fix: display custom schematics in help

actions/generate.action.ts

@@ -102,7 +102,11 @@ const generateFiles = async (inputs: Input[]) => {
         specValue,
         specOptions.passedAsInput,
       );
-      generateFlat = shouldGenerateFlat(configuration, answers.appNames, flatValue);
+      generateFlat = shouldGenerateFlat(
+        configuration,
+        answers.appNames,
+        flatValue,
+      );
     }
   }
 

bin/nest.ts

@@ -7,7 +7,7 @@ import {
   localBinExists,
 } from '../lib/utils/local-binaries';
 
-const bootstrap = () => {
+const bootstrap = async () => {
   const program: CommanderStatic = commander;
   program
     .version(
@@ -20,11 +20,11 @@ const bootstrap = () => {
 
   if (localBinExists()) {
     const localCommandLoader = loadLocalBinCommandLoader();
-    localCommandLoader.load(program);
+    await localCommandLoader.load(program);
   } else {
-    CommandLoader.load(program);
+    await CommandLoader.load(program);
   }
-  commander.parse(process.argv);
+  commander.parseAsync(process.argv);
 
   if (!process.argv.slice(2).length) {
     program.outputHelp();

commands/command.loader.ts

@@ -16,13 +16,13 @@ import { InfoCommand } from './info.command';
 import { NewCommand } from './new.command';
 import { StartCommand } from './start.command';
 export class CommandLoader {
-  public static load(program: CommanderStatic): void {
+  public static async load(program: CommanderStatic): Promise<void> {
     new NewCommand(new NewAction()).load(program);
     new BuildCommand(new BuildAction()).load(program);
     new StartCommand(new StartAction()).load(program);
     new InfoCommand(new InfoAction()).load(program);
     new AddCommand(new AddAction()).load(program);
-    new GenerateCommand(new GenerateAction()).load(program);
+    await new GenerateCommand(new GenerateAction()).load(program);
 
     this.handleInvalidCommand(program);
   }

commands/generate.command.ts

@@ -1,16 +1,18 @@
 import * as chalk from 'chalk';
 import * as Table from 'cli-table3';
 import { Command, CommanderStatic } from 'commander';
-import { NestCollection } from '../lib/schematics/nest.collection';
+import { AbstractCollection, CollectionFactory } from '../lib/schematics';
+import { Schematic } from '../lib/schematics/nest.collection';
+import { loadConfiguration } from '../lib/utils/load-configuration';
 import { AbstractCommand } from './abstract.command';
 import { Input } from './command.input';
 
 export class GenerateCommand extends AbstractCommand {
-  public load(program: CommanderStatic) {
+  public async load(program: CommanderStatic): Promise<void> {
     program
       .command('generate <schematic> [name] [path]')
       .alias('g')
-      .description(this.buildDescription())
+      .description(await this.buildDescription())
       .option(
         '-d, --dry-run',
         'Report actions that would be taken without writing out results.',
@@ -93,17 +95,18 @@ export class GenerateCommand extends AbstractCommand {
       );
   }
 
-  private buildDescription(): string {
+  private async buildDescription(): Promise<string> {
+    const collection = await this.getCollection();
     return (
       'Generate a Nest element.\n' +
       `  Schematics available on ${chalk.bold(
-        '@nestjs/schematics',
+        collection,
       )} collection:\n` +
-      this.buildSchematicsListAsTable()
+      this.buildSchematicsListAsTable(await this.getSchematics(collection))
     );
   }
 
-  private buildSchematicsListAsTable(): string {
+  private buildSchematicsListAsTable(schematics: Schematic[]): Promise<string> {
     const leftMargin = '    ';
     const tableConfig = {
       head: ['name', 'alias', 'description'],
@@ -118,7 +121,7 @@ export class GenerateCommand extends AbstractCommand {
       },
     };
     const table: any = new Table(tableConfig);
-    for (const schematic of NestCollection.getSchematics()) {
+    for (const schematic of schematics) {
       table.push([
         chalk.green(schematic.name),
         chalk.cyan(schematic.alias),
@@ -127,4 +130,16 @@ export class GenerateCommand extends AbstractCommand {
     }
     return table.toString();
   }
+
+  private async getCollection(): Promise<string> {
+    const configuration = await loadConfiguration();
+    return configuration.collection;
+  }
+
+  private async getSchematics(collection: string): Promise<Schematic[]> {
+    const abstractCollection: AbstractCollection = CollectionFactory.create(
+      collection,
+    );
+    return abstractCollection.getSchematics();
+  }
 }

lib/schematics/abstract.collection.ts

@@ -1,7 +1,8 @@
 import { AbstractRunner } from '../runners';
+import { Schematic } from './nest.collection';
 import { SchematicOption } from './schematic.option';
 
-export class AbstractCollection {
+export abstract class AbstractCollection {
   constructor(protected collection: string, protected runner: AbstractRunner) {}
 
   public async execute(
@@ -14,6 +15,8 @@ export class AbstractCollection {
     await this.runner.run(command);
   }
 
+  public abstract getSchematics(): Schematic[];
+
   private buildCommandLine(name: string, options: SchematicOption[]): string {
     return `${this.collection}:${name}${this.buildOptions(options)}`;
   }

lib/schematics/custom.collection.ts

@@ -1,3 +1,29 @@
+import { description } from 'commander';
+import { readFileSync } from 'fs';
+import { dirname, join } from 'path';
 import { AbstractCollection } from './abstract.collection';
+import { Schematic } from './nest.collection';
 
-export class CustomCollection extends AbstractCollection {}
+export interface CollectionSchematic {
+  schema: string;
+  description: string;
+  aliases: string[];
+}
+
+export class CustomCollection extends AbstractCollection {
+  public getSchematics(): Schematic[] {
+    const collectionPackagePath = dirname(require.resolve(this.collection));
+    const collectionPath = join(collectionPackagePath, 'collection.json');
+    const collection = JSON.parse(readFileSync(collectionPath, 'utf8'));
+    const schematics = Object.entries(collection.schematics).map(
+      ([name, value]) => {
+        const schematic = value as CollectionSchematic;
+        const description = schematic.description;
+        const alias = schematic?.aliases?.length ? schematic.aliases[0] : '';
+        return { name, description, alias };
+      },
+    );
+
+    return schematics;
+  }
+}

lib/schematics/nest.collection.ts

@@ -121,7 +121,7 @@ export class NestCollection extends AbstractCollection {
     await super.execute(schematic, options);
   }
 
-  public static getSchematics(): Schematic[] {
+  public getSchematics(): Schematic[] {
     return NestCollection.schematics.filter(
       (item) => item.name !== 'angular-app',
     );