First attempt at building using setuptools

These changes reflect the same approach as outlined in this issue:
readthedocs/readthedocs.org#5512

Author: liamtoney

.readthedocs.yml

@@ -1 +1,9 @@
 version: 2
+
+formats:
+  - pdf
+
+python:
+   install:
+      - method: setuptools
+        path: .

doc/conf.py

@@ -8,8 +8,12 @@
 
 author = 'David Fee & Liam Toney'
 
-extensions = ['sphinx.ext.autodoc', 'sphinx.ext.napoleon',
-              'sphinx.ext.intersphinx', 'recommonmark', 'sphinx.ext.viewcode']
+extensions = ['sphinx.ext.autodoc',
+              'sphinx.ext.napoleon',
+              'sphinx.ext.intersphinx',
+              'recommonmark',
+              'sphinx.ext.viewcode'
+              ]
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
@@ -22,4 +26,13 @@
 
 master_doc = 'index'
 
-autodoc_mock_imports = ['waveform_collection']
+autodoc_mock_imports = ['numpy',
+                        'matplotlib',
+                        'xarray',
+                        'cartopy',
+                        'osgeo',
+                        'obspy',
+                        'utm',
+                        'scipy',
+                        'mpl_toolkits'
+                        ]

environment.yml

@@ -1,7 +1,15 @@
 from setuptools import setup, find_packages
+import os
+
+# https://github.com/readthedocs/readthedocs.org/issues/5512#issuecomment-475073310
+on_rtd = os.environ.get('READTHEDOCS') == 'True'
+if on_rtd:
+    INSTALL_REQUIRES = []
+else:
+    INSTALL_REQUIRES = ['waveform_collection']
 
 setup(
       name='rtm',
       packages=find_packages(),
-      install_requires='waveform_collection'
+      install_requires=INSTALL_REQUIRES
       )