Update golang syntax to pass linter

Syntax was deprecated by golang

Signed-off-by: Dave Riddle <driddle@vmware.com>

cmd/sonobuoy/app/gen.go

@@ -20,7 +20,6 @@ package app
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"time"
 
@@ -213,7 +212,7 @@ func NewCmdGen() *cobra.Command {
 func genManifest(genflags *genFlags) func(cmd *cobra.Command, args []string) {
 	return func(cmd *cobra.Command, args []string) {
 		if len(genflags.genFile) > 0 {
-			b, err := ioutil.ReadFile(genflags.genFile)
+			b, err := os.ReadFile(genflags.genFile)
 			if err != nil {
 				errlog.LogError(err)
 				os.Exit(1)

cmd/sonobuoy/app/gen_plugin_def_test.go

@@ -18,7 +18,7 @@ package app
 import (
 	"bytes"
 	"flag"
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"github.com/vmware-tanzu/sonobuoy/pkg/plugin/manifest"
@@ -143,9 +143,9 @@ func TestPluginGenDef(t *testing.T) {
 			}
 
 			if *update {
-				ioutil.WriteFile(tC.expectFile, []byte(manifest), 0666)
+				os.WriteFile(tC.expectFile, []byte(manifest), 0666)
 			} else {
-				fileData, err := ioutil.ReadFile(tC.expectFile)
+				fileData, err := os.ReadFile(tC.expectFile)
 				if err != nil {
 					t.Fatalf("Failed to read golden file %v: %v", tC.expectFile, err)
 				}

cmd/sonobuoy/app/images_test.go

@@ -16,7 +16,6 @@ limitations under the License.
 package app
 
 import (
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -35,7 +34,7 @@ sigStorageRegistry: test-fake-registry.corp/fake-user
 `
 
 func sampleE2eRegistryConfig() (string, error) {
-	configFile, err := ioutil.TempFile("", "e2eRegistryConfig.yaml")
+	configFile, err := os.CreateTemp("", "e2eRegistryConfig.yaml")
 	if err != nil {
 		return "", err
 	}

cmd/sonobuoy/app/pluginList.go

@@ -19,7 +19,6 @@ package app
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
@@ -169,7 +168,7 @@ func (p *pluginList) loadPluginsFromFilesystem(str, renameAs string) error {
 // into the directory. A plugin must have the '.yaml' extension to be considered.
 // It returns the first error encountered and stops processing.
 func (p *pluginList) loadPluginsDir(dirpath string) error {
-	files, err := ioutil.ReadDir(dirpath)
+	files, err := os.ReadDir(dirpath)
 	if err != nil {
 		return errors.Wrapf(err, "failed to read directory %q", dirpath)
 	}
@@ -213,7 +212,7 @@ func (p *pluginList) loadSinglePluginFromFile(filepath, renameAs string) error {
 // loadSinglePlugin reads the data from the reader and loads the plugin.
 func (p *pluginList) loadSinglePlugin(r io.ReadCloser, renameAs string) error {
 	defer r.Close()
-	b, err := ioutil.ReadAll(r)
+	b, err := io.ReadAll(r)
 	if err != nil {
 		return errors.Wrap(err, "failed to read data for plugin")
 	}

cmd/sonobuoy/app/pluginList_test.go

@@ -17,9 +17,9 @@ package app
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
+	"os"
 	"testing"
 
 	"github.com/vmware-tanzu/sonobuoy/pkg/plugin/manifest"
@@ -30,7 +30,7 @@ import (
 func TestSetPluginList(t *testing.T) {
 	serveFile := func(filepath string) http.Handler {
 		return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-			b, err := ioutil.ReadFile(filepath)
+			b, err := os.ReadFile(filepath)
 			if err != nil {
 				t.Fatal(err)
 			}

cmd/sonobuoy/app/sonobuoyconfig.go

@@ -18,7 +18,7 @@ package app
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"os"
 	"reflect"
 
 	"github.com/pkg/errors"
@@ -48,7 +48,7 @@ func (c *SonobuoyConfig) Set(str string) error {
 		return errors.New("if a custom config file is set, it must be set before other flags that modify configuration fields")
 	}
 
