use non-experimental slices package, configure renovate to pick up updates to _VERSION vars in Makefiles (https://docs.renovatebot.com/presets-customManagers/\#custommanagersmakefileversions)

Author: AshleyDumaine

Makefile

@@ -5,7 +5,7 @@ REGISTRY            ?= docker.io/linode
 IMAGE_NAME          ?= cluster-api-provider-linode
 CONTROLLER_IMAGE    ?= $(REGISTRY)/$(IMAGE_NAME)
 TAG                 ?= dev
-ENVTEST_K8S_VERSION ?= $(shell go list -m -f "{{ .Version }}" k8s.io/api | awk -F'[v.]' '{printf "1.%d", $$3}')
+ENVTEST_K8SVERSION ?= $(shell go list -m -f "{{ .Version }}" k8s.io/api | awk -F'[v.]' '{printf "1.%d", $$3}')
 VERSION             ?= $(shell git describe --always --tag --dirty=-dev)
 BUILD_ARGS          := --build-arg VERSION=$(VERSION)
 SHELL                = /usr/bin/env bash -o pipefail
@@ -15,7 +15,7 @@ MDBOOK_DEV_HOST      = 0.0.0.0
 MDBOOK_DEV_PORT      = 3000
 E2E_SELECTOR        ?= all
 
-# ENVTEST_K8S_VERSION
+# ENVTEST_K8SVERSION
 # - refers to the version of kubebuilder assets to be downloaded by envtest binary.
 # CONTAINER_TOOL
 # - defines the container tool to be used for building images.
@@ -155,7 +155,7 @@ docs:
 .PHONY: test
 test: generate fmt vet ## Run tests.
 	go env -w GOTOOLCHAIN=go1.25.0+auto
-	KUBEBUILDER_ASSETS="$(shell setup-envtest use $(ENVTEST_K8S_VERSION) --bin-dir $(CACHE_BIN) -p path)" go test -race -timeout 60s `go list ./... | grep -v ./mock$$`  -coverprofile cover.out.tmp
+	KUBEBUILDER_ASSETS="$(shell setup-envtest use $(ENVTEST_K8SVERSION) --bin-dir $(CACHE_BIN) -p path)" go test -race -timeout 60s `go list ./... | grep -v ./mock$$`  -coverprofile cover.out.tmp
 	grep -v "zz_generated.*" cover.out.tmp > cover.out
 	rm cover.out.tmp
 

cloud/services/domains.go

@@ -6,12 +6,12 @@ import (
 	"fmt"
 	"net"
 	"net/netip"
+	"slices"
 	"strings"
 	"sync"
 
 	"github.com/akamai/AkamaiOPEN-edgegrid-golang/v8/pkg/dns"
 	"github.com/linode/linodego"
-	"golang.org/x/exp/slices"
 	"sigs.k8s.io/cluster-api/api/core/v1beta2"
 	kutil "sigs.k8s.io/cluster-api/util"
 

go.mod

@@ -26,7 +26,6 @@ require (
 	go.uber.org/automaxprocs v1.6.0
 	go.uber.org/mock v0.6.0
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
-	golang.org/x/exp v0.0.0-20250305212735-054e65f0b394
 	golang.org/x/mod v0.28.0
 	k8s.io/api v0.34.1
 	k8s.io/apimachinery v0.34.1
@@ -325,6 +324,7 @@ require (
 	go.yaml.in/yaml/v2 v2.4.2 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	golang.org/x/crypto v0.42.0 // indirect
+	golang.org/x/exp v0.0.0-20250305212735-054e65f0b394 // indirect
 	golang.org/x/exp/typeparams v0.0.0-20250911091902-df9299821621 // indirect
 	golang.org/x/sync v0.17.0 // indirect
 	golang.org/x/telemetry v0.0.0-20250908211612-aef8a434d053 // indirect

renovate.json

@@ -2,5 +2,19 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "config:recommended"
+  ],
+  "customManagers": [
+    {
+      "customType": "regex",
+      "managerFilePatterns": [
+        "/(^|/)Makefile$/",
+        "/(^|/)makefile$/",
+        "/(^|/)GNUMakefile$/",
+        "/\\.mk$/"
+      ],
+      "matchStrings": [
+        "# renovate: datasource=(?<datasource>[a-zA-Z0-9-._]+?) depName=(?<depName>[^\\s]+?)(?: (?:packageName)=(?<packageName>[^\\s]+?))?(?: versioning=(?<versioning>[^\\s]+?))?(?: extractVersion=(?<extractVersion>[^\\s]+?))?(?: registryUrl=(?<registryUrl>[^\\s]+?))?\\s+[A-Za-z0-9_]+?_VERSION\\s*:*\\??=\\s*[\"']?(?<currentValue>.+?)[\"']?\\s"
+      ]
+    }
   ]
 }