[build] expose build specific babel config

During build we transpile the server source to prevent runtime transpilation with babel/register. In order to support untranspiled plugin code, we still use babel/register with special ignore options, which used to be included in cli/index.js and now is moved to src/optimize/babelOptions.js so other code that wants to initialize a server (without the cli) can also configure babel/register.

src/cli/index.build.js

@@ -1,12 +0,0 @@
-var _ = require('lodash');
-var fromRoot = require('requirefrom')('src/utils')('fromRoot');
-
-var babelOpts = _.defaults({
-  ignore: [
-    fromRoot('src'),
-    /[\\\/](node_modules|bower_components)[\\\/]/
-  ]
-}, require('../optimize/babelOptions').node);
-
-require('babel/register')(babelOpts);
-require('./cli');

src/optimize/babelOptions.build.js

@@ -0,0 +1,14 @@
+var fromRoot = require('requirefrom')('src/utils')('fromRoot');
+
+exports.webpack = {
+  stage: 1,
+  nonStandard: false,
+  optional: ['runtime']
+};
+
+exports.node = Object.assign({
+  ignore: [
+    fromRoot('src'),
+    /[\\\/](node_modules|bower_components)[\\\/]/
+  ]
+}, exports.webpack);

tasks/build/babelOptions.js

@@ -0,0 +1,13 @@
+module.exports = function (grunt) {
+
+  var srcFile = 'build/kibana/src/optimize/babelOptions.js';
+  var buildFile = 'build/kibana/src/optimize/babelOptions.build.js';
+  var rename = require('fs').renameSync;
+  var unlink = require('fs').unlinkSync;
+
+  grunt.registerTask('_build:babelOptions', function () {
+    unlink(srcFile);
+    rename(buildFile, srcFile);
+  });
+
+};

tasks/build/cliIndex.js

@@ -1,13 +0,0 @@
-module.exports = function (grunt) {
-
-  var srcFile = 'build/kibana/src/cli/index.js';
-  var buildFile = 'build/kibana/src/cli/index.build.js';
-  var rename = require('fs').renameSync;
-  var unlink = require('fs').unlinkSync;
-
-  grunt.registerTask('_build:cliIndex', function () {
-    unlink(srcFile);
-    rename(buildFile, srcFile);
-  });
-
-};

tasks/build/index.js

@@ -9,7 +9,7 @@ module.exports = function (grunt) {
     '_build:downloadNodeBuilds:start',
     'copy:devSource',
     'babel:build',
-    '_build:cliIndex',
+    '_build:babelOptions',
     '_build:installedPlugins',
     '_build:packageJson',
     '_build:readme',