Working date rolling file appender.

lib/appenders/dateFile.js

@@ -0,0 +1,49 @@
+var streams = require('../streams'),
+    layouts = require('../layouts'),
+    path = require('path'),
+    os = require('os'),
+    eol = os.EOL || '\n',
+    openFiles = [];
+
+//close open files on process exit.
+process.on('exit', function() {
+    openFiles.forEach(function (file) {
+        file.end();
+    });
+});
+
+/**
+ * File appender that rolls files according to a date pattern.
+ * @filename base filename.
+ * @pattern the format that will be added to the end of filename when rolling,
+ *          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) {
+    layout = layout || layouts.basicLayout;
+
+    var logFile = new streams.BufferedWriteStream(new streams.DateRollingFileStream(filename, pattern));
+    openFiles.push(logFile);
+
+    return function(logEvent) {
+        logFile.write(layout(logEvent) + eol, "utf8");
+    };
+
+}
+
+function configure(config, options) {
+    var layout;
+
+    if (config.layout) {
+	layout = layouts.layout(config.layout.type, config.layout);
+    }
+
+    if (options && options.cwd && !config.absolute) {
+        config.filename = path.join(options.cwd, config.filename);
+    }
+
+    return appender(config.filename, config.pattern, layout);
+}
+
+exports.appender = appender;
+exports.configure = configure;