first commit

core/log.js

@@ -0,0 +1,81 @@
+/*
+
+  Lightweight logger, print everything that is send to error, warn
+  and messages to stdout (the terminal). If config.debug is set in config
+  also print out everything send to debug.
+
+*/
+
+var moment = require('moment');
+var fmt = require('util').format;
+var _ = require('lodash');
+var util = require('./util');
+var config = util.getConfig();
+var debug = config.debug;
+var silent = config.silent;
+
+var sendToParent = function() {
+  var send = method => (...args) => {
+    process.send({log: method, message: args.join(' ')});
+  }
+
+  return {
+    error: send('error'),
+    warn: send('warn'),
+    info: send('info'),
+    write: send('write')
+  }
+}
+
+var Log = function() {
+  _.bindAll(this);
+  this.env = util.gekkoEnv();
+
+  if(this.env === 'standalone')
+    this.output = console;
+  else if(this.env === 'child-process')
+    this.output = sendToParent();
+};
+
+Log.prototype = {
+  _write: function(method, args, name) {
+    if(!name)
+      name = method.toUpperCase();
+
+    var message = moment().format('YYYY-MM-DD HH:mm:ss');
+    message += ' (' + name + '):\t';
+    message += fmt.apply(null, args);
+
+    this.output[method](message);
+  },
+  error: function() {
+    this._write('error', arguments);
+  },
+  warn: function() {
+    this._write('warn', arguments);
+  },
+  info: function() {
+    this._write('info', arguments);
+  },
+  write: function() {
+    var args = _.toArray(arguments);
+    var message = fmt.apply(null, args);
+    this.output.info(message);
+  }
+}
+
+if(debug)
+  Log.prototype.debug = function() {
+    this._write('info', arguments, 'DEBUG');  
+  }
+else
+  Log.prototype.debug = _.noop;
+
+if(silent) {
+  Log.prototype.debug = _.noop;
+  Log.prototype.info = _.noop;
+  Log.prototype.warn = _.noop;
+  Log.prototype.write = _.noop;
+}
+
+module.exports = new Log;