chore: enable all rules of perfsprint linter

.golangci.yml

@@ -18,8 +18,6 @@ issues:
       text: "exitAfterDefer"
     - linters: [gocritic]
       text: "appendAssign"
-    - linters:  [perfsprint]
-      text: "fmt.Sprintf can be replaced"
   exclude-dirs-use-default: false
   exclude-dirs:
     - mocks
@@ -160,15 +158,15 @@ linters-settings:
       - shadow
   perfsprint:
     # Optimizes even if it requires an int or uint type cast.
-    int-conversion: false
+    int-conversion: true
     # Optimizes into `err.Error()` even if it is only equivalent for non-nil errors.
     err-error: true
     # Optimizes `fmt.Errorf`.
     errorf: true
     # Optimizes `fmt.Sprintf` with only one argument.
-    sprintf1: false
+    sprintf1: true
     # Optimizes into strings concatenation.
-    strconcat: false
+    strconcat: true
   revive:
       ignore-generated-header: true
       severity: error

cmd/agent/app/reporter/flags.go

@@ -5,7 +5,6 @@ package reporter
 
 import (
 	"flag"
-	"fmt"
 
 	"github.com/spf13/viper"
 	"go.uber.org/zap"
@@ -34,7 +33,7 @@ type Options struct {
 
 // AddFlags adds flags for Options.
 func AddFlags(flagSet *flag.FlagSet) {
-	flagSet.String(reporterType, string(GRPC), fmt.Sprintf("Reporter type to use e.g. %s", string(GRPC)))
+	flagSet.String(reporterType, string(GRPC), "Reporter type to use e.g. "+string(GRPC))
 	if !setupcontext.IsAllInOne() {
 		flagSet.String(agentTags, "", "One or more tags to be added to the Process tags of all spans passing through this agent. Ex: key1=value1,key2=${envVar:defaultValue}")
 	}

cmd/collector/app/server/http_test.go

@@ -9,6 +9,7 @@ import (
 	"net"
 	"net/http"
 	"net/http/httptest"
+	"strconv"
 	"testing"
 	"time"
 
@@ -207,7 +208,7 @@ func TestSpanCollectorHTTPS(t *testing.T) {
 			defer test.clientTLS.Close()
 			require.NoError(t, err0)
 			dialer := &net.Dialer{Timeout: 2 * time.Second}
-			conn, clientError := tls.DialWithDialer(dialer, "tcp", "localhost:"+fmt.Sprintf("%d", ports.CollectorHTTP), clientTLSCfg)
+			conn, clientError := tls.DialWithDialer(dialer, "tcp", "localhost:"+strconv.Itoa(ports.CollectorHTTP), clientTLSCfg)
 			var clientClose func() error
 			clientClose = nil
 			if conn != nil {
@@ -230,7 +231,7 @@ func TestSpanCollectorHTTPS(t *testing.T) {
 				},
 			}
 
-			response, requestError := client.Post("https://localhost:"+fmt.Sprintf("%d", ports.CollectorHTTP), "", nil)
+			response, requestError := client.Post("https://localhost:"+strconv.Itoa(ports.CollectorHTTP), "", nil)
 
 			if test.expectClientError {
 				require.Error(t, requestError)

cmd/ingester/app/consumer/consumer_test.go

@@ -5,7 +5,7 @@ package consumer
 
 import (
 	"errors"
-	"fmt"
+	"strconv"
 	"sync"
 	"testing"
 	"time"
@@ -163,7 +163,7 @@ func TestSaramaConsumerWrapper_start_Messages(t *testing.T) {
 
 	tags := map[string]string{
 		"topic":     topic,
-		"partition": fmt.Sprint(partition),
+		"partition": strconv.Itoa(int(partition)),
 	}
 	localFactory.AssertCounterMetrics(t, metricstest.ExpectedMetric{
 		Name:  "sarama-consumer.messages",
@@ -217,7 +217,7 @@ func TestSaramaConsumerWrapper_start_Errors(t *testing.T) {
 
 		tags := map[string]string{
 			"topic":     topic,
-			"partition": fmt.Sprint(partition),
+			"partition": strconv.Itoa(int(partition)),
 		}
 		localFactory.AssertCounterMetrics(t, metricstest.ExpectedMetric{
 			Name:  "sarama-consumer.errors",

cmd/internal/status/command.go

@@ -58,7 +58,7 @@ func flags(flagSet *flag.FlagSet, adminPort int) *flag.FlagSet {
 