-	bytes, err := ioutil.ReadFile(str)
+	bytes, err := os.ReadFile(str)
 	if err != nil {
 		return errors.Wrap(err, "couldn't open config file")
 	}

cmd/sonobuoy/app/splat.go

@@ -19,7 +19,7 @@ package app
 import (
 	"archive/tar"
 	"compress/gzip"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 
@@ -96,7 +96,7 @@ func addFileToTarball(tarWriter *tar.Writer, filename string) error {
 		return err
 	}
 
-	fileContent, err := ioutil.ReadAll(file)
+	fileContent, err := io.ReadAll(file)
 	if err != nil {
 		return err
 	}

cmd/sonobuoy/app/status_test.go

@@ -19,7 +19,7 @@ package app
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"github.com/vmware-tanzu/sonobuoy/pkg/plugin"
@@ -89,9 +89,9 @@ func TestPrintStatus(t *testing.T) {
 			}
 
 			if *update {
-				ioutil.WriteFile(tc.expectFile, b.Bytes(), 0666)
+				os.WriteFile(tc.expectFile, b.Bytes(), 0666)
 			} else {
-				fileData, err := ioutil.ReadFile(tc.expectFile)
+				fileData, err := os.ReadFile(tc.expectFile)
 				if err != nil {
 					t.Fatalf("Failed to read golden file %v: %v", tc.expectFile, err)
 				}

pkg/backplane/ca/ca_test.go

@@ -18,7 +18,7 @@ package ca
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"math/big"
 	"net/http"
 	"net/http/httptest"
@@ -131,7 +131,7 @@ func TestServer(t *testing.T) {
 		t.Fatalf("expected client error to be null, got %v", err)
 	}
 	defer resp.Body.Close()
-	respBody, err := ioutil.ReadAll(resp.Body)
+	respBody, err := io.ReadAll(resp.Body)
 	if err != nil {
 		t.Fatalf("couldn't read body: %v", err)
 	}

pkg/client/gen.go

@@ -24,7 +24,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
+	"os"
 	"sort"
 	"strings"
 
@@ -314,7 +314,7 @@ func generateSecret(w io.Writer, cfg *GenConfig) error {
 		return nil
 	}
 
-	sshKeyData, err := ioutil.ReadFile(cfg.SSHKeyPath)
+	sshKeyData, err := os.ReadFile(cfg.SSHKeyPath)
 	if err != nil {
 		return errors.Wrapf(err, "unable to read SSH key file: %v", cfg.SSHKeyPath)
 	}

pkg/client/gen_test.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"flag"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"reflect"
 	"strings"
@@ -499,9 +499,9 @@ func TestGenerateManifestGolden(t *testing.T) {
 			}
 
 			if *update {
-				ioutil.WriteFile(tc.goldenFile, manifest, 0666)
+				os.WriteFile(tc.goldenFile, manifest, 0666)
 			} else {
-				fileData, err := ioutil.ReadFile(tc.goldenFile)
+				fileData, err := os.ReadFile(tc.goldenFile)
 				if err != nil {
 					t.Fatalf("Failed to read golden file %v: %v", tc.goldenFile, err)
 				}

pkg/client/preflight_test.go

@@ -19,7 +19,7 @@ package client
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"strings"
 	"testing"
 
@@ -36,7 +36,7 @@ import (
 func TestVersionCheck(t *testing.T) {
 	testHook := &testhook.Hook{}
 	logrus.AddHook(testHook)
-	logrus.SetOutput(ioutil.Discard)
+	logrus.SetOutput(io.Discard)
 
 	serverAtVersion := func(major, minor, git string) *fakeServerVersionInterface {
 		return &fakeServerVersionInterface{

