treat doc building warnings as errors

Author: Erik Bernhardsson

.travis.yml

@@ -12,7 +12,7 @@ before_install:
   - docker build -t jsonschema2db .
   # Make sure Sphinx works
   - pip install . sphinx
-  - sphinx-build -M html docs/ docs/_build/
+  - sphinx-build -M html docs/ docs/_build/ -W
 
 script:
   - docker run jsonschema2db

docs/conf.py

@@ -100,7 +100,7 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+# html_static_path = ['_static']
 
 # Custom sidebar templates, must be a dictionary that maps document names
 # to template names.