 func convert(httpHostPort string) string {
 	if strings.HasPrefix(httpHostPort, ":") {
-		return fmt.Sprintf("http://127.0.0.1%s", httpHostPort)
+		return "http://127.0.0.1" + httpHostPort
 	}
-	return fmt.Sprintf("http://%s", httpHostPort)
+	return "http://" + httpHostPort
 }

cmd/jaeger/internal/sanitizer/utf8_test.go

@@ -43,7 +43,7 @@ var utf8EncodingTests = []struct {
 		key:           invalidUTF8(),
 		value:         "value",
 		expectedKey:   "invalid-tag-key-1",
-		expectedValue: getBytesValueFromString(fmt.Sprintf("%s:value", invalidUTF8())),
+		expectedValue: getBytesValueFromString(invalidUTF8() + ":value"),
 	},
 	{
 		name:          "valid key + invalid value",
@@ -264,7 +264,7 @@ func TestUTF8Sanitizer_SanitizesNonStringAttributeValueWithInvalidKey(t *testing
 		Attributes().
 		Get("invalid-tag-key-1")
 	require.True(t, ok)
-	require.EqualValues(t, getBytesValueFromString(fmt.Sprintf("%s:99", invalidUTF8())), value)
+	require.EqualValues(t, getBytesValueFromString(invalidUTF8()+":99"), value)
 }
 
 func TestUTF8Sanitizer_SanitizesMultipleAttributesWithInvalidKeys(t *testing.T) {
@@ -290,8 +290,8 @@ func TestUTF8Sanitizer_SanitizesMultipleAttributesWithInvalidKeys(t *testing.T)
 	require.Equal(t, 2, got.Len())
 
 	expectedValues := []pcommon.Value{
-		getBytesValueFromString(fmt.Sprintf("%s:v1", k1)),
-		getBytesValueFromString(fmt.Sprintf("%s:v2", k2)),
+		getBytesValueFromString(k1 + ":v1"),
+		getBytesValueFromString(k2 + ":v2"),
 	}
 	value, ok := got.
 		Get("invalid-tag-key-1")

crossdock/services/common.go

@@ -4,10 +4,6 @@
 
 package services
 
-import (
-	"fmt"
-)
-
 func getTracerServiceName(service string) string {
-	return fmt.Sprintf("crossdock-%s", service)
+	return "crossdock-" + service
 }

crossdock/services/tracehandler_test.go

@@ -7,10 +7,10 @@ package services
 import (
 	"encoding/json"
 	"errors"
-	"fmt"
 	"io"
 	"net/http"
 	"net/http/httptest"
+	"strconv"
 	"sync"
 	"testing"
 	"time"
@@ -414,7 +414,7 @@ func TestAdaptiveSamplingTestInternal(t *testing.T) {
 	}
 
 	for i, test := range tests {
-		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
 			query := &mocks.QueryService{}
 			agent := &mocks.AgentService{}
 

examples/hotrod/pkg/log/spanlogger.go

@@ -6,6 +6,7 @@ package log
 
 import (
 	"fmt"
+	"strconv"
 	"time"
 
 	"go.opentelemetry.io/otel/attribute"
@@ -138,11 +139,11 @@ func (e *bridgeFieldEncoder) AddTime(key string, value time.Time) {
 }
 
 func (e *bridgeFieldEncoder) AddUint(key string, value uint) {
-	e.pairs = append(e.pairs, attribute.String(key, fmt.Sprintf("%d", value)))
+	e.pairs = append(e.pairs, attribute.String(key, strconv.FormatUint(uint64(value), 10)))
 }
 
 func (e *bridgeFieldEncoder) AddUint64(key string, value uint64) {
-	e.pairs = append(e.pairs, attribute.String(key, fmt.Sprintf("%d", value)))
+	e.pairs = append(e.pairs, attribute.String(key, strconv.FormatUint(value, 10)))
 }
 
 func (e *bridgeFieldEncoder) AddUint32(key string, value uint32) {

model/span_test.go

@@ -7,6 +7,7 @@ package model_test
 import (
 	"bytes"
 	"fmt"
+	"strconv"
 	"testing"
 	"time"
 
