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Add upgrade note for custom installers

pull/8949/head
Jordi Boggiano 2020-06-05 10:36:40 +02:00
parent c9571f90b4
commit 90425a6a50
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UPGRADE-2.0.md
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@ -17,6 +17,7 @@
- `PluginInterface` added a deactivate (so plugin can stop whatever it is doing) and an uninstall (so the plugin can remove any files it created or do general cleanup) method.
- Plugins implementing `EventSubscriberInterface` will be deregistered from the EventDispatcher automatically when being deactivated, nothing to do there.
- `Pool` objects are now created via the `RepositorySet` class, you should use that in case you were using the `Pool` class directly.
- Custom installers extending from LibraryInstaller should be aware that in Composer 2 it MAY return PromiseInterface instances when calling parent::install/update/uninstall/installCode/removeCode. See [composer/installers](https://github.com/composer/installers/commit/5006d0c28730ade233a8f42ec31ac68fb1c5c9bb) for an example of how to handle this best.
- The `Composer\Installer` class changed quite a bit internally, but the inputs are almost the same:
- `setAdditionalInstalledRepository` is now `setAdditionalFixedRepository`
- `setUpdateWhitelist` is now `setUpdateAllowList`