Function resolveDbUrl

packages/db/connection-url.ts:7–12

(
  base: 'DATABASE_URL' | 'DATABASE_REPLICA_URL',
  role: string
)

 * env alone; unset keyed vars preserve the prior single-URL behavior.
 */
export function resolveDbUrl(
  base: 'DATABASE_URL' | 'DATABASE_REPLICA_URL',
  role: string
): string | undefined {
  return process.env[`${base}_${role.toUpperCase()}`] ?? process.env[base]
}