fix: remove deprecated ioutil (#528)

Signed-off-by: fengshunli <[email protected]>

Author: fengshunli

agent/main.go

@@ -6,7 +6,6 @@ import (
 	"encoding/base64"
 	"fmt"
 	"github.com/argoproj/gitops-engine/pkg/utils/text"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"os/exec"
@@ -78,7 +77,7 @@ func (s *settings) parseManifests() ([]*unstructured.Unstructured, string, error
 			if ext := strings.ToLower(filepath.Ext(info.Name())); ext != ".json" && ext != ".yml" && ext != ".yaml" {
 				return nil
 			}
-			data, err := ioutil.ReadFile(path)
+			data, err := os.ReadFile(path)
 			if err != nil {
 				return err
 			}

pkg/diff/diff_test.go

@@ -3,7 +3,7 @@ package diff
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"os/exec"
 	"path/filepath"
 	"strings"
@@ -43,7 +43,7 @@ func printDiff(result *DiffResult) (string, error) {
 
 // printDiffInternal prints a diff between two unstructured objects using an external diff utility and returns the output.
 func printDiffInternal(name string, live *unstructured.Unstructured, target *unstructured.Unstructured) ([]byte, error) {
-	tempDir, err := ioutil.TempDir("", "argocd-diff")
+	tempDir, err := os.MkdirTemp("", "argocd-diff")
 	if err != nil {
 		return nil, err
 	}
@@ -55,7 +55,7 @@ func printDiffInternal(name string, live *unstructured.Unstructured, target *uns
 			return nil, err
 		}
 	}
-	err = ioutil.WriteFile(targetFile, targetData, 0644)
+	err = os.WriteFile(targetFile, targetData, 0644)
 	if err != nil {
 		return nil, err
 	}
@@ -67,7 +67,7 @@ func printDiffInternal(name string, live *unstructured.Unstructured, target *uns
 			return nil, err
 		}
 	}
-	err = ioutil.WriteFile(liveFile, liveData, 0644)
+	err = os.WriteFile(liveFile, liveData, 0644)
 	if err != nil {
 		return nil, err
 	}
@@ -92,7 +92,7 @@ func mustToUnstructured(obj interface{}) *unstructured.Unstructured {
 }
 
 func unmarshalFile(path string) *unstructured.Unstructured {
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		panic(err)
 	}

pkg/health/health_test.go

@@ -5,7 +5,7 @@ Package provides functionality that allows assessing the health state of a Kuber
 package health
 
 import (
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -21,7 +21,7 @@ func assertAppHealth(t *testing.T, yamlPath string, expectedStatus HealthStatusC
 }
 
 func getHealthStatus(yamlPath string, t *testing.T) *HealthStatus {
-	yamlBytes, err := ioutil.ReadFile(yamlPath)
+	yamlBytes, err := os.ReadFile(yamlPath)
 	require.NoError(t, err)
 	var obj unstructured.Unstructured
 	err = yaml.Unmarshal(yamlBytes, &obj)

pkg/utils/kube/ctl.go

@@ -3,7 +3,7 @@ package kube
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strings"
 
 	"github.com/go-logr/logr"
@@ -284,7 +284,7 @@ func (k *KubectlCmd) DeleteResource(ctx context.Context, config *rest.Config, gv
 }
 
 func (k *KubectlCmd) ManageResources(config *rest.Config, openAPISchema openapi.Resources) (ResourceOperations, func(), error) {
-	f, err := ioutil.TempFile(utils.TempDir, "")
+	f, err := os.CreateTemp(utils.TempDir, "")
 	if err != nil {
 		return nil, nil, fmt.Errorf("failed to generate temp file for kubeconfig: %v", err)
 	}

pkg/utils/kube/resource_ops.go

@@ -6,7 +6,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"os"
 	"strings"
 
 	"github.com/go-logr/logr"
@@ -60,7 +60,7 @@ func (k *kubectlResourceOperations) runResourceCommand(ctx context.Context, obj
 	if err != nil {
 		return "", err
 	}
-	manifestFile, err := ioutil.TempFile(io.TempDir, "")
+	manifestFile, err := os.CreateTemp(io.TempDir, "")
 	if err != nil {
 		return "", fmt.Errorf("Failed to generate temp file for manifest: %v", err)
 	}

pkg/utils/testing/unstructured.go

@@ -2,15 +2,15 @@ package testing
 
 import (
 	"encoding/json"
-	"io/ioutil"
+	"os"
 	"strings"
 
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 	"sigs.k8s.io/yaml"
 )
 
 func UnstructuredFromFile(path string) *unstructured.Unstructured {
-	file, err := ioutil.ReadFile(path)
+	file, err := os.ReadFile(path)
 	if err != nil {
 		panic(err)
 	}