Fixes and additions: (#20)

- fix encryption bug #19, which was a regression
- added encryption unit test
- added debug logging here and there

Co-authored-by: Thomas von Dein <tom@vondein.org>

main.go

@@ -19,6 +19,7 @@ package main
 import (
 	"bufio"
 	"fmt"
+	"log/slog"
 	"os"
 	"runtime"
 
@@ -27,9 +28,31 @@ import (
 )
 
 func main() {
+	const NoLogsLevel = 100
+	slog.SetLogLoggerLevel(NoLogsLevel)
+
 	Main()
 }
 
+func init() {
+	// if we're running on Windows  AND if the user double clicked the
+	// exe  file from explorer, we  tell them and then  wait until any
+	// key has been hit, which  will make the cmd window disappear and
+	// thus give the user time to read it.
+	if runtime.GOOS == "windows" {
+		if mousetrap.StartedByExplorer() {
+			fmt.Println("Do no double click kleingebaeck.exe!")
+			fmt.Println("Please open a command shell and run it from there.")
+			fmt.Println()
+			fmt.Print("Press any key to quit: ")
+			_, err := bufio.NewReader(os.Stdin).ReadString('\n')
+			if err != nil {
+				panic(err)
+			}
+		}
+	}
+}
+
 func Main() int {
 	cmd.Execute()
 	return 0