@@ -482,7 +483,7 @@ func TestGetSamplerParams(t *testing.T) {
 
 	for i, test := range tests {
 		tt := test
-		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
 			span := &model.Span{}
 			span.Tags = tt.tags
 			actualType, actualParam := span.GetSamplerParams(logger)

pkg/es/client/client.go

@@ -92,7 +92,7 @@ func (c *Client) request(esRequest elasticRequest) ([]byte, error) {
 
 func (c *Client) setAuthorization(r *http.Request) {
 	if c.BasicAuth != "" {
-		r.Header.Add("Authorization", fmt.Sprintf("Basic %s", c.BasicAuth))
+		r.Header.Add("Authorization", "Basic "+c.BasicAuth)
 	}
 }
 

pkg/es/client/ilm_client.go

@@ -20,7 +20,7 @@ type ILMClient struct {
 // Exists verify if a ILM policy exists
 func (i ILMClient) Exists(name string) (bool, error) {
 	_, err := i.request(elasticRequest{
-		endpoint: fmt.Sprintf("_ilm/policy/%s", name),
+		endpoint: "_ilm/policy/" + name,
 		method:   http.MethodGet,
 	})
 

pkg/es/client/index_client.go

@@ -57,7 +57,7 @@ func (i *IndicesClient) GetJaegerIndices(prefix string) ([]Index, error) {
 	prefix += "jaeger-*"
 
 	body, err := i.request(elasticRequest{
-		endpoint: fmt.Sprintf("%s?flat_settings=true&filter_path=*.aliases,*.settings", prefix),
+		endpoint: prefix + "?flat_settings=true&filter_path=*.aliases,*.settings",
 		method:   http.MethodGet,
 	})
 	if err != nil {
@@ -101,7 +101,7 @@ func (i *IndicesClient) indexDeleteRequest(concatIndices string) error {
 		var responseError ResponseError
 		if errors.As(err, &responseError) {
 			if responseError.StatusCode != http.StatusOK {
-				return responseError.prefixMessage(fmt.Sprintf("failed to delete indices: %s", concatIndices))
+				return responseError.prefixMessage("failed to delete indices: " + concatIndices)
 			}
 		}
 		return fmt.Errorf("failed to delete indices: %w", err)
@@ -146,7 +146,7 @@ func (i *IndicesClient) CreateIndex(index string) error {
 		var responseError ResponseError
 		if errors.As(err, &responseError) {
 			if responseError.StatusCode != http.StatusOK {
-				return responseError.prefixMessage(fmt.Sprintf("failed to create index: %s", index))
+				return responseError.prefixMessage("failed to create index: " + index)
 			}
 		}
 		return fmt.Errorf("failed to create index: %w", err)
@@ -161,7 +161,7 @@ func (i *IndicesClient) CreateAlias(aliases []Alias) error {
 		var responseError ResponseError
 		if errors.As(err, &responseError) {
 			if responseError.StatusCode != http.StatusOK {
-				return responseError.prefixMessage(fmt.Sprintf("failed to create aliases: %s", i.aliasesString(aliases)))
+				return responseError.prefixMessage("failed to create aliases: " + i.aliasesString(aliases))
 			}
 		}
 		return fmt.Errorf("failed to create aliases: %w", err)
@@ -176,7 +176,7 @@ func (i *IndicesClient) DeleteAlias(aliases []Alias) error {
 		var responseError ResponseError
 		if errors.As(err, &responseError) {
 			if responseError.StatusCode != http.StatusOK {
-				return responseError.prefixMessage(fmt.Sprintf("failed to delete aliases: %s", i.aliasesString(aliases)))
+				return responseError.prefixMessage("failed to delete aliases: " + i.aliasesString(aliases))
 			}
 		}
 		return fmt.Errorf("failed to delete aliases: %w", err)
@@ -247,7 +247,7 @@ func (i IndicesClient) CreateTemplate(template, name string) error {
 		var responseError ResponseError
 		if errors.As(err, &responseError) {
 			if responseError.StatusCode != http.StatusOK {
-				return responseError.prefixMessage(fmt.Sprintf("failed to create template: %s", name))
+				return responseError.prefixMessage("failed to create template: " + name)
 			}
 		}
 		return fmt.Errorf("failed to create template: %w", err)
@@ -258,7 +258,7 @@ func (i IndicesClient) CreateTemplate(template, name string) error {
 // Rollover create a rollover for certain index/alias
 func (i IndicesClient) Rollover(rolloverTarget string, conditions map[string]any) error {
 	esReq := elasticRequest{
-		endpoint: fmt.Sprintf("%s/_rollover/", rolloverTarget),
+		endpoint: rolloverTarget + "/_rollover/",
 		method:   http.MethodPost,
 	}
 	if len(conditions) > 0 {
@@ -276,7 +276,7 @@ func (i IndicesClient) Rollover(rolloverTarget string, conditions map[string]any
 		var responseError ResponseError
 		if errors.As(err, &responseError) {
 			if responseError.StatusCode != http.StatusOK {
-				return responseError.prefixMessage(fmt.Sprintf("failed to create rollover target: %s", rolloverTarget))
+				return responseError.prefixMessage("failed to create rollover target: " + rolloverTarget)
 			}
 		}
 		return fmt.Errorf("failed to create rollover: %w", err)

