[Bug python/16699] New: GDB Python command completion with overriden complete vs. completer class

["sergiodj at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16699

            Bug ID: 16699
           Summary: GDB Python command completion with overriden complete
                    vs. completer class
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: python
          Assignee: sergiodj at redhat dot com
          Reporter: sergiodj at redhat dot com

This bug is a clone of a Red Hat bug.

create a file completion.py and add the below lines:

---------------------------------------
class MyFirstCommand(gdb.Command):
    def __init__(self):
       
gdb.Command.__init__(self,'myfirstcommand',gdb.COMMAND_USER,gdb.COMPLETE_FILENAME)

    def invoke(self,argument,from_tty):
        raise gdb.GdbError('not implemented')

class MySecondCommand(gdb.Command):
    def __init__(self):
        gdb.Command.__init__(self,'mysecondcommand',gdb.COMMAND_USER)

    def invoke(self,argument,from_tty):
        raise gdb.GdbError('not implemented')

    def complete(self,text,word):
        return gdb.COMPLETE_FILENAME

MyFirstCommand ()
MySecondCommand ()
--------------------------------------------------
>gdb

(gdb) source completion.py 
(gdb) mysecondcommand /home      <- that is the issue  
(gdb) myfirstcommand /home/
fotis/      lost+found/ 


Actual results:

(gdb) myfirstcommand /h<TAB>
it completes to /home/ and offers files within that directory

However for:
(gdb) mysecondcommand /h<TAB>
it completes to /home<SPACE> 

My command doesn't take directories, so I really want completion to work as for
the first command.

Is this expected GDB behavior? How do I make it work?

Expected results:

(gdb) mysecondcommand /home/
fotis       lost+found

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