fix #181, use python_requires (from pip 9)

appveyor.yml

@@ -12,16 +12,7 @@ init:
   - "ECHO %PYTHON%"
   - ps: "ls C:/Python*"
 install:
-  #- ps: (new-object net.webclient).DownloadFile('https://raw.github.com/pypa/pip/master/contrib/get-pip.py', 'C:/get-pip.py')
-  #- "%PYTHON%/python.exe C:/get-pip.py"
-  #- "%PYTHON%/Scripts/pip.exe install --upgrade setuptools"
-
-  # Explicitly install pytest from NOT the wheel distribution to ensure it
-  # works with Python 2.7.
-  # See: https://github.com/pytest-dev/pytest/issues/749
-  #      https://bitbucket.org/pytest-dev/pytest/issues/749/
-  - "%PYTHON%/python.exe -m pip install -U pip"
-  - "%PYTHON%/Scripts/pip.exe install -U setuptools pytest --no-binary all"
+  - "%PYTHON%/python.exe -m pip install -U pip setuptools"
 
   - "%PYTHON%/Scripts/pip.exe install ."
   - "%PYTHON%/Scripts/pip.exe install -r dev_requirements.txt"

doc/install.rst

@@ -11,11 +11,11 @@ Installing
 Latest version of `doit` supports only python 3.
 If you are using python 2::
 
-  $ pip install doit==0.29.0
+  $ pip install "doit<0.30"
 
 * `Download <http://pypi.python.org/pypi/doit>`_ the source and::
 
-  $ python setup.py install
+  $ pip install -e .
 
 * Get latest development version::
 

setup.py

@@ -1,33 +1,27 @@
 #! /usr/bin/env python3
 
+from __future__ import print_function
 import sys
 
 from setuptools import setup
 
 
-install_requires = ['cloudpickle']
-
 
 ########### last version to support python2 is 0.29 ####
-if sys.version_info[0] < 3:
-    sys.exit('This version of doit is only supported by Python 3.\n' +
-             'Please use doit==0.29.0 with Python 2.')
+try:
+    import pip
+    pip_version = tuple([int(x) for x in pip.__version__.split('.')[:3]])
+    if pip_version < (9, 0, 1) :
+        pip_message = 'Your pip version is out of date, please install pip >= 9.0.1. '\
+                      'pip {} detected.'.format(pip.__version__)
+        print(pip_message, file=sys.stderr)
+        sys.exit(1)
+except Exception:
+    # what if someone does not have pip installed
+    pass
 
 ########################################################
 
-########### platform specific stuff #############
-import platform
-platform_system = platform.system()
-
-# auto command dependencies to watch file-system
-if platform_system == "Darwin":
-    install_requires.append('macfsevents')
-elif platform_system == "Linux":
-    install_requires.append('pyinotify')
-
-##################################################
-
-
 
 long_description = """
 `doit` is a task management & automation tool
@@ -77,14 +71,12 @@
       keywords = "build make task automation pipeline",
 
       packages = ['doit'],
-      install_requires = install_requires,
-      # extra_requires with environment markers can be used only
-      # newer versions of setuptools that most users do not have
-      # installed. So wait for a while before use them (2017-02)
-      # extras_require={
-      #     ':sys.platform == "darwin"': ['macfsevents'],
-      #     ':sys.platform == "linux"': ['pyinotify'],
-      # },
+      python_requires='>=3.4',
+      install_requires = ['cloudpickle'],
+      extras_require={
+          ':sys.platform == "darwin"': ['macfsevents'],
+          ':sys.platform == "linux"': ['pyinotify'],
+      },
       long_description = long_description,
       entry_points = {
           'console_scripts': [