Remove kubectl's dependence on schema file in pkg/api/validation.

**What this PR does / why we need it**:

Makes functions in validation/schema.go private to kubectl,
further isolating kubectl.

**Which issue this PR fixes**

Part of a series of PRs to address kubernetes/community#598

**Release note**:
```release-note
NONE
```

build/root/Makefile

@@ -525,7 +525,7 @@ bazel-build:
 	@echo "$$BAZEL_BUILD_HELP_INFO"
 else
 bazel-build:
-	bazel build //cmd/... //pkg/... //federation/... //plugin/... //third_party/... //examples/... //test/... //vendor/k8s.io/...
+	bazel build //cmd/... //hack/... //pkg/... //federation/... //plugin/... //third_party/... //examples/... //test/... //vendor/k8s.io/...
 endif
 
 

build/visible_to/BUILD

@@ -47,6 +47,9 @@ package_group(
 package_group(
     name = "COMMON_testing",
     packages = [
+        "//hack",
+        "//hack/lib",
+        "//hack/make-rules",
         "//test/e2e",
         "//test/e2e/framework",
         "//test/e2e/kubectl",
@@ -69,6 +72,13 @@ package_group(
     ],
 )
 
+package_group(
+    name = "cluster",
+    packages = [
+        "//cluster/...",
+    ],
+)
+
 package_group(
     name = "KUBEADM_BAD",
     packages = [
@@ -363,6 +373,16 @@ package_group(
     ],
 )
 
+package_group(
+    name = "pkg_kubectl_validation_CONSUMERS",
+    packages = [
+        "//pkg/kubectl",
+        "//pkg/kubectl/cmd/testing",
+        "//pkg/kubectl/cmd/util",
+        "//pkg/kubectl/resource",
+    ],
+)
+
 # Added by ./hack/verify-bazel.sh; should be excluded from
 # that script since it makes no sense here.
 filegroup(

cluster/BUILD

@@ -18,6 +18,7 @@ filegroup(
         "//cluster/images/etcd-version-monitor:all-srcs",
         "//cluster/images/etcd/attachlease:all-srcs",
         "//cluster/images/etcd/rollback:all-srcs",
+        "//cluster/lib:all-srcs",
         "//cluster/saltbase:all-srcs",
     ],
     tags = ["automanaged"],

cluster/lib/BUILD

@@ -0,0 +1,25 @@
+sh_library(
+    name = "lib",
+    srcs = [
+        "logging.sh",
+    ],
+    visibility = [
+        "//build/visible_to:COMMON_testing",
+        "//build/visible_to:cluster",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = [
+        "//build/visible_to:cluster",
+    ],
+)

hack/BUILD

@@ -22,6 +22,7 @@ filegroup(
         "//hack/cmd/teststale:all-srcs",
         "//hack/e2e-internal:all-srcs",
         "//hack/lib:all-srcs",
+        "//hack/make-rules:all-srcs",
     ],
     tags = ["automanaged"],
 )

hack/lib/BUILD

@@ -1,5 +1,21 @@
 package(default_visibility = ["//visibility:public"])
 
+sh_library(
+    name = "lib",
+    srcs = [
+        "etcd.sh",
+        "golang.sh",
+        "init.sh",
+        "swagger.sh",
+        "test.sh",
+        "util.sh",
+        "version.sh",
+    ],
+    deps = [
+        "//cluster/lib",
+    ],
+)
+
 filegroup(
     name = "package-srcs",
     srcs = glob(["**"]),

