migration to swift 6

To migrate your app to Swift 6, Apple has provided a detailed process that involves several steps to ensure a smooth transition, especially focusing on data race safety. Here are some key points from the session "Migrate your app to Swift 6":

1. Incremental Migration: You can migrate to Swift 6 incrementally, one module at a time. This allows you to adopt the new language mode without waiting for all dependencies to migrate.

2. Concurrency Checking: Start by enabling complete concurrency checking in your project. This is a per-module setting that leaves your project in Swift 5 mode but enables warnings for code that would fail with Swift 6's enforced data isolation.

3. Resolving Warnings: Address all concurrency warnings in your code. The Swift compiler provides diagnostics to guide you towards potential issues, acting like a pair programmer.

4. Enabling Swift 6 Mode: Once all warnings are resolved for a module, enable Swift 6 mode. This locks in your changes and prevents future regressions to unsafe states.

5. Community Contribution: If you maintain a public Swift package, it's encouraged to adopt Swift 6 to help users who want to migrate their codebases.

For a practical demonstration of this process, you can refer to the session Migrate your app to Swift 6 (07:17) where they walk through the migration using a sample application.

Additionally, the session "Platforms State of the Union" highlights the importance of data race safety in Swift 6 and encourages updating open-source packages to contribute to the community-wide transition. You can find more about this in the Platforms State of the Union (31:22).

For more detailed guidance, you can refer to the Swift 6 migration guide available on swift.org.