chore: remove refs to deprecated io/ioutil (#577)

Signed-off-by: guoguangwu <guoguangwu@magic-shield.com>

cmd/imgpkg/imgpkg.go

@@ -4,7 +4,7 @@
 package main
 
 import (
-	"io/ioutil"
+	"io"
 	"log"
 	"os"
 
@@ -15,7 +15,7 @@ import (
 )
 
 func main() {
-	log.SetOutput(ioutil.Discard)
+	log.SetOutput(io.Discard)
 
 	// TODO logs
 	// TODO log flags used

pkg/imgpkg/bundle/bundle_images_lock.go

@@ -7,7 +7,6 @@ import (
 	"archive/tar"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"path/filepath"
 	"sync"
 
@@ -211,7 +210,7 @@ func (o *SingleLayerReader) Read(img regv1.Image) (lockconfig.ImagesLock, error)
 		}
 	}
 
-	bs, err := ioutil.ReadAll(tarReader)
+	bs, err := io.ReadAll(tarReader)
 	if err != nil {
 		return conf, fmt.Errorf("Reading images.yml from layer: %s", err)
 	}

pkg/imgpkg/bundle/image_locations_config.go

@@ -5,7 +5,7 @@ package bundle
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"sort"
 
 	"sigs.k8s.io/yaml"
@@ -29,7 +29,7 @@ type ImageLocation struct {
 }
 
 func NewLocationConfigFromPath(path string) (ImageLocationsConfig, error) {
-	bs, err := ioutil.ReadFile(path)
+	bs, err := os.ReadFile(path)
 	if err != nil {
 		return ImageLocationsConfig{}, fmt.Errorf("Reading path %s: %s", path, err)
 	}
@@ -79,7 +79,7 @@ func (c ImageLocationsConfig) WriteToPath(path string) error {
 	if err != nil {
 		return err
 	}
-	err = ioutil.WriteFile(path, bs, 0600)
+	err = os.WriteFile(path, bs, 0600)
 	if err != nil {
 		return fmt.Errorf("Writing image locations config: %s", err)
 	}

pkg/imgpkg/bundle/locations_configs.go

@@ -7,7 +7,6 @@ import (
 	"archive/tar"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -221,7 +220,7 @@ func (o *locationsSingleLayerReader) Read(img regv1.Image) (ImageLocationsConfig
 		}
 	}
 
-	bs, err := ioutil.ReadAll(tarReader)
+	bs, err := io.ReadAll(tarReader)
 	if err != nil {
 		return conf, fmt.Errorf("Reading image-locations.yml from layer: %s", err)
 	}

pkg/imgpkg/cmd/copy_repo_src_test.go

@@ -8,7 +8,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -448,10 +447,10 @@ images:
   annotations:
     my-annotation: image-index
 `, imageIndexRefDigest)
-		lockFile, err := ioutil.TempFile(assets.CreateTempFolder("images-lock-dir"), "images.lock.yml")
+		lockFile, err := os.CreateTemp(assets.CreateTempFolder("images-lock-dir"), "images.lock.yml")
 
 		require.NoError(t, err)
-		err = ioutil.WriteFile(lockFile.Name(), []byte(imageLockYAML), 0600)
+		err = os.WriteFile(lockFile.Name(), []byte(imageLockYAML), 0600)
 		require.NoError(t, err)
 
 		subject := subject
@@ -1076,10 +1075,10 @@ images:
   annotations:
     my-annotation: second-image
 `, image1.RefDigest, image2RefDigest)
-		lockFile, err := ioutil.TempFile(assets.CreateTempFolder("images-lock-dir"), "images.lock.yml")
+		lockFile, err := os.CreateTemp(assets.CreateTempFolder("images-lock-dir"), "images.lock.yml")
 
 		require.NoError(t, err)
-		err = ioutil.WriteFile(lockFile.Name(), []byte(imageLockYAML), 0600)
+		err = os.WriteFile(lockFile.Name(), []byte(imageLockYAML), 0600)
 		require.NoError(t, err)
 
 		subject := subject

pkg/imgpkg/cmd/push_test.go

@@ -5,7 +5,6 @@ package cmd
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -181,7 +180,7 @@ func TestDuplicateFilepathError(t *testing.T) {
 	}
 
 	someFile := filepath.Join(fooDir, "some-file.yml")
-	err = ioutil.WriteFile(someFile, []byte("foo: bar"), 0600)
+	err = os.WriteFile(someFile, []byte("foo: bar"), 0600)
 	if err != nil {
 		t.Fatalf("Failed to setup test: %s", err)
 	}
@@ -342,7 +341,7 @@ func createBundleDir(loc, imagesYaml string) error {
 	if imagesYaml == "" {
 		imagesYaml = emptyImagesYaml
 	}
-	return ioutil.WriteFile(filepath.Join(bundleDir, "images.yml"), []byte(imagesYaml), 0600)
+	return os.WriteFile(filepath.Join(bundleDir, "images.yml"), []byte(imagesYaml), 0600)
 }
 
 func createEmptyBundleDir(loc string) error {

pkg/imgpkg/image/tar_image.go

@@ -7,7 +7,6 @@ import (
 	"archive/tar"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -29,7 +28,7 @@ func NewTarImage(files []string, excludePaths []string, logger Logger, keepPermi
 
