chore(code): use int ranges in loops BE-10990 (#12028)

.golangci.yaml

@@ -10,6 +10,7 @@ linters:
     - govet
     - errorlint
     - copyloopvar
+    - intrange
 
 linters-settings:
   depguard:

api/apikey/apikey_test.go

@@ -40,10 +40,12 @@ func Test_generateRandomKey(t *testing.T) {
 
 	t.Run("Generated keys are unique", func(t *testing.T) {
 		keys := make(map[string]bool)
-		for i := 0; i < 100; i++ {
+
+		for range 100 {
 			key := GenerateRandomKey(8)
 			_, ok := keys[string(key)]
 			is.False(ok)
+
 			keys[string(key)] = true
 		}
 	})

api/concurrent/concurrent.go

@@ -93,6 +93,7 @@ type Func func(ctx context.Context) (any, error)
 // Run runs a list of functions returns the results
 func Run(ctx context.Context, maxConcurrency int, tasks ...Func) ([]Result, error) {
 	var wg sync.WaitGroup
+
 	resultsChan := make(chan Result, len(tasks))
 	taskChan := make(chan Func, len(tasks))
 
@@ -101,6 +102,7 @@ func Run(ctx context.Context, maxConcurrency int, tasks ...Func) ([]Result, erro
 
 	runTask := func() {
 		defer wg.Done()
+
 		for fn := range taskChan {
 			result, err := fn(localCtx)
 			resultsChan <- Result{Result: result, Err: err}
@@ -113,7 +115,7 @@ func Run(ctx context.Context, maxConcurrency int, tasks ...Func) ([]Result, erro
 	}
 
 	// Start worker goroutines
-	for i := 0; i < maxConcurrency; i++ {
+	for range maxConcurrency {
 		wg.Add(1)
 		go runTask()
 	}
@@ -135,8 +137,10 @@ func Run(ctx context.Context, maxConcurrency int, tasks ...Func) ([]Result, erro
 	for r := range resultsChan {
 		if r.Err != nil {
 			cancelCtx()
+
 			return nil, r.Err
 		}
+
 		results = append(results, r)
 	}
 

api/dataservices/stack/tests/stack_test.go

@@ -33,7 +33,7 @@ func TestService_StackByWebhookID(t *testing.T) {
 
 	b := stackBuilder{t: t, store: store}
 	b.createNewStack(newGuidString(t))
-	for i := 0; i < 10; i++ {
+	for range 10 {
 		b.createNewStack("")
 	}
 	webhookID := newGuidString(t)

api/docker/images/registry.go

@@ -1,6 +1,7 @@
 package images
 
 import (
+	"cmp"
 	"strings"
 	"time"
 
@@ -41,8 +42,7 @@ func (c *RegistryClient) RegistryAuth(image Image) (string, string, error) {
 }
 
 func (c *RegistryClient) CertainRegistryAuth(registry *portainer.Registry) (string, string, error) {
-	err := registryutils.EnsureRegTokenValid(c.dataStore, registry)
-	if err != nil {
+	if err := registryutils.EnsureRegTokenValid(c.dataStore, registry); err != nil {
 		return "", "", err
 	}
 
@@ -72,8 +72,7 @@ func (c *RegistryClient) EncodedRegistryAuth(image Image) (string, error) {
 }
 
 func (c *RegistryClient) EncodedCertainRegistryAuth(registry *portainer.Registry) (string, error) {
-	err := registryutils.EnsureRegTokenValid(c.dataStore, registry)
-	if err != nil {
+	if err := registryutils.EnsureRegTokenValid(c.dataStore, registry); err != nil {
 		return "", err
 	}
 
