Make channel (formerly known as julia-version) optional?

[davidanthoff]

I think that could be optional, with a default value of release?

[DilumAluthge]

That seems reasonable. Here's one question though: what happens if/when a Julia 2.0 is released (in the distant future, if it ever does happen)? If we default to release, then users will automatically have their workflows start running on Julia 2.0, without any change on their end. Could that be problematic?

Would it make sense to instead default to the 1 channel? And then, if/when Julia 2.0 is released, we would make a breaking release of this action, in which we changed the default value in action.yml from 1 to 2? And then, users of this action won't automatically get upgraded to Julia 2.0 until they merge the Dependabot PR to upgrade to the new breaking release of this action?

[davidanthoff]

Yeah, it is a trade-off... I think I'm leaning towards either making it mandatory (i.e. leave as is) or making the default release, i.e. your on your own... I think I'm not a huge fan of making 1 the default, don't really have a good reason, but somehow I would then like a mandatory input more ;) I'll post this on the slack channel, maybe others have thoughts.

[DilumAluthge]

We didn't get any further feedback from Slack.

Between keeping it mandatory (leaving the current behavior in place), and defaulting to release, I think I'd prefer we keep it mandatory. I don't love the idea of someone's workflow suddenly switching from Julia 1.x to Julia 2.x without any manual intervention on their part.