import ignore from 'ignore';
export declare const GITIGNORE_FILENAME = ".gitignore";
export declare const ALWAYS_IGNORED_DIRS: Set<string>;
export interface GitignoreMatcher {
    /** Directory the `.gitignore` governs: '' for the root, or e.g. 'sub/'. */
    dir: string;
    filter: ReturnType<typeof ignore>;
}
export declare function isGitignored(name: string, matchers: GitignoreMatcher[]): boolean;
/** Walk a directory tree; returns kept files as posix paths relative to the root, plus the count
 *  of ignored entries. */
export declare function walkWithGitignore(root: string): Promise<{
    kept: string[];
    ignored: number;
}>;
/** The nearest ancestor (including start) holding a package.json — the project root. */
export declare function findInstallRoot(cwd?: string): Promise<string>;
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