Explain the prefix stuff a bit more

[saartuer.git] / tyshell

diff --git a/tyshell b/tyshell
index 9350e125272cd4f2ff7e046808ed0364d96ec2ff..4429c354a2102fbef3d0a75d937e3668921b3bc4 100755 (executable)
--- a/tyshell
+++ b/tyshell
@@ -63,12 +63,20 @@ while True:
                break
        command = shlex.split(command)
        if not len(command): continue
-       # execute command
-       if command[0] in commands:
+       # find suiting commands
+       if command[0] in commands: # needed in case a complete command is a prefix of another one
+               cmdoptions = [command[0]]
+       else:
+               cmdoptions = list(filter(lambda x: command[0].startswith(x), commands.keys()))
+       if len(cmdoptions) == 0: # no commands fit prefix
+               print("Command %s not found. Use help." % command[0])
+       elif len(cmdoptions) == 1: # exactly one command fits (prefix)
                try:
-                       commands[command[0]](command)
+                       commands[cmdoptions[0]](command)
                except Exception as e:
                        print("Error while executing %s: %s" % (command[0], str(e)))
-       else:
-               print("Command %s not found. Use help." % command[0])
+       else: # multiple commands fit the prefix
+               print("Ambiguous command prefix, please choose one of the following:")
+               print("\t", " ".join(cmdoptions))
+               # TODO: put current "command[0]" into the shell for the next command, but such that it is deletable with backspace