add make target explore-test-coverage

src/Makefile

@@ -1,20 +1,18 @@
 PROJECT_DIR := $(shell dirname $(abspath $(lastword $(MAKEFILE_LIST))))
-CONTROLLER_GEN = $(PROJECT_DIR)/bin/controller-gen
-KO = $(PROJECT_DIR)/bin/ko
-ENVTEST = $(PROJECT_DIR)/bin/setup-envtest
-GINKGO = $(PROJECT_DIR)/bin/ginkgo
-TOOLCHAIN = \
-	$(CONTROLLER_GEN) \
-	$(KO) \
-	$(ENVTEST) \
-	$(GINKGO)
+BIN_DIR := $(PROJECT_DIR)/bin
+SCRIPTS_DIR := $(PROJECT_DIR)/scripts
+CONTROLLER_GEN = $(BIN_DIR)controller-gen
+KO = $(BIN_DIR)/ko
+SETUP_ENVTEST = $(BIN_DIR)/setup-envtest
+GINKGO = $(BIN_DIR)/ginkgo
 HELM_BASE_OPTS ?= --set serviceAccount.annotations.eks\\.amazonaws\\.com/role-arn=${NTHV2_IAM_ROLE_ARN}
 GINKGO_BASE_OPTS ?= --coverpkg $(shell head -n 1 $(PROJECT_DIR)/go.mod | cut -s -d ' ' -f 2)/pkg/...
 KODATA = \
 	cmd/controller/kodata/HEAD \
 	cmd/controller/kodata/refs \
 	cmd/webhook/kodata/HEAD \
 	cmd/webhook/kodata/refs
+CODECOVERAGE_OUT = $(PROJECT_DIR)/coverprofile.out
 
 # Image URL to use all building/pushing image targets
 IMG ?= controller:latest
@@ -51,11 +49,24 @@ SHELL = /usr/bin/env bash -o pipefail
 help: ## Display this help.
 	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)
 
-$(TOOLCHAIN) &:
-	@./scripts/toolchain.sh -d "$(PROJECT_DIR)/bin"
-
 ##@ Development
 
+$(CONTROLLER_GEN):
+	GOBIN="$(BIN_DIR)" go install sigs.k8s.io/controller-tools/cmd/[email protected]
+
+$(GINKGO):
+	GOBIN="$(BIN_DIR)" go install github.com/onsi/ginkgo/v2/[email protected]
+
+$(KO):
+	GOBIN="$(BIN_DIR)" go install github.com/google/[email protected]
+
+$(SETUP_ENVTEST):
+	GOBIN="$(BIN_DIR)" go install sigs.k8s.io/controller-runtime/tools/[email protected]
+	PATH="$(BIN_DIR):$(PATH)" $(SCRIPTS_DIR)/download-kubebuilder-assets.sh
+
+.PHONY: tools
+tools: $(CONTROLLER_GEN) $(GINKGO) $(KO) $(SETUP_ENVTEST) ## Pre-install additional tools.
+
 .PHONY: generate
 generate: $(CONTROLLER_GEN)  ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
 	$(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./..."
@@ -65,11 +76,21 @@ verify: ## Run go fmt and go vet against code.
 	go fmt $(PROJECT_DIR)/...
 	go vet $(PROJECT_DIR)/...
 
-.PHONY: test
-test: $(GINKGO) ## Run tests.
+$(CODECOVERAGE_OUT): $(GINKGO)
 	go vet $(PROJECT_DIR)/...
 	$(GINKGO) run $(GINKGO_BASE_OPTS) $(GINKGO_OPTS) $(PROJECT_DIR)/test/
 
+.PHONY: delete-test-coverage
+delete-test-coverage:
+	rm -f $(CODECOVERAGE_OUT)
+
+.PHONY: test
+test: delete-test-coverage $(CODECOVERAGE_OUT)  ## Run tests.
+
+.PHONY: explore-test-coverage
+explore-test-coverage: $(CODECOVERAGE_OUT) ## Display test coverage report in default web browser.
+	go tool cover -html=$<
+
 ##@ Build
 
 .PHONY: run

src/scripts/download-kubebuilder-assets.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+k8s_version="${K8S_VERSION:-1.21.x}"
+kubebuilder_assets_dir="${KUBEBUILDER_ASSETS:-$HOME/.kubebuilder/bin}"
+
+usage=$(cat << EOM
+usage: $(basename "$0") -h | [-k VERSION] [-d PATH]
+
+    Download kubebuilder assets to PATH.
+
+    Arguments:
+        -h         Print usage message then exit.
+        -k VERSION Kubernetes version (default ${k8s_version}).
+        -d PATH    Destination directory for downloaded assets (default ${kubebuilder_assets_dir}).
+
+EOM
+)
+
+while getopts "k:d:h" opt; do
+    case $opt in
+        k ) k8s_version="$OPTARG"
+            ;;
+        d ) kubebuilder_assets_dir="$OPTARG"
+            ;;
+        * ) echo "$usage" 1>&2
+            exit 1
+            ;;
+    esac
+done
+
+# Kubebuilder does not support darwin/arm64 so use amd64 through Rosetta instead.
+arch="$(go env GOARCH)"
+if [[ "$(go env GOOS)/$arch" == "darwin/arm64" ]]; then
+    arch="amd64"
+fi
+
+mkdir -p "$kubebuilder_assets_dir"
+ln -sf "$(setup-envtest use -p path "$k8s_version" --arch="$arch" --bin-dir="$kubebuilder_assets_dir")"/* "$kubebuilder_assets_dir"
+find "$kubebuilder_assets_dir"