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, 12 insertions, 13 deletions

diff --git a/src/runtime/runtime-gdb_test.go b/src/runtime/runtime-gdb_test.go
index e52bd1c4c4..5df8c3c745 100644
--- a/src/runtime/runtime-gdb_test.go
+++ b/src/runtime/runtime-gdb_test.go
@@ -8,7 +8,6 @@ import (
 	"bytes"
 	"fmt"
 	"internal/testenv"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -170,7 +169,7 @@ func testGdbPython(t *testing.T, cgo bool) {
 	checkGdbVersion(t)
 	checkGdbPython(t)
 
-	dir, err := ioutil.TempDir("", "go-build")
+	dir, err := os.MkdirTemp("", "go-build")
 	if err != nil {
 		t.Fatalf("failed to create temp directory: %v", err)
 	}
@@ -195,7 +194,7 @@ func testGdbPython(t *testing.T, cgo bool) {
 		}
 	}
 
-	err = ioutil.WriteFile(filepath.Join(dir, "main.go"), src, 0644)
+	err = os.WriteFile(filepath.Join(dir, "main.go"), src, 0644)
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
@@ -404,7 +403,7 @@ func TestGdbBacktrace(t *testing.T) {
 	t.Parallel()
 	checkGdbVersion(t)
 
-	dir, err := ioutil.TempDir("", "go-build")
+	dir, err := os.MkdirTemp("", "go-build")
 	if err != nil {
 		t.Fatalf("failed to create temp directory: %v", err)
 	}
@@ -412,7 +411,7 @@ func TestGdbBacktrace(t *testing.T) {
 
 	// Build the source code.
 	src := filepath.Join(dir, "main.go")
-	err = ioutil.WriteFile(src, []byte(backtraceSource), 0644)
+	err = os.WriteFile(src, []byte(backtraceSource), 0644)
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
@@ -482,7 +481,7 @@ func TestGdbAutotmpTypes(t *testing.T) {
 		t.Skip("TestGdbAutotmpTypes is too slow on aix/ppc64")
 	}
 
-	dir, err := ioutil.TempDir("", "go-build")
+	dir, err := os.MkdirTemp("", "go-build")
 	if err != nil {
 		t.Fatalf("failed to create temp directory: %v", err)
 	}
@@ -490,7 +489,7 @@ func TestGdbAutotmpTypes(t *testing.T) {
 
 	// Build the source code.
 	src := filepath.Join(dir, "main.go")
-	err = ioutil.WriteFile(src, []byte(autotmpTypeSource), 0644)
+	err = os.WriteFile(src, []byte(autotmpTypeSource), 0644)
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
@@ -551,7 +550,7 @@ func TestGdbConst(t *testing.T) {
 	t.Parallel()
 	checkGdbVersion(t)
 
-	dir, err := ioutil.TempDir("", "go-build")
+	dir, err := os.MkdirTemp("", "go-build")
 	if err != nil {
 		t.Fatalf("failed to create temp directory: %v", err)
 	}
@@ -559,7 +558,7 @@ func TestGdbConst(t *testing.T) {
 
 	// Build the source code.
 	src := filepath.Join(dir, "main.go")
-	err = ioutil.WriteFile(src, []byte(constsSource), 0644)
+	err = os.WriteFile(src, []byte(constsSource), 0644)
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
@@ -618,7 +617,7 @@ func TestGdbPanic(t *testing.T) {
 	t.Parallel()
 	checkGdbVersion(t)
 
-	dir, err := ioutil.TempDir("", "go-build")
+	dir, err := os.MkdirTemp("", "go-build")
 	if err != nil {
 		t.Fatalf("failed to create temp directory: %v", err)
 	}
@@ -626,7 +625,7 @@ func TestGdbPanic(t *testing.T) {
 
 	// Build the source code.
 	src := filepath.Join(dir, "main.go")
-	err = ioutil.WriteFile(src, []byte(panicSource), 0644)
+	err = os.WriteFile(src, []byte(panicSource), 0644)
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}
@@ -696,7 +695,7 @@ func TestGdbInfCallstack(t *testing.T) {
 	t.Parallel()
 	checkGdbVersion(t)
 
-	dir, err := ioutil.TempDir("", "go-build")
+	dir, err := os.MkdirTemp("", "go-build")
 	if err != nil {
 		t.Fatalf("failed to create temp directory: %v", err)
 	}
@@ -704,7 +703,7 @@ func TestGdbInfCallstack(t *testing.T) {
 
 	// Build the source code.
 	src := filepath.Join(dir, "main.go")
-	err = ioutil.WriteFile(src, []byte(InfCallstackSource), 0644)
+	err = os.WriteFile(src, []byte(InfCallstackSource), 0644)
 	if err != nil {
 		t.Fatalf("failed to create file: %v", err)
 	}