Cancel previous running workflows on push

[devmotion]

Just learnt about https://github.com/styfle/cancel-workflow-action from JuliaDiff/ChainRules.jl#426. Seems this could solve #281.

I followed the instructions in https://github.com/styfle/cancel-workflow-action#advanced-pull-requests-from-forks which should also work for PRs from forks.

[mzgubic]

It doesn't seem like it ran, did it?

[devmotion]

IIRC this type of actions always uses the version on master for security reasons. It doesn't exist currently so it's not run.

[devmotion]

It is mentioned in the documentation:

Note: This event will only trigger a workflow run if the workflow file is on the default branch.

[devmotion]

Of course, this makes it difficult to assess if the action works properly here 😄

@willtebbutt @theogf What do you think, should we just try it and see if it works and possibly fix it in follow-up PRs?

[willtebbutt]

Yeah, let's do it, 🤞

[theogf]

Go for it!

[devmotion]

It seems to be at least somewhat correct and working: https://github.com/JuliaGaussianProcesses/KernelFunctions.jl/actions/runs/897590843