chore(logs): add output format option to logs command (#447)

Signed-off-by: Navin Chandra <[email protected]>

Author: navin772

cmd/log.go

@@ -33,6 +33,7 @@ func init() {
 	logCmd.Flags().StringVar(&logOptions.LogPath, "logPath", "stdout", "Output location for alerts and logs, {path|stdout|none}")
 	logCmd.Flags().StringVar(&logOptions.LogFilter, "logFilter", "policy", "Filter for what kinds of alerts and logs to receive, {policy|system|all}")
 	logCmd.Flags().BoolVar(&logOptions.JSON, "json", false, "Flag to print alerts and logs in the JSON format")
+	logCmd.Flags().StringVarP(&logOptions.Output, "output", "o", "text", "Output format: text, json, or pretty-json")
 	logCmd.Flags().StringVarP(&logOptions.Namespace, "namespace", "n", "", "k8s namespace filter")
 	logCmd.Flags().StringVar(&logOptions.Operation, "operation", "", "Give the type of the operation (Eg:Process/File/Network)")
 	logCmd.Flags().StringVar(&logOptions.LogType, "logType", "", "Log type you want (Eg:ContainerLog/HostLog) ")

log/log.go

@@ -48,6 +48,7 @@ type Options struct {
 	LogPath          string
 	LogFilter        string
 	JSON             bool
+	Output           string
 	Namespace        string
 	LogType          string
 	Operation        string
@@ -152,7 +153,7 @@ func StartObserver(c *k8s.Client, o Options) error {
 		return nil
 	}
 
-	// create client
+	// create client
 	logClient, err := NewClient(gRPC, o, c.K8sClientset)
 	if err != nil {
 		if !o.Secure && !isDialingError(err) {

log/logClient.go

@@ -4,6 +4,7 @@
 package log
 
 import (
+	"bytes"
 	"context"
 	"encoding/json"
 	"errors"
@@ -406,8 +407,18 @@ func WatchTelemetryHelper(arr []byte, t string, o Options) {
 		o.EventChan <- EventInfo{Data: arr, Type: t}
 	}
 
-	if o.JSON {
+	if o.JSON || o.Output == "json" {
 		str = fmt.Sprintf("%s\n", string(arr))
+	} else if o.Output == "pretty-json" {
+
+		var prettyJSON bytes.Buffer
+		err = json.Indent(&prettyJSON, arr, "", "  ")
+
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Failed to prettify JSON (%s)\n", err.Error())
+		}
+		str = fmt.Sprintf("%s\n", prettyJSON.String())
+
 	} else {
 
 		if time, ok := res["UpdatedTime"]; ok {