onBuildError option takes script to execute when there is an error during compilation

README.md

@@ -76,6 +76,7 @@ Once the build finishes, a child process is spawned firing both a python and nod
 * `onBuildStart`: array of scripts to execute on the initial build. **Default: [ ]**
 * `onBuildEnd`: array of scripts to execute after files are emitted at the end of the compilation. **Default: [ ]**
 * `onBuildExit`: array of scripts to execute after webpack's process is complete. *Note: this event also fires in `webpack --watch` when webpack has finished updating the bundle.* **Default: [ ]**
+* `onBuildError`: array of scripts to execute when there is an error during compilation. **Default: [ ]**
 * `dev`: switch for development environments. This causes scripts to execute once. Useful for running HMR on webpack-dev-server or webpack watch mode. **Default: true**
 * `safe`: switches script execution process from spawn to exec. If running into problems with spawn, turn this setting on. **Default: false**
 * `verbose`: **DEPRECATED** enable for verbose output. **Default: false**

lib/index.js

@@ -149,6 +149,7 @@ var defaultOptions = {
   onBuildStart: [],
   onBuildEnd: [],
   onBuildExit: [],
+  onBuildError: [],
   dev: true,
   verbose: false,
   safe: false
@@ -216,6 +217,9 @@ var WebpackShellPlugin = function () {
       if (typeof options.onBuildExit === 'string') {
         options.onBuildExit = options.onBuildExit.split('&&');
       }
+      if (typeof options.onBuildError === 'string') {
+        options.onBuildError = options.onBuildError.split('&&');
+      }
       return options;
     }
   }, {
@@ -262,11 +266,16 @@ var WebpackShellPlugin = function () {
         callback();
       });
 
-      compiler.plugin('done', function () {
+      compiler.plugin('done', function (stats) {
+        if (stats.hasErrors() && _this.options.onBuildError.length) {
+          for (var i = 0; i < _this.options.onBuildError.length; i++) {
+            _this.handleScript(_this.options.onBuildError[i]);
+          }
+        }
         if (_this.options.onBuildExit.length) {
           console.log('Executing additional scripts before exit');
-          for (var i = 0; i < _this.options.onBuildExit.length; i++) {
-            _this.handleScript(_this.options.onBuildExit[i]);
+          for (var _i = 0; _i < _this.options.onBuildExit.length; _i++) {
+            _this.handleScript(_this.options.onBuildExit[_i]);
           }
         }
       });
@@ -275,4 +284,4 @@ var WebpackShellPlugin = function () {
   return WebpackShellPlugin;
 }();
 
-module.exports = WebpackShellPlugin;
+module.exports = WebpackShellPlugin;

src/webpack-shell-plugin.js

@@ -6,6 +6,7 @@ const defaultOptions = {
   onBuildStart: [],
   onBuildEnd: [],
   onBuildExit: [],
+  onBuildError: [],
   dev: true,
   verbose: false,
   safe: false
@@ -56,6 +57,9 @@ export default class WebpackShellPlugin {
     if (typeof options.onBuildExit === 'string') {
       options.onBuildExit = options.onBuildExit.split('&&');
     }
+    if (typeof options.onBuildError === 'string') {
+      options.onBuildError = options.onBuildError.split('&&');
+    }
     return options;
   }
 
@@ -99,7 +103,12 @@ export default class WebpackShellPlugin {
       callback();
     });
 
-    compiler.plugin('done', () => {
+    compiler.plugin('done', (stats) => {
+      if (stats.hasErrors() && this.options.onBuildError.length) {
+        for (let i = 0; i < this.options.onBuildError.length; i++) {
+          this.handleScript(this.options.onBuildError[i]);
+        }
+      }
       if (this.options.onBuildExit.length) {
         console.log('Executing additional scripts before exit');
         for (let i = 0; i < this.options.onBuildExit.length; i++) {

test/style.css

@@ -1,4 +1,6 @@
 body {
     background: slategrey;
     color: blueviolet;
-}
+}
+
+cause-webpack-error

webpack.config.js

@@ -14,12 +14,19 @@ module.exports = {
     contentBase: path.resolve(__dirname, 'test')
   },*/
   module: {
-    loaders: [
-      { test: /\.css$/, loader: 'style!css' }
-    ]
+    loaders: [{
+      test: /\.css$/,
+      loader: 'style!css'
+    }]
   },
   plugins: [
-    new WebpackShellPlugin({onBuildStart:['node test.js'], onBuildEnd:['echo "Webpack End"'], safe: true, verbose: true}),
+    new WebpackShellPlugin({
+      onBuildStart: ['node test.js'],
+      onBuildEnd: ['echo "Webpack End"'],
+      onBuildError: ['echo "Webpack ERROR"'],
+      safe: true,
+      verbose: true
+    }),
     new webpack.HotModuleReplacementPlugin()
   ]
 };