rails 8 support

[sebyx07]

Rails 8 Support

This PR adds support for Rails 8 while maintaining backward compatibility with Rails 7.1+.

🚀 Motivation

With Rails 8.0 now released, this gem needs to support the latest Rails version to enable users to upgrade their applications. Several users have requested this update to unblock their Rails 8 migrations.

📋 Changes Made

Version & Dependencies:

• Bump gem version from 3.1.0 → 8.0.0 (aligned with Rails major version for easier tracking)
• Update ActiveRecord dependency: '>= 7.1', '< 9' (supports Rails 7.1, 7.2, and 8.0+)
• Drop support for Rails 6.x (breaking change)

CI & Testing:

• Update GitHub Actions to test against Rails 8.0 and Rails 7.1
• Upgrade Ruby version in CI to 3.4.1
• Remove Rails 6.1 test matrix (no longer supported)
• Add Gemfile.7.1 for backward compatibility testing

🧪 Testing

• ✅ All existing tests pass on Rails 8.0
• ✅ All existing tests pass on Rails 7.1 (backward compatibility verified)
• ✅ Production tested - Running successfully in production for ~1 month (confirmed by @zaratan)

⚠️ Breaking Changes

• Minimum Rails version: Now requires Rails 7.1+ (was 5.2+)
• Version jump: 3.1.0 → 8.0.0 (semantic versioning for major breaking change)

Migration path for older Rails versions:

• Rails < 7.1: Use jit_preloader v3.1.0
• Rails 7.1+: Use jit_preloader v8.0.0+

[zaratan]

Hey @sebyx07 did you try this on a Rails 8 stack in a production context ?

[sebyx07]

yeah

[zaratan]

Thanks. I'll use it and report if I see any issue on my side.

[zaratan]

In case anyone needs a feedback : Seems to run perfectly in production since about a month.

[ryansdwilson]

Hey @samsarkleio we love this gem over at getwalter.com (half of us are former Clions! Ainsley Robertson, Jordan Raine, Joe Krump and Ying Ying Choi) would love to see you guys merge this to unblock the rails 8 upgrade! Thanks for sharing Jit preloader with the world

[samsarkleio]

@clio/application-security Could we get the second review here and merge this in?

[peerkleio]

As this new version also changes the minimum supported version of Rails the Readme should be updated to let users know what version of this gem they need depending on what version of Rails they have. Or, a note that mentions the minimum supported version of Rails

[sebyx07]

cleaned up

[liamloxton]

Interesting, I've never seen version specific Gemfile.lock files before. I think I would need to be walked through this a little to better understand what is happening here in order to give a proper review.

[Drew-Goddyn]

nitpick... not sure these needed to change 🙈

[liamloxton]

I mean, ya, now it alternates between single and double quotes. :P

[Drew-Goddyn]

Any reason we're jumping versions from 3 -> 8 for this?

[sebyx07]

to keep it in sync with rails, because this gem patches ar. it's simpler to then update it

[Drew-Goddyn]

Few small comments, looks fine otherwise. Can we include a PR description, even if its just re-iterating that we're upgrading to rails 8 and requiring the minimum version.

@jnraine 👋

[sebyx07]

@ryansdwilson just self host the gem meanwhile, depending on others suck. this is what i do https://github.com/geminabox/geminabox

[anhari]

@sebyx07, looks like we are good to merge this one.

[liamloxton]

This is enabled by default in Ruby 3.4

[liamloxton]

Besides the ' vs " mixing and the redundant # frozen_string_literal: true, looks good.

[ryansdwilson]

Thank you Clio squad! Appreciate your work on this.