pkg/fswatcher/fswatcher.go

@@ -5,7 +5,7 @@ package fswatcher
 
 import (
 	"crypto/sha256"
-	"fmt"
+	"encoding/hex"
 	"io"
 	"os"
 	"path"
@@ -154,5 +154,5 @@ func hashFile(file string) (string, error) {
 		return "", err
 	}
 
-	return fmt.Sprintf("%x", h.Sum(nil)), nil
+	return hex.EncodeToString(h.Sum(nil)), nil
 }

pkg/testutils/logger_test.go

@@ -5,7 +5,7 @@
 package testutils
 
 import (
-	"fmt"
+	"strconv"
 	"sync"
 	"testing"
 
@@ -79,7 +79,7 @@ func TestLogMatcher(t *testing.T) {
 	}
 	for i, tt := range tests {
 		test := tt
-		t.Run(fmt.Sprintf("%v", i), func(t *testing.T) {
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
 			match, errMsg := LogMatcher(test.occurrences, test.subStr, test.logs)
 			assert.Equal(t, test.expected, match)
 			assert.Equal(t, test.errMsg, errMsg)

plugin/sampling/leaderelection/leader_election_test.go

@@ -5,8 +5,8 @@ package leaderelection
 
 import (
 	"errors"
-	"fmt"
 	"io"
+	"strconv"
 	"testing"
 	"time"
 
@@ -42,7 +42,7 @@ func TestAcquireLock(t *testing.T) {
 	}
 
 	for i, test := range tests {
-		t.Run(fmt.Sprintf("%v", i), func(t *testing.T) {
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
 			logger, logBuffer := testutils.NewLogger()
 			mockLock := &lmocks.Lock{}
 			mockLock.On("Acquire", "sampling_lock", followerInterval).Return(test.acquiredLock, test.err)

plugin/storage/badger/factory_test.go

@@ -5,7 +5,6 @@ package badger
 
 import (
 	"expvar"
-	"fmt"
 	"io"
 	"os"
 	"testing"
@@ -24,8 +23,8 @@ func TestInitializationErrors(t *testing.T) {
 	f := NewFactory()
 	v, command := config.Viperize(f.AddFlags)
 	dir := "/root/this_should_fail" // If this test fails, you have some issues in your system
-	keyParam := fmt.Sprintf("--badger.directory-key=%s", dir)
-	valueParam := fmt.Sprintf("--badger.directory-value=%s", dir)
+	keyParam := "--badger.directory-key=" + dir
+	valueParam := "--badger.directory-value=" + dir
 
 	command.ParseFlags([]string{
 		"--badger.ephemeral=false",

plugin/storage/badger/spanstore/read_write_test.go

@@ -376,8 +376,8 @@ func TestPersist(t *testing.T) {
 		cfg := badger.DefaultConfig()
 		v, command := config.Viperize(cfg.AddFlags)
 
-		keyParam := fmt.Sprintf("--badger.directory-key=%s", dir)
-		valueParam := fmt.Sprintf("--badger.directory-value=%s", dir)
+		keyParam := "--badger.directory-key=" + dir
+		valueParam := "--badger.directory-value=" + dir
 
 		command.ParseFlags([]string{
 			"--badger.ephemeral=false",
@@ -604,8 +604,8 @@ func runLargeFactoryTest(tb testing.TB, test func(tb testing.TB, sw spanstore.Wr
 	dir := filepath.Join(tb.TempDir(), "badger-testRun")
 	err := os.MkdirAll(dir, 0o700)
 	assertion.NoError(err)
-	keyParam := fmt.Sprintf("--badger.directory-key=%s", dir)
-	valueParam := fmt.Sprintf("--badger.directory-value=%s", dir)
+	keyParam := "--badger.directory-key=" + dir
+	valueParam := "--badger.directory-value=" + dir
 
 	command.ParseFlags([]string{
 		"--badger.ephemeral=false",