pkg/client/results/junit_test.go

@@ -7,7 +7,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -39,7 +38,7 @@ func TestJUnitProcessReader(t *testing.T) {
 	}
 	itemFromFile := func(t *testing.T, path string) Item {
 		i := Item{}
-		b, err := ioutil.ReadFile(path)
+		b, err := os.ReadFile(path)
 		if err != nil {
 			t.Fatalf("Failed to read test file %v: %v", path, err)
 		}
@@ -95,7 +94,7 @@ func TestJUnitProcessReader(t *testing.T) {
 					t.Fatalf("Failed to marshal expected Item for debug: %v", err)
 				}
 				t.Logf("Updating goldenfile %v", tc.expectItemFromFile)
-				ioutil.WriteFile(tc.expectItemFromFile, b, 0666)
+				os.WriteFile(tc.expectItemFromFile, b, 0666)
 				return
 			}
 

pkg/client/results/processing.go

@@ -19,7 +19,6 @@ package results
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path"
 	"path/filepath"
@@ -213,7 +212,7 @@ func PostProcessPlugin(p plugin.Interface, dir string) (Item, []error) {
 func processNodesWithProcessor(p plugin.Interface, baseDir, dir string, processor postProcessor, selector fileSelector) ([]Item, error) {
 	pdir := path.Join(baseDir, PluginsDir, p.GetName())
 
-	nodeDirs, err := ioutil.ReadDir(dir)
+	nodeDirs, err := os.ReadDir(dir)
 	if err != nil && !os.IsNotExist(err) {
 		return []Item{}, err
 	}

pkg/client/results/processing_test.go

@@ -19,7 +19,7 @@ package results
 import (
 	"encoding/json"
 	"flag"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"testing"
 
@@ -218,11 +218,11 @@ func TestPostProcessPluginGolden(t *testing.T) {
 				if err != nil {
 					t.Fatalf("Failed to marshal item: %v", err)
 				}
-				ioutil.WriteFile(expectResults(tc.key), itemBytes, 0666)
+				os.WriteFile(expectResults(tc.key), itemBytes, 0666)
 			} else {
 				// Read in golden file and unmarshal. Easier to debug differences in the items than
 				// comparing the bytes directly.
-				fileData, err := ioutil.ReadFile(expectResults(tc.key))
+				fileData, err := os.ReadFile(expectResults(tc.key))
 				if err != nil {
 					t.Fatalf("Failed to read golden file %v: %v", expectResults(tc.key), err)
 				}

pkg/client/results/reader_test.go

@@ -21,7 +21,6 @@ import (
 	"compress/gzip"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -47,7 +46,7 @@ func (v *version) String() string {
 
 func MustGetReader(path string, t *testing.T) *results.Reader {
 	t.Helper()
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		t.Fatalf("Failed to read tarball data: %v", err)
 	}
@@ -345,7 +344,7 @@ func TestExtractBytes(t *testing.T) {
 
 func ExampleNewReaderFromBytes() {
 	path := "testdata/results-0.8.tar.gz"
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		panic(err)
 	}

pkg/client/retrieve.go

@@ -21,7 +21,6 @@ import (
 	"compress/gzip"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -277,7 +276,7 @@ func tarCmd(path string) []string {
 }
 
 func drainReader(r io.Reader) error {
-	b, err := ioutil.ReadAll(r)
+	b, err := io.ReadAll(r)
 	if err != nil {
 		return errors.Wrap(err, "failed to drain the tar reader")
 	}

pkg/client/run.go

@@ -20,7 +20,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 	"text/tabwriter"
@@ -228,9 +227,9 @@ func loadManifestFromFile(f string) ([]byte, error) {
 			return nil, fmt.Errorf("nothing on stdin to read")
 		}
 
-		return ioutil.ReadAll(os.Stdin)
+		return io.ReadAll(os.Stdin)
 	} else {
-		return ioutil.ReadFile(f)
+		return os.ReadFile(f)
 	}
 }
 

pkg/config/loader.go

@@ -19,7 +19,7 @@ package config
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"strings"
 
@@ -56,7 +56,7 @@ func LoadConfig(pathsToTry ...string) (*Config, error) {
 	defer jsonFile.Close()
 	logrus.Tracef("Loading config from file: %v", fpath)
 
-	b, err := ioutil.ReadAll(jsonFile)
+	b, err := io.ReadAll(jsonFile)
 	if err != nil {
 		return nil, errors.Wrapf(err, "read config file %q", fpath)
 	}