Roadmap

Short Term

Settle the open questions of the migration guideline

The review of PR 11430 raised three questions that concern every migration and were deliberately not answered for single components there. They should be decided in docs/component-bootstrap-migration.md and then be applied to the already migrated components at once:

• FQDN instead of imports in <Component>.php: currently a recommendation, not a rule.
• Naming of interface and implementation: the migrated components use <Interface> with <Interface>Impl or Default<Interface>; alternatives on the table are separate Interface/Implementation namespaces (as in the UI framework) and the PSR style <Name>Interface.
• Closure or proxy to retrieve a dependency late: closures are used where a dependency is not available at build time (VirusScannerPreProcessor) or to break a cycle (ResourceStorage\StorageHandler\Migrator). The guideline should say whether this is acceptable or whether a named proxy is expected.

A fourth point worth a sentence in the guideline: the bootstrap validates $implement[] with instanceof, so services that share an implementation but are wired as distinct types (like the six configured filesystems) need one class per type.

Mid Term

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Long Term

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