/** Where a project's `@/` alias points, and how we worked that out. */
export interface ProjectPaths {
    /**
     * The directory `@/` resolves to, relative to the project root, with `/`
     * separators and no trailing slash. `''` means the project root itself.
     */
    aliasRoot: string;
    source: 'tsconfig.json' | 'jsconfig.json' | 'components.json' | 'default';
}
/**
 * Throws unless `projectPath` is somewhere components can actually be written,
 * and reports where under it they go.
 *
 * `baseDirOverride` comes from `components.json`; it wins outright, for the
 * projects whose alias lives in an extended base config or whose tsconfig we
 * otherwise read wrong.
 */
export declare function assertUsableProject(projectPath: string, baseDirOverride?: string): Promise<ProjectPaths>;