Added info on semantic versioning and branching strategy to CONTRIBUT…

…ING.md

Also:
- Added isort to Pipenv dev
- Added setup.cfg to make it easy to run flake8, doc8, and isort directly from the command line without using invoke
- Ran isort to sort includes

CONTRIBUTING.md

@@ -65,7 +65,7 @@ The tables below list all prerequisites along with the minimum required version
 #### Additional prerequisites to build cmd2 documentation
 | Prerequisite                                | Minimum Version |
 | ------------------------------------------- | --------------- |
-| [sphinx](http://www.sphinx-doc.org)         | `1.4.9`         |
+| [sphinx](http://www.sphinx-doc.org)         | `2.0.0`         |
 | [sphinx-rtd-theme](https://github.com/snide/sphinx_rtd_theme) | `0.1.9` |
 
 #### Optional prerequisites for enhanced unit test features
@@ -211,7 +211,7 @@ pipenv install --dev
 To create a new virtualenv, using a specific version of Python you have installed (and on your PATH), use the 
 --python VERSION flag, like so:
 ```sh
-pipenv install --dev --python 3.7
+pipenv install --dev --python 3.8
 ```
 
 Then you can enter that virtual environment with:
@@ -221,8 +221,8 @@ pipenv shell
 
 #### Create a new environment for cmd2 using Conda
 ```sh
-$ conda create -n cmd2_py36 python=3.6
-$ conda activate cmd2_py36
+$ conda create -n cmd2_py37 python=3.7
+$ conda activate cmd2_py37
 ```
 
 #### Create a new environment for cmd using Virtualenv
@@ -233,13 +233,13 @@ We recommend that you use [pyenv](https://github.com/pyenv/pyenv) to manage your
 pyenv versions
 
 # Install python version defined
-pyenv install 3.6.3
+pyenv install 3.8.2
 ```
 With the Python version installed, you can set the virtualenv properly. 
 
