fix: minor changes to met the current behavior

- emit error on retrieve inputs with 'undefined' value
- leave 'project' option optional as before
- leave 'collection' optional as before
- allow 'specFileSuffix' to be undefined
- allow 'config' option to be undefined on build command

actions/build.action.ts

@@ -69,7 +69,7 @@ export class BuildAction extends AbstractAction {
     isDebugEnabled = false,
     onSuccess?: () => void,
   ) {
-    const configFileName = commandOptions.get<string>('config', true).value;
+    const configFileName = commandOptions.get<string>('config')?.value;
     const configuration = await this.loader.load(configFileName);
     const appName = commandInputs.get<string>('app', true).value;
 
@@ -178,7 +178,9 @@ export class BuildAction extends AbstractAction {
     watchMode: boolean,
     onSuccess: (() => void) | undefined,
   ) {
-    const { WebpackCompiler } = await import('../lib/compiler/webpack-compiler')
+    const { WebpackCompiler } = await import(
+      '../lib/compiler/webpack-compiler'
+    );
     const webpackCompiler = new WebpackCompiler(this.pluginsLoader);
 
     const webpackPath =

actions/generate.action.ts

@@ -29,12 +29,12 @@ export class GenerateAction extends AbstractAction {
 const generateFiles = async (storage: CommandStorage) => {
   const configuration = await loadConfiguration();
 
-  const collectionOption = storage.get<string>('collection', true).value;
+  const collectionOption = storage.get<Collection>('collection')?.value;
   const schematic = storage.get<string>('schematic', true).value;
-  const appName = storage.get<string>('project', true).value;
+  const appName = storage.get<string>('project')?.value;
   const spec = storage.get<boolean>('spec', true);
-  const flat = storage.get<boolean>('flat', true);
-  const specFileSuffix = storage.get<string>('specFileSuffix', true);
+  const flat = storage.get<boolean>('flat');
+  const specFileSuffix = storage.get<string>('specFileSuffix');
 
   const collection: AbstractCollection = CollectionFactory.create(
     collectionOption || configuration.collection || Collection.NESTJS,
@@ -51,7 +51,7 @@ const generateFiles = async (storage: CommandStorage) => {
 
   const specValue = spec.value;
   const flatValue = !!flat?.value;
-  const specFileSuffixValue = specFileSuffix.value;
+  const specFileSuffixValue = specFileSuffix?.value;
   const specOptions = spec.options;
   let generateSpec = shouldGenerateSpec(
     configuration,

commands/command-storage.ts

@@ -52,7 +52,7 @@ export class CommandStorage {
       | CommandStorageEntry<TValue>
       | undefined;
     if (errorOnMissing) {
-      if (!input) {
+      if (!input || input.value === undefined) {
         throw new Error(`The input ${inputName} is missing!`);
       }
     }

lib/utils/project-utils.ts

@@ -21,7 +21,7 @@ export function shouldAskForProject(
 export function shouldGenerateSpec(
   configuration: Required<Configuration>,
   schematic: string,
-  appName: string,
+  appName: string | undefined,
   specValue: boolean,
   specPassedAsInput?: boolean,
 ) {
@@ -70,7 +70,7 @@ export function shouldGenerateSpec(
 
 export function shouldGenerateFlat(
   configuration: Required<Configuration>,
-  appName: string,
+  appName: string | undefined,
   flatValue: boolean,
 ): boolean {
   // CLI parameters have the highest priority
@@ -91,8 +91,8 @@ export function shouldGenerateFlat(
 
 export function getSpecFileSuffix(
   configuration: Required<Configuration>,
-  appName: string,
-  specFileSuffixValue: string,
+  appName: string | undefined,
+  specFileSuffixValue: string | undefined,
 ): string {
   // CLI parameters have the highest priority
   if (specFileSuffixValue) {
@@ -110,7 +110,7 @@ export function getSpecFileSuffix(
   if (typeof specFileSuffixConfiguration === 'string') {
     return specFileSuffixConfiguration;
   }
-  return specFileSuffixValue;
+  throw new Error('No spec file suffix was defined!');
 }
 
 export async function askForProjectName(