import { type SpawnOptionsWithoutStdio } from 'node:child_process';
import { Observable } from 'rxjs';
export type Output = {
    type: 'err' | 'out';
    output: Uint8Array;
};
export type OutputEvent = {
    type: 'output';
    output: Output;
};
export type ErrorEvent = {
    type: 'error';
    error: Error;
};
export type CompletedEvent = {
    type: 'complete';
};
export type SpawnEvent = OutputEvent | ErrorEvent | CompletedEvent;
export type SpawnState = {
    output: Output[];
    error: Error | SpawnError | undefined;
    completed: boolean;
};
export declare class SpawnError extends Error {
    readonly exitCode: number;
    constructor(message: string, exitCode: number);
}
export declare const INITIAL_SPAWN_STATE: SpawnState;
export declare function ospawn(command: string, args: readonly string[], options?: SpawnOptionsWithoutStdio): Observable<{
    completed: boolean;
    output: Output[];
    error: Error | SpawnError | undefined;
}>;
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