added a hidden openapi info command

kustomize/go.mod

@@ -10,6 +10,7 @@ require (
 	k8s.io/client-go v0.17.3
 	sigs.k8s.io/kustomize/api v0.6.3
 	sigs.k8s.io/kustomize/cmd/config v0.8.2
+	sigs.k8s.io/kustomize/kyaml v0.9.2
 	sigs.k8s.io/yaml v1.2.0
 )
 
@@ -19,6 +20,8 @@ exclude (
 	sigs.k8s.io/kustomize/cmd/config v0.2.0
 )
 
-replace sigs.k8s.io/kustomize/api v0.6.3 => ../api
-
-replace sigs.k8s.io/kustomize/cmd/config v0.8.2 => ../cmd/config
+replace (
+	sigs.k8s.io/kustomize/api v0.6.3 => ../api
+	sigs.k8s.io/kustomize/cmd/config v0.8.2 => ../cmd/config
+	sigs.k8s.io/kustomize/kyaml v0.9.2 => ../kyaml
+)

kustomize/internal/commands/commands.go

@@ -19,6 +19,7 @@ import (
 	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/build"
 	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/create"
 	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/edit"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/openapi"
 	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/version"
 )
 
@@ -43,6 +44,7 @@ See https://sigs.k8s.io/kustomize
 		edit.NewCmdEdit(fSys, v, uf),
 		create.NewCmdCreate(fSys, uf),
 		version.NewCmdVersion(stdOut),
+		openapi.NewCmdOpenAPI(stdOut),
 	)
 	configcobra.AddCommands(c, "kustomize")
 

kustomize/internal/commands/openapi/info/info.go

@@ -0,0 +1,28 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package info
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/kyaml/openapi/kubernetesapi"
+)
+
+// NewCmdInfo makes a new info command.
+func NewCmdInfo(w io.Writer) *cobra.Command {
+
+	infoCmd := cobra.Command{
+		Use:     "info",
+		Short:   "Prints the `info` field from the kubernetes OpenAPI data",
+		Example: `kustomize openapi info`,
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Fprintln(w, kubernetesapi.Info)
+		},
+		Hidden: true,
+	}
+
+	return &infoCmd
+}

kustomize/internal/commands/openapi/openapi.go

@@ -0,0 +1,27 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package openapi
+
+import (
+	"io"
+
+	"github.com/spf13/cobra"
+	"sigs.k8s.io/kustomize/cmd/config/configcobra"
+	"sigs.k8s.io/kustomize/kustomize/v3/internal/commands/openapi/info"
+)
+
+// NewCmdOpenAPI makes a new openapi command.
+func NewCmdOpenAPI(w io.Writer) *cobra.Command {
+
+	openApiCmd := &cobra.Command{
+		Use:     "openapi",
+		Short:   "Commands for interacting with the OpenAPI data",
+		Example: `kustomize openapi info`,
+	}
+
+	openApiCmd.AddCommand(info.NewCmdInfo(w))
+	configcobra.AddCommands(openApiCmd, "openapi")
+
+	return openApiCmd
+}

kyaml/Makefile

@@ -36,9 +36,7 @@ vet:
 	go vet ./...
 
 openapi:
-	(which $(GOPATH)/bin/go-bindata || go get -u github.com/go-bindata/go-bindata/...)
-	$(GOPATH)/bin/go-bindata --pkg kubernetesapi -o openapi/kubernetesapi/swagger.go openapi/kubernetesapi/swagger.json
-	$(GOPATH)/bin/go-bindata --pkg kustomizationapi -o openapi/kustomizationapi/swagger.go openapi/kustomizationapi/swagger.json
+	./hack/fetchOpenApiData.sh
 
 $(MYGOBIN)/kind:
 	( \

kyaml/hack/fetchOpenApiData.sh

@@ -0,0 +1,14 @@
+if ! command -v jq &> /dev/null ; then
+    echo Please install jq
+    echo on ubuntu: sudo apt-get install jq
+    exit 1
+fi
+
+GOPATH=$(go env GOPATH)
+
+OPENAPIINFO=$(jq -r '.info' openapi/kubernetesapi/swagger.json | sed 's/[\" *]//g' | tr -d '\n')
+sed -i "s/Info = \".*\"/Info = \"$OPENAPIINFO\"/g" 'openapi/kubernetesapi/openapiinfo.go'
+
+(go get -u github.com/go-bindata/go-bindata/...)
+$GOPATH/bin/go-bindata --pkg kubernetesapi -o openapi/kubernetesapi/swagger.go openapi/kubernetesapi/swagger.json
+$GOPATH/bin/go-bindata --pkg kustomizationapi -o openapi/kustomizationapi/swagger.go openapi/kustomizationapi/swagger.json

kyaml/openapi/kubernetesapi/openapiinfo.go

@@ -0,0 +1,8 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package kubernetesapi
+
+const Info = "{ title:Kubernetes, version:v1.17.0 }"
+
+

releasing/README.md

@@ -30,8 +30,14 @@ The dependencies determine the release order:
 Thus, do `kyaml` first, then `cli-utils`, etc.
 
 #### Consider fetching new OpenAPI data
-The Kubernetes OpenAPI data changes no more frequently than once per quarter. Instructions 
-on how to get a new OpenAPI sample can be found in the
+The Kubernetes OpenAPI data changes no more frequently than once per quarter. 
+You can check the current version that kustomize is using with the
+following command. 
+```
+kustomize openapi info
+```
+
+Instructions on how to get a new OpenAPI sample can be found in the
 [OpenAPI Readme].
 
 #### Establish clean state