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import { parse } from 'https://deno.land/std@0.106.0/flags/mod.ts'import { red } from 'https://deno.land/std@0.106.0/fmt/colors.ts'import { dirname, join } from 'https://deno.land/std@0.106.0/path/mod.ts'import { existsSync } from 'https://deno.land/std@0.106.0/fs/exists.ts'
export async function checkVersion(version: string): Promise<string> {  console.log('Looking up latest version...')
  const versionMetaUrl = 'https://cdn.deno.land/aleph/meta/versions.json'  const { latest, versions } = await (await fetch(versionMetaUrl)).json()
  if (version === 'latest') {    version = latest  } else if (!versions.includes(version)) {    version = 'v' + version    if (!versions.includes(version)) {      console.log(`${red('error')}: version(${version}) not found!`)      Deno.exit(1)    }  }
  return version}
export async function install(version: string, forceUpgrade = false) {  const denoExecPath = Deno.execPath()  const cmdExists = existsSync(join(dirname(denoExecPath), 'aleph'))  const p = Deno.run({    cmd: [      denoExecPath,      'install',      '-A',      '--unstable',      '--location', 'http://localhost',      '-n', 'aleph',      '-f',      `https://deno.land/x/aleph@${version}/cli.ts`    ],    stdout: 'null',    stderr: 'inherit'  })  const status = await p.status()  if (status.success) {    if (cmdExists && !forceUpgrade) {      console.log(`Aleph.js is up to ${version}`)    } else {      console.log('Aleph.js was installed successfully')      console.log(`Run 'aleph -h' to get started`)    }  }  Deno.exit(status.code)}
if (import.meta.main) {  const { _: args, ...options } = parse(Deno.args)  const version = await checkVersion(options.v || options.version || args[0] || 'latest')  await install(version, true)}