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, 9 insertions, 10 deletions

diff --git a/src/path/filepath/path_windows_test.go b/src/path/filepath/path_windows_test.go
index 9309a7dc4d..1c3d84c62d 100644
--- a/src/path/filepath/path_windows_test.go
+++ b/src/path/filepath/path_windows_test.go
@@ -9,7 +9,6 @@ import (
 	"fmt"
 	"internal/testenv"
 	"io/fs"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -38,7 +37,7 @@ func testWinSplitListTestIsValid(t *testing.T, ti int, tt SplitListTest,
 		perm    fs.FileMode = 0700
 	)
 
-	tmp, err := ioutil.TempDir("", "testWinSplitListTestIsValid")
+	tmp, err := os.MkdirTemp("", "testWinSplitListTestIsValid")
 	if err != nil {
 		t.Fatalf("TempDir failed: %v", err)
 	}
@@ -63,7 +62,7 @@ func testWinSplitListTestIsValid(t *testing.T, ti int, tt SplitListTest,
 			return
 		}
 		fn, data := filepath.Join(dd, cmdfile), []byte("@echo "+d+"\r\n")
-		if err = ioutil.WriteFile(fn, data, perm); err != nil {
+		if err = os.WriteFile(fn, data, perm); err != nil {
 			t.Errorf("%d,%d: WriteFile(%#q) failed: %v", ti, i, fn, err)
 			return
 		}
@@ -104,7 +103,7 @@ func testWinSplitListTestIsValid(t *testing.T, ti int, tt SplitListTest,
 func TestWindowsEvalSymlinks(t *testing.T) {
 	testenv.MustHaveSymlink(t)
 
-	tmpDir, err := ioutil.TempDir("", "TestWindowsEvalSymlinks")
+	tmpDir, err := os.MkdirTemp("", "TestWindowsEvalSymlinks")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -162,13 +161,13 @@ func TestWindowsEvalSymlinks(t *testing.T) {
 // TestEvalSymlinksCanonicalNames verify that EvalSymlinks
 // returns "canonical" path names on windows.
 func TestEvalSymlinksCanonicalNames(t *testing.T) {
-	tmp, err := ioutil.TempDir("", "evalsymlinkcanonical")
+	tmp, err := os.MkdirTemp("", "evalsymlinkcanonical")
 	if err != nil {
 		t.Fatal("creating temp dir:", err)
 	}
 	defer os.RemoveAll(tmp)
 
-	// ioutil.TempDir might return "non-canonical" name.
+	// os.MkdirTemp might return "non-canonical" name.
 	cTmpName, err := filepath.EvalSymlinks(tmp)
 	if err != nil {
 		t.Errorf("EvalSymlinks(%q) error: %v", tmp, err)
@@ -418,7 +417,7 @@ func TestToNorm(t *testing.T) {
 		{".", `\\localhost\c$`, `\\localhost\c$`},
 	}
 
-	tmp, err := ioutil.TempDir("", "testToNorm")
+	tmp, err := os.MkdirTemp("", "testToNorm")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -429,7 +428,7 @@ func TestToNorm(t *testing.T) {
 		}
 	}()
 
-	// ioutil.TempDir might return "non-canonical" name.
+	// os.MkdirTemp might return "non-canonical" name.
 	ctmp, err := filepath.EvalSymlinks(tmp)
 	if err != nil {
 		t.Fatal(err)
@@ -527,7 +526,7 @@ func TestNTNamespaceSymlink(t *testing.T) {
 		t.Skip("skipping test because mklink command does not support junctions")
 	}
 
-	tmpdir, err := ioutil.TempDir("", "TestNTNamespaceSymlink")
+	tmpdir, err := os.MkdirTemp("", "TestNTNamespaceSymlink")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -564,7 +563,7 @@ func TestNTNamespaceSymlink(t *testing.T) {
 	testenv.MustHaveSymlink(t)
 
 	file := filepath.Join(tmpdir, "file")
-	err = ioutil.WriteFile(file, []byte(""), 0666)
+	err = os.WriteFile(file, []byte(""), 0666)
 	if err != nil {
 		t.Fatal(err)
 	}