hack/make-rules/BUILD

@@ -0,0 +1,121 @@
+# Scripts runnable from make, e.g.
+#
+#    cd $GOPATH/src/k8s.io/kubernetes
+#    make test-e2e-node
+#
+# The sh_binary rules below exist only to validate
+# dependencies; if a shell dependency is accidentally
+# deleted, a presubmit BUILD will fail.
+#
+# If the scripts sourced their dependencies from
+# $RUNFILES (rather than $BASH_SOURCE/../.. or
+# whatever), then bazel build hack/...  would install
+# runnable, hermetically sealed shell "binaries".
+# E.g. the following command would work:
+#
+#   ./bazel-bin/hack/make-rules/test-e2e-node
+#
+# TODO(#47064): Should be a sh_test instead of sh_binary
+sh_binary(
+    name = "test-cmd",
+    srcs = ["test-cmd.sh"],
+    deps = [
+        ":test-cmd-util",
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "test-e2e-node",
+    srcs = ["test-e2e-node.sh"],
+    deps = [
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "test-federation-cmd",
+    srcs = ["test-federation-cmd.sh"],
+    deps = [
+        ":test-cmd-util",
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "test-integration",
+    srcs = ["test-cmd.sh"],
+    deps = [
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "test-kubeadm-cmd",
+    srcs = ["test-kubeadm-cmd.sh"],
+    deps = [
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "build",
+    srcs = ["build.sh"],
+    deps = [
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "cross",
+    srcs = ["cross.sh"],
+    deps = [
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "test",
+    srcs = ["test.sh"],
+    deps = [
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "vet",
+    srcs = ["vet.sh"],
+    deps = [
+        "//hack/lib",
+    ],
+)
+
+sh_binary(
+    name = "verify",
+    srcs = ["verify.sh"],
+    deps = [
+        "//hack/lib",
+    ],
+)
+
+sh_library(
+    name = "test-cmd-util",
+    srcs = [
+        "test-cmd-util.sh",
+    ],
+    data = ["//pkg/kubectl/validation:testdata/v1/validPod.yaml"],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+    visibility = ["//visibility:private"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//visibility:public"],
+)

hack/make-rules/test-cmd-util.sh

@@ -687,7 +687,7 @@ run_pod_tests() {
   kube::test::get_object_assert pods "{{range.items}}{{$id_field}}:{{end}}" 'valid-pod:'
 
   ## Patch can modify a local object
-  kubectl patch --local -f pkg/api/validation/testdata/v1/validPod.yaml --patch='{"spec": {"restartPolicy":"Never"}}' -o jsonpath='{.spec.restartPolicy}' | grep -q "Never"
+  kubectl patch --local -f pkg/kubectl/validation/testdata/v1/validPod.yaml --patch='{"spec": {"restartPolicy":"Never"}}' -o jsonpath='{.spec.restartPolicy}' | grep -q "Never"
 
   ## Patch pod can change image
   # Command

pkg/api/validation/BUILD

@@ -1,5 +1,3 @@
-package(default_visibility = ["//visibility:public"])
-
 load(
     "@io_bazel_rules_go//go:def.bzl",
     "go_library",
@@ -11,9 +9,9 @@ go_library(
     srcs = [
         "doc.go",
         "events.go",
-        "schema.go",
         "validation.go",
     ],
+    visibility = ["//visibility:public"],
     deps = [
         "//pkg/api:go_default_library",
         "//pkg/api/helper:go_default_library",
@@ -24,8 +22,6 @@ go_library(
         "//pkg/capabilities:go_default_library",
         "//pkg/features:go_default_library",
         "//pkg/security/apparmor:go_default_library",
-        "//vendor/github.com/emicklei/go-restful-swagger12:go_default_library",
-        "//vendor/github.com/exponent-io/jsonpath:go_default_library",
         "//vendor/github.com/golang/glog:go_default_library",
         "//vendor/k8s.io/api/core/v1:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/api/equality:go_default_library",
@@ -33,16 +29,13 @@ go_library(
         "//vendor/k8s.io/apimachinery/pkg/api/resource:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/api/validation:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1/validation:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/labels:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/runtime/schema:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/intstr:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/validation:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/validation/field:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/util/yaml:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/util/feature:go_default_library",
     ],
 )
@@ -51,38 +44,22 @@ go_test(
     name = "go_default_test",
     srcs = [
         "events_test.go",
-        "schema_test.go",
         "validation_test.go",
     ],
-    data = [
-        "testdata/v1/invalidPod.yaml",
-        "testdata/v1/invalidPod1.json",
-        "testdata/v1/invalidPod2.json",
-        "testdata/v1/invalidPod3.json",
-        "testdata/v1/invalidPod4.yaml",
-        "testdata/v1/validPod.yaml",
-        "//api/swagger-spec",
-    ],
     library = ":go_default_library",
     deps = [
         "//pkg/api:go_default_library",
         "//pkg/api/helper:go_default_library",
         "//pkg/api/testapi:go_default_library",
-        "//pkg/api/testing:go_default_library",
         "//pkg/capabilities:go_default_library",
         "//pkg/security/apparmor:go_default_library",
-        "//vendor/github.com/ghodss/yaml:go_default_library",
         "//vendor/k8s.io/api/core/v1:go_default_library",
-        "//vendor/k8s.io/api/extensions/v1beta1:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/api/resource:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/api/testing/fuzzer:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/runtime:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/intstr:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/validation:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/validation/field:go_default_library",
-        "//vendor/k8s.io/apimachinery/pkg/util/yaml:go_default_library",
         "//vendor/k8s.io/apiserver/pkg/util/feature:go_default_library",
     ],
 )
@@ -91,11 +68,11 @@ filegroup(
     name = "package-srcs",
     srcs = glob(["**"]),
     tags = ["automanaged"],
-    visibility = ["//visibility:private"],
 )
 
