Enable unparam linter

... and fix lints on the way.

Signed-off-by: Tom Wieczorek <[email protected]>

.golangci.yml

@@ -20,6 +20,7 @@ linters:
     - revive      # Stricter drop-in replacement for golint
     - testifylint # Checks usage of github.com/stretchr/testify
     - unconvert   # Checks for unnecessary type conversions
+    - unparam     # Checks for unused function parameters
 
 linters-settings:
   depguard:

internal/pkg/file/atomic_test.go

@@ -84,10 +84,12 @@ func TestWriteAtomically(t *testing.T) {
 		return
 	}
 
-	assertDirEmpty := func(t *testing.T, dir string) bool {
+	assertDirEmpty := func(t *testing.T, dir string) {
 		t.Helper()
 		entries, err := os.ReadDir(dir)
-		return assert.NoError(t, err) && assert.Empty(t, entries)
+		if assert.NoError(t, err) {
+			assert.Empty(t, entries)
+		}
 	}
 
 	t.Run("writeFails", func(t *testing.T) {

inttest/bind-address/bind_address_test.go

@@ -100,7 +100,7 @@ func (s *suite) TestCustomizedBindAddress() {
 		}
 		s.Require().NoError(eg.Wait())
 
-		s.Require().NoError(s.checkClusterReadiness(ctx, clients, 1))
+		s.Require().NoError(s.checkClusterReadiness(ctx, clients))
 	})
 
 	s.Run("join_new_controllers", func() {
@@ -117,11 +117,11 @@ func (s *suite) TestCustomizedBindAddress() {
 		s.Require().NoError(err)
 
 		s.T().Logf("Checking if HA cluster is ready")
-		s.Require().NoError(s.checkClusterReadiness(ctx, clients, s.ControllerCount))
+		s.Require().NoError(s.checkClusterReadiness(ctx, clients))
 	})
 }
 
-func (s *suite) checkClusterReadiness(ctx context.Context, clients *kubernetes.Clientset, numControllers int, degradedControllers ...string) error {
+func (s *suite) checkClusterReadiness(ctx context.Context, clients *kubernetes.Clientset) error {
 	eg, ctx := errgroup.WithContext(ctx)
 
 	eg.Go(func() error {

pkg/applier/manager_test.go

@@ -39,7 +39,6 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 	"k8s.io/apimachinery/pkg/runtime/schema"
-	"k8s.io/apimachinery/pkg/util/wait"
 
 	yaml "sigs.k8s.io/yaml/goyaml.v2"
 
@@ -216,13 +215,12 @@ func TestManager(t *testing.T) {
 	writeLabel(t, filepath.Join(dir, "stack1/pod.yaml"), "custom1", "test")
 
 	t.Log("waiting for pod to be updated")
-	waitFor(t, 100*time.Millisecond, 5*time.Second, func(ctx context.Context) (bool, error) {
+	require.EventuallyWithT(t, func(t *assert.CollectT) {
 		r, err := getResource(fakes, *podgv, "kube-system", "applier-test")
-		if err != nil {
-			return false, nil
+		if assert.NoError(t, err) {
+			assert.Equal(t, "test", r.GetLabels()["custom1"])
 		}
-		return r.GetLabels()["custom1"] == "test", nil
-	})
+	}, 5*time.Second, 100*time.Millisecond)
 
 	// lose and re-acquire leadership
 	le.deactivate()
@@ -247,27 +245,23 @@ func TestManager(t *testing.T) {
 	writeLabel(t, filepath.Join(dir, "stack1/pod.yaml"), "custom2", "test")
 
 	t.Log("waiting for pod to be updated")
-	waitFor(t, 100*time.Millisecond, 5*time.Second, func(ctx context.Context) (bool, error) {
+	require.EventuallyWithT(t, func(t *assert.CollectT) {
 		r, err := getResource(fakes, *podgv, "kube-system", "applier-test")
-		if err != nil {
-			return false, nil
+		if assert.NoError(t, err) {
+			assert.Equal(t, "test", r.GetLabels()["custom2"])
 		}
-		return r.GetLabels()["custom2"] == "test", nil
-	})
+	}, 5*time.Second, 100*time.Millisecond)
 
