Add prototype for custom configuration

bin/cli.js

@@ -27,6 +27,8 @@ const cli = meow(`
 
     -o --open     Open dev server in default browser
 
+    -c --config   Pass a custom weback config to merge with the default config
+
     --proxy       Proxy requests to another server (only for dev)
 
     --proxy-path  Path to proxy, default: /api
@@ -37,6 +39,7 @@ const cli = meow(`
     s: 'static',
     p: 'port',
     o: 'open',
+    c: 'config',
     h: 'help',
     v: 'version',
   }

lib/dev/index.js

@@ -17,6 +17,7 @@ require('babel-register')({
 const path = require('path')
 const webpack = require('webpack')
 const DevServer = require('webpack-dev-server')
+const merge = require('webpack-merge')
 const config = require('./config')
 
 const devOptions = {
@@ -91,5 +92,14 @@ module.exports = (filename, options = {}) => {
     'webpack/hot/only-dev-server'
   )
 
-  return start(filename, options, config)
+  let mergedConfig = config
+
+  if (options.config) {
+    const userConfig = require(
+      path.join(process.cwd(), options.config)
+    )
+    mergedConfig = merge(config, userConfig)
+  }
+
+  return start(filename, options, mergedConfig)
 }

lib/static/client.js

@@ -2,6 +2,7 @@ const path = require('path')
 const webpack = require('webpack')
 const MinifyPlugin = require('babel-minify-webpack-plugin')
 const { ReactLoadablePlugin } = require('react-loadable/webpack')
+const merge = require('webpack-merge')
 
 const config = {
   // mode: 'production',
@@ -85,7 +86,15 @@ module.exports = (filename, options = {}) => {
     })
   )
 
-  const compiler = webpack(config)
+  let mergedConfig = config
+  if (options.config) {
+    const userConfig = require(
+      path.join(process.cwd(), options.config)
+    )
+    mergedConfig = merge(config, userConfig)
+  }
+
+  const compiler = webpack(mergedConfig)
 
   return new Promise((resolve, reject) => {
     compiler.run((err, stats) => {

package.json

@@ -43,7 +43,8 @@
     "read-pkg-up": "^2.0.0",
     "update-notifier": "^2.2.0",
     "webpack": "^3.10.0",
-    "webpack-dev-server": "^2.9.1"
+    "webpack-dev-server": "^2.9.1",
+    "webpack-merge": "^4.1.1"
   },
   "devDependencies": {
     "ava": "^0.24.0",