Build refactor to webpack (#2139)

* Move to webpack build
* Use webpack for building openmct.  Move SCSS to one folder and load
all core css up front.  Remove bower, begin removing gulp in favor
of npm run.
* Uses eslint instead of jshint and jscs.  Merge style checking rules
into .eshintrc.js, carrying over core parts of crockford style and
our adaptations.  Current code base fails to pass the linter, want
to separate linter changes from fixes to linting rules.
* Support for Vue SFC with example
* Remove outdated examples
* Use HTML loader for html (supports relative imports of resources e.g.
images) and raw-loader for when javascript must be loaded as text.

app.js

@@ -7,79 +7,57 @@
  * node app.js [options]
  */
 
-(function () {
-    "use strict";
 
-    var BUNDLE_FILE = 'bundles.json',
-        options = require('minimist')(process.argv.slice(2)),
-        express = require('express'),
-        app = express(),
-        fs = require('fs'),
-        request = require('request');
+const options = require('minimist')(process.argv.slice(2));
+const express = require('express');
+const app = express();
+const fs = require('fs');
+const request = require('request');
 
-    // Defaults
-    options.port = options.port || options.p || 8080;
-    options.host = options.host || options.h || 'localhost'
-    options.directory = options.directory || options.D || '.';
-    ['include', 'exclude', 'i', 'x'].forEach(function (opt) {
-        options[opt] = options[opt] || [];
-        // Make sure includes/excludes always end up as arrays
-        options[opt] = Array.isArray(options[opt]) ?
-                options[opt] : [options[opt]];
-    });
-    options.include = options.include.concat(options.i);
-    options.exclude = options.exclude.concat(options.x);
+// Defaults
+options.port = options.port || options.p || 8080;
+options.host = options.host || options.h || 'localhost'
+options.directory = options.directory || options.D || '.';
 
-    // Show command line options
-    if (options.help || options.h) {
-        console.log("\nUsage: node app.js [options]\n");
-        console.log("Options:");
-        console.log("  --help, -h               Show this message.");
-        console.log("  --port, -p <number>      Specify port.");
-        console.log("  --include, -i <bundle>   Include the specified bundle.");
-        console.log("  --exclude, -x <bundle>   Exclude the specified bundle.");
-        console.log("  --directory, -D <bundle>   Serve files from specified directory.");
-        console.log("");
-        process.exit(0);
+// Show command line options
+if (options.help || options.h) {
+    console.log("\nUsage: node app.js [options]\n");
+    console.log("Options:");
+    console.log("  --help, -h               Show this message.");
+    console.log("  --port, -p <number>      Specify port.");
+    console.log("  --directory, -D <bundle>   Serve files from specified directory.");
+    console.log("");
+    process.exit(0);
+}
+
+app.disable('x-powered-by');
+
+app.use('/proxyUrl', function proxyRequest(req, res, next) {
+    console.log('Proxying request to: ', req.query.url);
+    req.pipe(request({
+        url: req.query.url,
+        strictSSL: false
+    }).on('error', next)).pipe(res);
+});
+
+const webpack = require('webpack');
+const webpackConfig = require('./webpack.config.js');
+const compiler = webpack(webpackConfig);
+const webpackDevRoute = require('webpack-dev-middleware')(
+    compiler, {
+        publicPath: '/dist',
+        logLevel: 'warn'
     }
+);
 
-    app.disable('x-powered-by');
+app.use(webpackDevRoute);
 
-    // Override bundles.json for HTTP requests
-    app.use('/' + BUNDLE_FILE, function (req, res) {
-        var bundles;
+// Expose index.html for development users.
+app.get('/', function (req, res) {
+    fs.createReadStream('index.html').pipe(res);
+});
 
-        try {
-            bundles = JSON.parse(fs.readFileSync(BUNDLE_FILE, 'utf8'));
-        } catch (e) {
-            bundles = [];
-        }
-
-        // Handle command line inclusions/exclusions
-        bundles = bundles.concat(options.include);
-        bundles = bundles.filter(function (bundle) {
-            return options.exclude.indexOf(bundle) === -1;
-        });
-        bundles = bundles.filter(function (bundle, index) { // Uniquify
-            return bundles.indexOf(bundle) === index;
-        });
-
-        res.send(JSON.stringify(bundles));
-    });
-
-    app.use('/proxyUrl', function proxyRequest(req, res, next) {
-        console.log('Proxying request to: ', req.query.url);
-        req.pipe(request({
-            url: req.query.url,
-            strictSSL: false
-        }).on('error', next)).pipe(res);
-    });
-
-    // Expose everything else as static files
-    app.use(express['static'](options.directory));
-
-    // Finally, open the HTTP server and log the instance to the console
-    app.listen(options.port, options.host, function() {
-        console.log('Open MCT application running at %s:%s', options.host, options.port)
-    });
-}());
+// Finally, open the HTTP server and log the instance to the console
+app.listen(options.port, options.host, function() {
+    console.log('Open MCT application running at %s:%s', options.host, options.port)
+});