cleanup: remove ioutil

Signed-off-by: xin.li <[email protected]>

config_dbtester.go

@@ -16,7 +16,7 @@ package dbtester
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -57,7 +57,7 @@ type Config struct {
 
 // ReadConfig reads control configuration file.
 func ReadConfig(fpath string, analyze bool) (*Config, error) {
-	bts, err := ioutil.ReadFile(fpath)
+	bts, err := os.ReadFile(fpath)
 	if err != nil {
 		return nil, err
 	}
@@ -279,7 +279,7 @@ func ReadConfig(fpath string, analyze bool) (*Config, error) {
 	}
 
 	if cfg.ConfigClientMachineInitial.GoogleCloudStorageKeyPath != "" && !analyze {
-		bts, err = ioutil.ReadFile(cfg.ConfigClientMachineInitial.GoogleCloudStorageKeyPath)
+		bts, err = os.ReadFile(cfg.ConfigClientMachineInitial.GoogleCloudStorageKeyPath)
 		if err != nil {
 			return nil, err
 		}

pkg/fileinspect/fileinspect_test.go

@@ -17,7 +17,6 @@ package fileinspect
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -45,7 +44,7 @@ func writeData(fpath string, data []byte) (n int, err error) {
 }
 
 func createData() (dir string, n int64, err error) {
-	dir, err = ioutil.TempDir(os.TempDir(), "fileinspect-write-test")
+	dir, err = os.MkdirTemp(os.TempDir(), "fileinspect-write-test")
 	if err != nil {
 		return
 	}

pkg/remotestorage/example/main.go

@@ -15,16 +15,16 @@
 package main
 
 import (
-	"io/ioutil"
 	"log"
+	"os"
 
 	"github.com/etcd-io/dbtester/pkg/remotestorage"
 
 	"go.uber.org/zap"
 )
 
 func main() {
-	kbs, err := ioutil.ReadFile("key.json")
+	kbs, err := os.ReadFile("key.json")
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -37,7 +37,7 @@ func main() {
 	}
 
 	// upload directories
-	// kbs, err := ioutil.ReadFile("key.json")
+	// kbs, err := os.ReadFile("key.json")
 	// if err != nil {
 	// 	log.Fatal(err)
 	// }

pkg/remotestorage/uploader.go

@@ -17,7 +17,7 @@ package remotestorage
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strings"
 
@@ -91,9 +91,9 @@ func (g *GoogleCloudStorage) UploadFile(bucket, src, dst string, opts ...OpOptio
 	}
 
 	g.lg.Info("uploading", zap.String("source", src), zap.String("destination", dst))
-	bts, err := ioutil.ReadFile(src)
+	bts, err := os.ReadFile(src)
 	if err != nil {
-		return fmt.Errorf("ioutil.ReadFile(%s) %v", src, err)
+		return fmt.Errorf("os.ReadFile(%s) %v", src, err)
 	}
 	if _, err := wc.Write(bts); err != nil {
 		return err
@@ -144,9 +144,9 @@ func (g *GoogleCloudStorage) UploadDir(bucket, src, dst string, opts ...OpOption
 			if ret.ContentType != "" {
 				wc.ContentType = ret.ContentType
 			}
-			bts, err := ioutil.ReadFile(fpath)
+			bts, err := os.ReadFile(fpath)
 			if err != nil {
-				errc <- fmt.Errorf("ioutil.ReadFile(%s) %v", fpath, err)
+				errc <- fmt.Errorf("os.ReadFile(%s) %v", fpath, err)
 				return
 			}
 			if _, err := wc.Write(bts); err != nil {

util.go

@@ -17,7 +17,6 @@ package dbtester
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	mrand "math/rand"
 	"net/http"
 	"os"
@@ -90,7 +89,7 @@ func exist(fpath string) bool {
 // and closes it. This prevents TCP/TLS connections from closing,
 // therefore available for reuse.
 func gracefulClose(resp *http.Response) {
-	io.Copy(ioutil.Discard, resp.Body)
+	io.Copy(io.Discard, resp.Body)
 	resp.Body.Close()
 }