 	// delete the stack and verify the resources are deleted
 
 	err = os.RemoveAll(filepath.Join(dir, "stack1"))
 	require.NoError(t, err)
 
 	t.Log("waiting for pod to be deleted")
-	waitFor(t, 100*time.Millisecond, 5*time.Second, func(ctx context.Context) (bool, error) {
+	require.EventuallyWithT(t, func(t *assert.CollectT) {
 		_, err := getResource(fakes, *podgv, "kube-system", "applier-test")
-		if errors.IsNotFound(err) {
-			return true, nil
-		}
-		return false, nil
-	})
+		assert.Truef(t, errors.IsNotFound(err), "Expected a 'not found' error: %v", err)
+	}, 5*time.Second, 100*time.Millisecond)
 }
 
 func writeLabel(t *testing.T, file string, key string, value string) {
@@ -286,27 +280,19 @@ func writeLabel(t *testing.T, file string, key string, value string) {
 
 func waitForResource(t *testing.T, fakes *kubeutil.FakeClientFactory, gv schema.GroupVersionResource, namespace string, name string) {
 	t.Logf("waiting for resource %s/%s", gv.Resource, name)
-	waitFor(t, 100*time.Millisecond, 5*time.Second, func(ctx context.Context) (bool, error) {
+	require.EventuallyWithT(t, func(c *assert.CollectT) {
 		_, err := getResource(fakes, gv, namespace, name)
-		if errors.IsNotFound(err) {
-			return false, nil
-		} else if err != nil {
-			return false, err
+		if err != nil {
+			require.Truef(t, errors.IsNotFound(err), "Expected a 'not found' error: %v", err)
+			assert.NoError(c, err)
 		}
-		return true, nil
-	})
+	}, 5*time.Second, 100*time.Millisecond)
 }
 
 func getResource(fakes *kubeutil.FakeClientFactory, gv schema.GroupVersionResource, namespace string, name string) (*unstructured.Unstructured, error) {
 	return fakes.DynamicClient.Resource(gv).Namespace(namespace).Get(context.Background(), name, metav1.GetOptions{})
 }
 
-func waitFor(t *testing.T, interval, timeout time.Duration, fn wait.ConditionWithContextFunc) {
-	t.Helper()
-	err := wait.PollUntilContextTimeout(context.Background(), interval, timeout, true, fn)
-	require.NoError(t, err)
-}
-
 func writeStack(t *testing.T, dst string, src string) {
 	dstStackDir := filepath.Join(dst, path.Base(src))
 	err := os.MkdirAll(dstStackDir, 0755)

pkg/autopilot/controller/plans/init.go

@@ -73,7 +73,7 @@ func registerNewPlanStateController(logger *logrus.Entry, mgr crman.Manager, pro
 		providers...,
 	)
 
-	return registerPlanStateController("newplan", logger, mgr, newPlanEventFilter(), handler, providers)
+	return registerPlanStateController("newplan", logger, mgr, newPlanEventFilter(), handler)
 }
 
 // registerSchedulableWaitStateController registers the 'schedulablewait' plan state controller to
@@ -87,7 +87,7 @@ func registerSchedulableWaitStateController(logger *logrus.Entry, mgr crman.Mana
 		providers...,
 	)
 
-	return registerPlanStateController("schedulablewait", logger, mgr, schedulableWaitEventFilter(), handler, providers)
+	return registerPlanStateController("schedulablewait", logger, mgr, schedulableWaitEventFilter(), handler)
 }
 
 // registerSchedulableStateController registers the 'schedulable' plan state controller to
@@ -101,12 +101,12 @@ func registerSchedulableStateController(logger *logrus.Entry, mgr crman.Manager,
 		providers...,
 	)
 
-	return registerPlanStateController("schedulable", logger, mgr, schedulableEventFilter(), handler, providers)
+	return registerPlanStateController("schedulable", logger, mgr, schedulableEventFilter(), handler)
 }
 
 // registerPlanStateController is a helper for registering a plan state controller into
 // controller-runtime.
-func registerPlanStateController(name string, logger *logrus.Entry, mgr crman.Manager, eventFilter crpred.Predicate, handler appc.PlanStateHandler, providers []appc.PlanCommandProvider) error {
+func registerPlanStateController(name string, logger *logrus.Entry, mgr crman.Manager, eventFilter crpred.Predicate, handler appc.PlanStateHandler) error {
 	return cr.NewControllerManagedBy(mgr).
 		Named("planstate-" + name).
 		For(&apv1beta2.Plan{}).

