首页 下一页：App\Http\Kernel内核实例化的流程注解
-
composer create-project laravel/laravel 运行此命令触发的玩意是啥？
此命令相当于直接clone git上的仓库
仓库并下载composer.json指定的第三方扩展包
现在我们去看一下这个文件的内容
{ "name": "laravel/laravel",//包名 "type": "project",//包的安装类型，一般有project,library,metapackage,composer-plugin "description": "The Laravel Framework.", "keywords": [ "framework", "laravel" ], "license": "MIT", "require": { "php": "^7.1.3", "fideloper/proxy": "^4.0",//依赖的第三方扩展包，安装时会下载下来 "laravel/framework": "5.8.*",//laravel的核心包，同样安装时下载下来 "laravel/tinker": "^1.0"//同理 }, "require-dev": { "beyondcode/laravel-dump-server": "^1.0", "filp/whoops": "^2.0", "fzaninotto/faker": "^1.4", "mockery/mockery": "^1.0", "nunomaduro/collision": "^3.0", "phpunit/phpunit": "^7.5" }, "config": {//可查看https://docs.phpcomposer.com/04-schema.html#config说明 "optimize-autoloader": true, "preferred-install": "dist", "sort-packages": true }, "extra": { "laravel": { "dont-discover": [] } }, "autoload": {//应用运行时自动加载的根命名空间对应的应用目录 "psr-4": { "App\\": "app/" }, "classmap": [ "database/seeds", "database/factories" ] }, "autoload-dev": { "psr-4": { "Tests\\": "tests/" } }, "minimum-stability": "dev", "prefer-stable": true, "scripts": {//composer脚本，安装过程中触发的脚本命令https://docs.phpcomposer.com/articles/scripts.html "post-autoload-dump": [//事件名称 "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump", "@php artisan package:discover --ansi" ], "post-root-package-install": [//安装期间触发 "@php -r \"file_exists('.env') || copy('.env.example', '.env');\"" ], "post-create-project-cmd": [//安装完后触发 "@php artisan key:generate --ansi" ] } }composer脚本运行命令
post-autoload-dump 时做的事情
首先我们去找这个文件Illuminate\\Foundation\\ComposerScripts::postAutoloadDumpIlluminate\Foundation\ComposerScripts的postAutoloadDump内容
public static function postAutoloadDump(Event $event) { require_once $event->getComposer()->getConfig()->get('vendor-dir').'/autoload.php'; static::clearCompiled(); }
它使用的是Composer/Script/Event类，具体API可以自己看一下 composer API
$event->getComposer()返回Composer对象
再返回Config对象
再获取vendor目录
最终引入autoload.php文件用于类的自动加载，这个没问题吧
继续来看一下它的下一步
protected static function clearCompiled() { //实例化Application【具体实例化后干嘛了，后面说】 $laravel = new Application(getcwd()); //如果文件bootstrap/cache/services.php存在则删除 if (file_exists($servicesPath = $laravel->getCachedServicesPath())) { @unlink($servicesPath); } //如果文件bootstrap/cache/packages.php存在则删除 if (file_exists($packagesPath = $laravel->getCachedPackagesPath())) { @unlink($packagesPath); } }
文件目录位置
@php artisan package:discover --ansi命令所做的事情
它对应的文件内容是【package:discover控制台命令，后面会说console，当前laravel5.5版本有说明】 laravel5.5LTS版本有注解，我就直接扔代码在这里了，不清楚的自己去看
<?php namespace Illuminate\Foundation\Console; use Illuminate\Console\Command; use Illuminate\Foundation\PackageManifest; class PackageDiscoverCommand extends Command { /** * The console command signature. * * @var string */ protected $signature = 'package:discover'; /** * The console command description. * * @var string */ protected $description = 'Rebuild the cached package manifest'; /** * Execute the console command. * * @param \Illuminate\Foundation\PackageManifest $manifest * @return void */ public function handle(PackageManifest $manifest) { $manifest->build(); foreach (array_keys($manifest->manifest) as $package) { $this->line("Discovered Package: <info>{$package}</info>"); } $this->info('Package manifest generated successfully.'); } }
