Added support for git tag -d <tag> and fixed a bug where a duplicate tag name wouldn't show in the error-msg

src/js/git/commands.js

@@ -811,8 +811,41 @@ var commandConfig = {
 
   tag: {
     regex: /^git +tag($|\s)/,
+    options: [
+      '-d'
+    ],
     execute: function(engine, command) {
       var generalArgs = command.getGeneralArgs();
+      var commandOptions = command.getOptionsMap();
+
+      if (commandOptions['-d']) {
+        var tagID = commandOptions['-d'];
+        var tagToRemove;
+
+        assertIsRef(engine, tagID);
+        
+        command.oneArgImpliedHead(tagID);
+        engine.tagCollection.each(function(tag) {
+          if(tag.get('id') == tagID){
+            tagToRemove = tag;
+          }
+        }, true);
+        
+        if(tagToRemove == undefined){
+          throw new GitError({
+            msg: intl.todo(
+              'No tag found, nothing to remove'
+            )
+          });
+        }
+
+        engine.tagCollection.remove(tagToRemove);
+        delete engine.refs[tagID];
+        
+        engine.gitVisuals.refreshTree();
+        return;
+      }
+
       if (generalArgs.length === 0) {
         var tags = engine.getTags();
         engine.printTags(tags);