fixes #20: show git commit number in 'version'

Signed-off-by: Eric Wang <skygragon@gmail.com>

Author: skygragon

lib/commands/version.js

@@ -1,4 +1,6 @@
+var chalk = require('chalk');
 var log = require('loglevel');
+var sprintf = require('sprintf-js').sprintf;
 
 var cmd = {
   command: 'version',
@@ -8,18 +10,21 @@ var cmd = {
 };
 
 cmd.handler = function(argv) {
-  var version = require('../../package.json').version;
+  var appVersion = require('../../package.json').version;
   if (log.getLevel() >= log.levels.INFO) {
-    return log.info(version);
+    return log.info(appVersion);
   }
 
+  var gitVersion = require('child_process').execSync('git rev-parse --short HEAD').toString().trim();
+  var version = sprintf('%s (%s)', chalk.green(appVersion), chalk.yellow(gitVersion));
+
   var logo = [
     ' _           _                  _      ',
     '| |         | |                | |     ',
     '| | ___  ___| |_  ___  ___   __| | ___ ',
     '| |/ _ \\/ _ \\ __|/ __|/ _ \\ / _` |/ _ \\',
     '| |  __/  __/ |_  (__| (_) | (_| |  __/',
-    '|_|\\___|\\___|\\__|\\___|\\___/ \\__,_|\\___|  CLI v' + version
+    '|_|\\___|\\___|\\__|\\___|\\___/ \\__,_|\\___|  CLI ' + version
   ].join('\n');
   log.debug(logo);
 
@@ -29,7 +34,6 @@ cmd.handler = function(argv) {
   log.debug('Config:', h.getConfigFile());
 
   var config = require('../config');
-  var sprintf = require('sprintf-js').sprintf;
   log.debug('\n[Configuration]');
   Object.getOwnPropertyNames(config).sort().forEach(function(k) {
     log.debug(sprintf('%-16s %s', k + ':', config[k]));