/
Transform.ts
59 lines (49 loc) · 1.38 KB
/
Transform.ts
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/**
* Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
import {Script} from 'vm';
import {RawSourceMap} from 'source-map';
import {Path, ProjectConfig} from './Config';
// https://stackoverflow.com/a/48216010/1850276
type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
// This is fixed in a newer version, but that depends on Node 8 which is a
// breaking change (engine warning when installing)
interface FixedRawSourceMap extends Omit<RawSourceMap, 'version'> {
version: number;
}
export type TransformedSource = {
code: string;
map?: FixedRawSourceMap | string | null;
};
export type TransformResult = {
script: Script;
mapCoverage: boolean;
sourceMapPath?: string;
};
export type TransformOptions = {
instrument: boolean;
};
export type CacheKeyOptions = {
config: ProjectConfig;
instrument: boolean;
rootDir: string;
};
export type Transformer = {
canInstrument?: boolean;
createTransformer?: (options: any) => Transformer;
getCacheKey: (
fileData: string,
filePath: Path,
configStr: string,
options: CacheKeyOptions,
) => string;
process: (
sourceText: string,
sourcePath: Path,
config: ProjectConfig,
options?: TransformOptions,
) => string | TransformedSource;
};