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‎cmd/pizza-crd-webhook/main.go

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/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"net/http"
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"os"
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"time"
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"github.com/spf13/pflag"
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"k8s.io/apiserver/pkg/server"
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"k8s.io/apiserver/pkg/server/options"
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"github.com/programming-kubernetes/pizza-crd/pkg/webhook/conversion"
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)
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func NewDefaultOptions() *Options {
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o := &Options{
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*options.NewSecureServingOptions(),
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}
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o.SecureServing.ServerCert.PairName = "pizza-crd-webhook"
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return o
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}
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type Options struct {
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SecureServing options.SecureServingOptions
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}
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type Config struct {
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SecureServing *server.SecureServingInfo
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}
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func (o *Options) AddFlags(fs *pflag.FlagSet) {
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o.SecureServing.AddFlags(fs)
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}
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func (o *Options) Config() (*Config, error) {
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if err := o.SecureServing.MaybeDefaultWithSelfSignedCerts("0.0.0.0", nil, nil); err != nil {
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return nil, err
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}
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c := &Config{}
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if err := o.SecureServing.ApplyTo(&c.SecureServing); err != nil {
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return nil, err
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}
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return c, nil
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}
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func main() {
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// parse flags
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opt := NewDefaultOptions()
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fs := pflag.NewFlagSet("pizza-crd-webhook", pflag.ExitOnError)
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opt.AddFlags(fs)
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if err := fs.Parse(os.Args); err != nil {
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panic(err)
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}
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// create runtime config
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cfg, err := opt.Config()
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if err != nil {
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panic(err)
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}
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// run server
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mux := http.NewServeMux()
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mux.Handle("/convert/pizza", http.HandlerFunc(conversion.Serve))
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if doneCh, err := cfg.SecureServing.Serve(mux, time.Second * 30, server.SetupSignalHandler()); err != nil {
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panic(err)
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} else {
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<-doneCh
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}
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}

‎glide.yaml

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package: github.com/programming-kubernetes/pizza-crd
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import:
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- package: k8s.io/apiserver
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version: kubernetes-1.14.1
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- package: k8s.io/client-go
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version: kubernetes-1.14.1
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- package: k8s.io/code-generator
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version: kubernetes-1.14.1
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- package: k8s.io/apiextensions-apiserver
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version: kubernetes-1.14.1
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# pin gonum because the old redirect gonum.org/v1/gonum is broken
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- package: gonum.org/v1/gonum
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version: 5d695651a1d533b5b371458b6da17b45c17ed718
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repo: https://github.com/gonum/gonum.git

‎hack/boilerplate.go.txt

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/*
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Copyright The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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‎hack/custom-boilerplate.go.txt

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/*
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Copyright YEAR The Kubernetes custom-apiserver Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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‎hack/tools.go

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// +build tools
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/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
13+
distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// This package imports things required by build scripts, to force `go mod` to see them as dependencies
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package tools
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import (
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_ "k8s.io/code-generator"
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_ "k8s.io/code-generator/cmd/client-gen"
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_ "k8s.io/code-generator/cmd/conversion-gen"
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_ "k8s.io/code-generator/cmd/deepcopy-gen"
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_ "k8s.io/code-generator/cmd/defaulter-gen"
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_ "k8s.io/code-generator/cmd/go-to-protobuf"
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_ "k8s.io/code-generator/cmd/informer-gen"
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_ "k8s.io/code-generator/cmd/lister-gen"
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_ "k8s.io/code-generator/cmd/register-gen"
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)

‎hack/update-codegen.sh

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#!/usr/bin/env bash
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# Copyright 2017 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -o errexit
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set -o nounset
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set -o pipefail
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SCRIPT_ROOT=$(dirname ${BASH_SOURCE})/..
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CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${SCRIPT_ROOT}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
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# generate the code with:
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# --output-base because this script should also be able to run inside the vendor dir of
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# k8s.io/kubernetes. The output-base is needed for the generators to output into the vendor dir
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# instead of the $GOPATH directly. For normal projects this can be dropped.
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bash ${CODEGEN_PKG}/generate-groups.sh all \
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github.com/programming-kubernetes/pizza-crd/pkg/generated github.com/programming-kubernetes/pizza-crd/pkg/apis \
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"restaurant:v1alpha1,v1beta1" \
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--output-base "$(dirname ${BASH_SOURCE})/../../../.." \
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--go-header-file ${SCRIPT_ROOT}/hack/boilerplate.go.txt
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# To use your own boilerplate text use:
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# --go-header-file ${SCRIPT_ROOT}/hack/custom-boilerplate.go.txt

