add golangci integration to the default scaffold

docs/book/src/component-config-tutorial/testdata/project/.golangci.yml

@@ -0,0 +1,40 @@
+run:
+  deadline: 5m
+  allow-parallel-runners: true
+
+issues:
+  # don't skip warning about doc comments
+  # don't exclude the default set of lint
+  exclude-use-default: false
+  # restore some of the defaults
+  # (fill in the rest as needed)
+  exclude-rules:
+    - path: "api/*"
+      linters:
+        - lll
+    - path: "internal/*"
+      linters:
+        - dupl
+        - lll
+linters:
+  disable-all: true
+  enable:
+    - dupl
+    - errcheck
+    - exportloopref
+    - goconst
+    - gocyclo
+    - gofmt
+    - goimports
+    - gosimple
+    - govet
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - prealloc
+    - staticcheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused

docs/book/src/component-config-tutorial/testdata/project/.workflows/lint.yml

@@ -0,0 +1,24 @@
+name: Lint
+
+# Trigger the workflow on pull requests and direct pushes to any branch
+on:
+  push:
+  pull_request:
+
+jobs:
+  lint:
+    name: golangci-lint
+    runs-on: ubuntu-latest
+    # Pull requests from the same repository won't trigger this checks as they were already triggered by the push
+    if: (github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository)
+    steps:
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '~1.20'
+      - name: Clone the code
+        uses: actions/checkout@v4
+      - name: Run linter
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.54

docs/book/src/component-config-tutorial/testdata/project/Makefile

@@ -64,6 +64,21 @@ vet: ## Run go vet against code.
 test: manifests generate fmt vet envtest ## Run tests.
 	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test ./... -coverprofile cover.out
 
+GOLANGCI_LINT = $(shell pwd)/bin/golangci-lint
+golangci-lint:
+	@[ -f $(GOLANGCI_LINT) ] || { \
+	set -e ;\
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(shell dirname $(GOLANGCI_LINT)) v1.54.2 ;\
+	}
+
+.PHONY: lint
+lint: golangci-lint ## Run golangci-lint linter & yamllint
+	$(GOLANGCI_LINT) run
+
+.PHONY: lint-fix
+lint-fix: golangci-lint ## Run golangci-lint linter and perform fixes
+	$(GOLANGCI_LINT) run --fix
+
 ##@ Build
 
 .PHONY: build

docs/book/src/cronjob-tutorial/testdata/project/.golangci.yml

@@ -0,0 +1,40 @@
+run:
+  deadline: 5m
+  allow-parallel-runners: true
+
+issues:
+  # don't skip warning about doc comments
+  # don't exclude the default set of lint
+  exclude-use-default: false
+  # restore some of the defaults
+  # (fill in the rest as needed)
+  exclude-rules:
+    - path: "api/*"
+      linters:
+        - lll
+    - path: "internal/*"
+      linters:
+        - dupl
+        - lll
+linters:
+  disable-all: true
+  enable:
+    - dupl
+    - errcheck
+    - exportloopref
+    - goconst
+    - gocyclo
+    - gofmt
+    - goimports
+    - gosimple
+    - govet
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - prealloc
+    - staticcheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused

docs/book/src/cronjob-tutorial/testdata/project/.workflows/lint.yml

@@ -0,0 +1,24 @@
+name: Lint
+
+# Trigger the workflow on pull requests and direct pushes to any branch
+on:
+  push:
+  pull_request:
+
+jobs:
+  lint:
+    name: golangci-lint
+    runs-on: ubuntu-latest
+    # Pull requests from the same repository won't trigger this checks as they were already triggered by the push
+    if: (github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository)
+    steps:
+      - name: Setup Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '~1.20'
+      - name: Clone the code
+        uses: actions/checkout@v4
+      - name: Run linter
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.54

docs/book/src/cronjob-tutorial/testdata/project/Makefile

@@ -64,6 +64,21 @@ vet: ## Run go vet against code.
 test: manifests generate fmt vet envtest ## Run tests.
 	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test ./... -coverprofile cover.out
 
