Function registerAs

registerAs<TKey extends string, TEnv, TConfig extends object>(
namespace: TKey,
factory: (env: TEnv) => TConfig,
): ConfigNamespace<TKey, TEnv, TConfig>

Create a namespaced configuration factory Similar to NestJS registerAs

Type Parameters

TKey extends string
TEnv
TConfig extends object

Parameters

namespace: TKey
Configuration namespace (e.g., 'database', 'email')
factory: (env: TEnv) => TConfig
Factory function receiving env and returning config object

Returns ConfigNamespace<TKey, TEnv, TConfig>

ConfigNamespace with token, factory, and asProvider() method

Example

// apps/backend/src/config/database.config.ts
export const databaseConfig = registerAs('database', (env: Env) => ({
  url: env.DATABASE_URL,
  maxConnections: parseInt(env.DATABASE_MAX_CONNECTIONS || '10'),
}))

// Auto-generates: databaseConfig.KEY = Symbol('CONFIG:database')

// Usage in module:
// Option 1: Manual provider
{
  provide: databaseConfig.KEY,
  useFactory: databaseConfig.factory,
  inject: [DI_TOKENS.CloudflareEnv]
}

// Option 2: asProvider() helper
databaseConfig.asProvider()
// Returns: { provide: databaseConfig.KEY, useFactory: ..., inject: [DI_TOKENS.CloudflareEnv] }