On Zsh the tab-completion ignores the -f and -k command line options.

• If there is no dodo.py file, only a some_dodo.py file in the current directory and the -f command line option is given, an error is thrown when trying to perform tab-completion:

  $ doit -f some_dodo.py [tab]ERROR: Could not find dodo file '$PWD/dodo.py'.
  Please use '-f' to specify file name.
  

  Expected behaviour: Instead of throwing an error, the normal tab-completion should be performed (i.e, a list of tasks defined in some_dodo.py should be printed).
• If the dodo.py is in a parent directory and the -k command line option is given, the tab-completion fails, too.

  $ doit -k [tab]ERROR: Could not find dodo file '$PWD/dodo.py'.
  Please use '-f' to specify file name.
  

  Expected behaviour: Instead of throwing an error, a list of tasks defined e.g. in ../dodo.py should be printed.

In both cases, if there is a dodo.py file in the current directory, the tasks defined in this file are listed.

Tested version:

$ doit --version
0.31.1
$ zsh --version           
zsh 5.4.2 (x86_64-ubuntu-linux-gnu)