@@ -92,38 +91,32 @@ func findBestMatchRegistry(repository string, registries []portainer.Registry) (
 	}
 
 	var match1, match2, match3 *portainer.Registry
-	for i := 0; i < len(registries); i++ {
-		registry := registries[i]
-		if registry.Type == portainer.DockerHubRegistry {
-
-			// try to match repository examples:
-			//   <USERNAME>/nginx:latest
-			//   docker.io/<USERNAME>/nginx:latest
-			if strings.HasPrefix(repository, registry.Username+"/") || strings.HasPrefix(repository, registry.URL+"/"+registry.Username+"/") {
-				match1 = &registry
-			}
-
-			// try to match repository examples:
-			//   portainer/portainer-ee:latest
-			//   <NON-USERNAME>/portainer-ee:latest
-			if match3 == nil {
-				match3 = &registry
-			}
-		}
 
+	for _, registry := range registries {
 		if strings.Contains(repository, registry.URL) {
 			match2 = &registry
 		}
+
+		if registry.Type != portainer.DockerHubRegistry {
+			continue
+		}
+
+		// try to match repository examples:
+		//   <USERNAME>/nginx:latest
+		//   docker.io/<USERNAME>/nginx:latest
+		if strings.HasPrefix(repository, registry.Username+"/") || strings.HasPrefix(repository, registry.URL+"/"+registry.Username+"/") {
+			match1 = &registry
+		}
+
+		// try to match repository examples:
+		//   portainer/portainer-ee:latest
+		//   <NON-USERNAME>/portainer-ee:latest
+		if match3 == nil {
+			match3 = &registry
+		}
 	}
 
-	match := match1
-	if match == nil {
-		match = match2
-	}
-	if match == nil {
-		match = match3
-	}
-
+	match := cmp.Or(match1, match2, match3)
 	if match == nil {
 		return nil, errors.New("no registries matched")
 	}

api/http/handler/customtemplates/customtemplate_git_fetch_test.go

@@ -157,28 +157,33 @@ func Test_customTemplateGitFetch(t *testing.T) {
 	t.Run("can return the expected file content by multiple calls from one user", func(t *testing.T) {
 		var wg sync.WaitGroup
 		wg.Add(5)
-		for i := 0; i < 5; i++ {
+
+		for range 5 {
 			go func() {
 				singleAPIRequest(h, jwt1, is, "abcdefg")
 				wg.Done()
 			}()
 		}
+
 		wg.Wait()
 	})
 
 	t.Run("can return the expected file content by multiple calls from different users", func(t *testing.T) {
 		var wg sync.WaitGroup
 		wg.Add(10)
-		for i := 0; i < 10; i++ {
+
+		for i := range 10 {
 			go func(j int) {
 				if j%2 == 0 {
 					singleAPIRequest(h, jwt1, is, "abcdefg")
 				} else {
 					singleAPIRequest(h, jwt2, is, "abcdefg")
 				}
+
 				wg.Done()
 			}(i)
 		}
+
 		wg.Wait()
 	})
 

api/http/handler/endpoints/endpoint_delete_test.go

@@ -27,7 +27,7 @@ func TestEndpointDeleteEdgeGroupsConcurrently(t *testing.T) {
 
 	var endpointIDs []portainer.EndpointID
 
-	for i := 0; i < endpointsCount; i++ {
+	for i := range endpointsCount {
 		endpointID := portainer.EndpointID(i) + 1
 
 		if err := store.Endpoint().Create(&portainer.Endpoint{

api/http/handler/tags/tag_delete_test.go

@@ -29,7 +29,7 @@ func TestTagDeleteEdgeGroupsConcurrently(t *testing.T) {
 
 	var tagIDs []portainer.TagID
 
-	for i := 0; i < tagsCount; i++ {
+	for i := range tagsCount {
 		tagID := portainer.TagID(i) + 1
 
 		if err := store.Tag().Create(&portainer.Tag{

api/http/proxy/factory/kubernetes/token_cache_test.go

@@ -27,7 +27,7 @@ func failFunc(t *testing.T) func() (string, error) {
 func TestTokenCacheDataRace(t *testing.T) {
 	ch := make(chan struct{})
 
