fix(@angular/cli): add ng eject with a message about the disabling

Fix #10169

packages/@angular/cli/commands/eject.ts

@@ -0,0 +1,22 @@
+import { tags } from '@angular-devkit/core';
+import { Command, Option } from '../models/command';
+
+
+export default class EjectCommand extends Command {
+  public readonly name = 'eject';
+  public readonly description = 'Temporarily disabled. Ejects your app and output the proper '
+                              + 'webpack configuration and scripts.';
+  public readonly arguments: string[] = [];
+  public readonly options: Option[] = [];
+
+  run(_options: any) {
+    this.logger.info(tags.stripIndents`
+      The 'eject' command has been temporarily disabled, as it is not yet compatible with the new
+      angular.json format. The new configuration format provides further flexibility to modify the
+      configuration of your workspace without ejecting. Ejection will be re-enabled in a future
+      release of the CLI.
+
+      If you need to eject today, use CLI 1.7 to eject your project.
+    `);
+  }
+}

packages/@angular/cli/lib/cli/index.ts

@@ -8,26 +8,32 @@ const Project = require('../../ember-cli/lib/models/project');
 
 function loadCommands() {
   return {
+    // Schematics commands.
     'add': require('../../commands/add').default,
-    'build': require('../../commands/build').default,
-    'serve': require('../../commands/serve').default,
     'new': require('../../commands/new').default,
     'generate': require('../../commands/generate').default,
+    'update': require('../../commands/update').default,
+
+    // Architect commands.
+    'build': require('../../commands/build').default,
+    'serve': require('../../commands/serve').default,
     'test': require('../../commands/test').default,
     'e2e': require('../../commands/e2e').default,
-    'help': require('../../commands/help').default,
     'lint': require('../../commands/lint').default,
-    'version': require('../../commands/version').default,
-    'doc': require('../../commands/doc').default,
     'xi18n': require('../../commands/xi18n').default,
-    'update': require('../../commands/update').default,
     'run': require('../../commands/run').default,
 
+    // Disabled commands.
+    'eject': require('../../commands/eject').default,
+
     // Easter eggs.
     'make-this-awesome': require('../../commands/easter-egg').default,
 
-    // Configuration.
+    // Other.
     'config': require('../../commands/config').default,
+    'help': require('../../commands/help').default,
+    'version': require('../../commands/version').default,
+    'doc': require('../../commands/doc').default,
   };
 }