Enable golangci-lint and fix issues

.github/workflows/unit.yml

@@ -1,5 +1,5 @@
-on: [push, pull_request]
 name: Unit Testing
+on: [push, pull_request]
 jobs:
   test:
     runs-on: ubuntu-latest
@@ -9,33 +9,19 @@ jobs:
         go-version:
           - "1.22"
 
-    env:
-      GO111MODULE: "on"
-
     steps:
+      - name: Checkout source
+        uses: actions/checkout@v5
+
       - name: Setup Go ${{ matrix.go-version }}
         uses: actions/setup-go@v5
         with:
           go-version: ${{ matrix.go-version }}
 
-      - uses: actions/checkout@v5
-
-      - name: Setup environment
+      - name: Run linters
         run: |
-          # Changing into a different directory to avoid polluting go.sum with "go get"
-          cd "$(mktemp -d)"
-          go mod init unit_tests
-
-          go install golang.org/x/tools/cmd/goimports@latest
-
-      - name: Run go vet
-        run: |
-          go vet ./...
+          make lint
 
       - name: Run unit tests
         run: |
-          go test -v ./...
-
-      - name: Check for formatting
-        run:
-          ./script/format
+          make unit

.golangci.yaml

@@ -0,0 +1,30 @@
+version: "2"
+linters:
+  default: none
+  enable:
+    - errcheck
+    - govet
+    - staticcheck
+    - unparam
+    - unused
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gofmt
+    - goimports
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

Makefile

@@ -0,0 +1,43 @@
+undefine GOFLAGS
+
+GOLANGCI_LINT_VERSION?=v2.1.6
+GOTESTSUM_VERSION?=v1.12.2
+GO_TEST?=go run gotest.tools/gotestsum@$(GOTESTSUM_VERSION) --format testname --
+TIMEOUT := "60m"
+
+ifeq ($(shell command -v podman 2> /dev/null),)
+	RUNNER=docker
+else
+	RUNNER=podman
+endif
+
+# if the golangci-lint steps fails with one of the following error messages:
+#
+#   directory prefix . does not contain main module or its selected dependencies
+#
+#   failed to initialize build cache at /root/.cache/golangci-lint: mkdir /root/.cache/golangci-lint: permission denied
+#
+# you probably have to fix the SELinux security context for root directory plus your cache
+#
+#   chcon -Rt svirt_sandbox_file_t .
+#   chcon -Rt svirt_sandbox_file_t ~/.cache/golangci-lint
+lint:
+	mkdir -p ~/.cache/golangci-lint/$(GOLANGCI_LINT_VERSION)
+	$(RUNNER) run -t --rm \
+		-v $(shell pwd):/app \
+		-v ~/.cache/golangci-lint/$(GOLANGCI_LINT_VERSION):/root/.cache \
+		-w /app \
+		golangci/golangci-lint:$(GOLANGCI_LINT_VERSION) golangci-lint run -v --max-same-issues 50
+.PHONY: lint
+
+format:
+	gofmt -w -s $(shell pwd)
+.PHONY: format
+
+unit:
+	$(GO_TEST) -shuffle on ./...
+.PHONY: unit
+
+coverage:
+	$(GO_TEST) -shuffle on -covermode count -coverprofile cover.out -coverpkg=./... ./...
+.PHONY: coverage

client/client.go

@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"net/http"
 	"sort"
@@ -19,22 +18,22 @@ import (
 
 // Logger is an interface representing the Logger struct
 type Logger interface {
-	Printf(format string, args ...interface{})
+	Printf(format string, args ...any)
 }
 
 // DefaultLogger is a default struct, which satisfies the Logger interface
 type DefaultLogger struct{}
 
 // Printf is a default Printf method
-func (DefaultLogger) Printf(format string, args ...interface{}) {
+func (DefaultLogger) Printf(format string, args ...any) {
 	log.Printf("[DEBUG] "+format, args...)
 }
 
 // noopLogger is a default noop logger satisfies the Logger interface
 type noopLogger struct{}
 
 // Printf is a default noop method
-func (noopLogger) Printf(format string, args ...interface{}) {}
+func (noopLogger) Printf(format string, args ...any) {}
 
 // RoundTripper satisfies the http.RoundTripper interface and is used to
 // customize the default http client RoundTripper
@@ -101,9 +100,7 @@ func (rt *RoundTripper) SetHeaders(headers http.Header) {
 	newHeaders := make(http.Header, len(headers))
 	for k, v := range headers {
 		s := make([]string, len(v))
-		for i, v := range v {
-			s[i] = v
-		}
+		copy(s, v)
 		newHeaders[k] = s
 	}
 
