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75 lines
2.1 KiB
Markdown
75 lines
2.1 KiB
Markdown
<!--
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tagline: Script are callbacks that are called before/after installing packages
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-->
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# Scripts
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## What is a script?
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A script is a callback (defined as a static method) that will be called
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when the event it listens on is triggered.
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**Scripts are only executed on the root package, not on the dependencies
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that are installed.**
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## Event types
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- **pre-install-cmd**: occurs before the install command is executed.
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- **post-install-cmd**: occurs after the install command is executed.
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- **pre-update-cmd**: occurs before the update command is executed.
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- **post-update-cmd**: occurs after the update command is executed.
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- **pre-package-install**: occurs before a package is installed.
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- **post-package-install**: occurs after a package is installed.
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- **pre-package-update**: occurs before a package is updated.
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- **post-package-update**: occurs after a package is updated.
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- **pre-package-uninstall**: occurs before a package has been uninstalled.
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- **post-package-uninstall**: occurs after a package has been uninstalled.
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## Defining scripts
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Scripts are defined by adding the `scripts` key to a project's `composer.json`.
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They are specified as an array of classes and static method names.
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The classes used as scripts must be autoloadable via Composer's autoload
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functionality.
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Script definition example:
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{
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"scripts": {
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"post-update-cmd": "MyVendor\\MyClass::postUpdate",
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"post-package-install": [
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"MyVendor\\MyClass::postPackageInstall"
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]
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}
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}
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The event handler receives a `Composer\Script\Event` object as an argument,
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which gives you access to the `Composer\Composer` instance through the
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`getComposer` method.
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Using the previous example, here's an event listener example :
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<?php
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namespace MyVendor;
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use Composer\Script\Event;
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class MyClass
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{
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public static function postUpdate(Event $event)
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{
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$composer = $event->getComposer();
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// do stuff
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}
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public static function postPackageInstall(Event $event)
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{
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$installedPackage = $event->getOperation()->getPackage();
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// do stuff
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}
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}
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