 ```sh
 $ cd ~/src/cmd2
-$ virtualenv -p $(pyenv root)/versions/3.6.3/ cmd_py36 
+$ virtualenv -p $(pyenv root)/versions/3.8.2/ cmd_py38 
 $ source ~/src/cmd2/bin/activate
 ```
 
@@ -544,6 +544,33 @@ excellent support for debugging console applications.
 
 [PyCharm](https://www.jetbrains.com/pycharm/) is also quite good and has very nice [code inspection](https://www.jetbrains.com/help/pycharm/code-inspection.html) capabilities.
 
+## Branching Strategy and Semantic Versioning
+
+Starting with version 1.0.0, `cmd2` has adopted [Semantic Versioning](https://semver.org).
+
+### Semantic Versioning Summary
+Given a version number `MAJOR`.`MINOR`.`PATCH`, increment the:
+
+- `MAJOR` version when you make incompatible API changes,
+- `MINOR` version when you add functionality in a backwards compatible manner, and
+- `PATCH` version when you make backwards compatible bug fixes.
+
+### Branching Strategy
+
+We use the **master** branch for the upcoming `PATCH` release - i.e. if the current version
+of `cmd2` is 1.0.2, then the **master** branch contains code which is planned for release
+in 1.0.3.
+
+If work needs to be done for a `MAJOR` or `MINOR` release when we anticipate there will be
+a `PATCH` release in-between, then a branch should be created named for the appropriate version
+number for the work, e.g. if the current release of `cmd2` is 1.0.2 and a backwards-incompatible
+change needs to be committed for an upcoming `MAJOR` release, then this work should be committed
+to a **2.0.0** branch until such a time as we are ready to release version 2.0.0.
+
+Following this strategy, releases are always done from the **master** branch and `MAJOR` or `MINOR`
+branches are merged to **master** immediately prior to doing a release.  Once merged to **master**, the
+other branches can be deleted.  All releases are tagged so that they can be reproduced if necessary.
+
 ## Publishing a new release
 
 Since 0.9.2, the process of publishing a new release of `cmd2` to [PyPi](https://pypi.org/) has been

Pipfile

@@ -18,6 +18,7 @@ flake8 = "*"
 gnureadline = {version = "*",sys_platform = "== 'darwin'"}
 invoke = "*"
 ipython = "*"
+isort = "*"
 mock = {version = "*",markers = "python_version < '3.6'"}
 plumbum = "*"
 pyreadline = {version = "*",sys_platform = "== 'win32'"}

cmd2/ansi.py

@@ -6,10 +6,10 @@
 import functools
 import re
 from enum import Enum
-from typing import Any, IO, List, Union
+from typing import IO, Any, List, Union
 
 import colorama
-from colorama import Fore, Back, Style
+from colorama import Back, Fore, Style
 from wcwidth import wcswidth
 
 # On Windows, filter ANSI escape codes out of text sent to stdout/stderr, and replace them with equivalent Win32 calls

cmd2/argparse_completer.py

@@ -14,10 +14,16 @@
 from typing import Dict, List, Optional, Union
 
 from . import ansi, cmd2, constants
-from .argparse_custom import ATTR_CHOICES_CALLABLE, generate_range_error
-from .argparse_custom import ATTR_SUPPRESS_TAB_HINT, ATTR_DESCRIPTIVE_COMPLETION_HEADER, ATTR_NARGS_RANGE
-from .argparse_custom import ChoicesCallable, CompletionItem
-from .utils import basic_complete, CompletionError
+from .argparse_custom import (
+    ATTR_CHOICES_CALLABLE,
+    ATTR_DESCRIPTIVE_COMPLETION_HEADER,
+    ATTR_NARGS_RANGE,
+    ATTR_SUPPRESS_TAB_HINT,
+    ChoicesCallable,
+    CompletionItem,
+    generate_range_error,
+)
+from .utils import CompletionError, basic_complete
 
 # If no descriptive header is supplied, then this will be used instead
 DEFAULT_DESCRIPTIVE_HEADER = 'Description'

cmd2/argparse_custom.py

@@ -203,7 +203,7 @@ def my_completer_method(self, text, line, begidx, endidx, arg_tokens)
 import re
 import sys
 # noinspection PyUnresolvedReferences,PyProtectedMember
-from argparse import ZERO_OR_MORE, ONE_OR_MORE, ArgumentError, _
+from argparse import ONE_OR_MORE, ZERO_OR_MORE, ArgumentError, _
 from typing import Callable, Optional, Tuple, Type, Union
 
 from . import ansi, constants

cmd2/cmd2.py

@@ -42,17 +42,14 @@
 from contextlib import redirect_stdout
 from typing import Any, Callable, Dict, Iterable, List, Mapping, Optional, Tuple, Type, Union
 
-from . import ansi
-from . import constants
-from . import plugin
-from . import utils
-from .argparse_custom import CompletionItem, DEFAULT_ARGUMENT_PARSER
+from . import ansi, constants, plugin, utils
+from .argparse_custom import DEFAULT_ARGUMENT_PARSER, CompletionItem
 from .clipboard import can_clip, get_paste_buffer, write_to_paste_buffer
 from .decorators import with_argparser
 from .exceptions import Cmd2ArgparseError, Cmd2ShlexError, EmbeddedConsoleExit, EmptyStatement, RedirectionError
 from .history import History, HistoryItem
-from .parsing import StatementParser, Statement, Macro, MacroArg, shlex_split
-from .rl_utils import rl_type, RlType, rl_get_point, rl_set_prompt, vt100_support, rl_make_safe_prompt, rl_warning
+from .parsing import Macro, MacroArg, Statement, StatementParser, shlex_split
+from .rl_utils import RlType, rl_get_point, rl_make_safe_prompt, rl_set_prompt, rl_type, rl_warning, vt100_support
 from .utils import CompletionError, Settable
 
 # Set up readline

cmd2/history.py

@@ -4,7 +4,6 @@
 """
 
 import re
-
 from typing import List, Union
 
 import attr

cmd2/parsing.py

@@ -8,8 +8,7 @@
 
 import attr
 
-from . import constants
-from . import utils
+from . import constants, utils
 from .exceptions import Cmd2ShlexError
 
 

cmd2/py_bridge.py

@@ -5,10 +5,10 @@
 """
 
 import sys
-from contextlib import redirect_stdout, redirect_stderr
+from contextlib import redirect_stderr, redirect_stdout
 from typing import Optional
 
-from .utils import namedtuple_with_defaults, StdSim
+from .utils import StdSim, namedtuple_with_defaults
 
 