-	for i := 0; i < 1000; i++ {
+	for range 1000 {
 		var tokenCache1, tokenCache2 *tokenCache
 
 		mgr := NewTokenCacheManager()

api/internal/endpointutils/endpointutils.go

@@ -13,7 +13,9 @@ import (
 
 // IsLocalEndpoint returns true if this is a local environment(endpoint)
 func IsLocalEndpoint(endpoint *portainer.Endpoint) bool {
-	return strings.HasPrefix(endpoint.URL, "unix://") || strings.HasPrefix(endpoint.URL, "npipe://") || endpoint.Type == 5
+	return strings.HasPrefix(endpoint.URL, "unix://") ||
+		strings.HasPrefix(endpoint.URL, "npipe://") ||
+		endpoint.Type == portainer.KubernetesLocalEnvironment
 }
 
 // IsKubernetesEndpoint returns true if this is a kubernetes environment(endpoint)
@@ -61,6 +63,7 @@ func FilterByExcludeIDs(endpoints []portainer.Endpoint, excludeIds []portainer.E
 			filteredEndpoints = append(filteredEndpoints, endpoint)
 		}
 	}
+
 	return filteredEndpoints
 }
 
@@ -187,12 +190,15 @@ func InitialStorageDetection(endpoint *portainer.Endpoint, endpointService datas
 			endpoint,
 		)
 	}()
+
 	log.Info().Msg("attempting to detect storage classes in the cluster")
+
 	err := storageDetect(endpoint, endpointService, factory)
 	if err == nil {
 		return
 	}
 	log.Err(err).Msg("error while detecting storage classes")
+
 	go func() {
 		// Retry after 30 seconds if the initial detection failed.
 		log.Info().Msg("retrying storage detection in 30 seconds")
@@ -203,38 +209,41 @@ func InitialStorageDetection(endpoint *portainer.Endpoint, endpointService datas
 }
 
 func UpdateEdgeEndpointHeartbeat(endpoint *portainer.Endpoint, settings *portainer.Settings) {
-	if IsEdgeEndpoint(endpoint) {
-		endpoint.QueryDate = time.Now().Unix()
-		checkInInterval := getEndpointCheckinInterval(endpoint, settings)
-		endpoint.Heartbeat = endpoint.QueryDate-endpoint.LastCheckInDate <= int64(checkInInterval*2+20)
+	if !IsEdgeEndpoint(endpoint) {
+		return
 	}
+
+	endpoint.QueryDate = time.Now().Unix()
+	checkInInterval := getEndpointCheckinInterval(endpoint, settings)
+	endpoint.Heartbeat = endpoint.QueryDate-endpoint.LastCheckInDate <= int64(checkInInterval*2+20)
 }
 
 func getEndpointCheckinInterval(endpoint *portainer.Endpoint, settings *portainer.Settings) int {
-	if endpoint.Edge.AsyncMode {
-		defaultInterval := 60
-		intervals := [][]int{
-			{endpoint.Edge.PingInterval, settings.Edge.PingInterval},
-			{endpoint.Edge.CommandInterval, settings.Edge.CommandInterval},
-			{endpoint.Edge.SnapshotInterval, settings.Edge.SnapshotInterval},
+	if !endpoint.Edge.AsyncMode {
+		if endpoint.EdgeCheckinInterval > 0 {
+			return endpoint.EdgeCheckinInterval
 		}
 
-		for i := 0; i < len(intervals); i++ {
-			effectiveInterval := intervals[i][0]
-			if effectiveInterval <= 0 {
-				effectiveInterval = intervals[i][1]
-			}
-			if effectiveInterval > 0 && effectiveInterval < defaultInterval {
-				defaultInterval = effectiveInterval
-			}
+		return settings.EdgeAgentCheckinInterval
+	}
+
+	defaultInterval := 60
+	intervals := [][]int{
+		{endpoint.Edge.PingInterval, settings.Edge.PingInterval},
+		{endpoint.Edge.CommandInterval, settings.Edge.CommandInterval},
+		{endpoint.Edge.SnapshotInterval, settings.Edge.SnapshotInterval},
+	}
+
+	for i := range len(intervals) {
+		effectiveInterval := intervals[i][0]
+		if effectiveInterval <= 0 {
+			effectiveInterval = intervals[i][1]
 		}
 
