Read aliases from `alias` property in `now.json`

lib/re-alias.js

@@ -36,15 +36,41 @@ exports.reAlias = async (token, host, help, exit) => {
     quiet: true // `quiet`
   })
 
-  const targets = nowConfig && nowConfig.aliases
+  if (!nowConfig) {
+    help()
+    return exit(0)
+  }
+
+  let pointers = []
+
+  if (nowConfig.alias) {
+    const value = nowConfig.alias
+
+    if (typeof value === 'string') {
+      pointers.push(value)
+    }
+
+    if (Array.isArray(value)) {
+      pointers = pointers.concat(nowConfig.alias)
+    }
+
+    error(`Property ${chalk.grey('aliases')} is not a valid array or string`)
+  }
+
+  if (nowConfig.aliases && Array.isArray(nowConfig.aliases)) {
+    console.log(`${chalk.red('Deprecated!')} The property ${chalk.grey('aliases')} will be ` +
+    `removed from the config file soon.`)
+    console.log('Read more about the new way here: http://bit.ly/2l2v5Fg\n')
+
+    pointers = pointers.concat(nowConfig.aliases)
+  }
 
-  // the user never intended to support aliases from the package
-  if (!targets || !Array.isArray(targets)) {
+  if (pointers.length === 0) {
     help()
     return exit(0)
   }
 
-  for (const target of targets) {
-    await exports.assignAlias(target, token, host)
+  for (const pointer of pointers) {
+    await exports.assignAlias(pointer, token, host)
   }
 }