add force option to obj.create_note

ext/rugged/rugged_note.c

@@ -119,6 +119,7 @@ static VALUE rb_git_note_lookup(int argc, VALUE *argv, VALUE self)
  *	- +:committer+: a hash with the signature for the committer
  *	- +:author+: a hash with the signature for the author
  *	- +:ref+: (optional): cannonical name of the reference to use, defaults to "refs/notes/commits"
+ *	- +:force+: (optional): overwrite existing note (disabled by default)
  *
  *	When the note is successfully written to disk, its +oid+ will be
  *	returned as a hex +String+.
@@ -134,7 +135,7 @@ static VALUE rb_git_note_lookup(int argc, VALUE *argv, VALUE self)
  */
 static VALUE rb_git_note_create(VALUE self, VALUE rb_data)
 {
-	VALUE rb_ref, rb_message;
+	VALUE rb_ref, rb_message, rb_force;
 	git_repository *repo = NULL;
 	const char *notes_ref = NULL;
 
@@ -145,6 +146,7 @@ static VALUE rb_git_note_create(VALUE self, VALUE rb_data)
 
 	git_object *target = NULL;
 	int error = 0;
+	int force = 0;
 
 	Check_Type(rb_data, T_HASH);
 
@@ -155,6 +157,10 @@ static VALUE rb_git_note_create(VALUE self, VALUE rb_data)
 
 	rb_ref = rb_hash_aref(rb_data, CSTR2SYM("ref"));
 
+	rb_force = rb_hash_aref(rb_data, CSTR2SYM("force"));
+	if (!NIL_P(rb_force))
+		force = rugged_parse_bool(rb_force);
+
 	if (!NIL_P(rb_ref)) {
 		Check_Type(rb_ref, T_STRING);
 		notes_ref = StringValueCStr(rb_ref);
@@ -179,7 +185,7 @@ static VALUE rb_git_note_create(VALUE self, VALUE rb_data)
 			notes_ref,
 			git_object_id(target),
 			StringValueCStr(rb_message),
-			0);
+			force);
 
 
 	git_signature_free(author);

test/note_test.rb

@@ -77,6 +77,52 @@ def test_create_note
     assert_equal note[:message], message
   end
 
+  def test_create_note_on_object_with_notes_raises
+    person = {:name => 'Scott', :email => 'schacon@gmail.com', :time => Time.now }
+    oid = "8496071c1b46c854b31185ea97743be6a8774479"
+    message ="This is the note message\n\nThis note is created from Rugged"
+    obj = @repo.lookup(oid)
+    obj.create_note(
+      :message => message,
+      :committer => person,
+      :author => person,
+      :ref => 'refs/notes/test'
+    )
+
+    assert_raises Rugged::RepositoryError do
+      obj.create_note(
+        :message => message,
+        :committer => person,
+        :author => person,
+        :ref => 'refs/notes/test'
+      )
+    end
+  end
+
+  def test_overwrite_object_note
+    person = {:name => 'Scott', :email => 'schacon@gmail.com', :time => Time.now }
+    oid = "8496071c1b46c854b31185ea97743be6a8774479"
+    message ="This is the note message\n\nThis note is created from Rugged"
+    obj = @repo.lookup(oid)
+    obj.create_note(
+      :message => message,
+      :committer => person,
+      :author => person,
+      :ref => 'refs/notes/test'
+    )
+
+    obj.create_note(
+      :message => 'new message',
+      :committer => person,
+      :author => person,
+      :ref => 'refs/notes/test',
+      :force => true
+    )
+
+    note = obj.notes('refs/notes/test')
+    assert_equal note[:message], 'new message'
+  end
+
   def test_remove_note
     oid = "36060c58702ed4c2a40832c51758d5344201d89a"
     person = {:name => 'Scott', :email => 'schacon@gmail.com', :time => Time.now }