Adjust setup.py's install_requires

[warsaw]

setup.py limits setuptools in its install_requires to >=2.2,<8. This breaks the build of pex on Ubuntu 15.04 where we have setuptools 12.2. It'll break on Debian too after Jessie is released.

I added the following very simple patch, which so far seems to fix the problem (more testing ahead).

--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@
     'pex.bin',
   ],
   install_requires = [
-    'setuptools>=2.2,<8',
+    'setuptools>=2.2',
   ],
   tests_require = [
     'mock',

[wickman]

The only gotcha here is pkg_resources becoming a package. I have a branch that removes this requirement as well. I think the following is the only diff necessary:

diff --git a/pex/pex_builder.py b/pex/pex_builder.py
index aef19e6..8b9911d 100644
--- a/pex/pex_builder.py
+++ b/pex/pex_builder.py
@@ -300,7 +300,7 @@ class PEXBuilder(object):
       raise RuntimeError('Failed to find setuptools while building pex!')

     for fn, content_stream in DistributionHelper.walk_data(setuptools):
-      if fn == 'pkg_resources.py' or fn.startswith('_markerlib'):
+      if fn.startswith('pkg_resources') or fn.startswith('_markerlib'):
         self._chroot.write(content_stream.read(), os.path.join(self.BOOTSTRAP_DIR, fn), 'resource')
         wrote_setuptools = True