support Faraday 2.x

[jrochkind]

googleauth gemspec has a dependency on "faraday", ">= 0.17.3", "< 2.0".

Faraday 2.0.0 was released on Jan 4 2021.

An app using googleauth (or anything that depends on it) can't upgrade to faraday 2.0 unless/until googleauth's specification is relaxed.

Could googleauth be verified and released for faraday 2.0?

https://github.com/lostisland/faraday/blob/main/UPGRADING.md

[renchap]

As an alternative to upgrading to Faraday 2, please consider dropping the dependency on Faraday, as it often results in conflicts with other gems or apps that use Faraday and major version bumps might be hard to manage.

[dleavitt]

Here's some prior art from Sentry, who switched their Ruby client from Faraday to net/http in response to the 2.0 release:
getsentry/sentry-ruby#1678

They retained the ability to use Faraday via making the transport layer pluggable. Seems like a good approach!

[jrochkind]

Faraday as I understand it was already meant to be a pluggable transport layer you can re-use.

Faraday 2.0 is pretty backwards compat, just a few tweaks. Replacing it with your own home-built "pluggable transport layer" would be a lot more work than just upgrading to faraday 2, and based on lack of response to this issue I'm guessing there isn't a lot of maintenance energy behind this gem....

I'm not sure I understand why sentry decided faraday 2.0 was "major changes" that justified a switch.

I'd be happy with either personally, anything that lets me use faraday 2.x in my project that also has this in my dependency tree! I suspect just supporting faraday 2.x as well as 1.x will be the least work.

If this project currently has CI with good coverage that's working and green (haven't checked), and if a committer shows up to say they're paying attention and would review, I could probably find time to submit a PR allowing both faraday 1.x or faraday 2.x. (I have successfully modified other gems to allow faraday 1.x as well as 2.x)

But either change is fine with me if someone else does it; and neither change is going to happen if the committers are missing in action!

[dazuma]

I'm pretty sure we can relax the gemspec to allow faraday 2.x.