-		return defaultInterval
+		if effectiveInterval > 0 && effectiveInterval < defaultInterval {
+			defaultInterval = effectiveInterval
+		}
 	}
 
-	if endpoint.EdgeCheckinInterval > 0 {
-		return endpoint.EdgeCheckinInterval
-	}
-
-	return settings.EdgeAgentCheckinInterval
+	return defaultInterval
 }

api/kubernetes/cli/rbac.go

@@ -16,6 +16,8 @@ import (
 	rbacv1types "k8s.io/client-go/kubernetes/typed/rbac/v1"
 )
 
+const maxRetries = 5
+
 // IsRBACEnabled checks if RBAC is enabled in the cluster by creating a service account, then checking it's access to a resourcequota before and after setting a cluster role and cluster role binding
 func (kcl *KubeClient) IsRBACEnabled() (bool, error) {
 	namespace := "default"
@@ -23,11 +25,11 @@ func (kcl *KubeClient) IsRBACEnabled() (bool, error) {
 	resource := "resourcequotas"
 
 	saClient := kcl.cli.CoreV1().ServiceAccounts(namespace)
-	uniqueString := randomstring.RandomString(4) // append a unique string to resource names, incase they already exist
+	uniqueString := randomstring.RandomString(4) // Append a unique string to resource names, in case they already exist
 	saName := "portainer-rbac-test-sa-" + uniqueString
-	err := createServiceAccount(saClient, saName, namespace)
-	if err != nil {
+	if err := createServiceAccount(saClient, saName, namespace); err != nil {
 		log.Error().Err(err).Msg("Error creating service account")
+
 		return false, err
 	}
 	defer deleteServiceAccount(saClient, saName)
@@ -36,29 +38,30 @@ func (kcl *KubeClient) IsRBACEnabled() (bool, error) {
 	allowed, err := checkServiceAccountAccess(accessReviewClient, saName, verb, resource, namespace)
 	if err != nil {
 		log.Error().Err(err).Msg("Error checking service account access")
+
 		return false, err
 	}
 
-	// if the service account with no authorizations is allowed, RBAC must be disabled
+	// If the service account with no authorizations is allowed, RBAC must be disabled
 	if allowed {
 		return false, nil
 	}
 
-	// otherwise give the service account an rbac authorisation and check again
+	// Otherwise give the service account an rbac authorisation and check again
 	roleClient := kcl.cli.RbacV1().Roles(namespace)
 	roleName := "portainer-rbac-test-role-" + uniqueString
-	err = createRole(roleClient, roleName, verb, resource, namespace)
-	if err != nil {
+	if err := createRole(roleClient, roleName, verb, resource, namespace); err != nil {
 		log.Error().Err(err).Msg("Error creating role")
+
 		return false, err
 	}
 	defer deleteRole(roleClient, roleName)
 
 	roleBindingClient := kcl.cli.RbacV1().RoleBindings(namespace)
 	roleBindingName := "portainer-rbac-test-role-binding-" + uniqueString
-	err = createRoleBinding(roleBindingClient, roleBindingName, roleName, saName, namespace)
-	if err != nil {
+	if err := createRoleBinding(roleBindingClient, roleBindingName, roleName, saName, namespace); err != nil {
 		log.Error().Err(err).Msg("Error creating role binding")
+
 		return false, err
 	}
 	defer deleteRoleBinding(roleBindingClient, roleBindingName)
@@ -66,10 +69,11 @@ func (kcl *KubeClient) IsRBACEnabled() (bool, error) {
 	allowed, err = checkServiceAccountAccess(accessReviewClient, saName, verb, resource, namespace)
 	if err != nil {
 		log.Error().Err(err).Msg("Error checking service account access with authorizations added")
+
 		return false, err
 	}
 
-	// if the service account allowed to list resource quotas after given rbac role, then RBAC is enabled
+	// If the service account allowed to list resource quotas after given rbac role, then RBAC is enabled
 	return allowed, nil
 }
 
