chore: remove refs to deprecated io/ioutil

pkg/build/gobuild.go

@@ -22,7 +22,6 @@ import (
 	"fmt"
 	gb "go/build"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -288,7 +287,7 @@ func build(ctx context.Context, ip string, dir string, platform v1.Platform, con
 			return "", fmt.Errorf("creating KOCACHE bin dir: %w", err)
 		}
 	} else {
-		tmpDir, err = ioutil.TempDir("", "ko")
+		tmpDir, err = os.MkdirTemp("", "ko")
 		if err != nil {
 			return "", err
 		}
@@ -846,7 +845,7 @@ func (g *gobuild) buildOne(ctx context.Context, refStr string, base v1.Image, pl
 	}
 	dataLayerBytes := dataLayerBuf.Bytes()
 	dataLayer, err := tarball.LayerFromOpener(func() (io.ReadCloser, error) {
-		return ioutil.NopCloser(bytes.NewBuffer(dataLayerBytes)), nil
+		return io.NopCloser(bytes.NewBuffer(dataLayerBytes)), nil
 	}, tarball.WithCompressedCaching, tarball.WithMediaType(layerMediaType))
 	if err != nil {
 		return nil, err
@@ -957,7 +956,7 @@ func buildLayer(appPath, file string, platform *v1.Platform, layerMediaType type
 	}
 	binaryLayerBytes := binaryLayerBuf.Bytes()
 	return tarball.LayerFromOpener(func() (io.ReadCloser, error) {
-		return ioutil.NopCloser(bytes.NewBuffer(binaryLayerBytes)), nil
+		return io.NopCloser(bytes.NewBuffer(binaryLayerBytes)), nil
 	}, tarball.WithCompressedCaching, tarball.WithEstargzOptions(estargz.WithPrioritizedFiles([]string{
 		// When using estargz, prioritize downloading the binary entrypoint.
 		appPath,

pkg/build/gobuild_test.go

@@ -20,7 +20,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -403,12 +402,12 @@ func fauxSBOM(context.Context, string, string, string, oci.SignedEntity, string)
 
 // A helper method we use to substitute for the default "build" method.
 func writeTempFile(_ context.Context, s string, _ string, _ v1.Platform, _ Config) (string, error) {
-	tmpDir, err := ioutil.TempDir("", "ko")
+	tmpDir, err := os.MkdirTemp("", "ko")
 	if err != nil {
 		return "", err
 	}
 
-	file, err := ioutil.TempFile(tmpDir, "out")
+	file, err := os.CreateTemp(tmpDir, "out")
 	if err != nil {
 		return "", err
 	}
@@ -573,7 +572,7 @@ func validateImage(t *testing.T, img oci.SignedImage, baseLayers int64, creation
 				continue
 			}
 			found = true
-			body, err := ioutil.ReadAll(tr)
+			body, err := io.ReadAll(tr)
 			if err != nil {
 				t.Errorf("ReadAll() = %v", err)
 			} else if want, got := "Hello there\n", string(body); got != want {

pkg/commands/config.go

@@ -17,7 +17,7 @@ package commands
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"log"
 	"os"
 	"strconv"
@@ -41,7 +41,7 @@ import (
 )
 
 var (
-	amazonKeychain authn.Keychain = authn.NewKeychainFromHelper(ecr.NewECRHelper(ecr.WithLogger(ioutil.Discard)))
+	amazonKeychain authn.Keychain = authn.NewKeychainFromHelper(ecr.NewECRHelper(ecr.WithLogger(io.Discard)))
 	azureKeychain  authn.Keychain = authn.NewKeychainFromHelper(credhelper.NewACRCredentialsHelper())
 	keychain                      = authn.NewMultiKeychain(
 		amazonKeychain,

pkg/commands/resolver.go

@@ -20,7 +20,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path"
 	"strings"
@@ -423,9 +422,9 @@ func resolveFile(
 	}
 
 	if f == "-" {
-		b, err = ioutil.ReadAll(os.Stdin)
+		b, err = io.ReadAll(os.Stdin)
 	} else {
-		b, err = ioutil.ReadFile(f)
+		b, err = os.ReadFile(f)
 	}
 	if err != nil {
 		return nil, err

