import { Path, workspaces } from '@angular-devkit/core';
import { Tree } from '@angular-devkit/schematics';
/**
 * Gets a style file with the given extension in a project and returns its path.
 * If no extension is specified, any style file with a valid extension will be
 * returned.
 * @param project Project for which to fetch the style file.
 * @param extension Expected style file extension.
 * @returns Path of the project's style file.
 */
export declare function getProjectStyleFilePath(project: workspaces.ProjectDefinition, extension?: string): Path | null;
/**
 * Adds a style path to a project's build or test target.
 * @param host Source tree.
 * @param projectName Name of the project where to add the style path.
 * @param targetName Target on which to add the style path.
 * @param stylePath Path of the style file to add.
 */
export declare function addStylePathToProjectTarget(host: Tree, projectName: string, targetName: 'build' | 'test', stylePath: Path): Promise<void>;