listing-1.sh

$ php composer.phar show symfony/locale
name     : symfony/locale
versions : 2.0.4, 2.0.5, 2.0.6, 2.0.7, 2.1.0-dev
type     : library
names    : symfony/locale
source   : [git] http://github.com/symfony/Locale.git a484e15b2870dc67041948e7a02e0e8ba617af39
dist     : [zip] http://github.com/symfony/Locale/zipball/a484e15b2870dc67041948e7a02e0e8ba617af39 a484e15b2870dc67041948e7a02e0e8ba617af39
licence  : MIT

autoload
psr-0
Symfony\Component\Locale : .

requires
php >=5.3.2

listing-2.sh

$ php composer.phar search symfony
available: symfony/symfony 2.0.4
available: symfony/symfony 2.0.5
available: symfony/symfony 2.0.6
available: symfony/symfony 2.0.7
available: symfony/symfony 2.1.0-dev
available: symfony/twig-bridge 2.0.4
available: symfony/twig-bridge 2.0.5
available: symfony/twig-bridge 2.0.6
available: symfony/twig-bridge 2.0.7
available: symfony/twig-bridge 2.1.0-dev
...

listing-3.yml

{
    "repositories": {
        "my-repo": {
            "composer": {
                "url": "http://example.org"
            }
        }
    },
    "require": {
        "kriswallsmith/buzz": ">=0.5",
        "symfony/css-selector": ">2.0.4",
        "symfony/dom-crawler": ">2.0.4",
        "my-company/my-library": "=1.0.1"
    }
}

listing-4.yml

{
    "repositories": {
        "my-repo": {
            "vcs": {
                "url": "git://example.org/my-library.git"
            }
        }
    },
    "require": {
        "kriswallsmith/buzz": ">=0.5",
        "symfony/css-selector": ">2.0.4",
        "symfony/dom-crawler": ">2.0.4",
        "my-company/my-library": "=1.0.1"
    }
}

listing-5.yml

{
    "repositories": {
        "my-repo": {
            "package": {
                "name": "my-company/my-library",
                "version": "1.0.0",
                "dist": {
                    "url": "http://example.org/package-1.0.0.zip",
                    "type": "zip"
                },
                "source": {
                    "url": "git://example.org/package.git",
                    "type": "git",
                    "reference": "1.0.0"
                }
            }
        }
    },
    "require": {
        "kriswallsmith/buzz": ">=0.5",
        "symfony/css-selector": ">2.0.4",
        "symfony/dom-crawler": ">2.0.4",
        "my-company/my-library": "=1.0.1"
    }
}

listing-6.yml

{
    "repositories": {
        "pear.php.net": {
            "pear": {
                "url": "http://pear.php.net"
            }
        },
    },
    "require": {
        "kriswallsmith/buzz": ">=0.5",
        "symfony/css-selector": ">2.0.4",
        "symfony/dom-crawler": ">2.0.4",
        "Net_DNS": "=1.0.7"
    }
}

listing-7.yml

{
    require: {
        "symfony/class-loader": "2.0.7"
    }
}

listing-8.php

<?php

require_once __DIR__.'/vendor/symfony/class-loader/Symfony/Component/ClassLoader/UniversalClassLoader.php';

use Symfony\Component\ClassLoader\UniversalClassLoader;

$loader = new UniversalClassLoader();
$loader->register();

$loader->registerNamespaces(array(
    'Buzz'                            => __DIR__.'/vendor/kriswallsmith/buzz/lib',
    'Symfony\\Component\\ClassLoader' => __DIR__.'/vendor/symfony/class-loader',
    'Symfony\\Component\\CssSelector' => __DIR__.'/vendor/symfony/css-selector',
    'Symfony\\Component\\DomCrawler'  => __DIR__.'/vendor/symfony/dom-crawler',
));

$loader->registerPrefixes(array(
    'Net_' => __DIR__.'/vendor/Net_DNS'
));