feat: implement upgrade command

Author: Je

cli.ts

@@ -13,6 +13,7 @@ const commands = {
     'build': 'Build & Export a static site',
     'upgrade': 'Upgrade Aleph.js command'
 }
+
 const helpMessage = `Aleph.js v${version}
 The React Framework in deno.
 
@@ -60,13 +61,13 @@ async function main() {
     const command = (hasCommand ? String(args.shift()) : 'dev') as keyof typeof commands
 
     // prints aleph.js version
-    if (argOptions.v) {
+    if (argOptions.v && command != 'upgrade') {
         console.log(`aleph.js v${version}`)
         Deno.exit(0)
     }
 
     // prints aleph.js and deno version
-    if (argOptions.version) {
+    if (argOptions.version && command != 'upgrade') {
         const { deno, v8, typescript } = Deno.version
         console.log(`aleph.js ${version}`)
         console.log(`deno ${deno}`)
@@ -122,8 +123,8 @@ async function main() {
         if (imports['https://deno.land/x/aleph/']) {
             const match = String(imports['https://deno.land/x/aleph/']).match(/^http:\/\/(localhost|127.0.0.1):(\d+)\/$/)
             if (match) {
-                const port = parseInt(match[2])
                 const cwd = Deno.cwd()
+                const port = parseInt(match[2])
                 listenAndServe({ port }, async (req: ServerRequest) => {
                     const url = new URL('http://localhost' + req.url)
                     const resp = new Request(req, { pathname: util.cleanPath(url.pathname), params: {}, query: url.searchParams })
@@ -160,7 +161,7 @@ async function main() {
 
     import(`./cli/${command}.ts`).then(({ default: cmd }) => {
         if (command === 'upgrade') {
-            cmd()
+            cmd(argOptions.v || argOptions.version || 'latest')
         } else {
             const appDir = path.resolve(args[0] || '.')
             if (command !== 'init' && !existsDirSync(appDir)) {

cli/upgrade.ts

@@ -1,12 +1,36 @@
+import { colors } from '../std.ts'
+
 export const helpMessage = `
 Usage:
     aleph upgrade
 
 Options:
-    -h, --help  Prints help message
+    -v, --version <version>  The version to upgrade to
+    -h, --help               Prints help message
 `
 
-export default async function () {
-    // todo: upgrade
+async function run(...cmd: string[]) {
+    const p = Deno.run({
+        cmd,
+        stdout: 'piped',
+        stderr: 'piped'
+    })
+    Deno.stdout.write(await p.output())
+    Deno.stderr.write(await p.stderrOutput())
+    p.close()
+}
+
+export default async function (version: string) {
+    const { latest, versions } = await (await fetch('https://cdn.deno.land/aleph/meta/versions.json')).json()
+    if (version === 'latest') {
+        version = latest
+    } else if (!versions.includes(version)) {
+        version = 'v' + version
+        if (!versions.includes(version)) {
+            console.log(`${colors.red('error')}: version(${version}) not found`)
+            Deno.exit(1)
+        }
+    }
+    await run('deno', 'install', '-A', '-f', '-n', 'aleph', `https://deno.land/x/aleph@${version}/cli.ts`)
     Deno.exit(0)
 }