minor cache clean up and small lint changes

Author: vijeyash1

agent/kubviz/kubePreUpgrade.go

@@ -57,7 +57,6 @@ var result *model.Result
 func publishK8sDepricated_Deleted_Api(result *model.Result, js nats.JetStreamContext) error {
 	for _, deprecatedAPI := range result.DeprecatedAPIs {
 		deprecatedAPI.ClusterName = ClusterName
-		fmt.Println("deprecatedAPI", deprecatedAPI)
 		deprecatedAPIJson, _ := json.Marshal(deprecatedAPI)
 		_, err := js.Publish(constants.EventSubject_depricated, deprecatedAPIJson)
 		if err != nil {
@@ -90,7 +89,7 @@ func KubePreUpgradeDetector(config *rest.Config, js nats.JetStreamContext) error
 	if err != nil {
 		return err
 	}
-	defer os.RemoveAll(filename)
+	defer os.RemoveAll(swaggerdir)
 	swaggerfile := filename
 	kubernetesAPIs, err := PopulateKubeAPIMap(swaggerfile)
 	if err != nil {
@@ -178,23 +177,32 @@ func getKubeAPIValues(value map[string]interface{}) (model.KubeAPI, bool) {
 	return model.KubeAPI{}, false
 }
 func downloadFile(filename, url string) error {
-	log.Debugf("Downloading file from %s", url)
 	resp, err := http.Get(url)
 	if err != nil {
 		log.Error(err)
+		return err
 	}
 	if resp.StatusCode > 305 {
 		log.Errorf("could not download the swagger file %s", url)
+		return fmt.Errorf("failed to download file, status code: %d", resp.StatusCode)
 	}
+	contentLength := resp.ContentLength
+	log.Infof("The size of the file to be downloaded for kubepreupgrade plugin is %d bytes", contentLength)
+
 	defer resp.Body.Close()
 	out, err := os.Create(filename)
 	if err != nil {
 		log.Error(err)
 	}
 	defer out.Close()
-	_, err = io.Copy(out, resp.Body)
+	bytesCopied, err := io.Copy(out, resp.Body)
+	if err != nil {
+		log.WithError(err).Error("Failed to copy the file contents")
+		return err
+	}
+	log.Infof("Downloaded %d bytes for file %s", bytesCopied, filename)
 
-	return err
+	return nil
 }
 
 func getGroupVersionKind(value map[string]interface{}) (group, version, kind string) {

agent/kubviz/outdated.go

@@ -5,7 +5,6 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"github.com/intelops/kubviz/constants"
 	"log"
 	"os"
 	"regexp"
@@ -15,10 +14,12 @@ import (
 	"sync"
 	"time"
 
+	"github.com/intelops/kubviz/constants"
+
 	"github.com/intelops/kubviz/model"
 	"github.com/nats-io/nats.go"
 
-	"github.com/docker/docker/api/types"
+	types "github.com/docker/docker/api/types/registry"
 	"github.com/genuinetools/reg/registry"
 	semver "github.com/hashicorp/go-version"
 	"github.com/pkg/errors"
@@ -137,7 +138,7 @@ func ParseImageName(imageName string) (string, string, string, error) {
 	matches := dockerImageNameRegex.FindStringSubmatch(imageName)
 
 	if len(matches) != 5 {
-		return "", "", "", fmt.Errorf("Expected 5 matches in regex, but found %d", len(matches))
+		return "", "", "", fmt.Errorf("expected 5 matches in regex, but found %d", len(matches))
 	}
 
 	hostname := matches[1]
@@ -184,9 +185,7 @@ func ListImages(config *rest.Config) ([]model.RunningImage, error) {
 		for _, pod := range pods.Items {
 			for _, initContainerStatus := range pod.Status.InitContainerStatuses {
 				pullable := initContainerStatus.ImageID
-				if strings.HasPrefix(pullable, "docker-pullable://") {
-					pullable = strings.TrimPrefix(pullable, "docker-pullable://")
-				}
+				pullable = strings.TrimPrefix(pullable, "docker-pullable://")
 				runningImage := model.RunningImage{
 					Pod:           pod.Name,
 					Namespace:     pod.Namespace,
@@ -199,9 +198,8 @@ func ListImages(config *rest.Config) ([]model.RunningImage, error) {
 
