/**
 * @license MIT
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.dev/license
 */
import { Tree } from '@angular-devkit/schematics';
import ts from 'typescript';
export interface ProgramOptions {
    host: ts.CompilerHost;
    options: ts.CompilerOptions;
    rootNames: string[];
}
type FakeReadFileFunction = (fileName: string) => string | undefined;
/**
 * Creates a TypeScript program instance for a TypeScript project within the virtual file system tree.
 * @param tree Virtual file system tree that contains the source files.
 * @param tsconfigPath Virtual file system path that resolves to the TypeScript project.
 * @param basePath Base path for the virtual file system tree.
 * @param fakeFileRead Optional file reader function. Can be used to overwrite files in the TypeScript program, or to
 * add in-memory files (e.g. to add global types).
 * @param additionalFiles Additional file paths that should be added to the program.
 * @returns The program instance
 */
export declare function createMigrationProgram(tree: Tree, tsconfigPath: string, basePath: string, fakeFileRead?: FakeReadFileFunction, additionalFiles?: string[]): ts.Program;
/**
 * Creates the options necessary to instantiate a TypeScript program.
 * @param tree Virtual file system tree that contains the source files.
 * @param tsconfigPath Virtual file system path that resolves to the TypeScript project.
 * @param basePath Base path for the virtual file system tree.
 * @param fakeFileRead Optional file reader function. Can be used to overwrite files in the TypeScript program, or to
 * add in-memory files (e.g. to add global types).
 * @param additionalFiles Additional file paths that should be added to the program.
 * @param optionOverrides Overrides of the parsed compiler options.
 * @returns The option
 */
export declare function createProgramOptions(tree: Tree, tsconfigPath: string, basePath: string, fakeFileRead?: FakeReadFileFunction, additionalFiles?: string[], optionOverrides?: ts.CompilerOptions): ProgramOptions;
/**
 * Checks whether a file can be migrated by our automated migrations.
 * @param basePath Absolute path to the project.
 * @param sourceFile File being checked.
 * @param program Program that includes the source file.
 * @returns If the file can be migrated
 */
export declare function canMigrateFile(basePath: string, sourceFile: ts.SourceFile, program: ts.Program): boolean;
export {};