// Esbuild plugin that optionally obfuscates the emitted bundle with javascript-obfuscator.
+export default function javascriptObfuscatorPlugin(obfuscatorOptions = {}) {
+	let obfuscatorPromise;
+
+	const loadObfuscator = async () => {
+		if (!obfuscatorPromise) {
+			obfuscatorPromise = import("javascript-obfuscator")
+				.then((module) => module.default ?? module)
+				.catch((error) => {
+					console.warn("[esbuild] javascript-obfuscator unavailable, skipping obfuscation.", error);
+					return null;
+				});
+		}
+		return obfuscatorPromise;
+	};
+
+	// Default to preserving line breaks unless explicitly overridden.
+	if (typeof obfuscatorOptions.compact === "undefined") {
+		obfuscatorOptions.compact = false;
+	}
+
+	return {
+		name: "javascript-obfuscator",
+		setup(build) {
+			build.onEnd(async (result) => {
+				if (result.errors.length) return;
+				const outfile = build.initialOptions.outfile;
+				if (!outfile) return;
+
+				try {
+					const obfuscator = await loadObfuscator();
+					if (!obfuscator?.obfuscate) return;
+
+					const source = await fs.readFile(outfile, "utf8");
+					const obfuscatedCode = obfuscator
+						.obfuscate(source, obfuscatorOptions)
+						.getObfuscatedCode();
+
+					await fs.writeFile(outfile, obfuscatedCode, "utf8");
+				} catch (error) {
+					console.warn("[esbuild] javascript-obfuscator plugin failed, continuing without obfuscation.", error);
+				}
+			});
+		},
+	};
+}