Implement stricter golangci-lint configurations (#259)

* Fix whitespace and false positivies on duplicates

* Fix no context on http request

* Ignore long lines on function definitions

* Add golangci yaml configuration file

* Resolve gocritic issues

* Constantify the instance response

* Ignore false positives on duplicates

.golangci.yaml

@@ -0,0 +1,135 @@
+linters-settings:
+  dupl:
+    threshold: 100
+  funlen:
+    lines: -1 # the number of lines (code + empty lines) is not a right metric and leads to code without empty line or one-liner.
+    statements: 50
+  goconst:
+    min-len: 2
+    min-occurrences: 3
+  gocritic:
+    enabled-tags:
+      - diagnostic
+      - experimental
+      - opinionated
+      - performance
+      - style
+    disabled-checks:
+      - dupImport # https://github.com/go-critic/go-critic/issues/845
+      - ifElseChain
+      - octalLiteral
+      - whyNoLint
+  gocyclo:
+    min-complexity: 15
+  goimports:
+    local-prefixes: github.com/golangci/golangci-lint
+  gomnd:
+    # don't include the "operation" and "assign"
+    checks:
+      - argument
+      - case
+      - condition
+      - return
+    ignored-numbers:
+      - '0'
+      - '1'
+      - '2'
+      - '3'
+    ignored-functions:
+      - strings.SplitN
+
+  govet:
+    check-shadowing: true
+    settings:
+      printf:
+        funcs:
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Infof
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Warnf
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Errorf
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Fatalf
+  lll:
+    line-length: 140
+  misspell:
+    locale: US
+  nolintlint:
+    allow-unused: false # report any unused nolint directives
+    require-explanation: false # don't require an explanation for nolint directives
+    require-specific: false # don't require nolint directives to be specific about which linter is being skipped
+  revive:
+    rules:
+      - name: unexported-return
+        disabled: true
+
+linters:
+  disable-all: true
+  enable:
+    - dogsled
+    - dupl
+    - errcheck
+    - exportloopref
+    - funlen
+    - gochecknoinits
+    - goconst
+    - gocritic
+    - gocyclo
+    - gofmt
+    - goimports
+    - gomnd
+    - goprintffuncname
+    - gosec
+    - gosimple
+    - govet
+    - ineffassign
+    - lll
+    - misspell
+    - nakedret
+    - noctx
+    - nolintlint
+    - revive
+    - staticcheck
+    - stylecheck
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - whitespace
+
+  # don't enable:
+  # - bodyclose
+  # - depguard
+  # - asciicheck
+  # - scopelint
+  # - gochecknoglobals
+  # - gocognit
+  # - godot
+  # - godox
+  # - goerr113
+  # - interfacer
+  # - maligned
+  # - nestif
+  # - prealloc
+  # - testpackage
+  # - wsl
+
+issues:
+  # List of regexps of issue texts to exclude.
+  #
+  # But independently of this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`.
+  # To list all excluded by default patterns execute `golangci-lint run --help`
+  #
+  # Default: https://golangci-lint.run/usage/false-positives/#default-exclusions
+  exclude:
+    - abcdef
+  exclude-rules:
+    # Exclude some linters from running on tests files.
+    - path: _test\.go
+      linters:
+        - gocyclo
+        - errcheck
+        - dupl
+        - gosec
+        - lll
+
+run:
+  timeout: 5m

account_test.go

@@ -12,9 +12,8 @@ func TestAccountServiceHandler_Get(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/account", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
-		{		
+		{
 		"account" : {
 			"balance": -5519.11,
 			"pending_charges": 57.03,

application.go

@@ -35,7 +35,7 @@ type applicationBase struct {
 }
 
 // List retrieves a list of available applications that can be launched when creating a Vultr instance
-func (a *ApplicationServiceHandler) List(ctx context.Context, options *ListOptions) ([]Application, *Meta, *http.Response, error) {
+func (a *ApplicationServiceHandler) List(ctx context.Context, options *ListOptions) ([]Application, *Meta, *http.Response, error) { //nolint:dupl,lll
 	uri := "/v2/applications"
 
 	req, err := a.client.NewRequest(ctx, http.MethodGet, uri, nil)

application_test.go

@@ -12,7 +12,6 @@ func TestApplicationServiceHandler_List(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/applications", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 		"applications": [

backup.go

@@ -57,7 +57,7 @@ func (b *BackupServiceHandler) Get(ctx context.Context, backupID string) (*Backu
 }
 
