insupportable 0.1.1.6

Some stupid badges:

.. image:: https://badge.fury.io/py/insupportable.png
:target: http://badge.fury.io/py/insupportable


.. image:: https://travis-ci.org/Carreau/insupportable.png?branch=master
:target: https://travis-ci.org/Carreau/insupportable

I am really annoyed, more and more, especially in old project to figure out what code is a war a workaround
for old version of python, or another library.

This library should provide a simple way to warn you as early as possible when you can remove some legacy code,
that deals with unsupported library version.

By default come pre-configured with Python 2/3 convenience function, but works
with other libraries and more fine grained version numbering.

.. code-block::

# warn you you have dead code if you
# drop Python2 support
from insupportable import support
if support('PY2'):
print("You are on python 2")
else:
print("You are on python 3")


.. code-block::

# warn you you have dead code if you
# drop Python2 support
from insupportable import support
if support('PY3'):
print("You are on python 3")
else:
print("You are on python 2")


Set it up to drop Python2 support.
----------------------------------

Quick and dirty way, modify global config, which is not recommended as it may
affect other libraries that use this too, but super usefull.

.. code-block::

support.config(PY2=False)

if support(PY2):
print("You are on python 2")
else:
print("You are on python 3")


warn the following:

.. code-block::

mymodule/myfile.py:3: UserWarning: You are not supporting PY2 anymore
if support(PY2):
mymodule/myfile.py:3: UserWarning: PY2 is the last supported feature of this group, you can simplifiy this logic.
if support(PY2):

More involve way, create a config context that have effect only locally:

.. code-block::

from insupportable import S

support = S(PY2=False).support

....

Advance configuration/custom features:
--------------------------------------

Example:

.. code-block::
support.config(config=({
'WindowsPhone':True,
'Android' :False,
'iOS' :False
},))
if support('WindowsPhone'):
print('Click on start menu')
else:
print("Probably Android - but you don't support it anymore")

.. code-block::
mymodule/myfile.py:1: UserWarning: WindowsPhone is the last supported feature of this group, you can simplifiy this logic.
if support('WindowsPhone'):




TODO:
-----

Write predicates and document like:

.. code-block::

if workaround('tornado==2.2'):
# do something special


The predicate would decide wether or not to yield depending on the version of `tornado`,
and warn if min tornado is higher than 2.2


Deprecation decorator:

.. code-block::

@deprecated_since('2.3.1',will_remove='3.0.0')
def my_api('something'):
"""deprecated fucntion that should
warn user when function is **called**

when module version is >= 3.0, the decorator should warn **developper** at **compile** time
that code has to be removed.
"""

This case is more interesting than `support()` as there is 2 pass, the decoration of the function itsef,
and the execution of the function. `will_remove` should infer next major I guess.
Should we add option to deprecate after/at a date for some case like API.

.. code-block::

@deprecate_after(date='2015/10/15'):
def marty_from_the_future(self):
"""
Docs has some invalid ssl certificates ?
"""





* Free software: MIT license
* Documentation: https://insupportable.readthedocs.org.