0.3.0. (#4)

scripts/append-ga.cjs

@@ -0,0 +1,43 @@
+const fs = require('fs');
+const path = require('path');
+
+const SCRIPT =
+`<script async src="https://www.googletagmanager.com/gtag/js?id=G-8N9MBTQKCK"></script>
+<script>
+	window.dataLayer = window.dataLayer || [];
+	function gtag() {
+		dataLayer.push(arguments);
+	}
+	gtag('js', new Date());
+	gtag('config', 'G-8N9MBTQKCK');
+</script>`;
+
+function appendGa(path) {
+	let html = fs.readFileSync(path, 'utf8');
+	if (html.includes(SCRIPT)) {
+		console.log(`👌 ${path} already has tracking`);
+		return;
+	}
+	const pos = html.lastIndexOf('</body>');
+	if (pos < 0) {
+		throw new Error('Could not find </body> tag');
+	}
+	html = html.substring(0, pos) + SCRIPT + html.substring(pos);
+	fs.writeFileSync(path, html, 'utf8');
+	console.log(`✅ ${path} updated`);
+}
+
+const directory = process.argv[2];
+if (!directory) {
+	throw new Error('Please specify a directory');
+}
+
+const dirPath = path.join(__dirname, '..', directory);
+fs.readdir(dirPath, (_, files) => {
+	files.forEach(file => {
+		if (file.endsWith('.html')) {
+			const filePath = path.join(dirPath, file);
+			appendGa(filePath);
+		}
+	});
+});