 // List retrieves a list of all backups on the current account
-func (b *BackupServiceHandler) List(ctx context.Context, options *ListOptions) ([]Backup, *Meta, *http.Response, error) {
+func (b *BackupServiceHandler) List(ctx context.Context, options *ListOptions) ([]Backup, *Meta, *http.Response, error) { //nolint:dupl
 	uri := "/v2/backups"
 	req, err := b.client.NewRequest(ctx, http.MethodGet, uri, nil)
 

backup_test.go

@@ -12,7 +12,6 @@ func TestBackupServiceHandler_List(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/backups", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"backups": [
@@ -71,7 +70,6 @@ func TestBackupServiceHandler_ListEmpty(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/backups", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"backups": [],
@@ -117,7 +115,6 @@ func TestBackupServiceHandler_Get(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/backups/543d34149403a", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"backup": {
@@ -156,7 +153,7 @@ func TestBackupServiceHandler_GetEmpty(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/backups/543d34149403a", func(w http.ResponseWriter, r *http.Request) {
-		response := `			
+		response := `
 			{
 				"backup": {}
 			}

bare_metal_server.go

@@ -122,7 +122,7 @@ type bareMetalBase struct {
 	BareMetal *BareMetalServer `json:"bare_metal"`
 }
 
-// BMBareMetalBase ...
+// BMBareMetalBase represents the base struct for a Bare Metal server
 type BMBareMetalBase struct {
 	BareMetalBandwidth map[string]BareMetalServerBandwidth `json:"bandwidth"`
 }
@@ -170,7 +170,7 @@ func (b *BareMetalServerServiceHandler) Get(ctx context.Context, serverID string
 }
 
 // Update a Bare Metal server
-func (b *BareMetalServerServiceHandler) Update(ctx context.Context, serverID string, bmReq *BareMetalUpdate) (*BareMetalServer, *http.Response, error) {
+func (b *BareMetalServerServiceHandler) Update(ctx context.Context, serverID string, bmReq *BareMetalUpdate) (*BareMetalServer, *http.Response, error) { //nolint:lll
 	uri := fmt.Sprintf("%s/%s", bmPath, serverID)
 	req, err := b.client.NewRequest(ctx, http.MethodPatch, uri, bmReq)
 	if err != nil {
@@ -198,7 +198,7 @@ func (b *BareMetalServerServiceHandler) Delete(ctx context.Context, serverID str
 }
 
 // List all Bare Metal instances in your account.
-func (b *BareMetalServerServiceHandler) List(ctx context.Context, options *ListOptions) ([]BareMetalServer, *Meta, *http.Response, error) {
+func (b *BareMetalServerServiceHandler) List(ctx context.Context, options *ListOptions) ([]BareMetalServer, *Meta, *http.Response, error) { //nolint:dupl,lll
 	req, err := b.client.NewRequest(ctx, http.MethodGet, bmPath, nil)
 	if err != nil {
 		return nil, nil, nil, err
@@ -273,7 +273,7 @@ func (b *BareMetalServerServiceHandler) GetVNCUrl(ctx context.Context, serverID
 
 // ListIPv4s information of a Bare Metal server.
 // IP information is only available for Bare Metal servers in the "active" state.
-func (b *BareMetalServerServiceHandler) ListIPv4s(ctx context.Context, serverID string, options *ListOptions) ([]IPv4, *Meta, *http.Response, error) {
+func (b *BareMetalServerServiceHandler) ListIPv4s(ctx context.Context, serverID string, options *ListOptions) ([]IPv4, *Meta, *http.Response, error) { //nolint:lll,dupl
 	uri := fmt.Sprintf("%s/%s/ipv4", bmPath, serverID)
 	req, err := b.client.NewRequest(ctx, http.MethodGet, uri, nil)
 	if err != nil {
@@ -299,7 +299,7 @@ func (b *BareMetalServerServiceHandler) ListIPv4s(ctx context.Context, serverID
 // ListIPv6s information of a Bare Metal server.
 // IP information is only available for Bare Metal servers in the "active" state.
 // If the Bare Metal server does not have IPv6 enabled, then an empty array is returned.
-func (b *BareMetalServerServiceHandler) ListIPv6s(ctx context.Context, serverID string, options *ListOptions) ([]IPv6, *Meta, *http.Response, error) {
+func (b *BareMetalServerServiceHandler) ListIPv6s(ctx context.Context, serverID string, options *ListOptions) ([]IPv6, *Meta, *http.Response, error) { //nolint:lll,dupl
 	uri := fmt.Sprintf("%s/%s/ipv6", bmPath, serverID)
 	req, err := b.client.NewRequest(ctx, http.MethodGet, uri, nil)
 	if err != nil {