@@ -181,7 +178,7 @@ func (rt *RoundTripper) RoundTrip(request *http.Request) (*http.Response, error)
 	// this is concurrency safe
 	ort := rt.Rt
 	if ort == nil {
-		return nil, fmt.Errorf("Rt RoundTripper is nil, aborting")
+		return nil, fmt.Errorf("Rt RoundTripper is nil, aborting") //nolint
 	}
 	response, err := ort.RoundTrip(request)
 
@@ -232,7 +229,7 @@ func (rt *RoundTripper) logRequest(original io.ReadCloser, contentType string) (
 		}
 		rt.log().Printf("OpenStack Request Body: %s", debugInfo)
 
-		return ioutil.NopCloser(strings.NewReader(bs.String())), nil
+		return io.NopCloser(strings.NewReader(bs.String())), nil
 	}
 
 	rt.log().Printf("Not logging because OpenStack request body isn't JSON")
@@ -259,7 +256,7 @@ func (rt *RoundTripper) logResponse(original io.ReadCloser, contentType string)
 			rt.log().Printf("OpenStack Response Body: %s", debugInfo)
 		}
 
-		return ioutil.NopCloser(strings.NewReader(bs.String())), nil
+		return io.NopCloser(strings.NewReader(bs.String())), nil
 	}
 
 	rt.log().Printf("Not logging because OpenStack response body isn't JSON")
@@ -288,14 +285,14 @@ func (rt *RoundTripper) log() Logger {
 // FormatJSON is a default function to pretty-format a JSON body.
 // It will also mask known fields which contain sensitive information.
 func FormatJSON(raw []byte) (string, error) {
-	var rawData interface{}
+	var rawData any
 
 	err := json.Unmarshal(raw, &rawData)
 	if err != nil {
 		return string(raw), fmt.Errorf("unable to parse OpenStack JSON: %s", err)
 	}
 
-	data, ok := rawData.(map[string]interface{})
+	data, ok := rawData.(map[string]any)
 	if !ok {
 		pretty, err := json.MarshalIndent(rawData, "", "  ")
 		if err != nil {
@@ -306,32 +303,32 @@ func FormatJSON(raw []byte) (string, error) {
 	}
 
 	// Mask known password fields
-	if v, ok := data["auth"].(map[string]interface{}); ok {
+	if v, ok := data["auth"].(map[string]any); ok {
 		// v2 auth methods
-		if v, ok := v["passwordCredentials"].(map[string]interface{}); ok {
+		if v, ok := v["passwordCredentials"].(map[string]any); ok {
 			v["password"] = "***"
 		}
-		if v, ok := v["token"].(map[string]interface{}); ok {
+		if v, ok := v["token"].(map[string]any); ok {
 			v["id"] = "***"
 		}
 		// v3 auth methods
-		if v, ok := v["identity"].(map[string]interface{}); ok {
-			if v, ok := v["password"].(map[string]interface{}); ok {
-				if v, ok := v["user"].(map[string]interface{}); ok {
+		if v, ok := v["identity"].(map[string]any); ok {
+			if v, ok := v["password"].(map[string]any); ok {
+				if v, ok := v["user"].(map[string]any); ok {
 					v["password"] = "***"
 				}
 			}
-			if v, ok := v["application_credential"].(map[string]interface{}); ok {
+			if v, ok := v["application_credential"].(map[string]any); ok {
 				v["secret"] = "***"
 			}
-			if v, ok := v["token"].(map[string]interface{}); ok {
+			if v, ok := v["token"].(map[string]any); ok {
 				v["id"] = "***"
 			}
 		}
 	}
 
 	// Mask EC2 access id and body hash
-	if v, ok := data["credentials"].(map[string]interface{}); ok {
+	if v, ok := data["credentials"].(map[string]any); ok {
 		var access string
 		if s, ok := v["access"]; ok {
 			access, _ = s.(string)
@@ -340,17 +337,17 @@ func FormatJSON(raw []byte) (string, error) {
 		if _, ok := v["body_hash"]; ok {
 			v["body_hash"] = "***"
 		}
-		if v, ok := v["headers"].(map[string]interface{}); ok {
+		if v, ok := v["headers"].(map[string]any); ok {
 			if _, ok := v["Authorization"]; ok {
 				if s, ok := v["Authorization"].(string); ok {
-					v["Authorization"] = strings.Replace(s, access, "***", -1)
+					v["Authorization"] = strings.ReplaceAll(s, access, "***")
 				}
 			}
 		}
 	}
 
