connection.php

<?php

return [
    'driver' => env('CONNECTION_DB_DRIVER', 'mysql'),
    'host' => env('CONNECTION_DB_HOST', env('DB_HOST', '127.0.0.1')),
    'port' => env('CONNECTION_DB_PORT', env('DB_PORT', '3306')),
    'database' => env('CONNECTION_DB_DATABASE', env('DB_DATABASE', 'forge')),
    'username' => env('CONNECTION_DB_USERNAME', env('DB_USERNAME', 'forge')),
    'password' => env('CONNECTION_DB_PASSWORD', env('DB_PASSWORD', '')),
    'unix_socket' => env('CONNECTION_DB_SOCKET', env('DB_SOCKET', '')),
    'charset' => 'latin1',
    'collation' => 'latin1_swedish_ci',
    'prefix' => '',
    'strict' => false,
    'engine' => null,
];

ConnectionServiceProvider.php

<?php

namespace Mithrandir\Providers;

class ConnectionServiceProvider extends MithrandirServiceProvider
{
    protected $connectionName = 'connection';
}

MithrandirServiceProvider.php

<?php

namespace Mithrandir\Providers;

use Illuminate\Support\ServiceProvider;

class MithrandirServiceProvider extends ServiceProvider
{
    protected $connectionName;

    public function boot()
    {
        $this->loadMigrationsFrom($this->migrationPath());
    }

    public function register()
    {
        $this->mergeConfigFrom($this->configPath(), $this->configKey());
    }

    protected function migrationPath()
    {
        return dirname(__FILE__)."/../../database/migrations/{$this->connectionName}";
    }

    protected function configPath()
    {
        return dirname(__FILE__)."/../../config/{$this->connectionName}.php";
    }

    protected function configKey($prefix = 'database.connections')
    {
        return "{$prefix}.{$this->connectionName}";
    }
}