pkg/commands/resolver_test.go

@@ -20,9 +20,9 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"net/http/httptest"
+	"os"
 	"path"
 	"strings"
 	"testing"
@@ -317,7 +317,7 @@ func TestNewPublisherCanPublish(t *testing.T) {
 // The registry uses a NOP logger to avoid spamming test logs.
 // Remember to call `defer Close()` on the returned `httptest.Server`.
 func registryServerWithImage(namespace string) (*httptest.Server, error) {
-	nopLog := log.New(ioutil.Discard, "", 0)
+	nopLog := log.New(io.Discard, "", 0)
 	r := registry.New(registry.Logger(nopLog))
 	s := httptest.NewServer(r)
 	imageName := fmt.Sprintf("%s/%s", s.Listener.Addr().String(), namespace)
@@ -356,7 +356,7 @@ func mustRandom() v1.Image {
 func yamlToTmpFile(t *testing.T, yaml []byte) string {
 	t.Helper()
 
-	tmpfile, err := ioutil.TempFile("", "doc")
+	tmpfile, err := os.CreateTemp("", "doc")
 	if err != nil {
 		t.Fatalf("error creating temp file: %v", err)
 	}

pkg/internal/testing/daemon.go

@@ -17,7 +17,6 @@ package testing
 import (
 	"context"
 	"io"
-	"io/ioutil"
 	"strings"
 
 	"github.com/docker/docker/api/types"
@@ -32,7 +31,7 @@ type MockDaemon struct {
 func (m *MockDaemon) NegotiateAPIVersion(context.Context) {}
 func (m *MockDaemon) ImageLoad(context.Context, io.Reader, bool) (types.ImageLoadResponse, error) {
 	return types.ImageLoadResponse{
-		Body: ioutil.NopCloser(strings.NewReader("Loaded")),
+		Body: io.NopCloser(strings.NewReader("Loaded")),
 	}, nil
 }
 

pkg/publish/kind/write_test.go

@@ -19,7 +19,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"strings"
 	"testing"
 
@@ -203,7 +202,7 @@ type fakeCmd struct {
 func (f *fakeCmd) Run() error {
 	if f.stdin != nil {
 		// Consume the entire stdin to move the image publish forward.
-		ioutil.ReadAll(f.stdin)
+		io.ReadAll(f.stdin)
 	}
 	return f.err
 }

pkg/publish/layout_test.go

@@ -16,7 +16,6 @@ package publish
 
 import (
 	"context"
-	"io/ioutil"
 	"os"
 	"strings"
 	"testing"
@@ -31,7 +30,7 @@ func TestLayout(t *testing.T) {
 	}
 	importpath := "github.com/Google/go-containerregistry/cmd/crane"
 
-	tmp, err := ioutil.TempDir("/tmp", "ko")
+	tmp, err := os.MkdirTemp("/tmp", "ko")
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/publish/multi_test.go

@@ -17,7 +17,6 @@ package publish_test
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -34,7 +33,7 @@ func TestMulti(t *testing.T) {
 	repoName := fmt.Sprintf("%s/%s", "example.com", base)
 	importpath := "github.com/Google/go-containerregistry/cmd/crane"
 
-	fp, err := ioutil.TempFile("", "")
+	fp, err := os.CreateTemp("", "")
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -43,7 +42,7 @@ func TestMulti(t *testing.T) {
 
 	tp := publish.NewTarball(fp.Name(), repoName, md5Hash, []string{})
 
-	tmp, err := ioutil.TempDir("/tmp", "ko")
+	tmp, err := os.MkdirTemp("/tmp", "ko")
 	if err != nil {
 		t.Fatal(err)
 	}

pkg/publish/tarball_test.go

@@ -17,7 +17,6 @@ package publish_test
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"strings"
 	"testing"
@@ -35,7 +34,7 @@ func TestTarball(t *testing.T) {
 	base := "blah"
 	importpath := "github.com/Google/go-containerregistry/cmd/crane"
 
-	fp, err := ioutil.TempFile("", "")
+	fp, err := os.CreateTemp("", "")
 	if err != nil {
 		t.Fatal(err)
 	}

test/main.go

@@ -17,7 +17,6 @@ package main
 import (
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/signal"
@@ -63,7 +62,7 @@ func main() {
 
 	dp := os.Getenv("KO_DATA_PATH")
 	file := filepath.Join(dp, *f)
-	bytes, err := ioutil.ReadFile(file)
+	bytes, err := os.ReadFile(file)
 	if err != nil {
 		log.Fatalf("Error reading %q: %v", file, err)
 	}