fix: do not ignoring webpack config loading errors

Author: micalevisk

Diff for: actions/build.action.ts

@@ -22,6 +22,7 @@ import {
 } from '../lib/configuration/defaults';
 import { FileSystemReader } from '../lib/readers';
 import { ERROR_PREFIX } from '../lib/ui';
+import { isModuleAvailable } from '../lib/utils/is-module-available';
 import { AbstractAction } from './abstract.action';
 import webpack = require('webpack');
 
@@ -261,13 +262,15 @@ export class BuildAction extends AbstractAction {
     webpackRef: typeof webpack,
   ) => webpack.Configuration {
     const pathToWebpackFile = join(process.cwd(), webpackPath);
+    const isWebpackFileAvailable = isModuleAvailable(pathToWebpackFile);
+    if (!isWebpackFileAvailable && webpackPath === defaultPath) {
+      return ({}) => ({});
+    }
+
     try {
       return require(pathToWebpackFile);
     } catch (err) {
-      if (webpackPath !== defaultPath) {
-        throw err;
-      }
-      return ({}) => ({});
+      throw err;
     }
   }
 }

Diff for: lib/utils/is-module-available.ts

@@ -0,0 +1,8 @@
+export function isModuleAvailable(path: string): boolean {
+  try {
+    require.resolve(path);
+    return true;
+  } catch {
+    return false;
+  }
+}