@@ -80,13 +84,13 @@ func createServiceAccount(saClient corev1types.ServiceAccountInterface, name str
 			Namespace: namespace,
 		},
 	}
+
 	_, err := saClient.Create(context.Background(), serviceAccount, metav1.CreateOptions{})
 	return err
 }
 
 func deleteServiceAccount(saClient corev1types.ServiceAccountInterface, name string) {
-	err := saClient.Delete(context.Background(), name, metav1.DeleteOptions{})
-	if err != nil {
+	if err := saClient.Delete(context.Background(), name, metav1.DeleteOptions{}); err != nil {
 		log.Error().Err(err).Msg("Error deleting service account: " + name)
 	}
 }
@@ -105,13 +109,13 @@ func createRole(roleClient rbacv1types.RoleInterface, name string, verb string,
 			},
 		},
 	}
+
 	_, err := roleClient.Create(context.Background(), role, metav1.CreateOptions{})
 	return err
 }
 
 func deleteRole(roleClient rbacv1types.RoleInterface, name string) {
-	err := roleClient.Delete(context.Background(), name, metav1.DeleteOptions{})
-	if err != nil {
+	if err := roleClient.Delete(context.Background(), name, metav1.DeleteOptions{}); err != nil {
 		log.Error().Err(err).Msg("Error deleting role: " + name)
 	}
 }
@@ -134,17 +138,19 @@ func createRoleBinding(roleBindingClient rbacv1types.RoleBindingInterface, clust
 			APIGroup: "rbac.authorization.k8s.io",
 		},
 	}
+
 	roleBinding, err := roleBindingClient.Create(context.Background(), clusterRoleBinding, metav1.CreateOptions{})
 	if err != nil {
 		log.Error().Err(err).Msg("Error creating role binding: " + clusterRoleBindingName)
+
 		return err
 	}
 
 	// Retry checkRoleBinding a maximum of 5 times with a 100ms wait after each attempt
-	maxRetries := 5
-	for i := 0; i < maxRetries; i++ {
+	for range maxRetries {
 		err = checkRoleBinding(roleBindingClient, roleBinding.Name)
 		time.Sleep(100 * time.Millisecond) // Wait for 100ms, even if the check passes
+
 		if err == nil {
 			break
 		}
@@ -154,17 +160,17 @@ func createRoleBinding(roleBindingClient rbacv1types.RoleBindingInterface, clust
 }
 
 func checkRoleBinding(roleBindingClient rbacv1types.RoleBindingInterface, name string) error {
-	_, err := roleBindingClient.Get(context.Background(), name, metav1.GetOptions{})
-	if err != nil {
+	if _, err := roleBindingClient.Get(context.Background(), name, metav1.GetOptions{}); err != nil {
 		log.Error().Err(err).Msg("Error finding rolebinding: " + name)
+
 		return err
 	}
+
 	return nil
 }
 
 func deleteRoleBinding(roleBindingClient rbacv1types.RoleBindingInterface, name string) {
-	err := roleBindingClient.Delete(context.Background(), name, metav1.DeleteOptions{})
-	if err != nil {
+	if err := roleBindingClient.Delete(context.Background(), name, metav1.DeleteOptions{}); err != nil {
 		log.Error().Err(err).Msg("Error deleting role binding: " + name)
 	}
 }
@@ -183,9 +189,11 @@ func checkServiceAccountAccess(accessReviewClient authv1types.LocalSubjectAccess
 			User: "system:serviceaccount:default:" + serviceAccountName, // a workaround to be able to use the service account as a user
 		},
 	}
+
 	result, err := accessReviewClient.Create(context.Background(), subjectAccessReview, metav1.CreateOptions{})
 	if err != nil {
 		return false, err
 	}
+
 	return result.Status.Allowed, nil
 }

api/stacks/deployments/compose_unpacker_cmd_builder.go

@@ -50,13 +50,12 @@ var funcmap = map[StackRemoteOperation]buildCmdFunc{
 
 // build the unpacker cmd for stack based on stackOperation
 func (d *stackDeployer) buildUnpackerCmdForStack(stack *portainer.Stack, operation StackRemoteOperation, opts unpackerCmdBuilderOptions) ([]string, error) {
-
 	fn := funcmap[operation]
 	if fn == nil {
 		return nil, fmt.Errorf("unknown stack operation %s", operation)
 	}
 
