lbcctl: support --timed, --quiet options

cmd/lbcctl/config.go

@@ -111,6 +111,8 @@ type config struct {
 	SigNet         bool   `long:"signet" description:"Connect to signet (default RPC server: localhost:49245)"`
 	Wallet         bool   `long:"wallet" description:"Connect to wallet RPC server instead (default: localhost:9244, testnet: localhost:19244, regtest: localhost:29244)"`
 	ShowVersion    bool   `short:"V" long:"version" description:"Display version information and exit"`
+	Timed          bool   `short:"t" long:"timed" description:"Display RPC response time"`
+	Quiet          bool   `short:"q" long:"quiet" description:"Do not output results to stdout"`
 }
 
 // normalizeAddress returns addr with the passed default port appended if

cmd/lbcctl/lbcctl.go

@@ -9,6 +9,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/lbryio/lbcd/btcjson"
 )
@@ -133,6 +134,8 @@ func main() {
 		os.Exit(1)
 	}
 
+	started := time.Now()
+
 	// Send the JSON-RPC request to the server using the user-specified
 	// connection configuration.
 	result, err := sendPostRequest(marshalledJSON, cfg)
@@ -141,6 +144,16 @@ func main() {
 		os.Exit(1)
 	}
 
+	if cfg.Timed {
+		elapsed := time.Since(started)
+		defer fmt.Fprintf(os.Stderr, "%s\n", elapsed)
+	}
+
+	var output io.Writer = os.Stdout
+	if cfg.Quiet {
+		output = io.Discard
+	}
+
 	// Choose how to display the result based on its type.
 	strResult := string(result)
 	if strings.HasPrefix(strResult, "{") || strings.HasPrefix(strResult, "[") {
@@ -150,7 +163,7 @@ func main() {
 				err)
 			os.Exit(1)
 		}
-		fmt.Println(dst.String())
+		fmt.Fprintln(output, dst.String())
 
 	} else if strings.HasPrefix(strResult, `"`) {
 		var str string
@@ -159,9 +172,9 @@ func main() {
 				err)
 			os.Exit(1)
 		}
-		fmt.Println(str)
+		fmt.Fprintln(output, str)
 
 	} else if strResult != "null" {
-		fmt.Println(strResult)
+		fmt.Fprintln(output, strResult)
 	}
 }