import { Tree } from '@angular-devkit/schematics';
import { ProjectDefinition, WorkspaceDefinition } from '@schematics/angular/utility';
/**
 * Get project from workspace by name or get directly if single project.
 * @param tree Host tree
 * @param projectName Project name from schema
 * @returns Project definition or undefined
 */
export declare function getActiveProject(workspace: WorkspaceDefinition, projectName?: string): Promise<ProjectDefinition | undefined>;
/**
 * Get package version by looking at the package.json in the given tree
 */
export declare function getPackageVersionFromPackageJson(tree: Tree, name: string, includeDevDependencies?: boolean): string | null;
/**
 * Get options for the build target of the given project
 */
export declare function getProjectTargetOptions(project: ProjectDefinition, buildTarget: string): Record<string, import("@angular-devkit/core").JsonValue | undefined>;
/**
 * Gets a style file with the given extension in a project and returns its path. If no
 * extension is specified, it will return null.
 */
export declare function getProjectStyleFile(project: ProjectDefinition): string | null;
/**
 * Adds a package to the package.json in the given tree
 */
export declare function addPackageToPackageJson(tree: Tree, pkg: string, version: string, devDependency?: boolean): Tree;