Allow Git tag listing

Author: RobbinHabermehl

lib/tag.js

@@ -10,20 +10,30 @@ module.exports = function (version, message, opt, cb) {
     cb = opt;
     opt = {};
   }
+  if (!cb && typeof version === 'function') {
+    cb = version;
+    version = '';
+    message = '';
+  }
   if (!cb || typeof cb !== 'function') cb = function () {};
-  if (!version) return cb(new Error('Version must be defined'));
-  if (!message) return cb(new Error('Message must be defined'));
+  if (!message && version) return cb(new Error('Message must be defined'));
   if (!opt) opt = {};
   if (!opt.cwd) opt.cwd = process.cwd();
   if (!opt.args) opt.args = ' ';
 
   var signedarg = opt.signed ? ' -s ' : ' -a ';
 
-  var cmd = 'git tag ' + signedarg + ' -m "' + message + '" ' + opt.args + ' ' + escape([version]);
+  var cmd = 'git tag';
+  if (version !== '') {
+    cmd += ' ' + signedarg + ' -m "' + message + '" ' + opt.args + ' ' + escape([version]);
+  }
   var templ = gutil.template(cmd, {file:message});
   return exec(templ, {cwd: opt.cwd}, function(err, stdout, stderr){
     if (err) return cb(err);
-    if (!opt.quiet) gutil.log(stdout, stderr);
-    cb();
+    if (!opt.quiet && version !== '') gutil.log(stdout, stderr);
+    if (version === '') {
+      stdout = stdout.split('\n');
+    }
+    cb(stdout);
   });
 };