feat(ng): add warning when angular-cli is detected locally

packages/@angular/cli/bin/ng

@@ -86,6 +86,34 @@ if (require('../package.json')['name'] == 'angular-cli'
   `));
 }
 
+const packageJsonProject = require(path.join(process.cwd(), 'package.json'));
+const hasOldDep = Boolean(packageJsonProject.dependencies['angular-cli']);
+const hasOldDevDep = Boolean(packageJsonProject.devDependencies['angular-cli']);
+const hasDevDep = Boolean(packageJsonProject.devDependencies['@angular/cli']);
+
+if (hasOldDep || hasOldDevDep || !hasDevDep) {
+  const warnings = [
+    'The package "angular-cli" has been renamed to "@angular/cli". The old package will be deprecated soon.',
+    'Please take the following steps to avoid issues:'
+  ];
+
+  if (hasOldDep) {
+    warnings.push('"npm uninstall --save angular-cli"');
+  }
+
+  if (hasOldDevDep) {
+    warnings.push('"npm uninstall --save-dev angular-cli"');
+  }
+
+  if (!hasDevDep) {
+    warnings.push(
+      '"npm install --save-dev @angular/cli@latest"',
+      ''
+    )
+  }
+
+  process.stderr.write(yellow(warnings.join('\n\n')));
+}
 
 resolve('@angular/cli', { basedir: process.cwd() },
   function (error, projectLocalCli) {