看第一句代码吧
public function build() { $packages = []; //没错，就是得到composer安装时生成的安装包记录 if ($this->files->exists($path = $this->vendorPath.'/composer/installed.json')) { $packages = json_decode($this->files->get($path), true); } $ignoreAll = in_array('*', $ignore = $this->packagesToIgnore()); $this->write(collect($packages)->mapWithKeys(function ($package) { return [$this->format($package['name']) => $package['extra']['laravel'] ?? []]; })->each(function ($configuration) use (&$ignore) { $ignore = array_merge($ignore, $configuration['dont-discover'] ?? []); })->reject(function ($configuration, $package) use ($ignore, $ignoreAll) { return $ignoreAll || in_array($package, $ignore); })->filter()->all()); }
然后写入指定的文件
protected function write(array $manifest) { if (! is_writable(dirname($this->manifestPath))) { throw new Exception('The '.dirname($this->manifestPath).' directory must be present and writable.'); } $this->files->replace( $this->manifestPath, '<?php return '.var_export($manifest, true).';' ); }
写入哪个文件呢？【跟console的运行流程有关，具体可以看前面5.5版本的注解，我不想再重复了】
bootstrap/cache/packages.php 就写入这文件，我怎么知道【你还是得看5.5LTS的注解哦】这个命令的功能就这样
后面的2个命令不用分析了，这么简单的道理
下面我们去看看laravel/framework的加载，因为它是一个扩展包，也有自己的composer.json文件
composer也会去读取它的文件然后加载的【其它扩展包道理一样】下面来看的composer.json文件吧
{ "name": "laravel/framework", "description": "The Laravel Framework.", "keywords": ["framework", "laravel"], "license": "MIT", "homepage": "https://laravel.com", "support": { "issues": "https://github.com/laravel/framework/issues", "source": "https://github.com/laravel/framework" }, "authors": [ { "name": "Taylor Otwell", "email": "[email protected]" } ], "require": { "php": "^7.1.3", "ext-json": "*", "ext-mbstring": "*", "ext-openssl": "*", "doctrine/inflector": "^1.1", "dragonmantank/cron-expression": "^2.0", "egulias/email-validator": "^2.0", "erusev/parsedown": "^1.7", "league/flysystem": "^1.0.8", "monolog/monolog": "^1.12", "nesbot/carbon": "^1.26.3 || ^2.0", "opis/closure": "^3.1", "psr/container": "^1.0", "psr/simple-cache": "^1.0", "ramsey/uuid": "^3.7", "swiftmailer/swiftmailer": "^6.0", "symfony/console": "^4.2", "symfony/debug": "^4.2", "symfony/finder": "^4.2", "symfony/http-foundation": "^4.2", "symfony/http-kernel": "^4.2", "symfony/process": "^4.2", "symfony/routing": "^4.2", "symfony/var-dumper": "^4.2", "tijsverkoyen/css-to-inline-styles": "^2.2.1", "vlucas/phpdotenv": "^3.3" }, "replace": { "illuminate/auth": "self.version", "illuminate/broadcasting": "self.version", "illuminate/bus": "self.version", "illuminate/cache": "self.version", "illuminate/config": "self.version", "illuminate/console": "self.version", "illuminate/container": "self.version", "illuminate/contracts": "self.version", "illuminate/cookie": "self.version", "illuminate/database": "self.version", "illuminate/encryption": "self.version", "illuminate/events": "self.version", "illuminate/filesystem": "self.version", "illuminate/hashing": "self.version", "illuminate/http": "self.version", "illuminate/log": "self.version", "illuminate/mail": "self.version", "illuminate/notifications": "self.version