Minimal start with a custom logger and device tracker.

lib/util/logger.js

@@ -0,0 +1,59 @@
+var util = require('util')
+
+function Log(tag, stream) {
+  this.tag = tag
+  this.stream = stream || process.stderr
+  this.levels = {
+    DEBUG: 'DBG'
+  , VERBOSE: 'VRB'
+  , INFO: 'INF'
+  , WARNING: 'WRN'
+  , ERROR: 'ERR'
+  , FATAL: 'FTL'
+  }
+}
+
+Log.prototype.debug = function() {
+  this._write(this._format(this.levels.DEBUG, arguments))
+}
+
+Log.prototype.verbose = function() {
+  this._write(this._format(this.levels.VERBOSE, arguments))
+}
+
+Log.prototype.info = function() {
+  this._write(this._format(this.levels.INFO, arguments))
+}
+
+Log.prototype.warn = function() {
+  this._write(this._format(this.levels.WARNING, arguments))
+}
+
+Log.prototype.error = function() {
+  this._write(this._format(this.levels.ERROR, arguments))
+}
+
+Log.prototype.fatal = function() {
+  this._write(this._format(this.levels.FATAL, arguments))
+}
+
+Log.prototype._format = function(priority, args) {
+  return util.format('%s %s/%s %d %s\n',
+    Log.prefix, priority, this.tag, process.pid, util.format.apply(util, args))
+}
+
+Log.prototype._write = function(out) {
+  this.stream.write(out)
+}
+
+Log.prefix = '*'
+
+Log.createLogger = function(tag) {
+  return new Log(tag)
+}
+
+Log.setPrefix = function(prefix) {
+  Log.prefix = prefix
+}
+
+exports = module.exports = Log