 	// Ignore the huge catalog output
-	if v, ok := data["token"].(map[string]interface{}); ok {
+	if v, ok := data["token"].(map[string]any); ok {
 		if _, ok := v["catalog"]; ok {
 			v["catalog"] = "***"
 		}

client/doc.go

@@ -66,8 +66,8 @@ Example usage with the custom logger:
 		Prefix string
 	}
 
-	func (l myLogger) Printf(format string, args ...interface{}) {
-		log.Debugf("%s [DEBUG] "+format, append([]interface{}{l.Prefix}, args...)...)
+	func (l myLogger) Printf(format string, args ...any) {
+		log.Debugf("%s [DEBUG] "+format, append([]any{l.Prefix}, args...)...)
 	}
 
 	func NewComputeV2Client() (*gophercloud.ServiceClient, error) {

gnocchi/metric/v1/archivepolicies/requests.go

@@ -23,7 +23,7 @@ func Get(ctx context.Context, c *gophercloud.ServiceClient, archivePolicyName st
 
 // CreateOptsBuilder allows extensions to add additional parameters to the Create request.
 type CreateOptsBuilder interface {
-	ToArchivePolicyCreateMap() (map[string]interface{}, error)
+	ToArchivePolicyCreateMap() (map[string]any, error)
 }
 
 // CreateOpts specifies parameters of a new Archive Policy.
@@ -62,7 +62,7 @@ type ArchivePolicyDefinitionOpts struct {
 }
 
 // ToArchivePolicyCreateMap constructs a request body from CreateOpts.
-func (opts CreateOpts) ToArchivePolicyCreateMap() (map[string]interface{}, error) {
+func (opts CreateOpts) ToArchivePolicyCreateMap() (map[string]any, error) {
 	return gophercloud.BuildRequestBody(opts, "")
 }
 
@@ -82,7 +82,7 @@ func Create(ctx context.Context, client *gophercloud.ServiceClient, opts CreateO
 
 // UpdateOptsBuilder allows extensions to add additional parameters to the Update request.
 type UpdateOptsBuilder interface {
-	ToArchivePolicyUpdateMap() (map[string]interface{}, error)
+	ToArchivePolicyUpdateMap() (map[string]any, error)
 }
 
 // UpdateOpts represents options used to update an archive policy.
@@ -93,7 +93,7 @@ type UpdateOpts struct {
 }
 
 // ToArchivePolicyUpdateMap constructs a request body from UpdateOpts.
-func (opts UpdateOpts) ToArchivePolicyUpdateMap() (map[string]interface{}, error) {
+func (opts UpdateOpts) ToArchivePolicyUpdateMap() (map[string]any, error) {
 	return gophercloud.BuildRequestBody(opts, "")
 }
 

gnocchi/metric/v1/archivepolicies/testing/requests_test.go

@@ -23,7 +23,7 @@ func TestListArchivePolicies(t *testing.T) {
 		w.Header().Add("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
 
-		fmt.Fprintf(w, ArchivePoliciesListResult)
+		fmt.Fprint(w, ArchivePoliciesListResult)
 	})
 
 	expected := ListArchivePoliciesExpected
@@ -56,7 +56,7 @@ func TestListArchivePoliciesAllPages(t *testing.T) {
 		w.Header().Add("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
 
-		fmt.Fprintf(w, ArchivePoliciesListResult)
+		fmt.Fprint(w, ArchivePoliciesListResult)
 	})
 
 	allPages, err := archivepolicies.List(fake.ServiceClient()).AllPages(context.TODO())
@@ -76,7 +76,7 @@ func TestGetArchivePolicy(t *testing.T) {
 		w.Header().Add("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
 
-		fmt.Fprintf(w, ArchivePolicyGetResult)
+		fmt.Fprint(w, ArchivePolicyGetResult)
 	})
 
 	s, err := archivepolicies.Get(context.TODO(), fake.ServiceClient(), "test_policy").Extract()
@@ -117,7 +117,7 @@ func TestCreate(t *testing.T) {
 		w.Header().Add("Content-Type", "application/json")
 		w.WriteHeader(http.StatusCreated)
 
-		fmt.Fprintf(w, ArchivePolicyCreateResponse)
+		fmt.Fprint(w, ArchivePolicyCreateResponse)
 	})
 
 	opts := archivepolicies.CreateOpts{
@@ -177,7 +177,7 @@ func TestUpdateArchivePolicy(t *testing.T) {
 		w.Header().Add("Content-Type", "application/json")
 		w.WriteHeader(http.StatusOK)
 
-		fmt.Fprintf(w, ArchivePolicyUpdateResponse)
+		fmt.Fprint(w, ArchivePolicyUpdateResponse)
 	})
 
 	updateOpts := archivepolicies.UpdateOpts{