/** What a worker reads to find its job; each entry: [new name, old name]. */
export declare const JOB_ENV: {
    readonly id: readonly ["ROOST_JOB_ID", "PI_JOB_ID"];
    readonly token: readonly ["ROOST_JOB_TOKEN", "PI_JOB_TOKEN"];
    readonly socket: readonly ["ROOST_SOCKET", "PI_DAEMON_SOCK"];
    readonly dir: readonly ["ROOST_JOB_DIR", "PI_JOB_DIR"];
};
/** Every name that makes a process a job's worker: never inherited by another job. */
export declare const JOB_ENV_NAMES: readonly string[];
/** The environment a job's worker starts with: both names of each. */
export declare function jobEnv(o: {
    id: string;
    token?: string;
    socket: string;
    dir: string;
}): Record<string, string>;
/** The first set name of a JOB_ENV entry. */
export declare function readJobEnv(env: NodeJS.ProcessEnv, which: keyof typeof JOB_ENV): string | undefined;
/** A roost setting from the environment: ROOST_<name>, else PI_ROOST_<name>. */
export declare function roostEnv(name: string, env?: NodeJS.ProcessEnv): string | undefined;