 // AsFileImage Creates an OCI Image representation of the provided folders
 func (i *TarImage) AsFileImage(labels map[string]string) (*FileImage, error) {
-	tmpFile, err := ioutil.TempFile("", "imgpkg-tar-image")
+	tmpFile, err := os.CreateTemp("", "imgpkg-tar-image")
 	if err != nil {
 		return nil, err
 	}

pkg/imgpkg/imagetar/tar_reader.go

@@ -6,7 +6,6 @@ package imagetar
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 
 	"github.com/google/go-containerregistry/pkg/name"
 	v1 "github.com/google/go-containerregistry/pkg/v1"
@@ -138,7 +137,7 @@ func (r TarReader) getIdsFromManifest(file tarFile) (*imagedesc.ImageRefDescript
 	}
 	defer manifestFile.Close()
 
-	manifestBytes, err := ioutil.ReadAll(manifestFile)
+	manifestBytes, err := io.ReadAll(manifestFile)
 	if err != nil {
 		return nil, err
 	}

pkg/imgpkg/imageutils/and/and_closer_test.go

@@ -21,7 +21,7 @@ package and
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"testing"
 )
 
@@ -38,7 +38,7 @@ func TestRead(t *testing.T) {
 		},
 	}
 
-	data, err := ioutil.ReadAll(rac)
+	data, err := io.ReadAll(rac)
 	if err != nil {
 		t.Errorf("ReadAll(rac) = %v", err)
 	}

pkg/imgpkg/imageutils/gzip/zip_test.go

@@ -22,21 +22,21 @@ package gzip
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"strings"
 	"testing"
 )
 
 func TestReader(t *testing.T) {
 	want := "This is the input string."
 	buf := bytes.NewBufferString(want)
-	zipped := ReadCloser(ioutil.NopCloser(buf))
+	zipped := ReadCloser(io.NopCloser(buf))
 	unzipped, err := UnzipReadCloser(zipped)
 	if err != nil {
 		t.Error("UnzipReadCloser() =", err)
 	}
 
-	b, err := ioutil.ReadAll(unzipped)
+	b, err := io.ReadAll(unzipped)
 	if err != nil {
 		t.Error("ReadAll() =", err)
 	}
@@ -86,17 +86,17 @@ func TestReadErrors(t *testing.T) {
 		t.Error("Is: expected errRead, got", err)
 	}
 
-	frc := ioutil.NopCloser(fr)
+	frc := io.NopCloser(fr)
 	if _, err := UnzipReadCloser(frc); err != errRead {
 		t.Error("UnzipReadCloser: expected errRead, got", err)
 	}
 
-	zr := ReadCloser(ioutil.NopCloser(fr))
+	zr := ReadCloser(io.NopCloser(fr))
 	if _, err := zr.Read(nil); err != errRead {
 		t.Error("ReadCloser: expected errRead, got", err)
 	}
 
-	zr = ReadCloserLevel(ioutil.NopCloser(strings.NewReader("zip me")), -10)
+	zr = ReadCloserLevel(io.NopCloser(strings.NewReader("zip me")), -10)
 	if _, err := zr.Read(nil); err == nil {
 		t.Error("Expected invalid level error, got:", err)
 	}

pkg/imgpkg/imageutils/verify/verify_test.go

@@ -23,7 +23,7 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"strings"
 	"testing"
 
@@ -43,11 +43,11 @@ func TestVerificationFailure(t *testing.T) {
 	want := "This is the input string."
 	buf := bytes.NewBufferString(want)
 
-	verified, err := ReadCloser(ioutil.NopCloser(buf), int64(len(want)), mustHash("not the same", t))
+	verified, err := ReadCloser(io.NopCloser(buf), int64(len(want)), mustHash("not the same", t))
 	if err != nil {
 		t.Fatal("ReadCloser() =", err)
 	}
-	if b, err := ioutil.ReadAll(verified); err == nil {
+	if b, err := io.ReadAll(verified); err == nil {
 		t.Errorf("ReadAll() = %q; want verification error", string(b))
 	}
 }
@@ -56,11 +56,11 @@ func TestVerification(t *testing.T) {
 	want := "This is the input string."
 	buf := bytes.NewBufferString(want)
 
