使用 Homestead 安装 Composer 时出现错误 "Your requirements could not be resolved to an installable set of packages"

Question

我正在尝试使用以下命令安装我的作曲家包：

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

composer.json 文件看起来像这样（它与标准 Laravel 作曲家文件非常相似）：

{
    "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，当我尝试在我的生产机器上安装它时（它在版本 v5.5.9 上运行 PHP，我收到以下错误：

无法将您的要求解析为一组可安装的软件包。

  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].

所以我的问题如下：

当我说 --no-dev 并且 homestead 是一个开发包时，为什么还要安装 homestead？
如果我确实想在我的生产机器上安装 Homestead，我该如何解决上述问题？

Answer 1

--no-dev 不应安装开发依赖项。检查您的生产构建脚本（或您在生产中用于运行的任何内容），确实添加了 --no-dev。

对于问题的第二部分，您可以通过将 laravel/homestead 软件包版本更改为 ~4.0 或 4.0.5 来避免错误，以使其与您的 php版本。

使用 Homestead 安装 Composer 时出现错误 "Your requirements could not be resolved to an installable set of packages"

Composer install using Homestead gives error "Your requirements could not be resolved to an installable set of packages"

laravel

composer-php

homestead