Will the migration to biome v2 have many breaking changes?

[philippzentner]

Hey guys,

we'd love to make the switch from ESlint to biomejs but since we've an enterprise-scale backend, we want to make sure the migration to v2 will be more or less seamless. We're missing a bunch of stuff that would become available via v2 but we're keen to use the timeslot we have right now to do the big migration.

Could you shine some light on this?

Thank you!

[ematipico]

Yes, you should expect breaking changes in V2 because it's a major. I am not in a position to tell how much time the breaking changes could impact your code base, but I can say the following:

• biome migrate will handle all the breaking changes around configuration
• you'll have to update possible suppression comments of rules that were migrated
• the formatter will almost zero breaking changes, mostly taken care by migration unless you use CLI arguments
• ignore/include have been removed for a new glob syntax that should be more stable
• import sorting has been moved around and revamped, the migration should cover most of it