 class CommandResult(namedtuple_with_defaults('CommandResult', ['stdout', 'stderr', 'stop', 'data'])):

cmd2/rl_utils.py

@@ -2,8 +2,8 @@
 """
 Imports the proper readline for the platform and provides utility functions for it
 """
-from enum import Enum
 import sys
+from enum import Enum
 
 # Prefer statically linked gnureadline if available (for macOS compatibility due to issues with libedit)
 try:

docs/conf.py

@@ -17,10 +17,9 @@
 add these directories to sys.path here. If the directory is relative to the
 documentation root, use os.path.abspath to make it absolute, like shown here.
 """
-from pkg_resources import get_distribution
-
 # Import for custom theme from Read the Docs
 import sphinx_rtd_theme
+from pkg_resources import get_distribution
 
 # -- General configuration -----------------------------------------------------
 

examples/alias_startup.py

@@ -5,6 +5,7 @@
     2) How to run an initialization script at startup
 """
 import os
+
 import cmd2
 
 

examples/argparse_completion.py

@@ -6,8 +6,8 @@
 import argparse
 from typing import Dict, List
 
-from cmd2 import Cmd, Cmd2ArgumentParser, with_argparser, CompletionItem
-from cmd2.utils import basic_complete, CompletionError
+from cmd2 import Cmd, Cmd2ArgumentParser, CompletionItem, with_argparser
+from cmd2.utils import CompletionError, basic_complete
 
 # Data source for argparse.choices
 food_item_strs = ['Pizza', 'Ham', 'Ham Sandwich', 'Potato']

examples/async_printing.py

@@ -10,7 +10,7 @@
 from typing import List
 
 import cmd2
-from cmd2 import style, fg
+from cmd2 import fg, style
 
 ALERTS = ["Watch as this application prints alerts and updates the prompt",
           "This will only happen when the prompt is present",

examples/basic.py

@@ -9,7 +9,7 @@
     6) Shell-like capabilities
 """
 import cmd2
-from cmd2 import style, fg, bg
+from cmd2 import bg, fg, style
 
 
 class BasicApp(cmd2.Cmd):

examples/colors.py

@@ -26,9 +26,10 @@
 import argparse
 from typing import Any
 
+from colorama import Back, Fore, Style
+
 import cmd2
 from cmd2 import ansi
-from colorama import Fore, Back, Style
 
 
 class CmdLineApp(cmd2.Cmd):

examples/custom_parser.py

@@ -4,8 +4,7 @@
 """
 import sys
 
-from cmd2 import Cmd2ArgumentParser, set_default_argument_parser
-from cmd2 import ansi
+from cmd2 import Cmd2ArgumentParser, ansi, set_default_argument_parser
 
 
 # First define the parser

examples/exit_code.py

@@ -2,9 +2,10 @@
 # coding=utf-8
 """A simple example demonstrating the following how to emit a non-zero exit code in your cmd2 application.
 """
-import cmd2
 from typing import List
 
+import cmd2
+
 
 class ReplWithExitCode(cmd2.Cmd):
     """ Example cmd2 application where we can specify an exit code when existing."""

examples/hooks.py

@@ -10,7 +10,6 @@
 """
 
 import re
-
 from typing import List
 
 import cmd2

examples/initialization.py

@@ -13,7 +13,7 @@
     10) How to make custom attributes settable at runtime
 """
 import cmd2
-from cmd2 import style, fg, bg
+from cmd2 import bg, fg, style
 
 
 class BasicApp(cmd2.Cmd):

examples/migrating.py

@@ -3,9 +3,8 @@
 """
 A sample application for cmd which can be used to show how to migrate to cmd2.
 """
-import random
-
 import cmd
+import random
 
 
 class CmdLineApp(cmd.Cmd):

examples/override_parser.py

@@ -10,12 +10,14 @@
 # See the code for custom_parser.py. It simply defines a parser and calls cmd2.set_default_argument_parser()
 # with the custom parser's type.
 import argparse
-argparse.cmd2_parser_module = 'examples.custom_parser'
 
 # Next import stuff from cmd2. It will import your module just before the cmd2.Cmd class file is imported
 # and therefore override the parser class it uses on its commands.
 from cmd2 import cmd2
 
+argparse.cmd2_parser_module = 'examples.custom_parser'
+
+
 if __name__ == '__main__':
     import sys
     app = cmd2.Cmd(use_ipython=True, persistent_history_file='cmd2_history.dat')

examples/plumbum_colors.py

@@ -27,9 +27,10 @@
 """
 import argparse
 
+from plumbum.colors import bg, fg
+
 import cmd2
 from cmd2 import ansi
-from plumbum.colors import fg, bg
 
 
 class FgColors(ansi.ColorBase):

examples/scripts/arg_printer.py

@@ -2,6 +2,7 @@
 # coding=utf-8
 import os
 import sys
+
 print("Running Python script {!r} which was called with {} arguments".format(os.path.basename(sys.argv[0]),
                                                                              len(sys.argv) - 1))
 for i, arg in enumerate(sys.argv[1:]):

examples/subcommands.py

@@ -7,6 +7,7 @@
 and provides separate contextual help.
 """
 import argparse
+
 import cmd2
 
 sport_item_strs = ['Bat', 'Basket', 'Basketball', 'Football', 'Space Ball']

examples/unicode_commands.py

@@ -3,6 +3,7 @@
 """A simple example demonstrating support for unicode command names.
 """
 import math
+
 import cmd2
 
 

setup.cfg

@@ -0,0 +1,17 @@
+[flake8]
+exclude = .git,.idea,.pytest_cache,.tox,.venv,.vscode,build,cmd2.egg-info,dist,htmlcov,__pycache__,*.egg
+max-line-length = 127
+max-complexity = 26
+
+[isort]
+line_length=127
+skip=cmd2/__init__.py
+multi_line_output = 3
+include_trailing_comma = true
+force_grid_wrap = 0
+use_parentheses = true
+
+[doc8]
+ignore-path=docs/_build,.git,.idea,.pytest_cache,.tox,.venv,.vscode,build,cmd2,examples,tests,cmd2.egg-info,dist,htmlcov,__pycache__,*.egg
+;max-line-length=99
+verbose=0

setup.py

@@ -4,6 +4,7 @@
 Setuptools setup file, used to install or test 'cmd2'
 """
 import codecs
+
 from setuptools import setup
 
 DESCRIPTION = "cmd2 - quickly build feature-rich and user-friendly interactive command line applications in Python"

tasks.py

@@ -15,6 +15,7 @@
 
 import invoke
 
+
 # shared function
 def rmrf(items, verbose=True):
     "Silently remove a list of directories or files"