Dependency issue when building docs according to instructions

[jbusecke]

Code Sample, a copy-pastable example if possible

I was following the instructions to build the docs locally, using xarray/ci/requirements-py36 as test environment.

When running make html in the xarray/doc folder, I get this:

xarray: 0.12.1+9.gfad6d624.dirty, /Users/juliusbusecke/Work/CODE/PYTHON/xarray/xarray/__init__.py

Extension error:
Could not import extension IPython.sphinxext.ipython_directive (exception: No module named 'IPython')
make: *** [html] Error 2
(test_env)

After installing ipython with conda install ipython, the build works properly.

Should this line conda install -c conda-forge sphinx sphinx_rtd_theme sphinx-gallery numpydoc be updated to:
conda install -c conda-forge sphinx sphinx_rtd_theme sphinx-gallery numpydoc ipython ?

Or am I overlooking something?

[dcherian]

There is an environment.yml file in the doc folder that contains ipython, so yes that line should be fixed. PR? :)