‎hack/verify-codegen.sh

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#!/usr/bin/env bash
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# Copyright 2017 The Kubernetes Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -o errexit
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set -o nounset
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set -o pipefail
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SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")/..
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SCRIPT_BASE=${SCRIPT_ROOT}/../..
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DIFFROOT="${SCRIPT_ROOT}/pkg"
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TMP_DIFFROOT="${SCRIPT_ROOT}/_tmp/pkg"
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_tmp="${SCRIPT_ROOT}/_tmp"
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cleanup() {
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rm -rf "${_tmp}"
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}
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trap "cleanup" EXIT SIGINT
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cleanup
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mkdir -p "${TMP_DIFFROOT}"
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cp -a "${DIFFROOT}"/* "${TMP_DIFFROOT}"
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"${SCRIPT_ROOT}/hack/update-codegen.sh"
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echo "diffing ${DIFFROOT} against freshly generated codegen"
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ret=0
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diff -Naupr "${DIFFROOT}" "${TMP_DIFFROOT}" || ret=$?
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cp -a "${TMP_DIFFROOT}"/* "${DIFFROOT}"
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if [[ $ret -eq 0 ]]
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then
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echo "${DIFFROOT} up to date."
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else
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echo "${DIFFROOT} is out of date. Please run hack/update-codegen.sh"
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exit 1
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fi

‎manifests/margarita-pizza.yaml

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apiVersion: restaurant.programming-kubernetes.info/v1alpha1
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kind: Pizza
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metadata:
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name: margarita
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spec:
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toppings:
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- mozzarella
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- tomato

‎manifests/pizza-crd.yaml

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apiVersion: apiextensions.k8s.io/v1beta1
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kind: CustomResourceDefinition
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metadata:
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name: pizzas.restaurant.programming-kubernetes.info
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spec:
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group: restaurant.programming-kubernetes.info
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names:
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kind: Pizza
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listKind: PizzaList
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plural: pizzas
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singular: pizza
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scope: Namespaced
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version: v1alpha1
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versions:
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- name: v1alpha1
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served: true
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storage: true
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- name: v1beta1
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served: true
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storage: false

‎pkg/apis/restaurant/install/install.go

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/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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10+
Unless required by applicable law or agreed to in writing, software
11+
distributed under the License is distributed on an "AS IS" BASIS,
12+
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13+
See the License for the specific language governing permissions and
14+
limitations under the License.
15+
*/
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package install
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import (
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"k8s.io/apimachinery/pkg/runtime"
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utilruntime "k8s.io/apimachinery/pkg/util/runtime"
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"github.com/programming-kubernetes/pizza-crd/pkg/apis/restaurant/v1alpha1"
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"github.com/programming-kubernetes/pizza-crd/pkg/apis/restaurant/v1beta1"
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)
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// Install registers the API group and adds types to a scheme
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func Install(scheme *runtime.Scheme) {
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utilruntime.Must(v1beta1.AddToScheme(scheme))
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utilruntime.Must(v1alpha1.AddToScheme(scheme))
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}

‎pkg/apis/restaurant/v1alpha1/doc.go

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/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
6+
You may obtain a copy of the License at
7+
8+
http://www.apache.org/licenses/LICENSE-2.0
9+
10+
Unless required by applicable law or agreed to in writing, software
11+
distributed under the License is distributed on an "AS IS" BASIS,
12+
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13+
See the License for the specific language governing permissions and
14+
limitations under the License.
15+
*/
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// +k8s:deepcopy-gen=package
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// +k8s:conversion-gen=github.com/programming-kubernetes/pizza-crd/pkg/apis/restaurant
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// +k8s:defaulter-gen=TypeMeta
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// +groupName=restaurant.programming-kubernetes.info
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// Package v1alpha1 is the v1alpha1 version of the API.
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package v1alpha1

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