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6431622a6d
This PR fixes an issue where we recursively analysed imports on plain JS files in the compiler irrespective of "checkJs" being true. This caused problems where when analysing the imports of those files, we would mistake some import like structures (AMD/CommonJS) as dependencies and try to resolve the "modules" even though the compiler would not actually look at those files.
192 lines
5.8 KiB
TypeScript
192 lines
5.8 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import {
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getMappedModuleName,
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parseTypeDirectives
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} from "./compiler_type_directives.ts";
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import { assert, log } from "./util.ts";
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// Warning! The values in this enum are duplicated in `cli/msg.rs`
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// Update carefully!
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export enum MediaType {
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JavaScript = 0,
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JSX = 1,
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TypeScript = 2,
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TSX = 3,
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Json = 4,
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Wasm = 5,
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Unknown = 6
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}
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/** The shape of the SourceFile that comes from the privileged side */
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export interface SourceFileJson {
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url: string;
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filename: string;
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mediaType: MediaType;
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sourceCode: string;
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}
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export const ASSETS = "$asset$";
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/** Returns the TypeScript Extension enum for a given media type. */
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function getExtension(fileName: string, mediaType: MediaType): ts.Extension {
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switch (mediaType) {
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case MediaType.JavaScript:
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return ts.Extension.Js;
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case MediaType.JSX:
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return ts.Extension.Jsx;
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case MediaType.TypeScript:
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return fileName.endsWith(".d.ts") ? ts.Extension.Dts : ts.Extension.Ts;
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case MediaType.TSX:
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return ts.Extension.Tsx;
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case MediaType.Json:
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return ts.Extension.Json;
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case MediaType.Wasm:
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// Custom marker for Wasm type.
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return ts.Extension.Js;
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case MediaType.Unknown:
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default:
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throw TypeError(
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`Cannot resolve extension for "${fileName}" with mediaType "${MediaType[mediaType]}".`
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);
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}
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}
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/** A self registering abstraction of source files. */
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export class SourceFile {
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extension!: ts.Extension;
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filename!: string;
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/** An array of tuples which represent the imports for the source file. The
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* first element is the one that will be requested at compile time, the
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* second is the one that should be actually resolved. This provides the
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* feature of type directives for Deno. */
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importedFiles?: Array<[string, string]>;
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mediaType!: MediaType;
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processed = false;
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sourceCode?: string;
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tsSourceFile?: ts.SourceFile;
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url!: string;
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constructor(json: SourceFileJson) {
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if (SourceFile._moduleCache.has(json.url)) {
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throw new TypeError("SourceFile already exists");
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}
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Object.assign(this, json);
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this.extension = getExtension(this.url, this.mediaType);
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SourceFile._moduleCache.set(this.url, this);
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}
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/** Cache the source file to be able to be retrieved by `moduleSpecifier` and
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* `containingFile`. */
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cache(moduleSpecifier: string, containingFile?: string): void {
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containingFile = containingFile || "";
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let innerCache = SourceFile._specifierCache.get(containingFile);
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if (!innerCache) {
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innerCache = new Map();
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SourceFile._specifierCache.set(containingFile, innerCache);
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}
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innerCache.set(moduleSpecifier, this);
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}
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/** Process the imports for the file and return them. */
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imports(checkJs: boolean): Array<[string, string]> {
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if (this.processed) {
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throw new Error("SourceFile has already been processed.");
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}
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assert(this.sourceCode != null);
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// we shouldn't process imports for files which contain the nocheck pragma
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// (like bundles)
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if (this.sourceCode.match(/\/{2}\s+@ts-nocheck/)) {
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log(`Skipping imports for "${this.filename}"`);
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return [];
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}
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const preProcessedFileInfo = ts.preProcessFile(
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this.sourceCode,
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true,
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this.mediaType === MediaType.JavaScript ||
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this.mediaType === MediaType.JSX
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);
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this.processed = true;
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const files = (this.importedFiles = [] as Array<[string, string]>);
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function process(references: Array<{ fileName: string }>): void {
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for (const { fileName } of references) {
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files.push([fileName, fileName]);
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}
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}
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const {
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importedFiles,
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referencedFiles,
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libReferenceDirectives,
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typeReferenceDirectives
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} = preProcessedFileInfo;
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const typeDirectives = parseTypeDirectives(this.sourceCode);
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if (typeDirectives) {
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for (const importedFile of importedFiles) {
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files.push([
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importedFile.fileName,
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getMappedModuleName(importedFile, typeDirectives)
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]);
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}
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} else if (
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!(
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!checkJs &&
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(this.mediaType === MediaType.JavaScript ||
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this.mediaType === MediaType.JSX)
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)
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) {
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process(importedFiles);
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}
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process(referencedFiles);
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// built in libs comes across as `"dom"` for example, and should be filtered
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// out during pre-processing as they are either already cached or they will
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// be lazily fetched by the compiler host. Ones that contain full files are
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// not filtered out and will be fetched as normal.
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process(
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libReferenceDirectives.filter(
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({ fileName }) => !ts.libMap.has(fileName.toLowerCase())
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)
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);
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process(typeReferenceDirectives);
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return files;
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}
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/** A cache of all the source files which have been loaded indexed by the
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* url. */
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private static _moduleCache: Map<string, SourceFile> = new Map();
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/** A cache of source files based on module specifiers and containing files
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* which is used by the TypeScript compiler to resolve the url */
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private static _specifierCache: Map<
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string,
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Map<string, SourceFile>
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> = new Map();
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/** Retrieve a `SourceFile` based on a `moduleSpecifier` and `containingFile`
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* or return `undefined` if not preset. */
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static getUrl(
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moduleSpecifier: string,
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containingFile: string
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): string | undefined {
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const containingCache = this._specifierCache.get(containingFile);
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if (containingCache) {
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const sourceFile = containingCache.get(moduleSpecifier);
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return sourceFile && sourceFile.url;
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}
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return undefined;
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}
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/** Retrieve a `SourceFile` based on a `url` */
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static get(url: string): SourceFile | undefined {
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return this._moduleCache.get(url);
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}
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/** Determine if a source file exists or not */
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static has(url: string): boolean {
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return this._moduleCache.has(url);
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}
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}
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