掌握Composer插件的作用与特点

{
    "name": "example/plugin",
    "description": "A Composer plugin example",
    "type": "composer-plugin",
    "require": {
        "composer-plugin-api": "^1.1"
    },
    "autoload": {
        "psr-4": {
            "Example\Plugin\": "src/"
        }
    },
    "extra": {
        "class": "Example\Plugin\Plugin"
    }
}

<?php

namespace ExamplePlugin;

use ComposerComposer;
use ComposerIOIOInterface;
use ComposerPluginPluginInterface;

class Plugin implements PluginInterface
{
    public function activate(Composer $composer, IOInterface $io)
    {
        // 在此处定义插件在激活时的逻辑
    }

    public function deactivate(Composer $composer, IOInterface $io)
    {
        // 在此处定义插件在停用时的逻辑
    }

    public function uninstall(Composer $composer, IOInterface $io)
    {
        // 在此处定义插件在卸载时的逻辑
    }
}

public function activate(Composer $composer, IOInterface $io)
{
    // 生成优化后的自动加载文件
    $generator = $composer->getAutoloadGenerator();
    $generator->dump();
}

public function activate(Composer $composer, IOInterface $io)
{
    // 注册一个新的命令
    $command = new MyCommand();
    $composer->getCommandExecutor()->reGISter($command);
}

public static function getSubscribedEvents()
{
    return [
        ScriptEvents::POST_INSTALL_CMD => 'onPostInstallCmd',
        ScriptEvents::PRE_AUTOLOAD_DUMP => 'onPreAutoloadDump',
    ];
}

public function onPostInstallCmd(Event $event)
{
    // 在安装命令之后执行的逻辑
}

public function onPreAutoloadDump(Event $event)
{
    // 在自动加载文件生成之前执行的逻辑
}