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0df15188d7
PR-URL: https://github.com/nodejs/node/pull/57038 Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Stephen Belanger <admin@stephenbelanger.com> Reviewed-By: Geoffrey Booth <webadmin@geoffreybooth.com> Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
70 lines
1.8 KiB
JavaScript
70 lines
1.8 KiB
JavaScript
'use strict';
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const {
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RegExpPrototypeExec,
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} = primordials;
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const { getOptionValue } = require('internal/options');
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const { getValidatedPath } = require('internal/fs/utils');
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const fsBindings = internalBinding('fs');
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const { internal: internalConstants } = internalBinding('constants');
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const experimentalAddonModules = getOptionValue('--experimental-addon-modules');
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const extensionFormatMap = {
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'__proto__': null,
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'.cjs': 'commonjs',
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'.js': 'module',
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'.json': 'json',
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'.mjs': 'module',
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'.wasm': 'wasm',
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};
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if (experimentalAddonModules) {
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extensionFormatMap['.node'] = 'addon';
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}
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if (getOptionValue('--experimental-strip-types')) {
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extensionFormatMap['.ts'] = 'module-typescript';
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extensionFormatMap['.mts'] = 'module-typescript';
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extensionFormatMap['.cts'] = 'commonjs-typescript';
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}
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/**
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* @param {string} mime
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* @returns {string | null}
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*/
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function mimeToFormat(mime) {
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if (
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RegExpPrototypeExec(
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/^\s*(text|application)\/javascript\s*(;\s*charset=utf-?8\s*)?$/i,
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mime,
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) !== null
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) { return 'module'; }
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if (mime === 'application/json') { return 'json'; }
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if (mime === 'application/wasm') { return 'wasm'; }
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return null;
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}
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/**
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* For extensionless files in a `module` package scope, we check the file contents to disambiguate between ES module
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* JavaScript and Wasm.
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* We do this by taking advantage of the fact that all Wasm files start with the header `0x00 0x61 0x73 0x6d` (`_asm`).
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* @param {URL} url
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* @returns {'wasm'|'module'}
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*/
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function getFormatOfExtensionlessFile(url) {
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const path = getValidatedPath(url);
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switch (fsBindings.getFormatOfExtensionlessFile(path)) {
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case internalConstants.EXTENSIONLESS_FORMAT_WASM:
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return 'wasm';
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default:
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return 'module';
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}
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}
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module.exports = {
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extensionFormatMap,
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getFormatOfExtensionlessFile,
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mimeToFormat,
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};
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