fix some coding style issues

Signed-off-by: Boyang Lyu <boyangly@gmail.com>

client/http/api.go

@@ -79,7 +79,7 @@ const (
 	Status              = "/pd/api/v1/status"
 	Version             = "/pd/api/v1/version"
 	operators           = "/pd/api/v1/operators"
-	safepoint           = "pd/api/v1/gc/safepoint"
+	safepoint           = "/pd/api/v1/gc/safepoint"
 	// Micro Service
 	microServicePrefix = "/pd/api/v2/ms"
 	// Keyspace

client/http/interface.go

@@ -1029,28 +1029,28 @@ func (c *client) GetKeyspaceMetaByName(ctx context.Context, keyspaceName string)
 
 // GetGCSafePoint get the gc_safepoint
 func (c *client) GetGCSafePoint(ctx context.Context) (ListServiceGCSafepoint, error) {
-	var gcsafepoint ListServiceGCSafepoint
+	var gcSafePoint ListServiceGCSafepoint
 	err := c.request(ctx, newRequestInfo().
 			WithName(GetGCSafePointName).
 			WithURI(safepoint).
 			WithMethod(http.MethodGet).
-			WithResp(&gcsafepoint))
+			WithResp(&gcSafePoint))
 	if err != nil {
-		return gcsafepoint, err
+		return gcSafePoint, err
 	}
-	return gcsafepoint, nil
+	return gcSafePoint, nil
 }
 
-// DeleteGCSafePoint deletes a gc_safepoint
-func (c *client) DeleteGCSafePoint(ctx context.Context, service_id string) (string, error) {
+// DeleteGCSafePoint deletes a gc safepoint
+func (c *client) DeleteGCSafePoint(ctx context.Context, serviceId string) (string, error) {
 	var msg string
 	err := c.request(ctx, newRequestInfo().
 			WithName(DeleteGCSafePointName).
-			WithURI(safepoint+"/"+service_id).
+			WithURI(safepoint+"/"+serviceId).
 			WithMethod(http.MethodDelete).
 			WithResp(&msg))
 	if err != nil {
 		return msg, err
 	}
 	return msg, nil
-}
+}

tools/pd-ctl/pdctl/command/gc_safepoint_command.go

@@ -15,9 +15,7 @@
 package command
 
 import (
-	"encoding/json"
 	"sort"
-
 	"github.com/spf13/cobra"
 )
 
@@ -52,12 +50,7 @@ func showSSPs(cmd *cobra.Command, _ []string) {
 	sort.Slice(safepoint.ServiceGCSafepoints, func(i, j int) bool {
 		return safepoint.ServiceGCSafepoints[i].SafePoint < safepoint.ServiceGCSafepoints[j].SafePoint
 	})
-	data, err := json.MarshalIndent(safepoint, "", "  ")
-	if err != nil {
-		cmd.Printf("Failed to marshal service GC safepoint: %s\n", err)
-		return
-	}
-	jsonPrint(cmd, string(data))
+	jsonPrint(cmd, safepoint)
 }
 
 func deleteSSP(cmd *cobra.Command, args []string) {