✨ Move webhook generator

Gopkg.toml

@@ -1,16 +1,6 @@
-required = [
-    "github.com/emicklei/go-restful",
-    "github.com/go-openapi/spec",
-    "github.com/onsi/ginkgo", # for integration testing
-    "github.com/spf13/pflag",
-    "k8s.io/client-go/plugin/pkg/client/auth/gcp", # for development against gcp
-    "k8s.io/code-generator/cmd/deepcopy-gen", # for go generate
-    "sigs.k8s.io/testing_frameworks/integration", # for integration testing
-    ]
-
-[[constraint]]
-  name="sigs.k8s.io/controller-runtime"
-  version="v0.1.1"
+ignored = [
+    "sigs.k8s.io/controller-tools/testData/*",  # it's just testdata
+]
 
 [[constraint]]
   name="k8s.io/api"
@@ -24,34 +14,10 @@ required = [
   name="k8s.io/apimachinery"
   version="kubernetes-1.13.1"
 
-[[constraint]]
-  name="k8s.io/code-generator"
-  version="kubernetes-1.13.1"
-
-[[constraint]]
-  name="k8s.io/client-go"
-  version="kubernetes-1.13.1"
-
-[[constraint]]
-  name = "github.com/onsi/ginkgo"
-  version = "v1.5.0"
-
-[[constraint]]
-  name = "github.com/onsi/gomega"
-  version = "v1.4.0"
-
 [[constraint]]
   name = "github.com/spf13/afero"
   version = "v1.1.1"
 
-[[constraint]]
-  name = "gopkg.in/yaml.v2"
-  version = "v2.2.1"
-
-[[constraint]]
-  name = "github.com/emicklei/go-restful"
-  version = "v2.7.1"
-
 [[constraint]]
   name = "github.com/spf13/cobra"
   version = "v0.0.3"
@@ -60,10 +26,6 @@ required = [
   name = "github.com/spf13/pflag"
   version = "v1.0.1"
 
-[[constraint]]
-  name = "github.com/spf13/viper"
-  version = "v1.0.2"
-
 [[constraint]]
   name = "github.com/ghodss/yaml"
   version = "1.0.0"
@@ -83,3 +45,4 @@ required = [
 
 [prune]
   go-tests = true
+  unused-packages = true

cmd/controller-gen/main.go

@@ -158,6 +158,19 @@ Usage:
 				log.Fatal(err)
 			}
 			fmt.Printf("RBAC manifests generated under '%s' \n", rbacOptions.OutputDir)
+
+			o := &webhook.Options{
+				WriterOptions: webhook.WriterOptions{
+					InputDir:       filepath.Join(projectDir, "pkg"),
+					OutputDir:      filepath.Join(projectDir, "config", "webhook"),
+					PatchOutputDir: filepath.Join(projectDir, "config", "default"),
+				},
+			}
+			o.SetDefaults()
+			if err := webhook.Generate(o); err != nil {
+				log.Fatal(err)
+			}
+			fmt.Printf("webhook manifests generated under '%s' directory\n", o.OutputDir)
 		},
 	}
 	f := cmd.Flags()
@@ -167,7 +180,7 @@ Usage:
 }
 
 func newWebhookCmd() *cobra.Command {
-	o := &webhook.ManifestOptions{}
+	o := &webhook.Options{}
 	o.SetDefaults()
 
 	cmd := &cobra.Command{

pkg/crd/generator/generator_test.go

@@ -32,12 +32,13 @@ func TestGenerator(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unable to get current directory: %v", err)
 	}
+	testDataDir := filepath.Join(currDir, "..", "..", "..", "testData")
 	// in-memory file system for storing the generated CRDs
 	outFs := afero.NewMemMapFs()
 	g := &crdgenerator.Generator{
 		OutFs:     outFs,
 		OutputDir: "/tmp",
-		RootPath:  filepath.Join(currDir, "testData"),
+		RootPath:  testDataDir,
 	}
 	err = g.ValidateAndInitFields()
 	if err != nil {
@@ -54,7 +55,7 @@ func TestGenerator(t *testing.T) {
 		if err != nil {
 			t.Fatalf("reading file failed %v", err)
 		}
-		expectedContent, err := ioutil.ReadFile(filepath.Join(currDir, "testData", "config", "crds", f))
+		expectedContent, err := ioutil.ReadFile(filepath.Join(testDataDir, "config", "crds", f))
 		if err != nil {
 			t.Fatalf("reading file failed %v", err)
 		}

pkg/webhook/admission.go

@@ -0,0 +1,89 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package webhook
+
+import (
+	"errors"
+	"fmt"
+	"regexp"
+	"strings"
+
+	admissionregistrationv1beta1 "k8s.io/api/admissionregistration/v1beta1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+// admissionWebhook contains bits needed for generating a admissionWebhook Configuration
+type admissionWebhook struct {
+	// name is the name of the webhook
+	name string
+	// typ is the webhook type, i.e. mutating, validating
+	typ webhookType
+	// path is the path this webhook will serve.
+	path string
+	// rules maps to the rules field in admissionregistrationv1beta1.admissionWebhook
+	rules []admissionregistrationv1beta1.RuleWithOperations
+	// failurePolicy maps to the failurePolicy field in admissionregistrationv1beta1.admissionWebhook
+	// This optional. If not set, will be defaulted to Ignore (fail-open) by the server.
+	// More details: https://github.com/kubernetes/api/blob/f5c295feaba2cbc946f0bbb8b535fc5f6a0345ee/admissionregistration/v1beta1/types.go#L144-L147
+	failurePolicy *admissionregistrationv1beta1.FailurePolicyType
+	// namespaceSelector maps to the namespaceSelector field in admissionregistrationv1beta1.admissionWebhook
+	// This optional.
+	namespaceSelector *metav1.LabelSelector
+}
+
+func (w *admissionWebhook) setDefaults() {
+	if len(w.path) == 0 {
+		if len(w.rules) == 0 || len(w.rules[0].Resources) == 0 {
+			// can't do defaulting, skip it.
+			return
+		}
+		if w.typ == mutatingWebhook {
+			w.path = "/mutate-" + w.rules[0].Resources[0]
+		} else if w.typ == validatingWebhook {
+			w.path = "/validate-" + w.rules[0].Resources[0]
+		}
+	}
+	if len(w.name) == 0 {
+		reg := regexp.MustCompile("[^a-zA-Z0-9]+")
+		processedPath := strings.ToLower(reg.ReplaceAllString(w.path, ""))
+		w.name = processedPath + ".example.com"
+	}
+}
+
+var _ webhook = &admissionWebhook{}
+
+// GetType returns the type of the webhook.
+func (w *admissionWebhook) GetType() webhookType {
+	return w.typ
+}
+
+// Validate validates if the webhook is valid.
+func (w *admissionWebhook) Validate() error {
+	if len(w.rules) == 0 {
+		return errors.New("field rules should not be empty")
+	}
+	if len(w.name) == 0 {
+		return errors.New("field name should not be empty")
+	}
+	if w.typ != mutatingWebhook && w.typ != validatingWebhook {
+		return fmt.Errorf("unsupported Type: %v, only mutatingWebhook and validatingWebhook are supported", w.typ)
+	}
+	if len(w.path) == 0 {
+		return errors.New("field path should not be empty")
+	}
+	return nil
+}