CLI: add prerelease warning

.changeset/stupid-pots-give.md

@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Add CLI warnings when running a prerelease or outdated version of Astro

packages/astro/src/core/dev/index.ts

@@ -3,7 +3,7 @@ import type { AddressInfo } from 'net';
 import { performance } from 'perf_hooks';
 import type { AstroConfig } from '../../@types/astro';
 import { createVite } from '../create-vite.js';
-import { defaultLogOptions, info, LogOptions } from '../logger.js';
+import { defaultLogOptions, info, warn, LogOptions } from '../logger.js';
 import * as vite from 'vite';
 import * as msg from '../messages.js';
 import { getLocalAddress } from './util.js';
@@ -37,6 +37,7 @@ export default async function dev(config: AstroConfig, options: DevOptions = { l
 	const viteConfig = await createVite(viteUserConfig, { astroConfig: config, logging: options.logging, mode: 'dev' });
 	const viteServer = await vite.createServer(viteConfig);
 	await viteServer.listen(config.devOptions.port);
+
 	const address = viteServer.httpServer!.address() as AddressInfo;
 	const localAddress = getLocalAddress(address.address, config.devOptions.hostname);
 	// Log to console
@@ -47,6 +48,15 @@ export default async function dev(config: AstroConfig, options: DevOptions = { l
 		msg.devStart({ startupTime: performance.now() - devStart, port: address.port, localAddress, networkAddress: address.address, site, https: !!viteUserConfig.server?.https })
 	);
 
+	const currentVersion = process.env.PACKAGE_VERSION ?? '0.0.0';
+	if (currentVersion.includes('-')) {
+		warn(
+			options.logging,
+			null,
+			msg.prerelease({ currentVersion })
+		);
+	} 
+
 	return {
 		address,
 		stop: () => viteServer.close(),

packages/astro/src/core/messages.ts

@@ -4,7 +4,7 @@
 
 import type { AddressInfo } from 'net';
 import stripAnsi from 'strip-ansi';
-import { bold, dim, red, green, magenta, yellow, cyan, bgGreen, black } from 'kleur/colors';
+import { bold, dim, red, green, underline, yellow, bgYellow, cyan, bgGreen, black } from 'kleur/colors';
 import { pad, emoji } from './dev/util.js';
 
 const PREFIX_PADDING = 6;
@@ -47,6 +47,7 @@ export function devStart({
 	const version = process.env.PACKAGE_VERSION ?? '0.0.0';
 	const rootPath = site ? site.pathname : '/';
 	const toDisplayUrl = (hostname: string) => `${https ? 'https' : 'http'}://${hostname}:${port}${rootPath}`;
+
 	const messages = [
 		`${emoji('🚀 ', '')}${bgGreen(black(` astro `))} ${green(`v${version}`)} ${dim(`started in ${Math.round(startupTime)}ms`)}`,
 		'',
@@ -57,6 +58,14 @@ export function devStart({
 	return messages.map((msg) => `  ${msg}`).join('\n');
 }
 
+export function prerelease({ currentVersion }: { currentVersion: string }) {
+	const tag = currentVersion.split('-').slice(1).join('-').replace(/\..*$/, '');
+	const badge = bgYellow(black(` ${tag} `));
+	const headline = yellow(`▶ This is a ${badge} prerelease build`);
+	const warning = `  Feedback? ${underline('https://astro.build/issues')}`
+	return [headline, warning, ''].map((msg) => `  ${msg}`).join('\n');
+}
+
 /** Display port in use */
 export function portInUse({ port }: { port: number }): string {
 	return `Port ${port} in use. Trying a new one…`;