ENH strict channel priority for linux

[beckermr]

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

This PR turns on strict channel priority for linux on all builds.

cc @isuruf @ocefpaf @conda-forge/core

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[beckermr]

@conda-forge-admin rerender

[github-actions]

Hi! This is the friendly automated conda-forge-webservice.
I tried to rerender for you, but it looks like there was nothing to do.

[beckermr]

Great @xhochy! I want to make sure @isuruf sees this before it goes in as well.

[ocefpaf]

So happy this is finally going in! I've been pushing for this since before Matt was a member :-)

[beckermr]

@ocefpaf did you want to enable this for all platforms? Right now this PR only does this for linux.

[isuruf]

In the last meeting, there was a request to add a conda-forge.yml option for this.

[jjhelmus]

Is there a method for feedstocks to opt-out of this? There are a few packages that require tensorflow >=2 which is only available in defaults. Turning this on without an option to opt-out makes this un-buildable until new tensorflow packages are added to conda-forge or the older packages are removed.

[beckermr]

ack - happy to do that

the default needs to be set to yes iiuic, right

[beckermr]

thanks for the reminder all!

I will make a change to smithy. closing!

[jjhelmus]

the default needs to be set to yes iiuic, right

That sounds great, default to strict but with an escape hatch for the handful of feedstock that need to opt-out

[isuruf]

You can read conda-forge.yml here.

[ocefpaf]

@ocefpaf did you want to enable this for all platforms? Right now this PR only does this for linux.

I know. But it is a start ;-p
We need to get our act together on the scipy package to make the same on Windows. Not sure what are the hurdles on macOS.

[isuruf]

There are no hurdles on macOS.

[ocefpaf]

There are no hurdles on macOS.

[xhochy]

Please also make an announcement for this!

[beckermr]

ok @ocefpaf @isuruf @xhochy @jjhelmus @conda-forge/core any other comments here?

[beckermr]

doc pull here: conda-forge/conda-forge.github.io#1112

[isuruf]

Can you send a PR for docs too if you have the time?

[beckermr]

LOL yup!

[isuruf]

This is failing on osx,

2020-07-24T15:54:51.6438850Z +++ shyaml get-value channel_priority strict
2020-07-24T15:54:51.6456570Z cat: /conda-forge.yml: No such file or directory
2020-07-24T15:54:51.6967720Z Error: invalid path 'channel_priority', can't query subvalue 'channel_priority' of a leaf (leaf value is None).