feat(cli): use cac for cli (#264)

cli.js

@@ -1,20 +1,32 @@
 #!/usr/bin/env node
 const path = require('path')
 const sao = require('sao')
+const cac = require('cac')
 const chalk = require('chalk')
 const { version } = require('./package.json')
 
 const generator = path.resolve(__dirname, './')
-// In a custom directory or current directory
-const outDir = path.resolve(process.argv[2] || '.')
 
-console.log(chalk`{cyan create-nuxt-app v${version}}`)
-console.log(chalk`✨  Generating Nuxt.js project in {cyan ${outDir}}`)
+const cli = cac('create-nuxt-app')
 
-// See https://sao.js.org/#/advanced/standalone-cli
-sao({ generator, outDir, logLevel: 2 })
-  .run()
-  .catch((err) => {
-    console.trace(err)
-    process.exit(1)
+cli
+  .command('[out-dir]', 'Generate in a custom directory or current directory')
+  .option('--edge', 'To install `nuxt-edge` instead of `nuxt`')
+  .action((outDir = '.') => {
+    console.log(chalk`{cyan create-nuxt-app v${version}}`)
+    console.log(chalk`✨  Generating Nuxt.js project in {cyan ${outDir}}`)
+
+    // See https://saojs.org/api.html#standalone-cli
+    sao({ generator, outDir, logLevel: 2 })
+      .run()
+      .catch((err) => {
+        console.trace(err)
+        process.exit(1)
+      })
   })
+
+cli.help()
+
+cli.version(version)
+
+cli.parse()

package.json

@@ -19,6 +19,7 @@
     "release": "standard-version"
   },
   "dependencies": {
+    "cac": "^6.5.2",
     "chalk": "^2.4.2",
     "cross-spawn": "^6.0.5",
     "glob": "^7.1.3",

yarn.lock

@@ -750,6 +750,11 @@ cac@^6.3.8:
   resolved "https://registry.yarnpkg.com/cac/-/cac-6.4.2.tgz#6b2a2ab12619b778b3acc19f97e5298761d9c3de"
   integrity sha512-HM7kl/Izk6pb2HD7z66LVNU52j0xWpBXg8J2MLnOdRMUo2wsrcxu3yRnubnDe/cT0btDzSOl3FPhze09uaT1Vw==
 
+cac@^6.5.2:
+  version "6.5.2"
+  resolved "https://registry.npmjs.org/cac/-/cac-6.5.2.tgz#92ef1490b9ffde5f0be7eeadec5ea926f0e78ef6"
+  integrity sha512-8JdiD9/ZLsG418j/chyZQ3VWuhFELSGlH4EUxzNKgIH8wK8dO0j5Pqu6Pk7B/RP3kX9aasyQhPrrUjYO5e0w7w==
+
 cache-base@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/cache-base/-/cache-base-1.0.1.tgz#0a7f46416831c8b662ee36fe4e7c59d76f666ab2"