feat: Automate ENVTEST version from go.mod

Remove the need to manually bump release branches in the Makefile by deriving the ENVTEST version directly from Kubernetes versions specified in go.mod.

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

@@ -1,7 +1,5 @@
 # Image URL to use all building/pushing image targets
 IMG ?= controller:latest
-# ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
-ENVTEST_K8S_VERSION = 1.31.0
 
 # Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
 ifeq (,$(shell go env GOBIN))
@@ -64,7 +62,7 @@ vet: ## Run go vet against code.
 	go vet ./...
 
 .PHONY: test
-test: manifests generate fmt vet envtest ## Run tests.
+test: manifests generate fmt vet setup-envtest ## Run tests.
 	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $$(go list ./... | grep -v /e2e) -coverprofile cover.out
 
 # TODO(user): To use a different vendor for e2e tests, modify the setup under 'tests/e2e'.
@@ -176,7 +174,8 @@ GOLANGCI_LINT = $(LOCALBIN)/golangci-lint
 ## Tool Versions
 KUSTOMIZE_VERSION ?= v5.5.0
 CONTROLLER_TOOLS_VERSION ?= v0.16.5
-ENVTEST_VERSION ?= release-0.19
+ENVTEST_VERSION ?= $(shell go list -m -f "{{ .Version }}" sigs.k8s.io/controller-runtime | awk -F'[v.]' '{printf "release-%d.%d", $$2, $$3}')
+ENVTEST_K8S_VERSION = 1.31.0 #specifies the version of Kubernetes binaries to be downloaded by the envtest setup binary.
 GOLANGCI_LINT_VERSION ?= v1.61.0
 
 .PHONY: kustomize
@@ -189,6 +188,14 @@ controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessar
 $(CONTROLLER_GEN): $(LOCALBIN)
 	$(call go-install-tool,$(CONTROLLER_GEN),sigs.k8s.io/controller-tools/cmd/controller-gen,$(CONTROLLER_TOOLS_VERSION))
 
+.PHONY: setup-envtest
+setup-envtest: envtest ## Download the binaries required for ENVTEST in the local bin directory.
+	@echo "Setting up envtest binaries for Kubernetes version $(ENVTEST_K8S_VERSION)..."
+	@$(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path || { \
+		echo "Error: Failed to set up envtest binaries for version $(ENVTEST_K8S_VERSION)."; \
+		exit 1; \
+	}
+
 .PHONY: envtest
 envtest: $(ENVTEST) ## Download setup-envtest locally if necessary.
 $(ENVTEST): $(LOCALBIN)

docs/book/src/cronjob-tutorial/testdata/project/internal/controller/suite_test.go

@@ -27,9 +27,8 @@ package controller
 
 import (
 	"context"
-	"fmt"
+	"os"
 	"path/filepath"
-	"runtime"
 	"testing"
 
 	ctrl "sigs.k8s.io/controller-runtime"
@@ -83,19 +82,16 @@ var _ = BeforeSuite(func() {
 	testEnv = &envtest.Environment{
 		CRDDirectoryPaths:     []string{filepath.Join("..", "..", "config", "crd", "bases")},
 		ErrorIfCRDPathMissing: true,
-
-		// The BinaryAssetsDirectory is only required if you want to run the tests directly
-		// without call the makefile target test. If not informed it will look for the
-		// default path defined in controller-runtime which is /usr/local/kubebuilder/.
-		// Note that you must have the required binaries setup under the bin directory to perform
-		// the tests directly. When we run make test it will be setup and used automatically.
-		BinaryAssetsDirectory: filepath.Join("..", "..", "bin", "k8s",
-			fmt.Sprintf("1.31.0-%s-%s", runtime.GOOS, runtime.GOARCH)),
 	}
 
+	// Retrieve the first found binary directory to allow running tests from IDEs
+	if getFirstFoundEnvTestBinaryDir() != "" {
+		testEnv.BinaryAssetsDirectory = getFirstFoundEnvTestBinaryDir()
+	}
 	/*
 		Then, we start the envtest cluster.
 	*/
+
 	var err error
 	// cfg is defined in this file globally.
 	cfg, err = testEnv.Start()
@@ -178,3 +174,26 @@ var _ = AfterSuite(func() {
 /*
 Now that you have your controller running on a test cluster and a client ready to perform operations on your CronJob, we can start writing integration tests!
 */
+
+// getFirstFoundEnvTestBinaryDir locates the first binary in the specified path.
+// ENVTEST-based tests depend on specific binaries, usually located in paths set by
+// controller-runtime. When running tests directly (e.g., via an IDE) without using
+// Makefile targets, the 'BinaryAssetsDirectory' must be explicitly configured.
+//
+// This function streamlines the process by finding the required binaries, similar to
+// setting the 'KUBEBUILDER_ASSETS' environment variable. To ensure the binaries are
+// properly set up, run 'make setup-envtest' beforehand.
+func getFirstFoundEnvTestBinaryDir() string {
+	basePath := filepath.Join("..", "..", "bin", "k8s")
+	entries, err := os.ReadDir(basePath)
+	if err != nil {
+		logf.Log.Error(err, "Failed to read directory", "path", basePath)
+		return ""
+	}
+	for _, entry := range entries {
+		if entry.IsDir() {
+			return filepath.Join(basePath, entry.Name())
+		}
+	}
+	return ""
+}

