Update godeps

vendor/k8s.io/kubernetes/pkg/util/errors/BUILD

@@ -0,0 +1,28 @@
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_binary",
+    "go_library",
+    "go_test",
+    "cgo_library",
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "doc.go",
+        "errors.go",
+    ],
+    tags = ["automanaged"],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["errors_test.go"],
+    library = "go_default_library",
+    tags = ["automanaged"],
+    deps = [],
+)

vendor/k8s.io/kubernetes/pkg/util/errors/errors.go

@@ -147,6 +147,20 @@ func Flatten(agg Aggregate) Aggregate {
 	return NewAggregate(result)
 }
 
+// Reduce will return err or, if err is an Aggregate and only has one item,
+// the first item in the aggregate.
+func Reduce(err error) error {
+	if agg, ok := err.(Aggregate); ok && err != nil {
+		switch len(agg.Errors()) {
+		case 1:
+			return agg.Errors()[0]
+		case 0:
+			return nil
+		}
+	}
+	return err
+}
+
 // AggregateGoroutines runs the provided functions in parallel, stuffing all
 // non-nil errors into the returned Aggregate.
 // Returns nil if all the functions complete successfully.