+GOLANGCI_LINT = $(shell pwd)/bin/golangci-lint
+golangci-lint:
+	@[ -f $(GOLANGCI_LINT) ] || { \
+	set -e ;\
+	curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(shell dirname $(GOLANGCI_LINT)) v1.54.2 ;\
+	}
+
+.PHONY: lint
+lint: golangci-lint ## Run golangci-lint linter & yamllint
+	$(GOLANGCI_LINT) run
+
+.PHONY: lint-fix
+lint-fix: golangci-lint ## Run golangci-lint linter and perform fixes
+	$(GOLANGCI_LINT) run --fix
+
 ##@ Build
 
 .PHONY: build

docs/book/src/cronjob-tutorial/testdata/project/api/v1/cronjob_webhook.go

@@ -42,6 +42,7 @@ var cronjoblog = logf.Log.WithName("cronjob-resource")
 Then, we set up the webhook with the manager.
 */
 
+// SetupWebhookWithManager will setup the manager to manage the webhooks
 func (r *CronJob) SetupWebhookWithManager(mgr ctrl.Manager) error {
 	return ctrl.NewWebhookManagedBy(mgr).
 		For(r).

docs/book/src/cronjob-tutorial/testdata/project/api/v1/webhook_suite_test.go

@@ -132,8 +132,7 @@ var _ = BeforeSuite(func() {
 		if err != nil {
 			return err
 		}
-		conn.Close()
-		return nil
+		return conn.Close()
 	}).Should(Succeed())
 
 })

pkg/plugins/golang/deploy-image/v1alpha1/scaffolds/internal/templates/controllers/controller-test.go

@@ -81,6 +81,7 @@ import (
 	"time"
 	"fmt"
 
+	//nolint:golint
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
 	appsv1 "k8s.io/api/apps/v1"
@@ -109,7 +110,10 @@ var _ = Describe("{{ .Resource.Kind }} controller", func() {
 			},
 		}
 
-		typeNamespaceName := types.NamespacedName{Name: {{ .Resource.Kind }}Name, Namespace: {{ .Resource.Kind }}Name}
+		typeNamespaceName := types.NamespacedName{
+			Name:      {{ .Resource.Kind }}Name,
+			Namespace: {{ .Resource.Kind }}Name,
+		}
 		{{ lower .Resource.Kind }} := &{{ .Resource.ImportAlias }}.{{ .Resource.Kind }}{}
 
 		BeforeEach(func() {
@@ -190,13 +194,20 @@ var _ = Describe("{{ .Resource.Kind }} controller", func() {
 
 			By("Checking the latest Status Condition added to the {{ .Resource.Kind }} instance")
 			Eventually(func() error {
-				if {{ lower .Resource.Kind }}.Status.Conditions != nil && len({{ lower .Resource.Kind }}.Status.Conditions) != 0 {
+				if {{ lower .Resource.Kind }}.Status.Conditions != nil &&
+					len({{ lower .Resource.Kind }}.Status.Conditions) != 0 {
 					latestStatusCondition := {{ lower .Resource.Kind }}.Status.Conditions[len({{ lower .Resource.Kind }}.Status.Conditions)-1]
-					expectedLatestStatusCondition := metav1.Condition{Type: typeAvailable{{ .Resource.Kind }},
-						Status: metav1.ConditionTrue, Reason: "Reconciling",
-						Message: fmt.Sprintf("Deployment for custom resource (%s) with %d replicas created successfully", {{ lower .Resource.Kind }}.Name, {{ lower .Resource.Kind }}.Spec.Size)}
+					expectedLatestStatusCondition := metav1.Condition{
+						Type:    typeAvailable{{ .Resource.Kind }},
+						Status:  metav1.ConditionTrue,
+						Reason:  "Reconciling",
+						Message: fmt.Sprintf(
+							"Deployment for custom resource (%s) with %d replicas created successfully", 
+							{{ lower .Resource.Kind }}.Name,
+							{{ lower .Resource.Kind }}.Spec.Size),
+					}
 					if latestStatusCondition != expectedLatestStatusCondition {
-						return fmt.Errorf("The latest status condition added to the {{ lower .Resource.Kind }} instance is not as expected")
+						return fmt.Errorf("The latest status condition added to the {{ .Resource.Kind }} instance is not as expected")
 					}
 				}
 				return nil

