Move all files to 2017/

2017/web/core/scripts/js/babel-es6-watch.js

@@ -0,0 +1,43 @@
+/**
+ * @file
+ *
+ * Watch changes to *.es6.js files and compile them to ES5 during development.
+ *
+ * @internal This file is part of the core javascript build process and is only
+ * meant to be used in that context.
+ */
+
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const chokidar = require('chokidar');
+
+const changeOrAdded = require('./changeOrAdded');
+const log = require('./log');
+
+// Match only on .es6.js files.
+const fileMatch = './**/*.es6.js';
+// Ignore everything in node_modules
+const watcher = chokidar.watch(fileMatch, {
+  ignoreInitial: true,
+  ignored: './node_modules/**'
+});
+
+const unlinkHandler = (err) => {
+  if (err) {
+    log(err);
+  }
+};
+
+// Watch for filesystem changes.
+watcher
+  .on('add', changeOrAdded)
+  .on('change', changeOrAdded)
+  .on('unlink', (filePath) => {
+    const fileName = filePath.slice(0, -7);
+    fs.stat(`${fileName}.js`, () => {
+      fs.unlink(`${fileName}.js`, unlinkHandler);
+    });
+  })
+  .on('ready', () => log(`Watching '${fileMatch}' for changes.`));