make analytics install optional

README.rst

@@ -7,11 +7,11 @@ Features
 ========
 
 CloudBrain is a platform for real-time sensor data analysis and
-visualization. 
+visualization.
 
-- **Stream sensor data** in a unified format. 
-- **Store sensor data** in a central database. 
-- **Analyze sensor data** to find patterns. 
+- **Stream sensor data** in a unified format.
+- **Store sensor data** in a central database.
+- **Analyze sensor data** to find patterns.
 - **Visualize sensor data** and patterns in real-time.
 
 .. figure:: https://raw.githubusercontent.com/cloudbrain/cloudbrain/master/docs/images/features.png
@@ -30,9 +30,9 @@ Setup
 Optional
 --------
 
-Optional CloudBrain modules can be installed: 
-
-- Muse source module: ``pip install .[muse] --user`` *(Python ``3.*`` only)* 
+Optional CloudBrain modules can be installed:
+- Analytics modules: ``pip install .[analytics] --user``
+- Muse source module: ``pip install .[muse] --user`` *(Python ``3.*`` only)*
 
 Run the tests
 -------------

requirements/analytics.txt

@@ -0,0 +1,3 @@
+scipy==0.18.1
+numpy==1.11.2
+mne==0.10.0

requirements.txt → requirements/core.txt

@@ -1,7 +1,4 @@
 simplejson==3.8.2
 pika==0.10
-numpy==1.11.2
-scipy==0.18.1
-pyserial==2.7
-mne==0.10.0
 requests[security]==2.18.1
+pyserial==2.7

requirements/muse.txt

@@ -0,0 +1 @@
+python-osc==1.6

setup.py

@@ -4,15 +4,23 @@
 import os
 
 # Get __version__ and set other constants.
-exec(open(os.path.join('src', 'cloudbrain', 
-                       'version.py')).read())
+# Source: https://stackoverflow.com/a/16084844
+with open(os.path.join('src', 'cloudbrain', 'version.py'), 'r') as f:
+    exec(f.read())
 URL = 'https://github.com/cloudbrain/cloudbrain'
 DOWNLOAD_URL='%s/archive/%s.tar.gz' % (URL, __version__)
 DESCRIPTION = open('README.rst').read()
 
-# Requirements
-install_reqs = parse_requirements('requirements.txt', session=PipSession())
-reqs = [str(ir.req) for ir in install_reqs]
+# Helper function for requirements parsing by requirement type
+def parse_reqs(req_type):
+    reqs_file = os.path.join('requirements', '%s.txt' % req_type)
+    install_reqs = parse_requirements(reqs_file, session=PipSession())
+    reqs = [str(ir.req) for ir in install_reqs]
+    return reqs
+
+# Get requirements for all types
+REQUIREMENT_TYPES = ['core', 'analytics', 'muse']
+reqs = {req_type: parse_reqs(req_type) for req_type in REQUIREMENT_TYPES}
 
 setup(name='cloudbrain',
       version=__version__,
@@ -23,7 +31,7 @@
       download_url=DOWNLOAD_URL,
       package_dir={'': 'src'},
       packages=find_packages('src'),
-      install_requires=reqs,
+      install_requires=reqs['core'],
       long_description=DESCRIPTION,
       test_suite='nose.collector',
       tests_require=['mock==1.0.1', 'nose'],
@@ -33,7 +41,8 @@
           "cloudbrain.schema": ["*.json"]
       },
       extras_require={
-          'muse:python_version>="3"': ['python-osc==1.6'],
+          'muse:python_version>="3"': reqs['muse'],
+          'analytics': reqs['analytics']
       },
       entry_points = {
         'console_scripts':