chore: remove dependency on sade (#15272)

closes #14175

removes dependency on sade and transitive dependency on mri

I thought this required a newer version of Node, but turns out we could
actually merge this in Kit 2

---------

Co-authored-by: Tee Ming <chewteeming01@gmail.com>

Author: benmccann

.changeset/poor-dragons-watch.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+chore: remove dependency on `sade`

packages/kit/package.json

@@ -28,7 +28,6 @@
 		"kleur": "^4.1.5",
 		"magic-string": "^0.30.5",
 		"mrmime": "^2.0.0",
-		"sade": "^1.8.1",
 		"set-cookie-parser": "^3.0.0",
 		"sirv": "^3.0.0"
 	},

packages/kit/src/cli.js

@@ -1,7 +1,7 @@
 import fs from 'node:fs';
 import process from 'node:process';
+import { parseArgs } from 'node:util';
 import colors from 'kleur';
-import sade from 'sade';
 import { load_config } from './core/config/index.js';
 import { coalesce_to_error } from './utils/error.js';
 
@@ -20,28 +20,76 @@ function handle_error(e) {
 }
 
 const pkg = JSON.parse(fs.readFileSync(new URL('../package.json', import.meta.url), 'utf-8'));
-const prog = sade('svelte-kit').version(pkg.version);
-
-prog
-	.command('sync')
-	.describe('Synchronise generated type definitions')
-	.option('--mode', 'Specify a mode for loading environment variables', 'development')
-	.action(async ({ mode }) => {
-		const config_files = ['js', 'ts']
-			.map((ext) => `svelte.config.${ext}`)
-			.filter((f) => fs.existsSync(f));
-		if (config_files.length === 0) {
-			console.warn(`Missing Svelte config file in ${process.cwd()} — skipping`);
-			return;
-		}
-
-		try {
-			const config = await load_config();
-			const sync = await import('./core/sync/sync.js');
-			sync.all_types(config, mode);
-		} catch (error) {
-			handle_error(error);
-		}
+
+const help = `
+  Usage: svelte-kit <command> [options]
+
+  Commands:
+    sync        Synchronise generated type definitions
+
+  Options:
+    --version, -v   Show version number
+    --help, -h      Show this help message
+
+  Sync Options:
+    --mode <mode>   Specify a mode for loading environment variables (default: development)
+`;
+
+let parsed;
+try {
+	parsed = parseArgs({
+		options: {
+			version: { type: 'boolean', short: 'v' },
+			help: { type: 'boolean', short: 'h' },
+			mode: { type: 'string', default: 'development' }
+		},
+		allowPositionals: true,
+		strict: true
 	});
+} catch (err) {
+	const error = /** @type {Error} */ (err);
+	console.error(colors.bold().red(`> ${error.message}`));
+	console.log(help);
+	process.exit(1);
+}
+
+const { values, positionals } = parsed;
+
+if (values.version) {
+	console.log(pkg.version);
+	process.exit(0);
+}
 
-prog.parse(process.argv, { unknown: (arg) => `Unknown option: ${arg}` });
+if (values.help) {
+	console.log(help);
+	process.exit(0);
+}
+
+const command = positionals[0];
+
+if (!command) {
+	console.log(help);
+	process.exit(0);
+}
+
+if (command === 'sync') {
+	const config_files = ['js', 'ts']
+		.map((ext) => `svelte.config.${ext}`)
+		.filter((f) => fs.existsSync(f));
+	if (config_files.length === 0) {
+		console.warn(`Missing Svelte config file in ${process.cwd()} — skipping`);
+		process.exit(0);
+	}
+
+	try {
+		const config = await load_config();
+		const sync = await import('./core/sync/sync.js');
+		sync.all_types(config, values.mode);
+	} catch (error) {
+		handle_error(error);
+	}
+} else {
+	console.error(colors.bold().red(`> Unknown command: ${command}`));
+	console.log(help);
+	process.exit(1);
+}