 filegroup(
     name = "all-srcs",
     srcs = [":package-srcs"],
     tags = ["automanaged"],
+    visibility = ["//visibility:public"],
 )

pkg/api/validation/validation_test.go

@@ -32,6 +32,7 @@ import (
 	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/helper"
+	_ "k8s.io/kubernetes/pkg/api/testapi"
 	"k8s.io/kubernetes/pkg/capabilities"
 	"k8s.io/kubernetes/pkg/security/apparmor"
 )

pkg/hyperkube/BUILD

@@ -1,15 +1,5 @@
 package(default_visibility = ["//visibility:public"])
 
-load(
-    "@io_bazel_rules_go//go:def.bzl",
-    "go_library",
-)
-
-go_library(
-    name = "go_default_library",
-    srcs = ["doc.go"],
-)
-
 filegroup(
     name = "package-srcs",
     srcs = glob(["**"]),
@@ -22,3 +12,10 @@ filegroup(
     srcs = [":package-srcs"],
     tags = ["automanaged"],
 )
+
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["doc.go"],
+)

pkg/kubectl/BUILD

@@ -191,6 +191,7 @@ filegroup(
         "//pkg/kubectl/resource:all-srcs",
         "//pkg/kubectl/testing:all-srcs",
         "//pkg/kubectl/util:all-srcs",
+        "//pkg/kubectl/validation:all-srcs",
     ],
     tags = ["automanaged"],
 )

pkg/kubectl/cmd/testing/BUILD

@@ -16,13 +16,13 @@ go_library(
         "//federation/client/clientset_generated/federation_clientset:go_default_library",
         "//pkg/api:go_default_library",
         "//pkg/api/testapi:go_default_library",
-        "//pkg/api/validation:go_default_library",
         "//pkg/client/clientset_generated/internalclientset:go_default_library",
         "//pkg/kubectl:go_default_library",
         "//pkg/kubectl/cmd/util:go_default_library",
         "//pkg/kubectl/cmd/util/openapi:go_default_library",
         "//pkg/kubectl/plugins:go_default_library",
         "//pkg/kubectl/resource:go_default_library",
+        "//pkg/kubectl/validation:go_default_library",
         "//pkg/printers:go_default_library",
         "//vendor/github.com/emicklei/go-restful-swagger12:go_default_library",
         "//vendor/github.com/spf13/cobra:go_default_library",

pkg/kubectl/cmd/testing/fake.go

@@ -39,13 +39,13 @@ import (
 	fedclientset "k8s.io/kubernetes/federation/client/clientset_generated/federation_clientset"
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/testapi"
-	"k8s.io/kubernetes/pkg/api/validation"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
 	"k8s.io/kubernetes/pkg/kubectl"
 	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
 	"k8s.io/kubernetes/pkg/kubectl/cmd/util/openapi"
 	"k8s.io/kubernetes/pkg/kubectl/plugins"
 	"k8s.io/kubernetes/pkg/kubectl/resource"
+	"k8s.io/kubernetes/pkg/kubectl/validation"
 	"k8s.io/kubernetes/pkg/printers"
 )
 

