Update CI to Github Actions

[bradyrx]

Description

Updates CI to Github Actions.

Closes #454

To-Do

• Add install tests for different operating systems (but not tests)

[bradyrx]

Okay there's ways to install conda with one of their already installed miniconda setups: https://github.com/marketplace/actions/setup-conda

[bradyrx]

FYI before we merge this we need to change the "branches" to either "master" or some variable for current branch. I made it dummy3 so it would immediately run on this.

[aaronspring]

Fails very uninformative...

Error: The operation was canceled.

[aaronspring]

Although for py37 esmpy is the problem. https://github.com/pangeo-data/climpred/pull/471/checks?check_run_id=1184207681

[aaronspring]

Making xesmf and esmpy optional should also happen. Just covers the smoothing. Actually .interp_like also does a decent job

[bradyrx]

See second tol ast comment JiaweiZhuang/xESMF#47 (comment). I think if you install xesmf before esmpy it should work.

[bradyrx]

That ordering works

name: xesmf_v3
channels:
  - conda-forge
  - defaults
dependencies:
  - xesmf
  - esmpy
  - dask

[aaronspring]

We should switch to pangeo xesmf anyways but they are not on pypi

[aaronspring]

Does pip install esmpy not work? Looks like that. Also pip not included here http://www.earthsystemmodeling.org/esmf_releases/non_public/ESMF_7_0_0/esmpy_doc/html/install.html#installing-esmpy

[bradyrx]

Yeah we should go ahead and switch over to that conda plugin for actions I linked. We can have a testing.yml req file with this minimum number of packages we set up here. I'm happy to do that tomorrow or Thursday unless yo uwant to try now.

[aaronspring]

Maybe calling it minimum.yml

[bradyrx]

Picking this up from where you left off.

[bradyrx]

Need to switch to CodeCov. See coverallsapp/github-action#30. Coveralls doesn't integrate well here. Testing that now..

[bradyrx]

Looks like actually test_versions was breaking with main(). Need to check that htat's necessary. I don't think that's ever called since the file isn't called directly. People just use print_versions

[codecov]

Codecov Report

Merging #471 into master will increase coverage by 94.32%.
The diff coverage is 94.61%.

@@             Coverage Diff             @@
##           master     #471       +/-   ##
===========================================
+ Coverage    0.00%   94.32%   +94.32%     
===========================================
  Files          12       50       +38     
  Lines        1040     4760     +3720     
===========================================
+ Hits            0     4490     +4490     
+ Misses       1040      270      -770     

Impacted Files	Coverage Δ
climpred/metrics.py	93.22% <ø> (+93.22%)	⬆️
climpred/preprocessing/mpi.py	25.00% <25.00%> (ø)
climpred/tests/test_preprocessing.py	53.73% <53.73%> (ø)
climpred/preprocessing/shared.py	60.00% <60.00%> (ø)
climpred/versioning/print_versions.py	61.33% <61.33%> (ø)
climpred/testing.py	80.76% <80.76%> (ø)
climpred/tests/test_metrics.py	81.57% <81.57%> (ø)
climpred/relative_entropy.py	82.69% <85.71%> (+82.69%)	⬆️
climpred/smoothing.py	87.50% <87.50%> (ø)
climpred/tutorial.py	79.03% <87.50%> (ø)
... and 83 more

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[bradyrx]

All done in parallel so those all ran fast. Gotta figure out if I need both "push" and "pull request"

[aaronspring]

it runs so fast. I dont think pytest is running

[bradyrx]

it runs so fast. I dont think pytest is running

It is running. Click "details" then click the "run tests" dropdown. We don't install all the extra packages and so on with this new environment.

[aaronspring]

Do we need to test against py36 37 and 38? Isn’t one enough?

[bradyrx]

Do we need to test against py36 37 and 38? Isn’t one enough?

Yes I think we definitely should. New versions could cause breaking changes we're unaware of. Most other big packages test against these versions. I think it's fine anyways since they're being run in parallel so it isn't a loss of time for us.

[bradyrx]

Also, the linter is breaking on flake8 with style issues that don't exist for me.. I'm confused.

[aaronspring]

Do we need to test against py36 37 and 38? Isn’t one enough?

Yes I think we definitely should. New versions could cause breaking changes we're unaware of. Most other big packages test against these versions. I think it's fine anyways since they're being run in parallel so it isn't a loss of time for us.

I think with these multiple env tests we absolutely make the downloads number unreliable. but probably CI is already the majority of downloads. I just dont see which breaking change could come and why we need to test every PR against these. I understand that we should do this once in a while (e.g. before releasing)

[bradyrx]

Do we need to test against py36 37 and 38? Isn’t one enough?

Yes I think we definitely should. New versions could cause breaking changes we're unaware of. Most other big packages test against these versions. I think it's fine anyways since they're being run in parallel so it isn't a loss of time for us.

I think with these multiple env tests we absolutely make the downloads number unreliable. but probably CI is already the majority of downloads. I just dont see which breaking change could come and why we need to test every PR against these. I understand that we should do this once in a while (e.g. before releasing)

We aren't downloading climpred in the CI. It's now installing it via minimum-tests which looks like this:

name: climpred-minimum-tests
channels:
  - conda-forge
  - defaults
dependencies:
  - xesmf
  - esmpy
  - dask
  - netcdf4
  - ipython
  - nc-time-axis
  - coveralls
  - pytest
  - pytest-cov
  - pip
  - pip:
    - pytest-lazy-fixture
    - -e ../..

The last line installs climpred via pip locally.

[bradyrx]

Worth adding this. Found out if you install climpred from scratch it doesn't work without ipython and toolz installs.

[aaronspring]

This is a great improvement. Hard work and very good for our project here.