Merge pull request wmayner#38 from TimothyFitz/copy-scipy-numpy-setup

Don't easy_install latest numpy if numpy is already available.

Author: wmayner

setup.py

@@ -92,9 +92,24 @@ def finalize_options(self):
     exec(f.read(), ABOUT)
 
 
-REQUIRES = [
-    'numpy >=1.9.0, <2.0.0'
-]
+NUMPY_REQUIREMENT = ['numpy >=1.9.0, <2.0.0']
+
+# Copied from scipy's installer, to solve the same issues they saw:
+
+# Figure out whether to add ``*_requires = ['numpy']``.
+# We don't want to do that unconditionally, because we risk updating
+# an installed numpy which fails too often.  Just if it's not installed, we
+# may give it a try.  See scipy gh-3379.
+try:
+    import numpy
+except ImportError:  # We do not have numpy installed
+    REQUIRES = NUMPY_REQUIREMENT
+else:
+    # If we're building a wheel, assume there already exist numpy wheels
+    # for this platform, so it is safe to add numpy to build requirements.
+    # See scipy gh-5184.
+    REQUIRES = (NUMPY_REQUIREMENT if 'bdist_wheel' in sys.argv[1:]
+                      else [])
 
 setup(
     name=ABOUT['__title__'],