pkg/kubectl/cmd/util/BUILD

@@ -25,7 +25,6 @@ go_library(
         "//federation/client/clientset_generated/federation_clientset:go_default_library",
         "//pkg/api:go_default_library",
         "//pkg/api/v1:go_default_library",
-        "//pkg/api/validation:go_default_library",
         "//pkg/apis/apps:go_default_library",
         "//pkg/apis/batch:go_default_library",
         "//pkg/apis/extensions:go_default_library",
@@ -37,6 +36,7 @@ go_library(
         "//pkg/kubectl/cmd/util/openapi:go_default_library",
         "//pkg/kubectl/plugins:go_default_library",
         "//pkg/kubectl/resource:go_default_library",
+        "//pkg/kubectl/validation:go_default_library",
         "//pkg/printers:go_default_library",
         "//pkg/printers/internalversion:go_default_library",
         "//pkg/version:go_default_library",
@@ -93,7 +93,6 @@ go_test(
         "//pkg/api:go_default_library",
         "//pkg/api/testapi:go_default_library",
         "//pkg/api/testing:go_default_library",
-        "//pkg/api/validation:go_default_library",
         "//pkg/apis/apps:go_default_library",
         "//pkg/apis/batch:go_default_library",
         "//pkg/apis/extensions:go_default_library",
@@ -102,6 +101,7 @@ go_test(
         "//pkg/controller:go_default_library",
         "//pkg/kubectl:go_default_library",
         "//pkg/kubectl/resource:go_default_library",
+        "//pkg/kubectl/validation:go_default_library",
         "//vendor/github.com/emicklei/go-restful-swagger12:go_default_library",
         "//vendor/github.com/googleapis/gnostic/OpenAPIv2:go_default_library",
         "//vendor/github.com/stretchr/testify/assert:go_default_library",

pkg/kubectl/cmd/util/factory.go

@@ -29,7 +29,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/emicklei/go-restful-swagger12"
+	swagger "github.com/emicklei/go-restful-swagger12"
 	"github.com/golang/glog"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
@@ -48,13 +48,13 @@ import (
 	fedclientset "k8s.io/kubernetes/federation/client/clientset_generated/federation_clientset"
 	"k8s.io/kubernetes/pkg/api"
 	apiv1 "k8s.io/kubernetes/pkg/api/v1"
-	"k8s.io/kubernetes/pkg/api/validation"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
 	coreclient "k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/typed/core/internalversion"
 	"k8s.io/kubernetes/pkg/kubectl"
 	"k8s.io/kubernetes/pkg/kubectl/cmd/util/openapi"
 	"k8s.io/kubernetes/pkg/kubectl/plugins"
 	"k8s.io/kubernetes/pkg/kubectl/resource"
+	"k8s.io/kubernetes/pkg/kubectl/validation"
 	"k8s.io/kubernetes/pkg/printers"
 )
 

pkg/kubectl/cmd/util/factory_object_mapping.go

@@ -40,7 +40,6 @@ import (
 	restclient "k8s.io/client-go/rest"
 	"k8s.io/kubernetes/federation/apis/federation"
 	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/api/validation"
 	"k8s.io/kubernetes/pkg/apis/apps"
 	"k8s.io/kubernetes/pkg/apis/batch"
 	"k8s.io/kubernetes/pkg/apis/extensions"
@@ -49,6 +48,7 @@ import (
 	"k8s.io/kubernetes/pkg/kubectl"
 	"k8s.io/kubernetes/pkg/kubectl/cmd/util/openapi"
 	"k8s.io/kubernetes/pkg/kubectl/resource"
+	"k8s.io/kubernetes/pkg/kubectl/validation"
 	"k8s.io/kubernetes/pkg/printers"
 	printersinternal "k8s.io/kubernetes/pkg/printers/internalversion"
 )

pkg/kubectl/cmd/util/factory_test.go

@@ -45,12 +45,12 @@ import (
 	clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/testapi"
-	"k8s.io/kubernetes/pkg/api/validation"
 	"k8s.io/kubernetes/pkg/apis/extensions"
 	"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset/fake"
 	"k8s.io/kubernetes/pkg/controller"
 	"k8s.io/kubernetes/pkg/kubectl"
 	"k8s.io/kubernetes/pkg/kubectl/resource"
+	"k8s.io/kubernetes/pkg/kubectl/validation"
 )
 
 func TestNewFactoryDefaultFlagBindings(t *testing.T) {

pkg/kubectl/resource/BUILD

@@ -22,7 +22,7 @@ go_library(
     ],
     deps = [
         "//pkg/api:go_default_library",
-        "//pkg/api/validation:go_default_library",
+        "//pkg/kubectl/validation:go_default_library",
         "//vendor/github.com/golang/glog:go_default_library",
         "//vendor/golang.org/x/text/encoding/unicode:go_default_library",
         "//vendor/golang.org/x/text/transform:go_default_library",