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

@@ -21,8 +21,8 @@ import (
 	"crypto/tls"
 	"fmt"
 	"net"
+	"os"
 	"path/filepath"
-	"runtime"
 	"testing"
 	"time"
 
@@ -72,19 +72,16 @@ var _ = BeforeSuite(func() {
 		CRDDirectoryPaths:     []string{filepath.Join("..", "..", "..", "config", "crd", "bases")},
 		ErrorIfCRDPathMissing: false,
 
-		// The BinaryAssetsDirectory is only required if you want to run the tests directly
-		// without call the makefile target test. If not informed it will look for the
-		// default path defined in controller-runtime which is /usr/local/kubebuilder/.
-		// Note that you must have the required binaries setup under the bin directory to perform
-		// the tests directly. When we run make test it will be setup and used automatically.
-		BinaryAssetsDirectory: filepath.Join("..", "..", "..", "bin", "k8s",
-			fmt.Sprintf("1.31.0-%s-%s", runtime.GOOS, runtime.GOARCH)),
-
 		WebhookInstallOptions: envtest.WebhookInstallOptions{
 			Paths: []string{filepath.Join("..", "..", "..", "config", "webhook")},
 		},
 	}
 
+	// Retrieve the first found binary directory to allow running tests from IDEs
+	if getFirstFoundEnvTestBinaryDir() != "" {
+		testEnv.BinaryAssetsDirectory = getFirstFoundEnvTestBinaryDir()
+	}
+
 	var err error
 	// cfg is defined in this file globally.
 	cfg, err = testEnv.Start()
@@ -148,3 +145,26 @@ var _ = AfterSuite(func() {
 	err := testEnv.Stop()
 	Expect(err).NotTo(HaveOccurred())
 })
+
+// getFirstFoundEnvTestBinaryDir locates the first binary in the specified path.
+// ENVTEST-based tests depend on specific binaries, usually located in paths set by
+// controller-runtime. When running tests directly (e.g., via an IDE) without using
+// Makefile targets, the 'BinaryAssetsDirectory' must be explicitly configured.
+//
+// This function streamlines the process by finding the required binaries, similar to
+// setting the 'KUBEBUILDER_ASSETS' environment variable. To ensure the binaries are
+// properly set up, run 'make setup-envtest' beforehand.
+func getFirstFoundEnvTestBinaryDir() string {
+	basePath := filepath.Join("..", "..", "..", "bin", "k8s")
+	entries, err := os.ReadDir(basePath)
+	if err != nil {
+		logf.Log.Error(err, "Failed to read directory", "path", basePath)
+		return ""
+	}
+	for _, entry := range entries {
+		if entry.IsDir() {
+			return filepath.Join(basePath, entry.Name())
+		}
+	}
+	return ""
+}

docs/book/src/getting-started/testdata/project/Makefile

@@ -1,7 +1,5 @@
 # Image URL to use all building/pushing image targets
 IMG ?= controller:latest
-# ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
-ENVTEST_K8S_VERSION = 1.31.0
 
 # Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
 ifeq (,$(shell go env GOBIN))
@@ -60,7 +58,7 @@ vet: ## Run go vet against code.
 	go vet ./...
 
 .PHONY: test
-test: manifests generate fmt vet envtest ## Run tests.
+test: manifests generate fmt vet setup-envtest ## Run tests.
 	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $$(go list ./... | grep -v /e2e) -coverprofile cover.out
 
 # TODO(user): To use a different vendor for e2e tests, modify the setup under 'tests/e2e'.
@@ -172,7 +170,8 @@ GOLANGCI_LINT = $(LOCALBIN)/golangci-lint
 ## Tool Versions
 KUSTOMIZE_VERSION ?= v5.5.0
 CONTROLLER_TOOLS_VERSION ?= v0.16.5
-ENVTEST_VERSION ?= release-0.19
+ENVTEST_VERSION ?= $(shell go list -m -f "{{ .Version }}" sigs.k8s.io/controller-runtime | awk -F'[v.]' '{printf "release-%d.%d", $$2, $$3}')
+ENVTEST_K8S_VERSION = 1.31.0 #specifies the version of Kubernetes binaries to be downloaded by the envtest setup binary.
 GOLANGCI_LINT_VERSION ?= v1.61.0
 