-	verified, err := ReadCloser(ioutil.NopCloser(buf), int64(len(want)), mustHash(want, t))
+	verified, err := ReadCloser(io.NopCloser(buf), int64(len(want)), mustHash(want, t))
 	if err != nil {
 		t.Fatal("ReadCloser() =", err)
 	}
-	if _, err := ioutil.ReadAll(verified); err != nil {
+	if _, err := io.ReadAll(verified); err != nil {
 		t.Error("ReadAll() =", err)
 	}
 }
@@ -69,11 +69,11 @@ func TestVerificationSizeUnknown(t *testing.T) {
 	want := "This is the input string."
 	buf := bytes.NewBufferString(want)
 
-	verified, err := ReadCloser(ioutil.NopCloser(buf), SizeUnknown, mustHash(want, t))
+	verified, err := ReadCloser(io.NopCloser(buf), SizeUnknown, mustHash(want, t))
 	if err != nil {
 		t.Fatal("ReadCloser() =", err)
 	}
-	if _, err := ioutil.ReadAll(verified); err != nil {
+	if _, err := io.ReadAll(verified); err != nil {
 		t.Error("ReadAll() =", err)
 	}
 }
@@ -83,7 +83,7 @@ func TestBadHash(t *testing.T) {
 		Algorithm: "fake256",
 		Hex:       "whatever",
 	}
-	_, err := ReadCloser(ioutil.NopCloser(strings.NewReader("hi")), 0, h)
+	_, err := ReadCloser(io.NopCloser(strings.NewReader("hi")), 0, h)
 	if err == nil {
 		t.Errorf("ReadCloser() = %v, wanted err", err)
 	}
@@ -96,11 +96,11 @@ func TestBadSize(t *testing.T) {
 	for _, size := range []int64{3, 100} {
 		t.Run(fmt.Sprintf("expecting size %d", size), func(t *testing.T) {
 			buf := bytes.NewBufferString(want)
-			rc, err := ReadCloser(ioutil.NopCloser(buf), size, mustHash(want, t))
+			rc, err := ReadCloser(io.NopCloser(buf), size, mustHash(want, t))
 			if err != nil {
 				t.Fatal("ReadCloser() =", err)
 			}
-			if b, err := ioutil.ReadAll(rc); err == nil {
+			if b, err := io.ReadAll(rc); err == nil {
 				t.Errorf("ReadAll() = %q; want verification error", string(b))
 			}
 		})

pkg/imgpkg/lockconfig/bundle_lock.go

@@ -5,7 +5,7 @@ package lockconfig
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 
 	regname "github.com/google/go-containerregistry/pkg/name"
 	"sigs.k8s.io/yaml"
@@ -27,7 +27,7 @@ type BundleRef struct {
 }
 
 func NewBundleLockFromPath(path string) (BundleLock, error) {
-	bs, err := ioutil.ReadFile(path)
+	bs, err := os.ReadFile(path)
 	if err != nil {
 		return BundleLock{}, fmt.Errorf("Reading path %s: %s", path, err)
 	}
@@ -84,7 +84,7 @@ func (b BundleLock) WriteToPath(path string) error {
 		return err
 	}
 
-	err = ioutil.WriteFile(path, bs, 0600)
+	err = os.WriteFile(path, bs, 0600)
 	if err != nil {
 		return fmt.Errorf("Writing bundle config: %s", err)
 	}

pkg/imgpkg/lockconfig/images_lock.go

@@ -5,7 +5,7 @@ package lockconfig
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 
 	regname "github.com/google/go-containerregistry/pkg/name"
 	"sigs.k8s.io/yaml"
@@ -37,7 +37,7 @@ func NewEmptyImagesLock() ImagesLock {
 }
 
 func NewImagesLockFromPath(path string) (ImagesLock, error) {
-	bs, err := ioutil.ReadFile(path)
+	bs, err := os.ReadFile(path)
 	if err != nil {
 		return ImagesLock{}, fmt.Errorf("Reading path %s: %s", path, err)
 	}
@@ -125,7 +125,7 @@ func (i ImagesLock) WriteToPath(path string) error {
 		return err
 	}
 
-	err = ioutil.WriteFile(path, bs, 0600)
+	err = os.WriteFile(path, bs, 0600)
 	if err != nil {
 		return fmt.Errorf("Writing images config: %s", err)
 	}

pkg/imgpkg/registry/registry.go

@@ -7,8 +7,8 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"fmt"
-	"io/ioutil"
 	"net/http"
+	"os"
 	"regexp"
 	"sync"
 	"time"
@@ -536,7 +536,7 @@ func newHTTPTransport(opts Opts) (*http.Transport, error) {
 
 	if len(opts.CACertPaths) > 0 {
 		for _, path := range opts.CACertPaths {
-			if certs, err := ioutil.ReadFile(path); err != nil {
+			if certs, err := os.ReadFile(path); err != nil {
 				return nil, fmt.Errorf("Reading CA certificates from '%s': %s", path, err)
 			} else if ok := pool.AppendCertsFromPEM(certs); !ok {
 				return nil, fmt.Errorf("Adding CA certificates from '%s': failed", path)