add params required for sort byNamespace

Signed-off-by: Abhilash Gnan <abhilashgnan@gmail.com>

_proto/hapi/services/tiller.proto

@@ -125,6 +125,7 @@ message ListSort{
 		NAME = 1;
 		LAST_RELEASED = 2;
 		CHART_NAME = 3;
+		NAMESPACE = 4;
 	}
 
 	// SortOrder defines sort orders to augment sorting operations.

cmd/helm/list.go

@@ -79,6 +79,7 @@ type listCmd struct {
 	colWidth    uint
 	output      string
 	byChartName bool
+	byNamespace bool
 }
 
 type listResult struct {
@@ -136,6 +137,7 @@ func newListCmd(client helm.Interface, out io.Writer) *cobra.Command {
 	f.UintVar(&list.colWidth, "col-width", 60, "specifies the max column width of output")
 	f.StringVar(&list.output, "output", "", "output the specified format (json or yaml)")
 	f.BoolVarP(&list.byChartName, "chart-name", "c", false, "sort by chart name")
+	f.BoolVarP(&list.byNamespace, "namespace-name", "n", false, "sort by namespace name")
 
 	// TODO: Do we want this as a feature of 'helm list'?
 	//f.BoolVar(&list.superseded, "history", true, "show historical releases")
@@ -154,6 +156,9 @@ func (l *listCmd) run() error {
 	if l.byChartName {
 		sortBy = services.ListSort_CHART_NAME
 	}
+	if l.byNamespace {
+		sortBy = services.ListSort_NAMESPACE
+	}
 
 	sortOrder := services.ListSort_ASC
 	if l.sortDesc {

pkg/releaseutil/sorter.go

@@ -98,3 +98,15 @@ func SortByChartName(list []*rspb.Release) {
 	}
 	sort.Sort(s)
 }
+
+// SortByNamespace sorts the list of releases by a
+// release's namespace name in lexicographical order.
+func SortByNamespace(list []*rspb.Release) {
+	s := &sorter{list: list}
+	s.less = func(i, j int) bool {
+		ni := s.list[i].Namespace
+		nj := s.list[j].Namespace
+		return ni < nj
+	}
+	sort.Sort(s)
+}

pkg/tiller/release_list.go

@@ -68,6 +68,8 @@ func (s *ReleaseServer) ListReleases(req *services.ListReleasesRequest, stream s
 		relutil.SortByDate(rels)
 	case services.ListSort_CHART_NAME:
 		relutil.SortByChartName(rels)
+	case services.ListSort_NAMESPACE:
+		relutil.SortByNamespace(rels)
 	}
 
 	if req.SortOrder == services.ListSort_DESC {