Added log rolling to config files

README.md

@@ -2,7 +2,7 @@
 
 This is a conversion of the [log4js](http://log4js.berlios.de/index.html) 
 framework to work with [node](http://nodejs.org). I've mainly stripped out the browser-specific code
-and tidied up some of the javascript.
+and tidied up some of the javascript. It includes a basic file logger, with log rolling based on file size.
 
 NOTE: since v0.2.0 require('log4js') returns a function, so you need to call that function in your code before you can use it. I've done this to make testing easier (allows dependency injection).
 
@@ -47,13 +47,11 @@ Output
 ## configuration
 
 You can either configure the appenders and log levels manually (as above), or provide a 
-configuration file (`log4js.configure('path/to/file.json')`) explicitly, or just let log4js look for a file called `log4js.json` (it looks in the current directory first, then the require paths, and finally looks for the default config included in the same directory as the log4js.js file). 
-An example file can be found in test/log4js.json
+configuration file (`log4js.configure('path/to/file.json')`) explicitly, or just let log4js look for a file called `log4js.json` (it looks in the current directory first, then the require paths, and finally looks for the default config included in the same directory as the `log4js.js` file). 
+An example file can be found in `test/log4js.json`. An example config file with log rolling is in `test/with-log-rolling.json`
 
 ## todo
 
-I need to make a RollingFileAppender, which will do log rotation.
-
 patternLayout has no tests. This is mainly because I haven't found a use for it yet, 
 and am not entirely sure what it was supposed to do. It is more-or-less intact from 
 the original log4js.

lib/log4js.js

@@ -71,7 +71,7 @@ module.exports = function (fileSystem, standardOutput, configPaths) {
 	    if (config.layout) {
 		layout = layoutMakers[config.layout.type](config.layout);
 	    }
-	    return fileAppender(config.filename, layout);
+	    return fileAppender(config.filename, layout, config.maxLogSize, config.backups, config.pollInterval);
 	},
 	"console": function(config) {
 	    var layout;

test/logging.js

@@ -186,7 +186,10 @@ vows.describe('log4js').addBatch({
 		},
 		readFileSync: function(file, encoding) {
 		    return require('fs').readFileSync(file, encoding);
-		}
+		},
+                watchFile: function(file) {
+                    messages.watchedFile = file;
+                }
 	    },
 	    log4js = require('../lib/log4js')(fakeFS);
 	    return [ log4js, messages ];
@@ -220,7 +223,13 @@ vows.describe('log4js').addBatch({
 	    assert.length(messages['tmp-tests-warnings.log'], 2);
 	    assert.deepEqual(messages['tmp-tests.log'], ['main\n','both\n','both\n','main\n']);
 	    assert.deepEqual(messages['tmp-tests-warnings.log'], ['both\n','both\n']);
-	}
+	},
+        'should handle fileAppender with log rolling' : function(args) {
+            var log4js = args[0], messages = args[1];
+            delete messages['tmp-test.log'];
+            log4js.configure('test/with-log-rolling.json');
+            assert.equal(messages.watchedFile, 'tmp-test.log');
+        }            
     },
 
     'with no appenders defined' : {

test/with-log-rolling.json

@@ -0,0 +1,11 @@
+{
+  "appenders": [
+    {
+      "type": "file",
+      "filename": "tmp-test.log",
+      "maxLogSize": 1024,
+      "backups": 3,
+      "pollInterval": 15
+    }
+  ]
+}