 .PHONY: kustomize
@@ -185,6 +184,14 @@ controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessar
 $(CONTROLLER_GEN): $(LOCALBIN)
 	$(call go-install-tool,$(CONTROLLER_GEN),sigs.k8s.io/controller-tools/cmd/controller-gen,$(CONTROLLER_TOOLS_VERSION))
 
+.PHONY: setup-envtest
+setup-envtest: envtest ## Download the binaries required for ENVTEST in the local bin directory.
+	@echo "Setting up envtest binaries for Kubernetes version $(ENVTEST_K8S_VERSION)..."
+	@$(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path || { \
+		echo "Error: Failed to set up envtest binaries for version $(ENVTEST_K8S_VERSION)."; \
+		exit 1; \
+	}
+
 .PHONY: envtest
 envtest: $(ENVTEST) ## Download setup-envtest locally if necessary.
 $(ENVTEST): $(LOCALBIN)

docs/book/src/getting-started/testdata/project/internal/controller/suite_test.go

@@ -18,9 +18,8 @@ package controller
 
 import (
 	"context"
-	"fmt"
+	"os"
 	"path/filepath"
-	"runtime"
 	"testing"
 
 	. "github.com/onsi/ginkgo/v2"
@@ -61,14 +60,11 @@ var _ = BeforeSuite(func() {
 	testEnv = &envtest.Environment{
 		CRDDirectoryPaths:     []string{filepath.Join("..", "..", "config", "crd", "bases")},
 		ErrorIfCRDPathMissing: true,
+	}
 
-		// The BinaryAssetsDirectory is only required if you want to run the tests directly
-		// without call the makefile target test. If not informed it will look for the
-		// default path defined in controller-runtime which is /usr/local/kubebuilder/.
-		// Note that you must have the required binaries setup under the bin directory to perform
-		// the tests directly. When we run make test it will be setup and used automatically.
-		BinaryAssetsDirectory: filepath.Join("..", "..", "bin", "k8s",
-			fmt.Sprintf("1.31.0-%s-%s", runtime.GOOS, runtime.GOARCH)),
+	// Retrieve the first found binary directory to allow running tests from IDEs
+	if getFirstFoundEnvTestBinaryDir() != "" {
+		testEnv.BinaryAssetsDirectory = getFirstFoundEnvTestBinaryDir()
 	}
 
 	var err error
@@ -94,3 +90,26 @@ var _ = AfterSuite(func() {
 	err := testEnv.Stop()
 	Expect(err).NotTo(HaveOccurred())
 })
+
+// getFirstFoundEnvTestBinaryDir locates the first binary in the specified path.
+// ENVTEST-based tests depend on specific binaries, usually located in paths set by
+// controller-runtime. When running tests directly (e.g., via an IDE) without using
+// Makefile targets, the 'BinaryAssetsDirectory' must be explicitly configured.
+//
+// This function streamlines the process by finding the required binaries, similar to
+// setting the 'KUBEBUILDER_ASSETS' environment variable. To ensure the binaries are
+// properly set up, run 'make setup-envtest' beforehand.
+func getFirstFoundEnvTestBinaryDir() string {
+	basePath := filepath.Join("..", "..", "bin", "k8s")
+	entries, err := os.ReadDir(basePath)
+	if err != nil {
+		logf.Log.Error(err, "Failed to read directory", "path", basePath)
+		return ""
+	}
+	for _, entry := range entries {
+		if entry.IsDir() {
+			return filepath.Join(basePath, entry.Name())
+		}
+	}
+	return ""
+}

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

@@ -1,7 +1,5 @@
 # Image URL to use all building/pushing image targets
 IMG ?= controller:latest
-# ENVTEST_K8S_VERSION refers to the version of kubebuilder assets to be downloaded by envtest binary.
-ENVTEST_K8S_VERSION = 1.31.0
 
 # Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
 ifeq (,$(shell go env GOBIN))
@@ -64,7 +62,7 @@ vet: ## Run go vet against code.
 	go vet ./...
 
