refactor: stop using deprecated io/ioutil

node/config/cfgdocgen/gen.go

@@ -2,14 +2,13 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"sort"
 	"strings"
 )
 
 func run() error {
-	tfb, err := ioutil.ReadFile("./node/config/types.go")
+	tfb, err := os.ReadFile("./node/config/types.go")
 	if err != nil {
 		return err
 	}

node/config/load.go

@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"reflect"
 	"regexp"
@@ -47,7 +46,7 @@ func FromFile(path string, opts ...LoadCfgOpt) (interface{}, error) {
 		return nil, err
 	}
 	defer file.Close() //nolint:errcheck,staticcheck // The file is RO
-	cfgBs, err := ioutil.ReadAll(file)
+	cfgBs, err := io.ReadAll(file)
 	if err != nil {
 		return nil, xerrors.Errorf("failed to read config for validation checks %w", err)
 	}

node/config/load_test.go

@@ -3,7 +3,6 @@ package config
 
 import (
 	"bytes"
-	"io/ioutil"
 	"os"
 	"testing"
 	"time"
@@ -50,7 +49,7 @@ func TestParitalConfig(t *testing.T) {
 	}
 
 	{
-		f, err := ioutil.TempFile("", "config-*.toml")
+		f, err := os.CreateTemp("", "config-*.toml")
 		fname := f.Name()
 
 		assert.NoError(err, "tmp file shold not error")
@@ -115,7 +114,7 @@ func TestValidateConfigSetsEnableSplitstore(t *testing.T) {
 	assert.False(t, MatchEnableSplitstoreField(string(cfgCommentedOutEnableSS)))
 
 	// write config with commented out EnableSplitstore to file
-	f, err := ioutil.TempFile("", "config.toml")
+	f, err := os.CreateTemp("", "config.toml")
 	fname := f.Name()
 	assert.NoError(t, err)
 	defer func() {
@@ -132,7 +131,7 @@ func TestValidateConfigSetsEnableSplitstore(t *testing.T) {
 
 // Loading without a config file and a default fails if the default fallback is disabled
 func TestFailToFallbackToDefault(t *testing.T) {
-	dir, err := ioutil.TempDir("", "dirWithNoFiles")
+	dir, err := os.MkdirTemp("", "dirWithNoFiles")
 	assert.NoError(t, err)
 	defer assert.NoError(t, os.RemoveAll(dir))
 	nonExistantFileName := dir + "/notarealfile"

node/config/storage.go

@@ -3,7 +3,6 @@ package config
 import (
 	"encoding/json"
 	"io"
-	"io/ioutil"
 	"os"
 
 	"golang.org/x/xerrors"
@@ -43,7 +42,7 @@ func WriteStorageFile(path string, config storiface.StorageConfig) error {
 		return xerrors.Errorf("marshaling storage config: %w", err)
 	}
 
-	if err := ioutil.WriteFile(path, b, 0644); err != nil {
+	if err := os.WriteFile(path, b, 0644); err != nil {
 		return xerrors.Errorf("persisting storage config (%s): %w", path, err)
 	}