pkg/autopilot/controller/updates/periodicupdater.go

@@ -45,8 +45,7 @@ type periodicUpdater struct {
 	ticker *time.Ticker
 }
 
-func newPeriodicUpdater(ctx context.Context, updateConfig apv1beta2.UpdateConfig, k8sClient crcli.Client, apClientFactory apcli.FactoryInterface, clusterID, currentK0sVersion string) (*periodicUpdater, error) {
-
+func newPeriodicUpdater(ctx context.Context, updateConfig apv1beta2.UpdateConfig, k8sClient crcli.Client, apClientFactory apcli.FactoryInterface, clusterID, currentK0sVersion string) *periodicUpdater {
 	return &periodicUpdater{
 		ctx:               ctx,
 		log:               logrus.WithField("component", "periodic-updater"),
@@ -55,7 +54,7 @@ func newPeriodicUpdater(ctx context.Context, updateConfig apv1beta2.UpdateConfig
 		clusterID:         clusterID,
 		currentK0sVersion: currentK0sVersion,
 		apClientFactory:   apClientFactory,
-	}, nil
+	}
 }
 
 func (u *periodicUpdater) Config() *apv1beta2.UpdateConfig {

pkg/autopilot/controller/updates/updater.go

@@ -75,7 +75,7 @@ func newUpdater(parentCtx context.Context, updateConfig apv1beta2.UpdateConfig,
 	case apv1beta2.UpdateStrategyTypeCron:
 		return newCronUpdater(parentCtx, updateConfig, k8sClient, clusterID, updateClient)
 	case apv1beta2.UpdateStrategyTypePeriodic:
-		return newPeriodicUpdater(parentCtx, updateConfig, k8sClient, apClientFactory, clusterID, build.Version)
+		return newPeriodicUpdater(parentCtx, updateConfig, k8sClient, apClientFactory, clusterID, build.Version), nil
 	default:
 		return nil, fmt.Errorf("unknown update strategy type: %s", updateConfig.Spec.UpgradeStrategy.Type)
 	}

pkg/certificate/manager.go

@@ -105,7 +105,7 @@ func (m *Manager) EnsureCertificate(certReq Request, ownerID int) (Certificate,
 	certFile := filepath.Join(m.K0sVars.CertRootDir, fmt.Sprintf("%s.crt", certReq.Name))
 
 	// if regenerateCert returns true, it means we need to create the certs
-	if m.regenerateCert(certReq, keyFile, certFile) {
+	if m.regenerateCert(keyFile, certFile) {
 		logrus.Debugf("creating certificate %s", certFile)
 		req := csr.CertificateRequest{
 			KeyRequest: csr.NewKeyRequest(),
@@ -191,7 +191,7 @@ func (m *Manager) EnsureCertificate(certReq Request, ownerID int) (Certificate,
 
 // if regenerateCert does not need to do any changes, it will return false
 // if a change in SAN hosts is detected, if will return true, to re-generate certs
-func (m *Manager) regenerateCert(certReq Request, keyFile string, certFile string) bool {
+func (m *Manager) regenerateCert(keyFile string, certFile string) bool {
 	var cert *certinfo.Certificate
 	var err error
 

pkg/component/controller/workerconfig/reconciler_test.go

@@ -373,35 +373,35 @@ func TestReconciler_ResourceGeneration(t *testing.T) {
 		},
 	}))
 
-	configMaps := map[string]func(t *testing.T, expected *kubeletConfig){
-		"worker-config-default-1.31": func(t *testing.T, expected *kubeletConfig) {
+	expectedConfigMaps := map[string]func(expected *kubeletConfig){
+		"worker-config-default-1.31": func(expected *kubeletConfig) {
 			expected.CgroupsPerQOS = ptr.To(true)
 			expected.FeatureGates = map[string]bool{"kubelet-feature": true}
 		},
 
-		"worker-config-default-windows-1.31": func(t *testing.T, expected *kubeletConfig) {
+		"worker-config-default-windows-1.31": func(expected *kubeletConfig) {
 			expected.CgroupsPerQOS = ptr.To(false)
 			expected.FeatureGates = map[string]bool{"kubelet-feature": true}
 		},
 
