Upgrade Symfony2 2.3 to 2.4: Change composer.json

Question

I want to upgrade a project from Symfony 2.3 to 2.4. I've readed that the 2.4 version has backward compatibility with 2.3 and is only necessary to update de components version.

This is my composer.json:

{
    "name" : "symfony/framework-standard-edition",
    "description" : "The \"Symfony Standard Edition\" distribution",
    "type" : "project",
    "license" : [
            "MIT"
    ],
    "require" : {
            "symfony/symfony" : "2.3.*",
            "doctrine/doctrine-fixtures-bundle" : "dev-master",
            "symfony/swiftmailer-bundle" : "2.3.*",
            "doctrine/orm" : ">=2.2.3,<2.4-dev",
            "doctrine/data-fixtures" : "dev-master",
            "symfony/assetic-bundle" : "2.3.*",
            "incenteev/composer-parameter-handler" : "~2.0",
            "twig/extensions" : "1.0.*",
            "php" : ">=5.3.3",
            "sensio/generator-bundle" : "2.3.*",
            "symfony/monolog-bundle" : "2.4.*",
            "sensio/framework-extra-bundle" : "2.3.*",
            "doctrine/doctrine-bundle" : "1.2.*",
            "sensio/distribution-bundle" : "2.3.*",
            "liip/imagine-bundle": "dev-master",
            "egeloen/google-map-bundle": "*"
    },
    "autoload" : {
            "psr-0" : {
                    "" : "src/"
            }
    },
    "minimum-stability" : "stable",
    "config" : {
            "bin-dir" : "bin"
    },
    "scripts" : {
            "post-update-cmd" : [
                    "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
                    "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
                    "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
                    "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
                    "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
            ],
            "post-install-cmd" : [
                    "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
                    "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
                    "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
                    "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
                    "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
            ]
    },
    "extra" : {
            "branch-alias" : {
                    "dev-master" : "2.3-dev"
            },
            "symfony-web-dir" : "web",
            "symfony-app-dir" : "app",
            "incenteev-parameters" : {
                    "file" : "app/config/parameters.yml"
            }
    }
}

But when I check the v2.4 composer.json file is very different from this.

I've tried to change my composer.json for the 2.4 version, add my custom bundles and make a "composer update", but it didn't work.

Would it be enough to update the versions of the bundles that installs the 2.4 version on my own composer.json?

Thanks.

Answer 1

You're looking at the wrong composer.json. Try this one: https://github.com/symfony/symfony-standard/blob/2.4/composer.json

Explanation: The symfony/symfony repository is the framework itself -- but you do not want to clone the framework, only depend on it. That's why you'd rather use the symfony/symfony-standard repository, which is basically a template for projects that rely on the Symfony framework. As is yours.

Answer 2

The new Symfony 2.4 composer.json file is next:

{
    "name": "symfony/framework-standard-edition",
    "license": "MIT",
    "type": "project",
    "description": "The \"Symfony Standard Edition\" distribution",
    "autoload": {
        "psr-0": { "": "src/" }
    },
    "require": {
        "php": ">=5.3.3",
        "symfony/symfony": "~2.4",
        "doctrine/orm": "~2.2,>=2.2.3",
        "doctrine/doctrine-bundle": "~1.2",
        "twig/extensions": "~1.0",
        "symfony/assetic-bundle": "~2.3",
        "symfony/swiftmailer-bundle": "~2.3",
        "symfony/monolog-bundle": "~2.4",
        "sensio/distribution-bundle": "~2.3",
        "sensio/framework-extra-bundle": "~2.3",
        "sensio/generator-bundle": "~2.3",
        "incenteev/composer-parameter-handler": "~2.0"
    },
    "scripts": {
        "post-install-cmd": [
            "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
        ],
        "post-update-cmd": [
            "Incenteev\\ParameterHandler\\ScriptHandler::buildParameters",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installRequirementsFile"
        ]
    },
    "config": {
        "bin-dir": "bin"
    },
    "minimum-stability": "beta",
    "extra": {
        "symfony-app-dir": "app",
        "symfony-web-dir": "web",
        "incenteev-parameters": {
            "file": "app/config/parameters.yml"
        },
        "branch-alias": {
            "dev-master": "2.4-dev"
        }
    }
}

Compare the third-party libraries in require section that You have used in your project with third-party libraries in v 2.4. If you don't use any missed libs in new version, you can update. But create a backup before.