added support for multiple kubernetes openapi schemas

kyaml/openapi/scripts/fetchSchemaFromCluster.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+# Copyright 2020 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+MYGOBIN=$(go env GOPATH)/bin
+VERSION=$1
+
+cp $HOME/.kube/config /tmp/kubeconfig.txt | true
+$MYGOBIN/kind create cluster --image kindest/node:$VERSION --name=getopenapidata
+$MYGOBIN/kpt live  fetch-k8s-schema  --pretty-print > /tmp/new_swagger.json
+$MYGOBIN/kind delete cluster --name=getopenapidata
+cp /tmp/kubeconfig.txt $HOME/.kube/config | true
+mkdir -p kubernetesapi/"${VERSION//.}"
+cp /tmp/new_swagger.json kubernetesapi/"${VERSION//.}"/swagger.json

kyaml/openapi/scripts/generateSwaggerDotGo.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+# Copyright 2020 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+MYGOBIN=$(go env GOPATH)/bin
+VERSION=$1
+
+$MYGOBIN/go-bindata \
+  --pkg "${VERSION//.}" \
+  -o kubernetesapi/"${VERSION//.}"/swagger.go \
+  kubernetesapi/"${VERSION//.}"/swagger.json

kyaml/openapi/scripts/makeOpenApiInfoDotGo.sh

@@ -0,0 +1,84 @@
+#!/bin/bash
+# Copyright 2020 The Kubernetes Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+# This will read from the directory kubernetesapi
+# and use subdirectory names to generate
+# kubernetesapi/openapiinfo.go
+#
+# This script should only be run after the
+# swagger.json and swagger.go files are generated.
+
+set -e
+
+if ! command -v jq &> /dev/null ; then
+    echo Please install jq
+    echo on ubuntu: sudo apt-get install jq
+    exit 1
+fi
+
+info_list=()
+version_list=()
+
+V=`ls kubernetesapi | grep v.*`
+for VERSION in $V
+do
+  openapiinfo=$(\
+    jq -r '.info' kubernetesapi/$VERSION/swagger.json  | \
+    sed 's/[\" *]//g' | \
+    tr -d '\n' )
+  info_list+=( $openapiinfo )
+  version_list+=( ${VERSION} )
+done
+
+
+# add imports to openapiinfo.go
+cat <<EOF >kubernetesapi/openapiinfo.go
+// Copyright 2020 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+// Code generated by $0; DO NOT EDIT.
+
+package kubernetesapi
+
+import (
+EOF
+
+for version in ${version_list[@]}
+do
+  cat <<EOF >>kubernetesapi/openapiinfo.go
+  "sigs.k8s.io/kustomize/kyaml/openapi/kubernetesapi/$version"
+EOF
+done
+
+# add info string for `kustomize openapi info` command
+OPEN_API_INFO=`echo ${info_list[@]} | tr " " ","`
+cat <<EOF >>kubernetesapi/openapiinfo.go
+)
+
+const Info = "$OPEN_API_INFO"
+EOF
+
+# add map for `initSchema` in openapi.go to use
+cat <<EOF >>kubernetesapi/openapiinfo.go
+
+var OpenApiMustAsset = map[string]func(string)[]byte{
+EOF
+
+latest=""
+for version in ${version_list[@]}
+do
+  latest=$version
+  cat <<EOF >>kubernetesapi/openapiinfo.go
+  "$version": $version.MustAsset,
+EOF
+done
+
+# add latest version to be used as a default
+cat <<EOF >>kubernetesapi/openapiinfo.go
+}
+
+const DefaultOpenApi = "$latest"
+EOF
+
+