Generate composer.json

gistfile1.json

{
    "name": "bundle/mybundle",
    "autoload": {
        "psr-0": { "": "src/" }
    },
    "require": {
        "php": ">=5.3.2",
        "symfony/symfony": "2.1.*",
        "doctrine/orm": "2.2.*",
        "doctrine/doctrine-bundle": "*",
        "twig/extensions": "*",
        "symfony/assetic-bundle": "*",
        "symfony/swiftmailer-bundle": "*",
        "symfony/monolog-bundle": "*",
        "sensio/distribution-bundle": "*",
        "sensio/generator-bundle": "*",
        "jms/security-extra-bundle": "*",
        "jms/debugging-bundle": "*",

        "knp/JohnFooBundle": "*",
        "knp/JackFooBundle": "*",
        "behat/behat-bundle": "*"
    },

    "repositories": [
        
    ],

    "scripts": {
        "post-install-cmd": [
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets"
        ],
        "post-update-cmd": [
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::buildBootstrap",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::clearCache",
            "Sensio\\Bundle\\DistributionBundle\\Composer\\ScriptHandler::installAssets"
        ]
    },
    "config": {
        "bin-dir": "bin"
    },
    "extra": {
        "symfony-app-dir": "app",
        "symfony-web-dir": "web",
        "symfony-assets-install": "symlink"
    }
}