Activate Github Actions for the Jupytext repository

[mwouts]

Travis-CI is off for maintenance. Maybe it's a good time to give a try to Github actions?

Useful documentation:

• GitHub actions for Python: https://help.github.com/en/actions/language-and-framework-guides/using-python-with-github-actions
• GitHub actions for Miniconda: https://github.com/marketplace/actions/setup-miniconda

I'd like to test both the install with pip (requirements.txt and requirements-dev.txt) and with conda (environment.yml), at least on a linux worker.

[mwouts]

With 27e916c I have the following issues:

• Python 3.4 is not available (I will drop it)
• Flake 8 fails on the pip CI:

Lint with flake8
4s
##[error]Process completed with exit code 2.
Run # stop the build if there are Python syntax errors or undefined names
  # stop the build if there are Python syntax errors or undefined names
  flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
  all Python files should follow PEP8 (except some notebooks, see setup.cfg)
  flake8 jupytext tests
  # exit-zero treats all errors as warnings.  The GitHub editor is 127 chars wide
  flake8 . --count --exit-zero --max-complexity=10 --statistics
  shell: /bin/bash -e {0}
  env:
    pythonLocation: /opt/hostedtoolcache/Python/3.6.10/x64
0
/home/runner/work/_temp/98d1db20-f0af-4eba-af95-cb39421c77b0.sh: line 3: syntax error near unexpected token `('
##[error]Process completed with exit code 2.

• conda env create fails on the conda CI:

Run conda env create --file environment.yml
  conda env create --file environment.yml
  shell: /usr/bin/pwsh -command ". '{0}'"

EnvironmentFileNotFound: '/home/runner/work/jupytext/jupytext/environment.yml' file not found

##[error]Process completed with exit code 1.

Maybe the last two issues are a sign that I am not running these commands at the root of the jupytext repo?

[mwouts]

The error /home/runner/work/_temp/98d1db20-f0af-4eba-af95-cb39421c77b0.sh: line 3: syntax error near unexpected token "('" for the pip CI was caused by a missing comment char on the line all Python files should follow PEP8 (except some notebooks, see setup.cfg)

Now the pip CI is almost working - only the test for using Jupytext in a pre-commit hook fails with the following message:

*** Please tell me who you are.

Run

  git config --global user.email "[email protected]"
  git config --global user.name "Your Name"

Also, I am trying to fix the conda CI by passing the environment file and name to the goanpeca/setup-miniconda@v1 macro, cf. b31156d

[mwouts]

Based on this issue, I wrote a quick post on how to use GitHub actions - it's available here: https://github.com/mwouts/github_actions_python .