", "illuminate/pagination": "self.version", "illuminate/pipeline": "self.version", "illuminate/queue": "self.version", "illuminate/redis": "self.version", "illuminate/routing": "self.version", "illuminate/session": "self.version", "illuminate/support": "self.version", "illuminate/translation": "self.version", "illuminate/validation": "self.version", "illuminate/view": "self.version" }, "conflict": { "tightenco/collect": "<5.5.33" }, "require-dev": { "aws/aws-sdk-php": "^3.0", "doctrine/dbal": "^2.6", "filp/whoops": "^2.1.4", "guzzlehttp/guzzle": "^6.3", "league/flysystem-cached-adapter": "^1.0", "mockery/mockery": "^1.0", "moontoast/math": "^1.1", "orchestra/testbench-core": "3.8.*", "pda/pheanstalk": "^4.0", "phpunit/phpunit": "^7.5|^8.0", "predis/predis": "^1.1.1", "symfony/css-selector": "^4.2", "symfony/dom-crawler": "^4.2", "true/punycode": "^2.1" }, "autoload": { "files": [ "src/Illuminate/Foundation/helpers.php",//你经常用的函数包文件 "src/Illuminate/Support/helpers.php" ], "psr-4": { "Illuminate\\": "src/Illuminate/"//命名空间对应的根目录 } }, "autoload-dev": { "files": [ "tests/Database/stubs/MigrationCreatorFakeMigration.php" ], "psr-4": { "Illuminate\\Tests\\": "tests/" } }, "extra": { "branch-alias": { "dev-master": "5.8-dev" } }, "suggest": { "ext-pcntl": "Required to use all features of the queue worker.", "ext-posix": "Required to use all features of the queue worker.", "aws/aws-sdk-php": "Required to use the SQS queue driver and SES mail driver (^3.0).", "doctrine/dbal": "Required to rename columns and drop SQLite columns (^2.6).", "filp/whoops": "Required for friendly error pages in development (^2.1.4).", "fzaninotto/faker": "Required to use the eloquent factory builder (^1.4).", "guzzlehttp/guzzle": "Required to use the Mailgun and Mandrill mail drivers and the ping methods on schedules (^6.0).", "laravel/tinker": "Required to use the tinker console command (^1.0).", "league/flysystem-aws-s3-v3": "Required to use the Flysystem S3 driver (^1.0).", "league/flysystem-cached-adapter": "Required to use the Flysystem cache (^1.0).", "league/flysystem-rackspace": "Required to use the Flysystem Rackspace driver (^1.0).", "league/flysystem-sftp": "Required to use the Flysystem SFTP driver (^1.0).", "moontoast/math": "Required to use ordered UUIDs (^1.1).", "nexmo/client": "Required to use the Nexmo transport (^1.0).", "pda/pheanstalk": "Required to use the beanstalk queue driver (^4.0).", "predis/predis": "Required to use the redis cache and queue drivers (^1.0).", "pusher/pusher-php-server": "Required to use the Pusher broadcast driver (^3.0).", "symfony/css-selector": "Required to use some of the crawler integration testing tools (^4.2).", "symfony/dom-crawler": "Required to use most of the crawler integration testing tools (^4.2).", "symfony/psr-http-message-bridge": "Required to use PSR-7 bridging features (^1.1).", "wildbit/swiftmailer-postmark": "Required to use Postmark mail driver (^3.0)." }, "config": { "sort-packages": true }, "minimum-stability": "dev", "prefer-stable": true }根据这配置文件大家也应该知道了，它会去下载它的require指定的依赖扩展包，它的依赖扩展包 同样也是依赖其它的扩展包
根命名空间对应的目录结构
"psr-4": { "Illuminate\\": "src/Illuminate/"//命名空间对应的根目录 }
下面是它的子目录【自然对应子命名空间】
其它的扩展包下载原理也是这样【相当于递归下载】
