fix(@angular-devkit/schematics-cli): inconsistency in referencing collection

Fixes #12600

Author: alan-agius4

packages/angular_devkit/schematics_cli/bin/schematics.ts

@@ -23,11 +23,7 @@ import {
   SchematicEngine,
   UnsuccessfulWorkflowExecution,
 } from '@angular-devkit/schematics';
-import {
-  FileSystemEngineHost,
-  NodeModulesEngineHost,
-  NodeWorkflow,
-} from '@angular-devkit/schematics/tools';
+import { NodeModulesEngineHost, NodeWorkflow } from '@angular-devkit/schematics/tools';
 import * as minimist from 'minimist';
 
 
@@ -90,7 +86,6 @@ export async function main({
 
   /** Create the DevKit Logger used through the CLI. */
   const logger = createConsoleLogger(argv['verbose'], stdout, stderr);
-
   if (argv.help) {
     logger.info(getUsage());
 
@@ -104,16 +99,18 @@ export async function main({
   } = parseSchematicName(argv._.shift() || null);
   const isLocalCollection = collectionName.startsWith('.') || collectionName.startsWith('/');
 
-
   /** If the user wants to list schematics, we simply show all the schematic names. */
   if (argv['list-schematics']) {
-    const engineHost = isLocalCollection
-      ? new FileSystemEngineHost(normalize(process.cwd()))
-      : new NodeModulesEngineHost();
-
-    const engine = new SchematicEngine(engineHost);
-    const collection = engine.createCollection(collectionName);
-    logger.info(engine.listSchematicNames(collection).join('\n'));
+    try {
+      const engineHost = new NodeModulesEngineHost();
+      const engine = new SchematicEngine(engineHost);
+      const collection = engine.createCollection(collectionName);
+      logger.info(engine.listSchematicNames(collection).join('\n'));
+    } catch (error) {
+      logger.fatal(error.message);
+
+      return 1;
+    }
 
     return 0;
   }

tests/legacy-cli/e2e/tests/schematics_cli/basic.ts

@@ -0,0 +1,31 @@
+import * as path from 'path';
+import { getGlobalVariable } from '../../utils/env';
+import { exec, execAndWaitForOutputToMatch, silentNpm } from '../../utils/process';
+
+const packages = require('../../../../../lib/packages').packages;
+
+export default async function () {
+  // setup
+  const argv = getGlobalVariable('argv');
+  if (argv.noglobal) {
+    return;
+  }
+
+  const startCwd = process.cwd();
+  await silentNpm('install', '-g', packages['@angular-devkit/schematics-cli'].tar, '--unsafe-perm');
+  await exec(process.platform.startsWith('win') ? 'where' : 'which', 'schematics');
+
+  // create blank schematic
+  await exec('schematics', 'schematic', '--name', 'test-schematic');
+
+  process.chdir(path.join(startCwd, 'test-schematic'));
+  await execAndWaitForOutputToMatch(
+    'schematics',
+    ['.:', '--list-schematics'],
+    /my-full-schematic/,
+  );
+
+  // restore path
+  process.chdir(startCwd);
+
+}