 			for _, containerStatus := range pod.Status.ContainerStatuses {
 				pullable := containerStatus.ImageID
-				if strings.HasPrefix(pullable, "docker-pullable://") {
-					pullable = strings.TrimPrefix(pullable, "docker-pullable://")
-				}
+				pullable = strings.TrimPrefix(pullable, "docker-pullable://")
+
 				runningImage := model.RunningImage{
 					Pod:           pod.Name,
 					Namespace:     pod.Namespace,
@@ -393,8 +391,8 @@ func fetchTags(reg *registry.Registry, imageName string) ([]string, error) {
 }
 
 func parseTags(tags []string) ([]*semver.Version, []string, error) {
-	semverTags := make([]*semver.Version, 0, 0)
-	nonSemverTags := make([]string, 0, 0)
+	semverTags := make([]*semver.Version, 0)
+	nonSemverTags := make([]string, 0)
 
 	for _, tag := range tags {
 		v, err := semver.NewVersion(tag)
@@ -449,12 +447,12 @@ func splitOutlierSemvers(allSemverTags []*semver.Version) ([]*semver.Version, []
 	return outliers, remaining, nil
 }
 
-func homeDir() string {
-	if h := os.Getenv("HOME"); h != "" {
-		return h
-	}
-	return os.Getenv("USERPROFILE")
-}
+// func homeDir() string {
+// 	if h := os.Getenv("HOME"); h != "" {
+// 		return h
+// 	}
+// 	return os.Getenv("USERPROFILE")
+// }
 
 type VersionTag struct {
 	Sort    int    `json:"sort"`
@@ -547,7 +545,7 @@ func (c SemverTagCollection) Unique() ([]*semver.Version, error) {
 		}
 	}
 
-	result := make([]*semver.Version, 0, 0)
+	result := make([]*semver.Version, 0)
 	for _, u := range unique {
 		result = append(result, u)
 	}

agent/kubviz/trivy.go

@@ -63,6 +63,7 @@ func RunTrivyK8sClusterScan(js nats.JetStreamContext) error {
 	if err != nil {
 		return err
 	}
+	cleanupCache("/tmp/.cache")
 	return nil
 }
 

agent/kubviz/trivy_image.go

@@ -3,6 +3,7 @@ package main
 import (
 	"encoding/json"
 	"log"
+	"os"
 	"strings"
 
 	"github.com/aquasecurity/trivy/pkg/types"
@@ -47,6 +48,7 @@ func RunTrivyImageScans(config *rest.Config, js nats.JetStreamContext) error {
 		if err != nil {
 			return err
 		}
+		cleanupCache("/tmp/.cache")
 	}
 	return nil
 }
@@ -65,3 +67,12 @@ func publishImageScanReports(report types.Report, js nats.JetStreamContext) erro
 	log.Printf("Trivy image report with ID:%s has been published\n", metrics.ID)
 	return nil
 }
+
+func cleanupCache(cacheDir string) {
+	err := os.RemoveAll(cacheDir)
+	if err != nil {
+		log.Printf("Failed to clean up cache directory %s: %v", cacheDir, err)
+	} else {
+		log.Printf("Cache directory %s cleaned up successfully", cacheDir)
+	}
+}

agent/kubviz/trivy_sbom.go

@@ -78,6 +78,7 @@ func RunTrivySbomScan(config *rest.Config, js nats.JetStreamContext) error {
 
 		// Publish the report using the given function
 		publishTrivySbomReport(report, js)
+		cleanupCache("/tmp/.cache")
 	}
 	return nil
 }