Wait until apply to create inspectpack daemon

[tschaub]

This makes it so the dashboard plugin can be configured without creating the inspectpack daemon. If the daemon is created in the constructor, the plugin cannot be conditionally applied. Currently, if the plugin is configured and added as part of a development only config, the process running the production config will never exit. With the changes here, the plugin can be configured but if it is never applied, the webpack process exits properly.

Fixes #96.
Fixes #125.

[tschaub]

For people running into the "webpack never exits if the dashboard plugin is configured" issue, a workaround is to lazily construct the plugin.

For example, in your webpack dev config, instead of creating the plugin and adding it to your plugins array, you can add an object with an apply function that lazily constructs the plugin like this:

// webpack.config.js
const DashboardPlugin = require('webpack-dashboard/plugin');

const devConfig = {
  // rest of config as usual...
  plugins: [
    {
      apply: function() {
        const dashboard = new DashboardPlugin({color: 'cyan'});
        dashboard.apply.apply(dashboard, arguments);
      }
    }
  ]
};

[ryan-roemer]

Approach looks good in general.

Can you also stick a null check / guard in cleanup() in the weird case that this.inspectpack is unset?

@tptee -- can you take a look at this one?

[tptee]

👍

[tschaub]

@ryan-roemer I pushed a new commit so cleanup() guards against no this.inspectpack.

[ryan-roemer]

Looks good!

[ryan-roemer]

Released in webpack-dashboard@1.0.1. Thanks @tschaub !!!