First cut, using webpack to build react-tools.js

Author: alandipert

.gitignore

@@ -5,4 +5,5 @@
 inst/doc
 node_modules
 reactR.Rcheck
-reactR_*.tar.gz
+reactR_*.tar.gz
+*.swp

inst/www/react-tools/react-tools.js

@@ -1,3 +1,5 @@
+const webpackConfig = require('./webpack.config.js');
+
 module.exports = function (config) {
     config.set({
         frameworks: ['mocha', 'chai', 'source-map-support'],
@@ -7,18 +9,7 @@ module.exports = function (config) {
             'js-tests/*.jsx': ['webpack']
         },
         webpack: {
-            module: {
-                rules: [
-                    {
-                        test: [/\.js$/, /\.jsx$/],
-                        loader: 'babel-loader',
-                        options: {
-                            presets: ['@babel/preset-env', '@babel/preset-react']
-                        }
-                    }
-                ]
-            },
-            devtool: 'inline-source-map'
+          module: webpackConfig.module
         },
         webpackMiddleware: {
             stats: 'errors-only'
@@ -32,4 +23,4 @@ module.exports = function (config) {
         // singleRun: false, // Karma captures browsers, runs the tests and exits
         concurrency: Infinity
     })
-} 
+} 

inst/www/react-tools/react-tools.js.map

@@ -5,20 +5,21 @@
         "karma-chai": "^0.1.0",
         "karma-chrome-launcher": "^2.2.0",
         "karma-mocha": "^1.3.0",
-        "karma-webpack": "^3.0.5",
+        "karma-webpack": "^4.0.0-rc.6",
         "karma-source-map-support": "^1.3.0",
         "mocha": "^5.2.0",
         "react": "^16.7.0",
         "react-dom": "^16.7.0",
-        "webpack": "^3.0.0",
-        "@babel/core": "^7.2.0",
-        "babel-loader": "^8.0.4",
-        "@babel/preset-env": "^7.2.0",
+        "webpack": "^4.27.1",
+        "webpack-cli": "^3.1.2",
+        "@babel/core": "^7.2.2",
+        "babel-loader": "^8.0.5",
+        "@babel/preset-env": "^7.3.1",
         "@babel/preset-react": "^7.0.0",
         "@rgrove/parse-xml": "^1.1.1",
         "react-html-parser": "^2.0.2"
     },
     "scripts": {
         "test": "karma start --single-run --browsers ChromeHeadless karma.conf.js"
     }
-}
+}