feat(log): log module version, abbr git hash and branch on start

lib/logger.js

@@ -1,7 +1,36 @@
-var bunyan = require('bunyan');
+var bunyan  = require('bunyan');
+var async   = require('async');
 
 var logLevel = process.env.LAMASSU_ENV === 'debug' ?
   'debug' :
   'info';
 
-module.exports = bunyan.createLogger({name: 'lamassu-server', level: logLevel});
+var bunyan = bunyan.createLogger({name: 'lamassu-server', level: logLevel});
+
+
+// log version
+var version = require('../package.json').version;
+bunyan.info('Version:', version);
+
+
+// log twitter stuff (optional)
+function wrapper(fn) {
+  return function(cb) {
+    fn(function(value) {
+      cb(null, value);
+    });
+  }
+}
+try {
+  var git = require('git-rev');
+  async.parallel([
+    wrapper(git.branch),
+    wrapper(git.short)
+  ],
+  function(err, values) {
+    bunyan.info('Git:', '#' + values[0], '@' + values[1]);
+  });
+} catch(_) {}
+
+
+module.exports = bunyan;

package.json

@@ -35,6 +35,7 @@
   },
   "devDependencies": {
     "chai": "^1.9.1",
+    "git-rev": "^0.2.1",
     "lodash": "^2.4.1",
     "mocha": "^1.21.4",
     "mockery": "^1.4.0"