fix: Remove references to deprecated io/ioutil pkg (#2867)

* Update benchmark_test

* Updae tar.go

* Update further refs

* Commit next set of replacements

* Reverting changes in vendor folder

* Update integreation_with_context_test.go

* Update k8s_test.go

* Update remaining usages

* Replace conflicting usage of fs local variable

integration/benchmark_test.go

@@ -19,7 +19,7 @@ package integration
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -94,7 +94,7 @@ func newResult(t *testing.T, f string) result {
 	if err != nil {
 		t.Errorf("could not read benchmark file %s", f)
 	}
-	byteValue, _ := ioutil.ReadAll(jsonFile)
+	byteValue, _ := io.ReadAll(jsonFile)
 	if err := json.Unmarshal(byteValue, &current); err != nil {
 		t.Errorf("could not unmarshal benchmark file")
 	}
@@ -160,7 +160,7 @@ func runInGcloud(dir string, num int) (string, error) {
 	}
 
 	// grab gcs and to temp dir and return
-	tmpDir, err := ioutil.TempDir("", fmt.Sprintf("%d", num))
+	tmpDir, err := os.MkdirTemp("", fmt.Sprintf("%d", num))
 	if err != nil {
 		return "", err
 	}

integration/images.go

@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path"
@@ -459,7 +458,7 @@ func buildKanikoImage(
 	shdUpload bool,
 ) (string, error) {
 	benchmarkEnv := "BENCHMARK_FILE=false"
-	benchmarkDir, err := ioutil.TempDir("", "")
+	benchmarkDir, err := os.MkdirTemp("", "")
 	if err != nil {
 		return "", err
 	}

integration/integration_with_context_test.go

@@ -18,7 +18,7 @@ package integration
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io/fs"
 	"os"
 	"path/filepath"
 	"testing"
@@ -31,12 +31,21 @@ func TestWithContext(t *testing.T) {
 	}
 
 	dir := filepath.Join(cwd, "dockerfiles-with-context")
-
-	testDirs, err := ioutil.ReadDir(dir)
+	entries, err := os.ReadDir(dir)
 	if err != nil {
 		t.Fatal(err)
 	}
 
+	testDirs := make([]fs.FileInfo, 0, len(entries))
+
+	for _, entry := range entries {
+		info, err := entry.Info()
+		if err != nil {
+			t.Fatal(err)
+		}
+		testDirs = append(testDirs, info)
+	}
+
 	builder := NewDockerFileBuilder()
 
 	for _, tdInfo := range testDirs {

integration/k8s_test.go

@@ -18,7 +18,7 @@ package integration
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io/fs"
 	"log"
 	"os"
 	"os/exec"
@@ -41,10 +41,19 @@ func TestK8s(t *testing.T) {
 
 	dir := filepath.Join(cwd, "dockerfiles-with-context")
 
-	testDirs, err := ioutil.ReadDir(dir)
+	entries, err := os.ReadDir(dir)
 	if err != nil {
 		t.Fatal(err)
 	}
+	testDirs := make([]fs.FileInfo, 0, len(entries))
+
+	for _, entry := range entries {
+		info, err := entry.Info()
+		if err != nil {
+			t.Fatal(err)
+		}
+		testDirs = append(testDirs, info)
+	}
 
 	builder := NewDockerFileBuilder()
 
@@ -64,7 +73,7 @@ func TestK8s(t *testing.T) {
 			dockerImage := GetDockerImage(config.imageRepo, name)
 			kanikoImage := GetKanikoImage(config.imageRepo, name)
 
-			tmpfile, err := ioutil.TempFile("", "k8s-job-*.yaml")
+			tmpfile, err := os.CreateTemp("", "k8s-job-*.yaml")
 			if err != nil {
 				log.Fatal(err)
 			}
@@ -77,7 +86,7 @@ func TestK8s(t *testing.T) {
 
 			t.Logf("Testing K8s based Kaniko building of dockerfile %s and push to %s \n",
 				testDir, kanikoImage)
-			content, err := ioutil.ReadFile(tmpfile.Name())
+			content, err := os.ReadFile(tmpfile.Name())
 			if err != nil {
 				log.Fatal(err)
 			}

integration/tar.go

@@ -19,7 +19,6 @@ package integration
 import (
 	"compress/gzip"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"time"
@@ -35,7 +34,7 @@ func CreateIntegrationTarball() (string, error) {
 	if err != nil {
 		return "nil", fmt.Errorf("Failed find path to integration dir: %w", err)
 	}
-	tempDir, err := ioutil.TempDir("", "")
+	tempDir, err := os.MkdirTemp("", "")
 	if err != nil {
 		return "", fmt.Errorf("Failed to create temporary directory to hold tarball: %w", err)
 	}