sh：symfony-cmd：找不到命令

Question

我已将 Symfony 5.2 应用程序模板降级为使用 Symfony 4.4，以便允许使用一些需要旧版本 Symfony 的库。问题是，当我这样做时composer install，我在安装即将结束时收到此错误：

sh：symfony-cmd：找不到命令

看来安装大部分成功，因为我的vendor文件夹已创建并填充。但我担心这个错误。

这个错误是什么意思？我如何解决它？

====

编辑：这是我的composer.json文件：

{
    "type": "project",
    "license": "proprietary",
    "minimum-stability": "dev",
    "prefer-stable": true,
    "require": {
        "php": ">=7.4.0",
        "ext-ctype": "*",
        "ext-iconv": "*",
        "ext-json": "*",
        "composer/package-versions-deprecated": "1.11.99.1",
        "cweagans/composer-patches": "^1.7",
        "doctrine/doctrine-bundle": "^2.4",
        "doctrine/doctrine-migrations-bundle": "^3.1",
        "doctrine/orm": "^2.9",
        "phpdocumentor/reflection-docblock": "*",
        "sensio/framework-extra-bundle": "*",
        "symfony/framework-bundle": "4.4.*",
        "symfony/http-client": "*",
        "symfony/intl": "*",
        "symfony/mailer": "*",
        "symfony/mime": "*",
        "symfony/monolog-bundle": "^3.1",
        "symfony/notifier": "*",
        "symfony/process": "*",
        "symfony/property-access": "*",
        "symfony/property-info": "*",
        "symfony/proxy-manager-bridge": "*",
        "symfony/security-bundle": "*",
        "symfony/serializer": "*",
        "symfony/string": "*",
        "symfony/translation": "*",
        "symfony/twig-bundle": "*",
        "symfony/validator": "*",
        "symfony/web-link": "*",
        "symfony/yaml": "*",
        "twig/extra-bundle": "*",
        "twig/twig": "*"
    },
    "require-dev": {
        "doctrine/doctrine-fixtures-bundle": "^3.4",
        "roave/security-advisories": "dev-master",
        "symfony/browser-kit": "*",
        "symfony/css-selector": "*",
        "symfony/debug-bundle": "*",
        "symfony/maker-bundle": "*",
        "symfony/phpunit-bridge": "*",
        "symfony/stopwatch": "*",
        "symfony/var-dumper": "*",
        "symfony/web-profiler-bundle": "*",
        "vimeo/psalm": "^4.9"
    },
    "config": {
        "optimize-autoloader": true,
        "preferred-install": {
            "*": "dist"
        },
        "sort-packages": true
    },
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "App\\Tests\\": "tests/"
        }
    },
    "replace": {
        "symfony/polyfill-ctype": "*",
        "symfony/polyfill-iconv": "*",
        "symfony/polyfill-php72": "*"
    },
    "scripts": {
        "auto-scripts": {
            "cache:clear": "symfony-cmd",
            "assets:install %PUBLIC_DIR%": "symfony-cmd"
        },
        "post-install-cmd": [
            "@auto-scripts"
        ],
        "post-update-cmd": [
            "@auto-scripts"
        ]
    },
    "conflict": {
        "symfony/symfony": "*"
    },
    "extra": {
        "symfony": {
            "allow-contrib": false,
            "require": "5.2.*"
        },
        "patches": {
            "symfony/maker-bundle": {
                "Provide flag to force annotation in make entity command": "https://raw.githubusercontent.com/vklux/maker-bundle-force-annotation/master/maker-force-annotation-flag.patch"
            }
        }
    }
}

Answer 1

对于那些symfony/flex安装了该软件包但仍然收到错误的人，请确保symfony/flex在运行 Composer 时允许该软件包执行代码。

这是因为自 Composer 2.2.0 起，该allow-plugins选项添加了一层安全性，允许您限制哪些 Composer 插件可以在启动时执行代码。

因此，请确保文件allow-plugins中的配置中有适当的行composer.json

"config": { 
    // other config...

    "allow-plugins": {
        "symfony/flex": true
    }
},

Answer 2

symfony-cmd是 Symfony Flex 的一部分。您的系统composer.json不包含对 Flex 的任何要求，因此运行composer require symfony/flex 可能会解决该问题。

Answer 3

虽然将 symfony/flex 添加到项目中是一种解决方案，但请记住 Flex 是可选的。如果您想在不安装 Flex 的情况下消除错误，只需从您的composer.json 中删除 symfony-cmd 命令引用即可。

前：

    "scripts": {
        "auto-scripts": {
            "cache:clear": "symfony-cmd",
            "assets:install %PUBLIC_DIR%": "symfony-cmd"
        },
        "post-install-cmd": [
            "@auto-scripts"
        ],
        "post-update-cmd": [
            "@auto-scripts"
        ]
    },

后：

    "scripts": {
        "auto-scripts": {},
        "post-install-cmd": [],
        "post-update-cmd": []
    },