Fix bug, wrap debug logs

main.go

@@ -6,11 +6,14 @@ import (
 	"time"
 	"os/exec"
 	"bytes"
+	"log"
 )
 
 
 func main() {
 	interval := flag.Duration("i", 100*time.Millisecond, "Clipboard polling interval")
+	debug := flag.Bool("d", false, "Debug output")
+	lotsofDebug := flag.Bool("dd", false, "Full debug")
 	flag.Parse()
 
 	fmt.Println("Starting clipboard sync")
@@ -19,34 +22,43 @@ func main() {
 	var unified string
 	for range time.NewTicker(*interval).C {
 		primary := getVal("-p")
-		if primary != unified {
+		if *lotsofDebug {
+			log.Println("Primary:", primary)
+		}
+		if primary != "" && primary != unified {
 			unified = primary
 			setVal(unified)
-			fmt.Println("Setting clip to", unified)
+			if *debug {
+				fmt.Println("Setting clip to", unified)
+			}
+			continue
 		}
 
 		selection := getVal()
-		if selection != unified {
+		if *lotsofDebug {
+			log.Println("Selection:", primary)
+		}
+		if selection != "" && selection != unified {
 			unified = selection
 			setVal(unified, "-p")
-			fmt.Println("Setting primary to", unified)
+			if *debug {
+				fmt.Println("Setting primary to", unified)
+			}
 		}
 	}
 }
 
 func getVal(args ...string) string {
 	args = append(args, "-n")
-	out, err := exec.Command("wl-paste", args...).Output()
-	if err != nil {
-		panic(err)
-	}
+	out, _ := exec.Command("wl-paste", args...).Output()
 	return string(out)
 }
 
 func setVal(val string, args... string) {
-	cmd := exec.Command("wl-copy")
+	cmd := exec.Command("wl-copy", args...)
 	cmd.Stdin = bytes.NewBufferString(val)
 	if err := cmd.Run(); err != nil {
-		panic(err)
+		log.Printf("Failed to get paste buffer value (%v): %v", args, err)
+		log.Printf("Value in question: %q", val)
 	}
 }