all: update to use os.ReadFile, os.WriteFile, os.CreateTemp, os.MkdirTemp

As part of #42026, these helpers from io/ioutil were moved to os.
(ioutil.TempFile and TempDir became os.CreateTemp and MkdirTemp.)

Update the Go tree to use the preferred names.

As usual, code compiled with the Go 1.4 bootstrap toolchain
and code vendored from other sources is excluded.

ReadDir changes are in a separate CL, because they are not a
simple search and replace.

For #42026.

Change-Id: If318df0216d57e95ea0c4093b89f65e5b0ababb3
Reviewed-on: https://go-review.googlesource.com/c/go/+/266365
Trust: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/src/image/jpeg/reader_test.go b/src/image/jpeg/reader_test.go
index 1e2798c945..bf07fadede 100644
--- a/src/image/jpeg/reader_test.go
+++ b/src/image/jpeg/reader_test.go
@@ -11,7 +11,6 @@ import (
 	"image"
 	"image/color"
 	"io"
-	"io/ioutil"
 	"math/rand"
 	"os"
 	"strings"
@@ -118,7 +117,7 @@ func (r *eofReader) Read(b []byte) (n int, err error) {
 
 func TestDecodeEOF(t *testing.T) {
 	// Check that if reader returns final data and EOF at same time, jpeg handles it.
-	data, err := ioutil.ReadFile("../testdata/video-001.jpeg")
+	data, err := os.ReadFile("../testdata/video-001.jpeg")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -189,7 +188,7 @@ func pixString(pix []byte, stride, x, y int) string {
 }
 
 func TestTruncatedSOSDataDoesntPanic(t *testing.T) {
-	b, err := ioutil.ReadFile("../testdata/video-005.gray.q50.jpeg")
+	b, err := os.ReadFile("../testdata/video-005.gray.q50.jpeg")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -493,7 +492,7 @@ func TestExtraneousData(t *testing.T) {
 }
 
 func benchmarkDecode(b *testing.B, filename string) {
-	data, err := ioutil.ReadFile(filename)
+	data, err := os.ReadFile(filename)
 	if err != nil {
 		b.Fatal(err)
 	}