-	registriesStrings := getRegistry(opts.registries, d.dataStore)
+	registriesStrings := generateRegistriesStrings(opts.registries, d.dataStore)
 	envStrings := getEnv(stack.Env)
 
 	return fn(stack, opts, registriesStrings, envStrings), nil
@@ -64,72 +63,74 @@ func (d *stackDeployer) buildUnpackerCmdForStack(stack *portainer.Stack, operati
 
 // deploy [-u username -p password] [--skip-tls-verify] [--env KEY1=VALUE1 --env KEY2=VALUE2] <git-repo-url> <ref> <project-name> <destination> <compose-file-path> [<more-file-paths>...]
 func buildDeployCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions, registries []string, env []string) []string {
-	cmd := []string{}
-	cmd = append(cmd, UnpackerCmdDeploy)
+	cmd := []string{UnpackerCmdDeploy}
 	cmd = appendGitAuthIfNeeded(cmd, stack)
 	cmd = appendSkipTLSVerifyIfNeeded(cmd, stack)
 	cmd = append(cmd, env...)
 	cmd = append(cmd, registries...)
-	cmd = append(cmd, stack.GitConfig.URL)
-	cmd = append(cmd, stack.GitConfig.ReferenceName)
-	cmd = append(cmd, stack.Name)
-	cmd = append(cmd, opts.composeDestination)
-	cmd = append(cmd, stack.EntryPoint)
-	cmd = appendAdditionalFiles(cmd, stack.AdditionalFiles)
-	return cmd
+	cmd = append(cmd,
+		stack.GitConfig.URL,
+		stack.GitConfig.ReferenceName,
+		stack.Name,
+		opts.composeDestination,
+		stack.EntryPoint,
+	)
+
+	return append(cmd, stack.AdditionalFiles...)
 }
 
 // undeploy [-u username -p password] [-k] <git-repo-url> <project-name> <destination> <compose-file-path> [<more-file-paths>...]
 func buildUndeployCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions, registries []string, env []string) []string {
-	cmd := []string{}
-	cmd = append(cmd, UnpackerCmdUndeploy)
+	cmd := []string{UnpackerCmdUndeploy}
 	cmd = appendGitAuthIfNeeded(cmd, stack)
-	cmd = append(cmd, stack.GitConfig.URL)
-	cmd = append(cmd, stack.Name)
-	cmd = append(cmd, opts.composeDestination)
-	cmd = append(cmd, stack.EntryPoint)
-	cmd = appendAdditionalFiles(cmd, stack.AdditionalFiles)
-	return cmd
+	cmd = append(cmd, stack.GitConfig.URL,
+		stack.Name,
+		opts.composeDestination,
+		stack.EntryPoint,
+	)
+
+	return append(cmd, stack.AdditionalFiles...)
 }
 
 // deploy [-u username -p password] [--skip-tls-verify] [-k] [--env KEY1=VALUE1 --env KEY2=VALUE2] <git-repo-url> <project-name> <destination> <compose-file-path> [<more-file-paths>...]
 func buildComposeStartCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions, registries []string, env []string) []string {
-	cmd := []string{}
-	cmd = append(cmd, UnpackerCmdDeploy)
+	cmd := []string{UnpackerCmdDeploy}
 	cmd = appendGitAuthIfNeeded(cmd, stack)
 	cmd = appendSkipTLSVerifyIfNeeded(cmd, stack)
 	cmd = append(cmd, "-k")
 	cmd = append(cmd, env...)
 	cmd = append(cmd, registries...)
-	cmd = append(cmd, stack.GitConfig.URL)
-	cmd = append(cmd, stack.GitConfig.ReferenceName)
-	cmd = append(cmd, stack.Name)
-	cmd = append(cmd, opts.composeDestination)
-	cmd = append(cmd, stack.EntryPoint)
-	cmd = appendAdditionalFiles(cmd, stack.AdditionalFiles)
-	return cmd
+	cmd = append(cmd, stack.GitConfig.URL,
+		stack.GitConfig.ReferenceName,
+		stack.Name,
+		opts.composeDestination,
+		stack.EntryPoint,
+	)
+
+	return append(cmd, stack.AdditionalFiles...)
 }
 
