really basic option parsing

src/git.js

@@ -14,6 +14,10 @@ function GitEngine() {
   this.id_gen = 0;
   this.branches = [];
 
+  // global variable to keep track of the options given
+  // along with the command call.
+  this.currentOptions = {};
+
   events.on('gitCommandReady', _.bind(this.dispatch, this));
 
   this.init();
@@ -95,17 +99,20 @@ GitEngine.prototype.makeCommit = function(parent) {
 };
 
 GitEngine.prototype.commit = function() {
-  var targetCommit = null;
-  if (this.getDetachedHead()) {
-    // in detached head mode, must warn user TODO
-    targetCommit = this.HEAD.get('target');
-  } else {
-    var targetBranch = this.HEAD.get('target');
-    targetCommit = targetBranch.get('target');
+  var targetCommit = this.getCommitFromRef(this.HEAD);
+  // if we want to ammend, go one above
+  if (this.currentOptions['--amend']) {
+    targetCommit = this.resolveId('HEAD~1');
   }
 
   var newCommit = this.makeCommit(targetCommit);
-  targetBranch.set('target', newCommit);
+
+  if (this.getDetachedHead()) {
+    events.trigger('commandProcessWarn', "Warning!! Detached HEAD state");
+  } else {
+    var targetBranch = this.HEAD.get('target');
+    targetBranch.set('target', newCommit);
+  }
 };
 
 GitEngine.prototype.resolveId = function(idOrTarget) {
@@ -255,8 +262,7 @@ GitEngine.prototype.deleteBranch = function(name) {
 };
 
 GitEngine.prototype.dispatch = function(commandObj) {
-  // TODO: parse arguments as well
-  console.log(commandObj);
+  this.currentOptions = commandObj.optionParser.supportedMap;
   this[commandObj.method](); 
 };
 

src/views.js

@@ -69,6 +69,10 @@ var CommandLineHistoryView = Backbone.View.extend({
       this.commandError, this
     ));
 
+    events.on('commandProcessWarn', _.bind(
+      this.commandWarn, this
+    ));
+
     events.on('commandResultPrint', _.bind(
       this.commandResultPrint, this
     ));
@@ -111,6 +115,18 @@ var CommandLineHistoryView = Backbone.View.extend({
     );
   },
 
+  commandWarn: function(msg) {
+    this.$('#commandDisplay').append(
+      _.template(
+        this.resultTemplate,
+        {
+          className: 'commandWarn',
+          result: msg
+        }
+      )
+    );
+  },
+
   commandResultPrint: function(err) {
     if (!err.msg.length) {
       // blank lines