pkg/kubectl/resource/builder.go

@@ -30,7 +30,7 @@ import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/apimachinery/pkg/util/sets"
-	"k8s.io/kubernetes/pkg/api/validation"
+	"k8s.io/kubernetes/pkg/kubectl/validation"
 )
 
 var FileExtensions = []string{".json", ".yaml", ".yml"}

pkg/kubectl/resource/visitor.go

@@ -38,7 +38,7 @@ import (
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/apimachinery/pkg/util/yaml"
 	"k8s.io/apimachinery/pkg/watch"
-	"k8s.io/kubernetes/pkg/api/validation"
+	"k8s.io/kubernetes/pkg/kubectl/validation"
 )
 
 const (

pkg/kubectl/validation/BUILD

@@ -0,0 +1,78 @@
+licenses(["notice"])
+
+load(
+    "@io_bazel_rules_go//go:def.bzl",
+    "go_library",
+    "go_test",
+)
+
+exports_files(
+    srcs = [
+        "testdata/v1/validPod.yaml",
+    ],
+    visibility = ["//build/visible_to:COMMON_testing"],
+)
+
+filegroup(
+    name = "testdata",
+    srcs = [
+        "testdata/v1/invalidPod.yaml",
+        "testdata/v1/invalidPod1.json",
+        "testdata/v1/invalidPod2.json",
+        "testdata/v1/invalidPod3.json",
+        "testdata/v1/invalidPod4.yaml",
+        "testdata/v1/validPod.yaml",
+    ],
+    visibility = ["//build/visible_to:COMMON_testing"],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["schema_test.go"],
+    data = [
+        ":testdata",
+        "//api/swagger-spec",
+    ],
+    library = ":go_default_library",
+    tags = ["automanaged"],
+    deps = [
+        "//pkg/api:go_default_library",
+        "//pkg/api/testapi:go_default_library",
+        "//pkg/api/testing:go_default_library",
+        "//vendor/github.com/ghodss/yaml:go_default_library",
+        "//vendor/k8s.io/api/core/v1:go_default_library",
+        "//vendor/k8s.io/api/extensions/v1beta1:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/api/testing/fuzzer:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/runtime:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/yaml:go_default_library",
+    ],
+)
+
+go_library(
+    name = "go_default_library",
+    srcs = ["schema.go"],
+    tags = ["automanaged"],
+    visibility = ["//build/visible_to:pkg_kubectl_validation_CONSUMERS"],
+    deps = [
+        "//pkg/api/util:go_default_library",
+        "//vendor/github.com/emicklei/go-restful-swagger12:go_default_library",
+        "//vendor/github.com/exponent-io/jsonpath:go_default_library",
+        "//vendor/github.com/golang/glog:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/apis/meta/v1/unstructured:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/yaml:go_default_library",
+    ],
+)
+
+filegroup(
+    name = "package-srcs",
+    srcs = glob(["**"]),
+    tags = ["automanaged"],
+)
+
+filegroup(
+    name = "all-srcs",
+    srcs = [":package-srcs"],
+    tags = ["automanaged"],
+    visibility = ["//build/visible_to:pkg_kubectl_validation_CONSUMERS"],
+)

pkg/kubectl/validation/schema.go

@@ -24,7 +24,7 @@ import (
 	"regexp"
 	"strings"
 
-	"github.com/emicklei/go-restful-swagger12"
+	swagger "github.com/emicklei/go-restful-swagger12"
 	ejson "github.com/exponent-io/jsonpath"
 	"github.com/golang/glog"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
@@ -33,6 +33,7 @@ import (
 	apiutil "k8s.io/kubernetes/pkg/api/util"
 )
 
+// InvalidTypeError records information about an invalid type.
 type InvalidTypeError struct {
 	ExpectedKind reflect.Kind
 	ObservedKind reflect.Kind
@@ -43,6 +44,7 @@ func (i *InvalidTypeError) Error() string {
 	return fmt.Sprintf("expected type %s, for field %s, got %s", i.ExpectedKind.String(), i.FieldName, i.ObservedKind.String())
 }
 
+// NewInvalidTypeError returns an instance of NewInvalidTypeError.
 func NewInvalidTypeError(expected reflect.Kind, observed reflect.Kind, fieldName string) error {
 	return &InvalidTypeError{expected, observed, fieldName}
 }
@@ -60,14 +62,18 @@ type Schema interface {
 	ValidateBytes(data []byte) error
 }
 
