fix(@angular/cli): allow for schema-less schematics to be generated

Author: hansl

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

@@ -112,8 +112,12 @@ export default Command.extend({
       .then((availableOptions: SchematicAvailableOptions[]) => {
         let anonymousOptions: string[] = [];
 
-        const nameOption = availableOptions.filter(opt => opt.name === 'name')[0];
-        if (nameOption) {
+        if (availableOptions) {
+          const nameOption = availableOptions.filter(opt => opt.name === 'name')[0];
+          if (nameOption) {
+            anonymousOptions = [...anonymousOptions, '<name>'];
+          }
+        } else {
           anonymousOptions = [...anonymousOptions, '<name>'];
         }
 
@@ -123,7 +127,7 @@ export default Command.extend({
 
         this.registerOptions({
           anonymousOptions: anonymousOptions,
-          availableOptions: availableOptions
+          availableOptions: availableOptions || []
         });
       });
   },

packages/@angular/cli/tasks/schematic-get-help-output.ts

@@ -1,7 +1,7 @@
 import chalk from 'chalk';
 const Task = require('../ember-cli/lib/models/task');
 
-const { cyan, grey } = chalk;
+const { cyan, green, grey } = chalk;
 
 export interface SchematicGetHelpOptions {
   collectionName: string;
@@ -40,7 +40,7 @@ export default Task.extend({
     }), nonSchematicOptions])
     .then(([availableOptions, nonSchematicOptions]: [SchematicAvailableOptions[], any[]]) => {
       const output: string[] = [];
-      [...(nonSchematicOptions || []), ...availableOptions]
+      [...(nonSchematicOptions || []), ...availableOptions || []]
         .filter(opt => hiddenOptions.indexOf(opt.name) === -1)
         .forEach(opt => {
           let text = cyan(`    --${opt.name}`);
@@ -63,6 +63,11 @@ export default Task.extend({
             output.push(grey(`      aliases: ${aliasText}`));
           }
         });
+      if (availableOptions === null) {
+        output.push(green('This schematic accept additional options, but did not provide '
+                        + 'documentation.'));
+      }
+
       return output;
     });
   }

packages/@angular/cli/tasks/schematic-get-options.ts

@@ -18,14 +18,18 @@ export interface SchematicAvailableOptions {
 }
 
 export default Task.extend({
-  run: function (options: SchematicGetOptions): Promise<SchematicAvailableOptions[]> {
+  run: function (options: SchematicGetOptions): Promise<SchematicAvailableOptions[] | null> {
     const collectionName = options.collectionName ||
       CliConfig.getValue('defaults.schematics.collection');
 
     const collection = getCollection(collectionName);
 
     const schematic = getSchematic(collection, options.schematicName);
 
+    if (!schematic.description.schemaJson) {
+      return Promise.resolve(null);
+    }
+
     const properties = schematic.description.schemaJson.properties;
     const keys = Object.keys(properties);
     const availableOptions = keys

packages/@angular/cli/tasks/schematic-run.ts

@@ -168,8 +168,10 @@ export default Task.extend({
 });
 
 function prepOptions(schematic: Schematic<{}, {}>, options: SchematicOptions): SchematicOptions {
+  const properties = (<any>schematic.description).schemaJson
+    ? (<any>schematic.description).schemaJson.properties
+    : options;
 
-  const properties = (<any>schematic.description).schemaJson.properties;
   const keys = Object.keys(properties);
   if (['component', 'c', 'directive', 'd'].indexOf(schematic.description.name) !== -1) {
     options.prefix = (options.prefix === 'false' || options.prefix === '')