Add a Makefile target and start running the API diff linter as part of CI.

Author: camilamacedo86

Makefile

@@ -118,7 +118,7 @@ help-extended: #HELP Display extended help.
 #SECTION Development
 
 .PHONY: lint
-lint: lint-custom $(GOLANGCI_LINT) #HELP Run golangci linter.
+lint: lint-custom lint-api-diff $(GOLANGCI_LINT) #HELP Run golangci linter.
 	$(GOLANGCI_LINT) run --build-tags $(GO_BUILD_TAGS) $(GOLANGCI_LINT_ARGS)
 
 .PHONY: lint-helm
@@ -149,6 +149,10 @@ custom-linter-build: #EXHELP Build custom linter
 lint-custom: custom-linter-build #EXHELP Call custom linter for the project
 	go vet -tags=$(GO_BUILD_TAGS) -vettool=./bin/custom-linter ./...
 
+.PHONY: lint-api-diff
+lint-api-diff: $(GOLANGCI_LINT) #HELP Validate API changes using kube-api-linter with diff-aware analysis
+	bash hack/api-lint-diff/run.sh
+
 .PHONY: k8s-pin
 k8s-pin: #EXHELP Pin k8s staging modules based on k8s.io/kubernetes version (in go.mod or from K8S_IO_K8S_VERSION env var) and run go mod tidy.
 	K8S_IO_K8S_VERSION='$(K8S_IO_K8S_VERSION)' go run hack/tools/k8smaintainer/main.go
@@ -198,7 +202,7 @@ generate: $(CONTROLLER_GEN) #EXHELP Generate code containing DeepCopy, DeepCopyI
 	$(CONTROLLER_GEN) --load-build-tags=$(GO_BUILD_TAGS) object:headerFile="hack/boilerplate.go.txt" paths="./..."
 
 .PHONY: verify
-verify: k8s-pin kind-verify-versions fmt generate manifests update-tls-profiles crd-ref-docs verify-bingo #HELP Verify all generated code is up-to-date. Runs k8s-pin instead of just tidy.
+verify: k8s-pin kind-verify-versions fmt generate manifests update-tls-profiles crd-ref-docs verify-bingo lint-api-diff #HELP Verify all generated code is up-to-date. Runs k8s-pin instead of just tidy.
 	git diff --exit-code
 
 .PHONY: verify-bingo

hack/api-lint-diff/run.sh

@@ -196,7 +196,31 @@ check_linter_support() {
 
 # Find golangci-lint binary
 find_golangci_lint() {
-    # Check for custom build first
+    # Check if Variables.mk exists and extract golangci-lint path
+    if [[ -f ".bingo/Variables.mk" ]]; then
+        # Extract the full path from GOLANGCI_LINT := $(GOBIN)/golangci-lint-v2.7.2
+        local gobin
+        gobin=$(grep '^GOBIN' .bingo/Variables.mk | head -1 | sed -E 's/^GOBIN[[:space:]]*:?=[[:space:]]*//' | sed 's/\$([^)]*)//' | xargs)
+
+        # If GOBIN is not found, use default
+        if [[ -z "${gobin}" ]]; then
+            gobin=$(go env GOPATH | cut -d: -f1)/bin
+        fi
+
+        # Extract version from GOLANGCI_LINT variable
+        local version
+        version=$(grep '^GOLANGCI_LINT' .bingo/Variables.mk | sed -E 's/.*golangci-lint-(v[0-9.]+).*/\1/')
+
+        if [[ -n "${version}" ]]; then
+            local bingo_path="${gobin}/golangci-lint-${version}"
+            if [[ -f "${bingo_path}" ]]; then
+                echo "${bingo_path}"
+                return 0
+            fi
+        fi
+    fi
+
+    # Check for custom build
     if [[ -f ".bingo/golangci-lint" ]]; then
         echo ".bingo/golangci-lint"
         return 0
@@ -216,6 +240,7 @@ find_golangci_lint() {
 
     echo -e "${RED}Error: golangci-lint not found.${NC}" >&2
     echo -e "${RED}Searched for:${NC}" >&2
+    echo -e "  - .bingo/Variables.mk (bingo-managed versioned binary)" >&2
     echo -e "  - .bingo/golangci-lint" >&2
     echo -e "  - bin/golangci-lint" >&2
     echo -e "  - golangci-lint on your \$PATH" >&2