+// NullSchema always validates bytes.
 type NullSchema struct{}
 
+// ValidateBytes never fails for NullSchema.
 func (NullSchema) ValidateBytes(data []byte) error { return nil }
 
+// NoDoubleKeySchema is a schema that disallows double keys.
 type NoDoubleKeySchema struct{}
 
+// ValidateBytes validates bytes.
 func (NoDoubleKeySchema) ValidateBytes(data []byte) error {
-	var list []error = nil
+	var list []error
 	if err := validateNoDuplicateKeys(data, "metadata", "labels"); err != nil {
 		list = append(list, err)
 	}
@@ -107,17 +113,18 @@ func validateNoDuplicateKeys(data []byte, path ...string) error {
 		case ejson.KeyString:
 			if seen[string(t)] {
 				return fmt.Errorf("duplicate key: %s", string(t))
-			} else {
-				seen[string(t)] = true
 			}
+			seen[string(t)] = true
 		}
 	}
 }
 
+// ConjunctiveSchema encapsulates a schema list.
 type ConjunctiveSchema []Schema
 
+// ValidateBytes validates bytes per a ConjunctiveSchema.
 func (c ConjunctiveSchema) ValidateBytes(data []byte) error {
-	var list []error = nil
+	var list []error
 	schemas := []Schema(c)
 	for ix := range schemas {
 		if err := schemas[ix].ValidateBytes(data); err != nil {
@@ -127,11 +134,13 @@ func (c ConjunctiveSchema) ValidateBytes(data []byte) error {
 	return utilerrors.NewAggregate(list)
 }
 
+// SwaggerSchema is a schema based on an OpenAPI spec.
 type SwaggerSchema struct {
 	api      swagger.ApiDeclaration
 	delegate Schema // For delegating to other api groups
 }
 
+// NewSwaggerSchemaFromBytes creates an instance of SwaggerSchema from bytes.
 func NewSwaggerSchemaFromBytes(data []byte, factory Schema) (Schema, error) {
 	schema := &SwaggerSchema{}
 	err := json.Unmarshal(data, &schema.api)
@@ -201,6 +210,7 @@ func (s *SwaggerSchema) validateItems(items interface{}) []error {
 	return allErrs
 }
 
+// ValidateBytes validates bytes in a SwaggerSchema.
 func (s *SwaggerSchema) ValidateBytes(data []byte) error {
 	var obj interface{}
 	out, err := yaml.ToJSON(data)
@@ -240,6 +250,7 @@ func (s *SwaggerSchema) ValidateBytes(data []byte) error {
 	return utilerrors.NewAggregate(allErrs)
 }
 
+// ValidateObject returns no errors for a valid object.
 func (s *SwaggerSchema) ValidateObject(obj interface{}, fieldName, typeName string) []error {
 	allErrs := []error{}
 	models := s.api.Models
@@ -249,13 +260,13 @@ func (s *SwaggerSchema) ValidateObject(obj interface{}, fieldName, typeName stri
 	// s.api only has schema for 1 api version (the parent object type's version).
 	// e.g. an extensions/v1beta1 Template embedding a /v1 Service requires the schema for the extensions/v1beta1
 	// api to delegate to the schema for the /v1 api.
-	// Only do this for !ok objects so that cross ApiVersion vendored types take precedence.
+	// Only do this for !ok objects so that cross APIVersion vendored types take precedence.
 	if !ok && s.delegate != nil {
 		fields, mapOk := obj.(map[string]interface{})
 		if !mapOk {
 			return append(allErrs, fmt.Errorf("field %s for %s: expected object of type map[string]interface{}, but the actual type is %T", fieldName, typeName, obj))
 		}
-		if delegated, err := s.delegateIfDifferentApiVersion(&unstructured.Unstructured{Object: fields}); delegated {
+		if delegated, err := s.delegateIfDifferentAPIVersion(&unstructured.Unstructured{Object: fields}); delegated {
 			if err != nil {
 				allErrs = append(allErrs, err)
 			}
@@ -322,13 +333,13 @@ func (s *SwaggerSchema) ValidateObject(obj interface{}, fieldName, typeName stri
 	return allErrs
 }
 