-		"worker-config-profile_XXX-1.31": func(t *testing.T, expected *kubeletConfig) {
+		"worker-config-profile_XXX-1.31": func(expected *kubeletConfig) {
 			expected.Authentication.Anonymous.Enabled = ptr.To(true)
 			expected.FeatureGates = map[string]bool{"kubelet-feature": true}
 		},
 
-		"worker-config-profile_YYY-1.31": func(t *testing.T, expected *kubeletConfig) {
+		"worker-config-profile_YYY-1.31": func(expected *kubeletConfig) {
 			expected.Authentication.Webhook.CacheTTL = metav1.Duration{Duration: 15 * time.Second}
 			expected.FeatureGates = map[string]bool{"kubelet-feature": true}
 		},
 	}
 
 	appliedResources := applied()
-	assert.Len(t, appliedResources, len(configMaps)+2)
+	assert.Len(t, appliedResources, len(expectedConfigMaps)+2)
 
-	for name, mod := range configMaps {
+	for name, configModFn := range expectedConfigMaps {
 		t.Run(name, func(t *testing.T) {
 			kubelet := requireKubelet(t, appliedResources, name)
-			expected := makeKubeletConfig(t, func(expected *kubeletConfig) { mod(t, expected) })
+			expected := makeKubeletConfig(t, configModFn)
 			assert.JSONEq(t, expected, kubelet)
 		})
 	}
@@ -427,9 +427,9 @@ func TestReconciler_ResourceGeneration(t *testing.T) {
 		require.NoError(t, err)
 		require.True(t, ok, "No resourceNames field")
 
-		assert.Len(t, resourceNames, len(configMaps))
-		for expected := range configMaps {
-			assert.Contains(t, resourceNames, expected)
+		assert.Len(t, resourceNames, len(expectedConfigMaps))
+		for name := range expectedConfigMaps {
+			assert.Contains(t, resourceNames, name)
 		}
 	})
 
@@ -577,10 +577,10 @@ func TestReconciler_runReconcileLoop(t *testing.T) {
 	updates, firstDone, secondDone := make(chan updateFunc, 2), make(chan error, 1), make(chan error, 1)
 
 	// Put in the first update.
-	updates <- func(s *snapshot) chan<- error { return firstDone }
+	updates <- func(*snapshot) chan<- error { return firstDone }
 
 	// Put in the second update that'll cancel the context.
-	updates <- func(s *snapshot) chan<- error { cancel(); return secondDone }
+	updates <- func(*snapshot) chan<- error { cancel(); return secondDone }
 
 	underTest.runReconcileLoop(ctx, updates, nil)
 

pkg/component/prober/prober.go

@@ -145,7 +145,7 @@ func (p *Prober) healthCheckLoop(ctx context.Context) {
 			return
 		case at := <-ticker.C:
 			p.l.Debug("Probing components")
-			p.checkComponentsHealth(ctx, at)
+			p.checkComponentsHealth(at)
 			// limit amount of iterations for the test purposes
 			if p.stopAfterIterationNum > 0 {
 				epoch++
@@ -156,7 +156,7 @@ func (p *Prober) healthCheckLoop(ctx context.Context) {
 		}
 	}
 }
-func (p *Prober) checkComponentsHealth(ctx context.Context, at time.Time) {
+func (p *Prober) checkComponentsHealth(at time.Time) {
 	for name, component := range p.withHealthComponents {
 		p.Lock()
 		if _, ok := p.healthCheckState[name]; !ok {

pkg/kubernetes/watch/watcher_test.go

@@ -496,7 +496,7 @@ func TestWatcher(t *testing.T) {
 
 			return nil
 		}
-		second = func(opts metav1.ListOptions) error {
+		second = func(opts metav1.ListOptions) error { // nolint:unparam // error required to satisfy interface
 			assert.Equal(t, "the bookmark", opts.ResourceVersion)
 			assert.True(t, opts.AllowWatchBookmarks)
 
@@ -508,7 +508,7 @@ func TestWatcher(t *testing.T) {
 
 			return nil
 		}
-		third = func(opts metav1.ListOptions) error {
+		third = func(opts metav1.ListOptions) error { // nolint:unparam // error required to satisfy interface
 			assert.Equal(t, "someConfigMap", opts.ResourceVersion)
 			assert.True(t, opts.AllowWatchBookmarks)