Explain the prefix stuff a bit more

[saartuer.git] / tyshell

diff --git a/tyshell b/tyshell
index 34ef515cbc8bccb05476368efcafc23ba44f7d8a..4429c354a2102fbef3d0a75d937e3668921b3bc4 100755 (executable)
--- a/tyshell
+++ b/tyshell
@@ -9,16 +9,17 @@ import socket
 tuerSock = "/run/tuer.sock"
 
 # use a histfile
-histfile = os.path.join(os.path.expanduser("~"), ".pyshellhist")
+histfile = os.path.join(os.path.expanduser("~"), ".tyshellhist")
 try:
     readline.read_history_file(histfile)
 except IOError:
     pass
 import atexit
 atexit.register(readline.write_history_file, histfile)
+atexit.register(print, "Bye")
 
 # available commands
-def help(c):
+def helpcmd(c):
        print("Available commands: %s" % ", ".join(sorted(commands.keys())))
 
 def extcmd(cmd):
@@ -41,9 +42,12 @@ def sendcmd(addr, cmd):
                        print("Received unexpected answer %s" % str(data))
        return run
 
+def exitcmd(c):
+       sys.exit(0)
+
 commands = {
-       'exit': None, # catched below, quits the loop
-       'help': help,
+       'exit': exitcmd,
+       'help': helpcmd,
        'open': sendcmd(tuerSock, 'open'),
        'close': sendcmd(tuerSock, 'close'),
        'buzz': sendcmd(tuerSock, 'buzz'),
@@ -59,14 +63,20 @@ while True:
                break
        command = shlex.split(command)
        if not len(command): continue
-       # execute command
-       if command[0] == "exit":
-               break
-       elif 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])
-print("Bye")
+       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
+