Add sync option: resolve #48

Author: ruslux

lib/index.js

@@ -151,7 +151,8 @@ var defaultOptions = {
   onBuildExit: [],
   dev: true,
   verbose: false,
-  safe: false
+  safe: false,
+  sync: false
 };
 
 var WebpackShellPlugin = function () {
@@ -192,17 +193,42 @@ var WebpackShellPlugin = function () {
     }
   }, {
     key: 'handleScript',
-    value: function handleScript(script) {
+    value: function handleScript(script, next) {
+      var proc = null;
       if (os.platform() === 'win32' || this.options.safe) {
-        this.spreadStdoutAndStdErr(exec(script, this.puts));
+        proc = exec(script, this.puts);
+        this.spreadStdoutAndStdErr(proc);
       } else {
         var _serializeScript = this.serializeScript(script),
             command = _serializeScript.command,
             args = _serializeScript.args;
 
-        var proc = spawn(command, args, { stdio: 'inherit' });
+        proc = spawn(command, args, { stdio: 'inherit' });
         proc.on('close', this.puts);
       }
+
+      if (this.options.sync) {
+        proc.on('close', next);
+      } else {
+        next();
+      }
+    }
+  }, {
+    key: 'handleScriptsOn',
+    value: function handleScriptsOn(data) {
+      var _this = this;
+
+      var next = function next(inbound) {
+        if (inbound.length > 0) {
+          var head = inbound[0];
+          var tail = inbound.slice(1);
+
+          _this.handleScript(head, function () {
+            next(tail);
+          });
+        }
+      };
+      next(data);
     }
   }, {
     key: 'validateInput',
@@ -231,42 +257,38 @@ var WebpackShellPlugin = function () {
   }, {
     key: 'apply',
     value: function apply(compiler) {
-      var _this = this;
+      var _this2 = this;
 
       compiler.plugin('compilation', function (compilation) {
-        if (_this.options.verbose) {
+        if (_this2.options.verbose) {
           console.log('Report compilation: ' + compilation);
           console.warn('WebpackShellPlugin [' + new Date() + ']: Verbose is being deprecated, please remove.');
         }
-        if (_this.options.onBuildStart.length) {
+        if (_this2.options.onBuildStart.length) {
           console.log('Executing pre-build scripts');
-          for (var i = 0; i < _this.options.onBuildStart.length; i++) {
-            _this.handleScript(_this.options.onBuildStart[i]);
-          }
-          if (_this.options.dev) {
-            _this.options.onBuildStart = [];
+          _this2.handleScriptsOn(_this2.options.onBuildStart);
+          if (_this2.options.dev) {
+            _this2.options.onBuildStart = [];
           }
         }
       });
 
       compiler.plugin('after-emit', function (compilation, callback) {
-        if (_this.options.onBuildEnd.length) {
+        if (_this2.options.onBuildEnd.length) {
           console.log('Executing post-build scripts');
-          for (var i = 0; i < _this.options.onBuildEnd.length; i++) {
-            _this.handleScript(_this.options.onBuildEnd[i]);
-          }
-          if (_this.options.dev) {
-            _this.options.onBuildEnd = [];
+          _this2.handleScriptsOn(_this2.options.onBuildEnd);
+          if (_this2.options.dev) {
+            _this2.options.onBuildEnd = [];
           }
         }
         callback();
       });
 
       compiler.plugin('done', function () {
-        if (_this.options.onBuildExit.length) {
+        if (_this2.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 < _this2.options.onBuildExit.length; i++) {
+            _this2.handleScript(_this2.options.onBuildExit[i]);
           }
         }
       });

src/webpack-shell-plugin.js

@@ -8,7 +8,8 @@ const defaultOptions = {
   onBuildExit: [],
   dev: true,
   verbose: false,
-  safe: false
+  safe: false,
+  sync: false
 };
 
 export default class WebpackShellPlugin {
@@ -36,14 +37,34 @@ export default class WebpackShellPlugin {
     return {command, args};
   }
 
-  handleScript(script) {
+  handleScript(script, next) {
+    let proc = null;
     if (os.platform() === 'win32' || this.options.safe) {
-      this.spreadStdoutAndStdErr(exec(script, this.puts));
+      proc = exec(script, this.puts);
+      this.spreadStdoutAndStdErr(proc);
     } else {
       const {command, args} = this.serializeScript(script);
-      const proc = spawn(command, args, {stdio: 'inherit'});
+      proc = spawn(command, args, {stdio: 'inherit'});
       proc.on('close', this.puts);
     }
+
+    if (this.options.sync) {
+      proc.on('close', next);
+    } else {
+      next()
+    }
+  }
+
+  handleScriptsOn(data) {
+    let next = (inbound) => {
+      if (inbound.length > 0) {
+        let head = inbound[0];
+        let tail = inbound.slice(1);
+
+        this.handleScript(head, () => {next(tail)});
+      }
+    };
+    next(data)
   }
 
   validateInput(options) {
@@ -77,9 +98,7 @@ export default class WebpackShellPlugin {
       }
       if (this.options.onBuildStart.length) {
         console.log('Executing pre-build scripts');
-        for (let i = 0; i < this.options.onBuildStart.length; i++) {
-          this.handleScript(this.options.onBuildStart[i]);
-        }
+        this.handleScriptsOn(this.options.onBuildStart);
         if (this.options.dev) {
           this.options.onBuildStart = [];
         }
@@ -89,9 +108,7 @@ export default class WebpackShellPlugin {
     compiler.plugin('after-emit', (compilation, callback) => {
       if (this.options.onBuildEnd.length) {
         console.log('Executing post-build scripts');
-        for (let i = 0; i < this.options.onBuildEnd.length; i++) {
-          this.handleScript(this.options.onBuildEnd[i]);
-        }
+        this.handleScriptsOn(this.options.onBuildEnd);
         if (this.options.dev) {
           this.options.onBuildEnd = [];
         }

webpack.config.js

@@ -19,7 +19,7 @@ module.exports = {
     ]
   },
   plugins: [
-    new WebpackShellPlugin({onBuildStart:['node test.js'], onBuildEnd:['echo "Webpack End"'], safe: true, verbose: true}),
+    new WebpackShellPlugin({onBuildStart:['node test.js', 'echo "end node.test"'], onBuildEnd:['echo "Webpack End"'], safe: true, verbose: true, sync: true}),
     new webpack.HotModuleReplacementPlugin()
   ]
 };