 // undeploy [-u username -p password] [-k] <git-repo-url> <project-name> <destination> <compose-file-path> [<more-file-paths>...]
 func buildComposeStopCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions, registries []string, env []string) []string {
-	cmd := []string{}
-	cmd = append(cmd, UnpackerCmdUndeploy)
+	cmd := []string{UnpackerCmdUndeploy}
 	cmd = appendGitAuthIfNeeded(cmd, stack)
-	cmd = append(cmd, "-k")
-	cmd = append(cmd, stack.GitConfig.URL)
-	cmd = append(cmd, stack.Name)
-	cmd = append(cmd, opts.composeDestination)
-	cmd = append(cmd, stack.EntryPoint)
-	cmd = appendAdditionalFiles(cmd, stack.AdditionalFiles)
-	return cmd
+	cmd = append(cmd,
+		"-k",
+		stack.GitConfig.URL,
+		stack.Name,
+		opts.composeDestination,
+		stack.EntryPoint,
+	)
+
+	return append(cmd, stack.AdditionalFiles...)
 }
 
 // swarm-deploy [-u username -p password] [--skip-tls-verify] [-f] [-r] [--env KEY1=VALUE1 --env KEY2=VALUE2] <git-repo-url> <git-ref> <project-name> <destination> <compose-file-path> [<more-file-paths>...]
 func buildSwarmDeployCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions, registries []string, env []string) []string {
-	cmd := []string{}
-	cmd = append(cmd, UnpackerCmdSwarmDeploy)
+	cmd := []string{UnpackerCmdSwarmDeploy}
 	cmd = appendGitAuthIfNeeded(cmd, stack)
 	cmd = appendSkipTLSVerifyIfNeeded(cmd, stack)
+
 	if opts.pullImage {
 		cmd = append(cmd, "-f")
 	}
@@ -137,85 +138,76 @@ func buildSwarmDeployCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions,
 	if opts.prune {
 		cmd = append(cmd, "-r")
 	}
+
 	cmd = append(cmd, env...)
 	cmd = append(cmd, registries...)
-	cmd = append(cmd, stack.GitConfig.URL)
-	cmd = append(cmd, stack.GitConfig.ReferenceName)
-	cmd = append(cmd, stack.Name)
-	cmd = append(cmd, opts.composeDestination)
-	cmd = append(cmd, stack.EntryPoint)
-	cmd = appendAdditionalFiles(cmd, stack.AdditionalFiles)
-	return cmd
+	cmd = append(cmd, stack.GitConfig.URL,
+		stack.GitConfig.ReferenceName,
+		stack.Name,
+		opts.composeDestination,
+		stack.EntryPoint,
+	)
+
+	return append(cmd, stack.AdditionalFiles...)
 }
 
 // swarm-undeploy [-k] <project-name> <destination>
 func buildSwarmUndeployCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions, registries []string, env []string) []string {
-	cmd := []string{}
-	cmd = append(cmd, UnpackerCmdSwarmUndeploy)
-	cmd = append(cmd, stack.Name)
-	cmd = append(cmd, opts.composeDestination)
-	return cmd
+	return []string{UnpackerCmdSwarmUndeploy, stack.Name, opts.composeDestination}
 }
 
