0.9.0 (May 28, 2018)

• Bug Fixes
  • If self.default_to_shell is true, then redirection and piping are now properly passed to the shell. Previously it was truncated.
  • Submenus now call all hooks, it used to just call precmd and postcmd.
• Enhancements
  • Automatic completion of argparse arguments via cmd2.argparse_completer.AutoCompleter
    • See the tab_autocompletion.py example for a demonstration of how to use this feature
  • cmd2 no longer depends on the six module
  • cmd2 is now a multi-file Python package instead of a single-file module
  • New pyscript approach that provides a pythonic interface to commands in the cmd2 application.
  • Switch command parsing from pyparsing to custom code which utilizes shlex.
    • The object passed to do_* methods has changed. It no longer is the pyparsing object, it's a new Statement object, which is a subclass of str. The statement object has many attributes which give you access to various components of the parsed input. If you were using anything but the string in your do_* methods, this change will require you to update your code.
    • commentGrammers is no longer supported or available. Comments are C-style or python style.
    • Input redirection no longer supported. Use the load command instead.
    • multilineCommand attribute is now multiline_command
    • identchars is now ignored. The standardlibrary cmd uses those characters to split the first "word" of the input, but cmd2 hasn't used those for a while, and the new parsing logic parses on whitespace, which has the added benefit of full unicode support, unlike cmd or prior versions of cmd2.
    • set_posix_shlex function and POSIX_SHLEX variable have been removed. Parsing behavior is now always the more forgiving posix=false.
    • set_strip_quotes function and STRIP_QUOTES_FOR_NON_POSIX have been removed. Quotes are stripped from arguments when presented as a list (a la sys.argv), and present when arguments are presented as a string (like the string passed to do_*).
• Changes
  • strip_ansi() and strip_quotes() functions have moved to new utils module
  • Several constants moved to new constants module
  • Submenu support has been moved to a new cmd2-submenu plugin. If you use submenus, you will need to update your dependencies and modify your imports.
• Deletions (potentially breaking changes)
  • Deleted all optparse code which had previously been deprecated in release 0.8.0
    • The options decorator no longer exists
    • All cmd2 code should be ported to use the new argparse-based decorators
    • See the Argument Processing section of the documentation for more information on these decorators
    • Alternatively, see the argparse_example.py
  • Deleted cmd_with_subs_completer, get_subcommands, and get_subcommand_completer
    • Replaced by default AutoCompleter implementation for all commands using argparse
  • Deleted support for old method of calling application commands with cmd() and self
  • cmd2.redirector is no longer supported. Output redirection can only be done with '>' or '>>'
  • Deleted postparse() hook since it was redundant with postparsing_precmd
• Python 2 no longer supported
  • cmd2 now supports Python 3.4+
• Known Issues
  • Some developers have noted very slow performance when importing the cmd2 module. The issue
    it intermittant, and investigation of the root cause is ongoing.