作曲家使用宅基地給出錯誤安裝「你的要求不能被解析到一個安裝包集合」

Question

我嘗試使用下面的命令來安裝我的作曲家的包：

composer install --no-dev --no-scripts 

的composer.json文件看起來像這樣（這是非常相似的標準Laravel作曲文件）：

{ 
    "name": "laravel/laravel", 
    "description": "The Laravel Framework.", 
    "keywords": ["framework", "laravel"], 
    "license": "MIT", 
    "type": "project", 
    "require": { 
     "php": ">=5.5.9", 
     "laravel/framework": "5.2.*", 
     "doctrine/dbal": "^2.5", 
    }, 
    "require-dev": { 
     "fzaninotto/faker": "~1.4", 
     "mockery/mockery": "0.9.*", 
     "phpunit/phpunit": "~4.0", 
     "symfony/css-selector": "2.8.*|3.0.*", 
     "symfony/dom-crawler": "2.8.*|3.0.*", 
     "laravel/homestead": "^5.2", 
     "barryvdh/laravel-ide-helper": "^2.3" 
    }, 
    "autoload": { 
     "classmap": [ 
      "database" 
     ], 
     "psr-4": { 
      "App\\": "app/" 
     } 
    }, 
    "autoload-dev": { 
     "classmap": [ 
      "tests/TestCase.php" 
     ] 
    }, 
    "scripts": { 
     "post-root-package-install": [ 
      "php -r \"copy('.env.example', '.env');\"" 
     ], 
     "post-create-project-cmd": [ 
      "php artisan key:generate" 
     ], 
     "post-install-cmd": [ 
      "Illuminate\\Foundation\\ComposerScripts::postInstall", 
      "php artisan optimize" 
     ], 
     "post-update-cmd": [ 
      "Illuminate\\Foundation\\ComposerScripts::postUpdate", 
      "php artisan optimize" 
     ] 
    }, 
    "config": { 
     "preferred-install": "dist" 
    } 
} 

然而，當我嘗試我的生產機器（運行PHP上v5.5.9我收到以下錯誤版本上安裝它：

您的需求無法解析爲可安裝的一組軟件包。

Problem 1 
    - laravel/homestead v5.4.0 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - laravel/homestead v5.3.2 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - laravel/homestead v5.3.1 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - laravel/homestead v5.3.0 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - laravel/homestead v5.2.4 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - laravel/homestead v5.2.1 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - laravel/homestead v5.2.0 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - laravel/homestead 5.2.3 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - laravel/homestead 5.2.2 requires php ^5.6 || ^7.0 -> your PHP version (5.5.9) does not satisfy that requirement. 
    - Installation request for laravel/homestead ^5.2 -> satisfiable by laravel/homestead[5.2.2, 5.2.3, v5.2.0, v5.2.1, v5.2.4, v5.3.0, v5.3.1, v5.3.2, v5.4.0]. 

所以我的問題是：

• 爲什麼甚至被安裝宅基地時，我說--no-dev和宅基地是一個開發包？
• 如果我確實想在我的生產機器上安裝Homestead，我該如何解決上述問題？

Answer 1

--no-dev不應該安裝dev依賴項。檢查你的生產構建腳本（或者你用來在生產環境中運行的腳本），確實增加了--no-dev。

對於您的問題的第二部分，您可以通過將laravel/homestead程序包版本更改爲~4.0或4.0.5以更準確地使其與您的php版本兼容來避免該錯誤。