 // swarm-deploy [-u username -p password] [-f] [-r] [-k] [--skip-tls-verify] [--env KEY1=VALUE1 --env KEY2=VALUE2] <git-repo-url> <project-name> <destination> <compose-file-path> [<more-file-paths>...]
 func buildSwarmStartCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions, registries []string, env []string) []string {
-	cmd := []string{}
-	cmd = append(cmd, UnpackerCmdSwarmDeploy, "-f", "-r", "-k")
+	cmd := []string{UnpackerCmdSwarmDeploy, "-f", "-r", "-k"}
 	cmd = appendSkipTLSVerifyIfNeeded(cmd, stack)
 	cmd = append(cmd, getEnv(stack.Env)...)
 	cmd = append(cmd, registries...)
-	cmd = append(cmd, stack.GitConfig.URL)
-	cmd = append(cmd, stack.GitConfig.ReferenceName)
-	cmd = append(cmd, stack.Name)
-	cmd = append(cmd, opts.composeDestination)
-	cmd = append(cmd, stack.EntryPoint)
-	cmd = appendAdditionalFiles(cmd, stack.AdditionalFiles)
-	return cmd
+	cmd = append(cmd, stack.GitConfig.URL,
+		stack.GitConfig.ReferenceName,
+		stack.Name,
+		opts.composeDestination,
+		stack.EntryPoint,
+	)
+
+	return append(cmd, stack.AdditionalFiles...)
 }
 
 // swarm-undeploy [-k] <project-name> <destination>
 func buildSwarmStopCmd(stack *portainer.Stack, opts unpackerCmdBuilderOptions, registries []string, env []string) []string {
-	cmd := []string{}
-	cmd = append(cmd, UnpackerCmdSwarmUndeploy, "-k")
-	cmd = append(cmd, stack.Name)
-	cmd = append(cmd, opts.composeDestination)
-	return cmd
+	return []string{UnpackerCmdSwarmUndeploy, "-k", stack.Name, opts.composeDestination}
 }
 
 func appendGitAuthIfNeeded(cmd []string, stack *portainer.Stack) []string {
-	if stack.GitConfig.Authentication != nil && len(stack.GitConfig.Authentication.Password) != 0 {
-		cmd = append(cmd, "-u", stack.GitConfig.Authentication.Username, "-p", stack.GitConfig.Authentication.Password)
+	if stack.GitConfig.Authentication == nil || stack.GitConfig.Authentication.Password == "" {
+		return cmd
 	}
-	return cmd
+
+	return append(cmd, "-u", stack.GitConfig.Authentication.Username, "-p", stack.GitConfig.Authentication.Password)
 }
 
 func appendSkipTLSVerifyIfNeeded(cmd []string, stack *portainer.Stack) []string {
-	if stack.GitConfig.TLSSkipVerify {
-		cmd = append(cmd, "--skip-tls-verify")
+	if !stack.GitConfig.TLSSkipVerify {
+		return cmd
 	}
-	return cmd
+
+	return append(cmd, "--skip-tls-verify")
 }
 
-func appendAdditionalFiles(cmd []string, files []string) []string {
-	for i := 0; i < len(files); i++ {
-		cmd = append(cmd, files[i])
-	}
-	return cmd
-}
-
-func getRegistry(registries []portainer.Registry, dataStore dataservices.DataStore) []string {
+func generateRegistriesStrings(registries []portainer.Registry, dataStore dataservices.DataStore) []string {
 	cmds := []string{}
 
 	for _, registry := range registries {
 		if registry.Authentication {
-			err := registryutils.EnsureRegTokenValid(dataStore, &registry)
-			if err == nil {
-				username, password, err := registryutils.GetRegEffectiveCredential(&registry)
-				if err == nil {
-					cmd := fmt.Sprintf("--registry=%s:%s:%s", username, password, registry.URL)
-					cmds = append(cmds, cmd)
-				}
+			if err := registryutils.EnsureRegTokenValid(dataStore, &registry); err != nil {
+				continue
 			}
+
+			username, password, err := registryutils.GetRegEffectiveCredential(&registry)
+			if err != nil {
+				continue
+			}
+
+			cmds = append(cmds, fmt.Sprintf("--registry=%s:%s:%s", username, password, registry.URL))
 		}
 	}