 .PHONY: test
-test: manifests generate fmt vet envtest ## Run tests.
+test: manifests generate fmt vet setup-envtest ## Run tests.
 	KUBEBUILDER_ASSETS="$(shell $(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path)" go test $$(go list ./... | grep -v /e2e) -coverprofile cover.out
 
 # TODO(user): To use a different vendor for e2e tests, modify the setup under 'tests/e2e'.
@@ -176,7 +174,8 @@ GOLANGCI_LINT = $(LOCALBIN)/golangci-lint
 ## Tool Versions
 KUSTOMIZE_VERSION ?= v5.5.0
 CONTROLLER_TOOLS_VERSION ?= v0.16.5
-ENVTEST_VERSION ?= release-0.19
+ENVTEST_VERSION ?= $(shell go list -m -f "{{ .Version }}" sigs.k8s.io/controller-runtime | awk -F'[v.]' '{printf "release-%d.%d", $$2, $$3}')
+ENVTEST_K8S_VERSION = 1.31.0 #specifies the version of Kubernetes binaries to be downloaded by the envtest setup binary.
 GOLANGCI_LINT_VERSION ?= v1.61.0
 
 .PHONY: kustomize
@@ -189,6 +188,14 @@ controller-gen: $(CONTROLLER_GEN) ## Download controller-gen locally if necessar
 $(CONTROLLER_GEN): $(LOCALBIN)
 	$(call go-install-tool,$(CONTROLLER_GEN),sigs.k8s.io/controller-tools/cmd/controller-gen,$(CONTROLLER_TOOLS_VERSION))
 
+.PHONY: setup-envtest
+setup-envtest: envtest ## Download the binaries required for ENVTEST in the local bin directory.
+	@echo "Setting up envtest binaries for Kubernetes version $(ENVTEST_K8S_VERSION)..."
+	@$(ENVTEST) use $(ENVTEST_K8S_VERSION) --bin-dir $(LOCALBIN) -p path || { \
+		echo "Error: Failed to set up envtest binaries for version $(ENVTEST_K8S_VERSION)."; \
+		exit 1; \
+	}
+
 .PHONY: envtest
 envtest: $(ENVTEST) ## Download setup-envtest locally if necessary.
 $(ENVTEST): $(LOCALBIN)

docs/book/src/multiversion-tutorial/testdata/project/internal/controller/suite_test.go

@@ -26,9 +26,8 @@ package controller
 
 import (
 	"context"
-	"fmt"
+	"os"
 	"path/filepath"
-	"runtime"
 	"testing"
 
 	ctrl "sigs.k8s.io/controller-runtime"
@@ -82,19 +81,16 @@ var _ = BeforeSuite(func() {
 	testEnv = &envtest.Environment{
 		CRDDirectoryPaths:     []string{filepath.Join("..", "..", "config", "crd", "bases")},
 		ErrorIfCRDPathMissing: true,
-
-		// The BinaryAssetsDirectory is only required if you want to run the tests directly
-		// without call the makefile target test. If not informed it will look for the
-		// default path defined in controller-runtime which is /usr/local/kubebuilder/.
-		// Note that you must have the required binaries setup under the bin directory to perform
-		// the tests directly. When we run make test it will be setup and used automatically.
-		BinaryAssetsDirectory: filepath.Join("..", "..", "bin", "k8s",
-			fmt.Sprintf("1.31.0-%s-%s", runtime.GOOS, runtime.GOARCH)),
 	}
 
+	// Retrieve the first found binary directory to allow running tests from IDEs
+	if getFirstFoundEnvTestBinaryDir() != "" {
+		testEnv.BinaryAssetsDirectory = getFirstFoundEnvTestBinaryDir()
+	}
 	/*
 		Then, we start the envtest cluster.
 	*/
+
 	var err error
 	// cfg is defined in this file globally.
 	cfg, err = testEnv.Start()
@@ -177,3 +173,26 @@ var _ = AfterSuite(func() {
 /*
 Now that you have your controller running on a test cluster and a client ready to perform operations on your CronJob, we can start writing integration tests!
 */
+
+// getFirstFoundEnvTestBinaryDir locates the first binary in the specified path.
+// ENVTEST-based tests depend on specific binaries, usually located in paths set by
+// controller-runtime. When running tests directly (e.g., via an IDE) without using
+// Makefile targets, the 'BinaryAssetsDirectory' must be explicitly configured.
+//
+// This function streamlines the process by finding the required binaries, similar to
+// setting the 'KUBEBUILDER_ASSETS' environment variable. To ensure the binaries are
+// properly set up, run 'make setup-envtest' beforehand.
+func getFirstFoundEnvTestBinaryDir() string {
+	basePath := filepath.Join("..", "..", "bin", "k8s")
+	entries, err := os.ReadDir(basePath)
+	if err != nil {
+		logf.Log.Error(err, "Failed to read directory", "path", basePath)
+		return ""
+	}
+	for _, entry := range entries {
+		if entry.IsDir() {
+			return filepath.Join(basePath, entry.Name())
+		}
+	}
+	return ""
+}