pkg/plugins/golang/deploy-image/v1alpha1/scaffolds/internal/templates/controllers/controller.go

@@ -137,7 +137,6 @@ type {{ .Resource.Kind }}Reconciler struct {
 
 // Reconcile is part of the main kubernetes reconciliation loop which aims to
 // move the current state of the cluster closer to the desired state.
-
 // It is essential for the controller's reconciliation loop to be idempotent. By following the Operator 
 // pattern you will create Controllers which provide a reconcile function
 // responsible for synchronizing resources until the desired state is reached on the cluster. 

pkg/plugins/golang/v4/scaffolds/init.go

@@ -139,5 +139,7 @@ func (s *initScaffolder) Scaffold() error {
 		&templates.Dockerfile{},
 		&templates.DockerIgnore{},
 		&templates.Readme{},
+		&templates.Golangci{},
+		&templates.GolangciGHAction{},
 	)
 }

pkg/plugins/golang/v4/scaffolds/internal/templates/api/webhook.go

@@ -98,6 +98,7 @@ import (
 // log is for logging in this package.
 var {{ lower .Resource.Kind }}log = logf.Log.WithName("{{ lower .Resource.Kind }}-resource")
 
+// SetupWebhookWithManager will setup the manager to manage the webhooks
 func (r *{{ .Resource.Kind }}) SetupWebhookWithManager(mgr ctrl.Manager) error {
 	return ctrl.NewWebhookManagedBy(mgr).
 		For(r).

pkg/plugins/golang/v4/scaffolds/internal/templates/api/webhook_suitetest.go

@@ -249,8 +249,7 @@ var _ = BeforeSuite(func() {
 		if err != nil {
 			return err
 		}
-		conn.Close()
-		return nil
+		return conn.Close();
 	}).Should(Succeed())
 
 })

pkg/plugins/golang/v4/scaffolds/internal/templates/golangci.go

@@ -0,0 +1,85 @@
+/*
+Copyright 2022 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 templates
+
+import (
+	"sigs.k8s.io/kubebuilder/v3/pkg/machinery"
+)
+
+var _ machinery.Template = &Golangci{}
+
+// Golangci scaffolds a file which define Golangci rules
+type Golangci struct {
+	machinery.TemplateMixin
+	machinery.ProjectNameMixin
+}
+
+// SetTemplateDefaults implements file.Template
+func (f *Golangci) SetTemplateDefaults() error {
+	if f.Path == "" {
+		f.Path = ".golangci.yml"
+	}
+
+	f.TemplateBody = golangciTemplate
+
+	f.IfExistsAction = machinery.SkipFile
+
+	return nil
+}
+
+//nolint:lll
+const golangciTemplate = `run:
+  deadline: 5m
+  allow-parallel-runners: true
+
+issues:
+  # don't skip warning about doc comments
+  # don't exclude the default set of lint
+  exclude-use-default: false
+  # restore some of the defaults
+  # (fill in the rest as needed)
+  exclude-rules:
+    - path: "api/*"
+      linters:
+        - lll
+    - path: "internal/*"
+      linters:
+        - dupl
+        - lll
+linters:
+  disable-all: true
+  enable:
+    - dupl
+    - errcheck
+    - exportloopref
+    - goconst
+    - gocyclo
+    - gofmt
+    - goimports
+    - gosimple
+    - govet
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - prealloc
+    - staticcheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+`