add option alwaysIncludePattern to dateTime appender to always use the filename with the pattern included when logging

lib/appenders/dateFile.js

@@ -19,10 +19,10 @@ process.on('exit', function() {
  *          also used to check when to roll files - defaults to '.yyyy-MM-dd'
  * @layout layout function for log messages - defaults to basicLayout
  */
-function appender(filename, pattern, layout) {
+function appender(filename, pattern, alwaysIncludePattern, layout) {
     layout = layout || layouts.basicLayout;
 
-    var logFile = new streams.DateRollingFileStream(filename, pattern);
+    var logFile = new streams.DateRollingFileStream(filename, pattern, alwaysIncludePattern);
     openFiles.push(logFile);
 
     return function(logEvent) {
@@ -38,11 +38,15 @@ function configure(config, options) {
 	layout = layouts.layout(config.layout.type, config.layout);
     }
     
+    if (!config.alwaysIncludePattern) {
+        config.alwaysIncludePattern = false;
+    }
+
     if (options && options.cwd && !config.absolute) {
         config.filename = path.join(options.cwd, config.filename);
     }
 
-    return appender(config.filename, config.pattern, layout);
+    return appender(config.filename, config.pattern, config.alwaysIncludePattern, layout);
 }
 
 exports.appender = appender;

lib/streams/DateRollingFileStream.js

@@ -13,7 +13,7 @@ if (process.env.NODE_DEBUG && /\blog4js\b/.test(process.env.NODE_DEBUG)) {
     debug = function() { };
 }
 
-function DateRollingFileStream(filename, pattern, options, now) {
+function DateRollingFileStream(filename, pattern, alwaysIncludePattern, options, now) {
     debug("Now is " + now);
     if (pattern && typeof(pattern) === 'object') {
         now = options;
@@ -23,6 +23,12 @@ function DateRollingFileStream(filename, pattern, options, now) {
     this.pattern = pattern || '.yyyy-MM-dd';
     this.now = now || Date.now;
     this.lastTimeWeWroteSomething = format.asString(this.pattern, new Date(this.now()));
+    
+    this.alwaysIncludePattern = alwaysIncludePattern;
+    if (this.alwaysIncludePattern) {
+        this.baseFilename = filename;
+        filename = filename + this.lastTimeWeWroteSomething;
+    }
     debug("this.now is " + this.now + ", now is " + now);
 
     DateRollingFileStream.super_.call(this, filename, options);
@@ -43,7 +49,7 @@ DateRollingFileStream.prototype.shouldRoll = function() {
 
 DateRollingFileStream.prototype.roll = function(filename, callback) {
     var that = this,
-        newFilename = filename + this.previousTime;
+        newFilename = this.baseFilename + this.previousTime;
 
     debug("Starting roll");
 

test/dateFileAppender-test.js

@@ -92,6 +92,42 @@ vows.describe('../lib/appenders/dateFile').addBatch({
 	        assert.include(contents, 'this should be written to the file\n');
                 assert.equal(contents.indexOf('this should not be written to the file'), -1);
 	    }
+        },
+	'with options.alwaysIncludePattern': {
+	  topic: function() {
+	    var log4js = require('../lib/log4js')
+	      , format = require('../lib/date_format')
+	      , logger
+	      , options = {
+		  "appenders": [
+		    {
+		      "category": "tests", 
+		      "type": "dateFile", 
+		      "filename": "test/date-file-test",
+		      "pattern": "-from-MM-dd.log",
+		      "alwaysIncludePattern": true,
+		      "layout": { 
+			"type": "messagePassThrough" 
+		      }
+		    }
+		  ]
+		}
+	      , thisTime = format.asString(options.appenders[0].pattern, new Date());
+	    log4js.clearAppenders();
+	    log4js.configure(options);
+	    logger = log4js.getLogger('tests');
+	    logger.warn('this should be written to the file');
+	    return thisTime;
+	  },
+	  teardown: function(topic) {
+	    removeFile('date-file-test' + topic);
+	  },
+	  'should create file with the correct pattern': function(topic) {
+	    assert.equal(fs.existsSync(path.join(__dirname, 'date-file-test' + topic)), true);
+	  },
+	  'should not create file with the base filename': function(topic) {
+	    assert.equal(fs.existsSync(path.join(__dirname, 'date-file-test')), false);
+	  }
 	}
 
     }