sls invoke local with webpack v3.0.0 throws "module not found"

This is a (Bug Report / Feature Proposal)

Bug report

Description

Installed v3.0.0 to try out invoke local. The previous version works fine on the same repo using sls webpack... I can see that SLS builds with webpack but then throws the error about missing module (see stack trace).

Additional Data

• Serverless-Webpack Version you’re using: 3.0.0
• Webpack version you’re using: 3.5.0
• Serverless Framework Version you’re using: 1.19.0
• Operating System: Windows 10
• Stack Trace (if available):

{ Error: Cannot find module './.webpack/service/handler'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at AwsInvokeLocal.invokeLocalNodeJs (./npm/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:156:33)
    at AwsInvokeLocal.invokeLocal (./npm/node_modules/serverless/lib/plugins/aws/invokeLocal/index.js:114:19)
    at AwsInvokeLocal.tryCatcher (./npm/node_modules/serverless/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (./npm/node_modules/serverless/node_modules/bluebird/js/release/promise.js:512:31)
    at Promise._settlePromise (./npm/node_modules/serverless/node_modules/bluebird/js/release/promise.js:569:18)
    at Promise._settlePromise0 (./npm/node_modules/serverless/node_modules/bluebird/js/release/promise.js:614:10)
    at Promise._settlePromises (./npm/node_modules/serverless/node_modules/bluebird/js/release/promise.js:693:18)
    at Async._drainQueue (./npm/node_modules/serverless/node_modules/bluebird/js/release/async.js:133:16)
    at Async._drainQueues (./npm/node_modules/serverless/node_modules/bluebird/js/release/async.js:143:10)
    at Immediate.Async.drainQueues (./npm/node_modules/serverless/node_modules/bluebird/js/release/async.js:17:14)
    at runCallback (timers.js:637:20)
    at tryOnImmediate (timers.js:610:5)
    at processImmediate [as _immediateCallback] (timers.js:582:5) code: 'MODULE_NOT_FOUND' }

[QAnders]

Thanks! Changing the entry works fine!

[HyperBrain]

Can you try to use automatic entry resolution, so that the plugin tries to determine the handler? Please change the webpack.conf.js as follows:

const slsw = require('serverless-webpack');
module.exports = {
  ...
  entry: slsw.lib.entries,
  ...
};

Additionally you should use Webpack 2.x.x or Webpack 3.x.x (as a dev dependency of your project). You have to use module.rules instead of modules.loaders for the newer webpack versions (the sample below also uses babel-preset-node6). Webpack 1.x.x might not work very well.

...
	module: {
		rules: [
			{
				// Process ES6 with Babel.
				test: /\.js$/,
				use: [
					{
						loader: "babel-loader",
						options: {
							presets: [ "node6" ],
							plugins: []
						}
					}
				],
			}
		]
	}
...