bare_metal_server_test.go

@@ -642,7 +642,6 @@ func TestBareMetalServerServiceHandler_GetUpgrades(t *testing.T) {
 
 	if !reflect.DeepEqual(server, expected) {
 		t.Errorf("BareMetalServer.GetUpgrades returned %+v, expected %+v", server, expected)
-
 	}
 }
 func TestBareMetalServerServiceHandler_GetVNCUrl(t *testing.T) {

billing.go

@@ -73,7 +73,7 @@ type invoiceItemsBase struct {
 }
 
 // ListHistory retrieves a list of all billing history on the current account
-func (b *BillingServiceHandler) ListHistory(ctx context.Context, options *ListOptions) ([]History, *Meta, *http.Response, error) {
+func (b *BillingServiceHandler) ListHistory(ctx context.Context, options *ListOptions) ([]History, *Meta, *http.Response, error) { //nolint:dupl,lll
 	uri := "/v2/billing/history"
 	req, err := b.client.NewRequest(ctx, http.MethodGet, uri, nil)
 	if err != nil {
@@ -97,7 +97,7 @@ func (b *BillingServiceHandler) ListHistory(ctx context.Context, options *ListOp
 }
 
 // ListInvoices retrieves a list of all billing invoices on the current account
-func (b *BillingServiceHandler) ListInvoices(ctx context.Context, options *ListOptions) ([]Invoice, *Meta, *http.Response, error) {
+func (b *BillingServiceHandler) ListInvoices(ctx context.Context, options *ListOptions) ([]Invoice, *Meta, *http.Response, error) { //nolint:dupl,lll
 	uri := "/v2/billing/invoices"
 	req, err := b.client.NewRequest(ctx, http.MethodGet, uri, nil)
 	if err != nil {
@@ -139,7 +139,7 @@ func (b *BillingServiceHandler) GetInvoice(ctx context.Context, invoiceID string
 }
 
 // ListInvoiceItems retrieves items in an invoice that matches the given invoiceID
-func (b *BillingServiceHandler) ListInvoiceItems(ctx context.Context, invoiceID int, options *ListOptions) ([]InvoiceItem, *Meta, *http.Response, error) {
+func (b *BillingServiceHandler) ListInvoiceItems(ctx context.Context, invoiceID int, options *ListOptions) ([]InvoiceItem, *Meta, *http.Response, error) { //nolint:dupl,lll
 	uri := fmt.Sprintf("/v2/billing/invoices/%d/items", invoiceID)
 	req, err := b.client.NewRequest(ctx, http.MethodGet, uri, nil)
 	if err != nil {

billing_test.go

@@ -12,7 +12,6 @@ func TestBillingServiceHandler_ListHistory(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/billing/history", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"billing_history": [
@@ -73,7 +72,6 @@ func TestBillingServiceHandler_ListInvoices(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/billing/invoices", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"billing_invoices": [
@@ -132,7 +130,6 @@ func TestBillingServiceHandler_ListHistoryEmpty(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/billing/history", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"billing_history": [],
@@ -178,7 +175,6 @@ func TestBillingServiceHandler_ListInvoicesEmpty(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/billing/invoices", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"billing_invoices": [],
@@ -224,7 +220,6 @@ func TestBillingServiceHandler_GetInvoice(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/billing/invoices/123456", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"billing_invoice": {
@@ -263,7 +258,6 @@ func TestBillingServiceHandler_ListInvoiceItems(t *testing.T) {
 	defer teardown()
 
 	mux.HandleFunc("/v2/billing/invoices/123456/items", func(w http.ResponseWriter, r *http.Request) {
-
 		response := `
 		{
 			"invoice_items": [

block_storage.go

@@ -135,7 +135,7 @@ func (b *BlockStorageServiceHandler) Delete(ctx context.Context, blockID string)
 }
 
 // List returns a list of all block storage instances on your Vultr Account
-func (b *BlockStorageServiceHandler) List(ctx context.Context, options *ListOptions) ([]BlockStorage, *Meta, *http.Response, error) {
+func (b *BlockStorageServiceHandler) List(ctx context.Context, options *ListOptions) ([]BlockStorage, *Meta, *http.Response, error) { //nolint:dupl,lll
 	uri := "/v2/blocks"
 
 	req, err := b.client.NewRequest(ctx, http.MethodGet, uri, nil)