Extension points

phil/migration

The library declares no service: an application wires its two decorators into Doctrine Migrations — see Integration. What it implements is where messages go, and which migrations announce.

`Publisher`

Phil\Migration\Publisher — sends one message of an announcement. ChatterPublisher sends it through the chatter of symfony/notifier.

Method	Contract
`publish(string $transport, string $message): void`	Sends the message, already cut to the channel's length, on the named transport; throws when it cannot: the announcer logs it and leaves the rest of that channel, without failing the run

A publisher of the application's own sends anywhere else: a webhook, a mailing list, a log.

`Announcing`

Phil\Migration\Announcing — a migration that announces. AnnouncingMigrationFactory gives it the run's announcements.

Method	Contract
`announceWith(Announcements $announcements): void`	Keeps the announcements, for `note()` and `news()` to fill

AnnouncingMigration is the shipped base class; a base class of the application's own extends AbstractMigration, implements Announcing and uses the Announces trait.

Wiring

Point	How
The application's own `MigrationFactory` or `Migrator`	Wrapped by `AnnouncingMigrationFactory` and `AnnouncingMigrator` instead of the dependency factory's
Where and how a release is told	The `Channel`s given to `Announcer`: transport, locale, notes or news, titles and the longest message