add new flag to opt out of default babelrc loading

.gitignore

@@ -1,2 +1,3 @@
 node_modules/
+.vscode/
 *.swp

bin/cmd.js

@@ -15,9 +15,18 @@ var serve = require("../lib/serve");
 
 program.version(pkg.version);
 
+const stringBooleanToBoolean = val => {
+  if (typeof val !== 'string' && (val !== 'true' || val !== 'false')) {
+    throw Error(`Incorrect string value: ${val}`);
+  }
+
+  return val === 'true';
+};
+
 program
   .option("-c --config <webpack-config>", "additional webpack configuration")
   .option("-p --port <port>", "port to serve from (default: 9000)")
+  .option("-b --babelrc <no-babelrc>", "use .babelrc in root (default: true)", stringBooleanToBoolean)
   .option(
     "-t --timeout <timeout>",
     "function invocation timeout in seconds (default: 10)"
@@ -57,8 +66,10 @@ program
   .description("build functions")
   .action(function(cmd, options) {
     console.log("netlify-lambda: Building functions");
+
+    const { config: userWebpackConfig, babelrc: useBabelrc = true} = program;
     build
-      .run(cmd, program.config)
+      .run(cmd, { userWebpackConfig, useBabelrc})
       .then(function(stats) {
         console.log(stats.toString({ color: true }));
       })

lib/build.js

@@ -31,7 +31,7 @@ function haveBabelrc(functionsDir) {
   );
 }
 
-function webpackConfig(dir, additionalConfig) {
+function webpackConfig(dir, {userWebpackConfig, useBabelrc}) {
   var config = conf.load();
   var envConfig = conf.loadContext(config).environment;
   var babelOpts = { cacheDirectory: true };
@@ -88,7 +88,7 @@ function webpackConfig(dir, additionalConfig) {
           ),
           use: {
             loader: require.resolve('babel-loader'),
-            options: babelOpts
+            options: {...babelOpts, babelrc: useBabelrc}
           }
         }
       ]
@@ -129,8 +129,8 @@ function webpackConfig(dir, additionalConfig) {
       `
     );
   }
-  if (additionalConfig) {
-    var webpackAdditional = require(path.join(process.cwd(), additionalConfig));
+  if (userWebpackConfig) {
+    var webpackAdditional = require(path.join(process.cwd(), userWebpackConfig));
 
     return merge.smart(webpackConfig, webpackAdditional);
   }