import type { GitHubAccessor } from '../../accessor/github.ts';
import type { PathSpec, WalkEntry } from '../../types.ts';
import type { DeltaHook } from '../../watch/base.ts';
/**
 * One recursive git tree fetch feeding the generic listing differ.
 *
 * `GET /git/trees/{ref}?recursive=1` returns every path in the repository with
 * its object sha, so a pull is one request whatever the repository's shape, and
 * the fingerprint is the sha itself. That is the strongest fingerprint any
 * mirage backend has: git is content-addressed, so identical bytes have an
 * identical sha and a rewrite that changes nothing correctly reports nothing.
 *
 * A mount is pinned to one ref, so what this detects is that ref moving.
 * Nothing is reported while the branch sits still, however much is pushed
 * elsewhere in the repository.
 */
export declare class GitHubWalk {
    private readonly accessor;
    constructor(accessor: GitHubAccessor);
    walk(root: PathSpec): AsyncGenerator<WalkEntry>;
}
export declare function buildDeltaHook(accessor: GitHubAccessor): DeltaHook;
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