Merge pull request #986 from efiop/master

setup: use extras_require for backward compatibility

dvc/__init__.py

@@ -5,7 +5,7 @@ Make your data science projects reproducible and shareable.
 """
 import os
 
-VERSION_BASE = '0.16.4'
+VERSION_BASE = '0.16.5'
 __version__ = VERSION_BASE
 
 PACKAGEPATH = os.path.abspath(os.path.dirname(__file__))

setup.py

@@ -23,7 +23,6 @@ install_requires = [
     "jsonpath-rw==1.4.0",
     "reflink==0.2.0",
     "requests>=2.18.4",
-    'futures; python_version == "2.7"',
 ]
 
 # Extra dependencies for remote integrations
@@ -57,6 +56,8 @@ setup(
         's3': s3,
         'azure': azure,
         'ssh': ssh,
+        # NOTE: https://github.com/inveniosoftware/troubleshooting/issues/1
+        ':python_version=="2.7"': ['futures'],
     },
     keywords='data science, data version control, machine learning',
     classifiers=[