GitHubDriver: stricter URL validation to avoid issues with undefined index owner

[glaubinix]

Example composer.json

{
    "repositories": [
        {"type": "vcs", "url":  "https://github.com/php-fig/log/releases"}
    ],
    "require": {
        "psr/log": "^3.0"
    }
}

composer update output with current stable:

composer update -vvv
Running 2.3.10 (2022-07-13 15:48:23) with PHP 8.1.8 on Darwin / 21.5.0
Reading ./composer.json (/tmp/update-error/composer.json)
Loading config file /Users/glaubinix/.composer/config.json
Loading config file /Users/glaubinix/.composer/auth.json
Loading config file ./composer.json (/tmp/update-error/composer.json)
Checked CA file /usr/local/etc/ca-certificates/cert.pem: valid
Executing command (/tmp/update-error): 'git' 'branch' '-a' '--no-color' '--no-abbrev' '-v'
Reading /Users/glaubinix/.composer/composer.json
Loading config file /Users/glaubinix/.composer/config.json
Loading config file /Users/glaubinix/.composer/auth.json
Loading config file /Users/glaubinix/.composer/composer.json (/Users/glaubinix/.composer/composer.json)
Loading config file /Users/glaubinix/.composer/auth.json
Reading /Users/glaubinix/.composer/auth.json
Reading ./composer.lock (/tmp/update-error/composer.lock)
Reading /Users/glaubinix/.composer/vendor/composer/installed.json
Loading composer repositories with package information
Using GitHub token authentication
Downloading https://api.github.com/repos/php-fig/log/releases
[200] https://api.github.com/repos/php-fig/log/releases

In GitHubDriver.php line 561:

  [ErrorException]
  Undefined array key "owner"


Exception trace:
  at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Repository/Vcs/GitHubDriver.php:561
 Composer\Util\ErrorHandler::handle() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Repository/Vcs/GitHubDriver.php:561
 Composer\Repository\Vcs\GitHubDriver->fetchRootIdentifier() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Repository/Vcs/GitHubDriver.php:81
 Composer\Repository\Vcs\GitHubDriver->initialize() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Repository/VcsRepository.php:149
 Composer\Repository\VcsRepository->getDriver() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Repository/VcsRepository.php:198
 Composer\Repository\VcsRepository->initialize() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Repository/ArrayRepository.php:311
 Composer\Repository\ArrayRepository->getPackages() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Repository/ArrayRepository.php:62
 Composer\Repository\ArrayRepository->loadPackages() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/DependencyResolver/PoolBuilder.php:391
 Composer\DependencyResolver\PoolBuilder->loadPackagesMarkedForLoading() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/DependencyResolver/PoolBuilder.php:240
 Composer\DependencyResolver\PoolBuilder->buildPool() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Repository/RepositorySet.php:334
 Composer\Repository\RepositorySet->createPool() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Installer.php:473
 Composer\Installer->doUpdate() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Installer.php:289
 Composer\Installer->run() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Command/UpdateCommand.php:243
 Composer\Command\UpdateCommand->execute() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/vendor/symfony/console/Command/Command.php:298
 Symfony\Component\Console\Command\Command->run() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/vendor/symfony/console/Application.php:1024
 Symfony\Component\Console\Application->doRunCommand() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/vendor/symfony/console/Application.php:299
 Symfony\Component\Console\Application->doRun() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Console/Application.php:343
 Composer\Console\Application->doRun() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/vendor/symfony/console/Application.php:171
 Symfony\Component\Console\Application->run() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/src/Composer/Console/Application.php:138
 Composer\Console\Application->run() at phar:///usr/local/Cellar/composer/2.3.10/bin/composer/bin/composer:88
 require() at /usr/local/Cellar/composer/2.3.10/bin/composer:30

update [--with WITH] [--prefer-source] [--prefer-dist] [--prefer-install PREFER-INSTALL] [--dry-run] [--dev] [--no-dev] [--lock] [--no-install] [--no-audit] [--audit-format AUDIT-FORMAT] [--no-autoloader] [--no-suggest] [--no-progress] [-w|--with-dependencies] [-W|--with-all-dependencies] [-v|vv|vvv|--verbose] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--apcu-autoloader-prefix APCU-AUTOLOADER-PREFIX] [--ignore-platform-req IGNORE-PLATFORM-REQ] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [-i|--interactive] [--root-reqs] [--] [<packages>...]