Add support for custom babel config

glennreyes · glennreyes · commit c1077af6de16 · 2018-10-17T00:13:55.000+02:00
diff --git a/README.md b/README.md
@@ -249,6 +249,23 @@ module.exports = {
 };
 ```
 
+### Customize Babel configuration
+
+Add an optional `babel.config.js` to your project root with the following preset
+
+```js
+// babel.config.js
+module.exports = api => {
+  // Cache the returned value forever and don't call this function again
+  api.cache(true);
+
+  return {
+    presets: ['graphpack/babel'],
+    // ... Add your plugins and custom config
+  };
+};
+```
+
 > Note that this file is not going through babel transformation.
 
 ## Acknowledgements
diff --git a/packages/graphpack/config/webpack.config.js b/packages/graphpack/config/webpack.config.js
@@ -1,14 +1,20 @@
 const FriendlyErrorsWebpackPlugin = require('friendly-errors-webpack-plugin');
+const fs = require('fs');
 const path = require('path');
 const webpack = require('webpack');
 const nodeExternals = require('webpack-node-externals');
 
 const IS_DEV = process.env.NODE_ENV !== 'production';
+const hasBabelRc = fs.existsSync(path.resolve('babel.config.js'));
+
+if (hasBabelRc) {
+  console.info('🐠 Using .babelrc defined in your app root');
+}
 
 module.exports = {
   devtool: 'sourcemap',
   entry: {
-    // We take care of setting up entry file under lib/server.js
+    // We take care of setting up entry file under lib/index.js
     index: ['graphpack'],
   },
   // When bundling with Webpack for the backend you usually don't want to bundle
@@ -30,7 +36,9 @@ module.exports = {
             options: {
               babelrc: true,
               cacheDirectory: true,
-              presets: [require.resolve('babel-preset-graphpack')],
+              presets: hasBabelRc
+                ? undefined
+                : [require.resolve('babel-preset-graphpack')],
             },
           },
         ],
diff --git a/packages/graphpack/lib/babel.js b/packages/graphpack/lib/babel.js
@@ -0,0 +1 @@
+module.exports = require('babel-preset-graphpack');

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+module.exports = require('babel-preset-graphpack');`