Try for resolving dependencies install

MANIFEST.in

@@ -7,4 +7,5 @@ recursive-include doc/sphinx/source *.txt *.rst *.py
 include doc/sphinx/make.bat
 include doc/sphinx/Makefile
 include README.txt
+include requirements.txt
 

distutils.ext/obidistutils/core.py

@@ -8,6 +8,14 @@ from os import path
 import os.path
 import glob
 
+
+try:
+    from setuptools import setup as ori_setup
+    has_setuptools = True
+except ImportError:
+    from distutils.core import setup as ori_setup
+    has_setuptools = False
+
 from distutils.core import setup as ori_setup
 from distutils.extension import Extension
 
@@ -119,6 +127,18 @@ CEXES  =[]
 FILES  =[]
 
 def setup(**attrs):
+    
+    if has_setuptools:
+        try:
+            requirements = open('requirements.txt').readlines()
+            requirements = [x.strip() for x in requirements]
+    
+            if 'install_requires' not in attrs:
+                attrs['install_requires']=requirements
+            else:
+                attrs['install_requires'].extend(requirements)
+        except IOError:
+            pass
 
     if 'distclass' not in attrs:
         attrs['distclass']=Distribution
@@ -141,13 +161,6 @@ def setup(**attrs):
     if 'cmdclass' not in attrs:
         attrs['cmdclass'] = COMMANDS
 
-    if 'requires' not in attrs:
-        attrs['requires'] = []
-    
-    attrs['requires'].append('Cython (>=0.21)')
-    attrs['requires'].append('Sphinx (>=1.2.0)')
-    attrs['requires'].append('wheel  (>=0.24.0)')
-    attrs['requires'].append('virtualenv (>=1.11.0)')
 
     if 'ctools' not in attrs:
         attrs['ctools'] = CTOOLS

requirements.txt

+-i https://pypi.python.org/simple/
+Cython>=0.21
+Sphinx>=1.2.0
+wheel>=0.24.0
+virtualenv>=1.11.0