-// delegateIfDifferentApiVersion delegates the validation of an object if its ApiGroup does not match the
+// delegateIfDifferentAPIVersion delegates the validation of an object if its ApiGroup does not match the
 // current SwaggerSchema.
 // First return value is true if the validation was delegated (by a different ApiGroup SwaggerSchema)
 // Second return value is the result of the delegated validation if performed.
-func (s *SwaggerSchema) delegateIfDifferentApiVersion(obj *unstructured.Unstructured) (bool, error) {
+func (s *SwaggerSchema) delegateIfDifferentAPIVersion(obj *unstructured.Unstructured) (bool, error) {
-	// Never delegate objects in the same ApiVersion or we will get infinite recursion
+	// Never delegate objects in the same APIVersion or we will get infinite recursion
-	if !s.isDifferentApiVersion(obj) {
+	if !s.isDifferentAPIVersion(obj) {
 		return false, nil
 	}
 
@@ -342,9 +353,9 @@ func (s *SwaggerSchema) delegateIfDifferentApiVersion(obj *unstructured.Unstruct
 	return true, s.delegate.ValidateBytes(m)
 }
 
-// isDifferentApiVersion Returns true if obj lives in a different ApiVersion than the SwaggerSchema does.
+// isDifferentAPIVersion Returns true if obj lives in a different APIVersion than the SwaggerSchema does.
-// The SwaggerSchema will not be able to process objects in different ApiVersions unless they are vendored.
+// The SwaggerSchema will not be able to process objects in different APIVersions unless they are vendored.
-func (s *SwaggerSchema) isDifferentApiVersion(obj *unstructured.Unstructured) bool {
+func (s *SwaggerSchema) isDifferentAPIVersion(obj *unstructured.Unstructured) bool {
 	groupVersion := obj.GetAPIVersion()
 	return len(groupVersion) > 0 && s.api.ApiVersion != groupVersion
 }

pkg/kubectl/validation/schema_test.go

@@ -42,10 +42,10 @@ func readPod(filename string) ([]byte, error) {
 }
 
 func readSwaggerFile() ([]byte, error) {
-	return readSwaggerApiFile(testapi.Default)
+	return readSwaggerAPIFile(testapi.Default)
 }
 
-func readSwaggerApiFile(group testapi.TestGroup) ([]byte, error) {
+func readSwaggerAPIFile(group testapi.TestGroup) ([]byte, error) {
 	// TODO: Figure out a better way of finding these files
 	var pathToSwaggerSpec string
 	if group.GroupVersion().Group == "" {
@@ -102,7 +102,7 @@ func loadSchemaForTest() (Schema, error) {
 }
 
 func loadSchemaForTestWithFactory(group testapi.TestGroup, factory Schema) (Schema, error) {
-	data, err := readSwaggerApiFile(group)
+	data, err := readSwaggerAPIFile(group)
 	if err != nil {
 		return nil, err
 	}
@@ -187,15 +187,15 @@ func TestValidateDifferentApiVersions(t *testing.T) {
 	}
 	err = schema.ValidateBytes(bytes)
 	if err == nil {
-		t.Error(fmt.Errorf("Expected error when validating different api version and no delegate exists."))
+		t.Error(fmt.Errorf("expected error when validating different api version and no delegate exists"))
 	}
 	f, err := NewFactory()
 	if err != nil {
-		t.Error(fmt.Errorf("Failed to create Schema factory %v.", err))
+		t.Error(fmt.Errorf("failed to create Schema factory %v", err))
 	}
 	err = f.ValidateBytes(bytes)
 	if err != nil {
-		t.Error(fmt.Errorf("Failed to validate object with multiple ApiGroups: %v.", err))
+		t.Error(fmt.Errorf("failed to validate object with multiple ApiGroups: %v", err))
 	}
 }
 
@@ -377,10 +377,12 @@ func TestValidateDuplicateLabelsPassCases(t *testing.T) {
 	}
 }
 
+// AlwaysInvalidSchema is always invalid.
 type AlwaysInvalidSchema struct{}
 
+// ValidateBytes always fails to validate.
 func (AlwaysInvalidSchema) ValidateBytes([]byte) error {
-	return fmt.Errorf("Always invalid!")
+	return fmt.Errorf("always invalid")
 }
 
 func TestConjunctiveSchema(t *testing.T) {