Move logger into separate module

lib/handlebars/base.js

@@ -1,6 +1,7 @@
 import {createFrame, extend, toString} from './utils';
 import Exception from './exception';
 import {registerDefaultHelpers} from './helpers';
+import logger from './logger';
 
 export const VERSION = '3.0.1';
 export const COMPILER_REVISION = 6;
@@ -27,7 +28,7 @@ HandlebarsEnvironment.prototype = {
   constructor: HandlebarsEnvironment,
 
   logger: logger,
-  log: log,
+  log: logger.log,
 
   registerHelper: function(name, fn) {
     if (toString.call(name) === objectType) {
@@ -56,25 +57,6 @@ HandlebarsEnvironment.prototype = {
   }
 };
 
-export let logger = {
-  methodMap: { 0: 'debug', 1: 'info', 2: 'warn', 3: 'error' },
-
-  // State enum
-  DEBUG: 0,
-  INFO: 1,
-  WARN: 2,
-  ERROR: 3,
-  level: 1,
-
-  // Can be overridden in the host environment
-  log: function(level, message) {
-    if (typeof console !== 'undefined' && logger.level <= level) {
-      let method = logger.methodMap[level];
-      (console[method] || console.log).call(console, message);    // eslint-disable-line no-console
-    }
-  }
-};
-
 export let log = logger.log;
 
-export {createFrame};
+export {createFrame, logger};

lib/handlebars/logger.js

@@ -0,0 +1,20 @@
+let logger = {
+  methodMap: { 0: 'debug', 1: 'info', 2: 'warn', 3: 'error' },
+
+  // State enum
+  DEBUG: 0,
+  INFO: 1,
+  WARN: 2,
+  ERROR: 3,
+  level: 1,
+
+  // Can be overridden in the host environment
+  log: function(level, message) {
+    if (typeof console !== 'undefined' && logger.level <= level) {
+      let method = logger.methodMap[level];
+      (console[method] || console.log).call(console, message);    // eslint-disable-line no-console
+    }
+  }
+};
+
+export default logger;