Introduce configuration template

Summary: @​public

We're rolling out a replacement for `local-cli`. As part of the process we moved many hardcoded values into a JS based configuration file.

Reviewed By: @vjeux

Differential Revision: D2533111

fb-gh-sync-id: 7250bddee9989b089ded409104e098ef15d79498

local-cli/generator/index.js

@@ -40,6 +40,10 @@ module.exports = yeoman.generators.NamedBase.extend({
       { 'Libraries\/react-native\/react-native-interface.js' : 'node_modules/react-native/Libraries/react-native/react-native-interface.js' }
     );
 
+    this.fs.copy(
+      this.templatePath('rn-cli.config.js'),
+      this.destinationPath('rn-cli.config.js')
+    );
     this.fs.copy(
       this.templatePath('_gitignore'),
       this.destinationPath('.gitignore')

local-cli/generator/templates/rn-cli.config.js

@@ -0,0 +1,27 @@
+'use strict';
+
+var blacklist = require('./node_modules/react-native/packager/blacklist');
+
+var config = {
+  getProjectRoots() {
+    return this._getRoots();
+  },
+
+  getAssetRoots() {
+    return this._getRoots();
+  },
+
+  getBlacklistRE() {
+    return blacklist('');
+  },
+
+  getTransformModulePath() {
+    return require.resolve('./node_modules/react-native/packager/transformer');
+  },
+
+  _getRoots() {
+    return [__dirname];
+  }
+};
+
+module.exports = config;