Laravel5.2 Heroku部署未能安装系统软件包

Question

我正在尝试将Laravel5.2项目部署到heroku，但我得到了以下错误

-----> PHP app detected
-----> Bootstrapping...
-----> Installing platform packages...
!     ERROR: Failed to install system packages.

   Your platform requirements (for runtimes and extensions) could
   not be resolved to an installable set of dependencies, or a
   repository was unreachable.

   Full error information from installation attempt:

   > Loading repositories with available runtimes and extensions
   > 
   > Warning: The lock file is not up to date with the latest changes in composer.json. You may be getting outdated dependencies. Run update to update them.
   > Nothing to install or update
   > Generating autoload files

   Please verify that all requirements for runtime versions in
   'composer.lock' are compatible with the list below, and ensure
   all required extensions are available for the desired runtimes.

   For reference, the following runtimes are currently available:

   PHP:  7.1.10, 7.1.9, 7.1.8, 7.1.3, 7.1.2, 7.1.1, 7.0.24, 
   7.0.23, 7.0.22, 7.0.17, 7.0.16, 7.0.15, 5.6.31, 5.6.30, 
   5.5.38
   HHVM: 3.5.1

   For a list of supported runtimes & extensions on Heroku, please
   refer to: https://devcenter.heroku.com/articles/php-support
!     Push rejected, failed to compile PHP app.
!     Push failed

这是我的composer.json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.*",
        "barryvdh/laravel-ide-helper": "^2.1",
        "components/jquery": "2.1.4",
        "components/jqueryui": "1.11.4",
        "kodeine/laravel-acl": "^0.1.3",
        "laravelcollective/html": "5.2.*"
    },
    "require-dev": {
        "symfony/dom-crawler": "~3.0",
        "symfony/css-selector": "~3.0",
        "fzaninotto/faker": "~1.4",
        "mockery/mockery": "0.9.*",
        "phpunit/phpunit": "~4.0",
        "phpspec/phpspec": "~2.1"
    },
    "autoload": {
        "classmap": [
            "database"
        ],
        "psr-4": {
            "App\\": "app/"
        }
    },
    "autoload-dev": {
        "classmap": [
            "tests/TestCase.php"
        ]
    },
    "scripts": {
        "post-install-cmd": [
            "php artisan clear-compiled",
            "php artisan optimize"
        ],
        "pre-update-cmd": [
            "php artisan clear-compiled"
        ],
        "post-update-cmd": [
            "php artisan optimize"
        ],
        "post-root-package-install": [
            "php -r \"copy('.env.example', '.env');\""
        ],
        "post-create-project-cmd": [
            "php artisan key:generate"
        ]
    },
    "config": {
        "preferred-install": "dist"
    }
}

在使用composer安装、composer更新、composer更新-lock之后，我已经尝试了几十次部署，我甚至删除了composer.lock文件并再次运行了composer更新，但是这个错误不会发生。请帮帮我！

Answer 1

结果发现，我的供应商文件夹没有在.gitignore文件中列出，而是与heroku上的其他文件一起推送的。一旦我将供应商文件夹添加到.gitignore中，一切都开始无缝地工作。