107 lines
3.4 KiB
JavaScript
107 lines
3.4 KiB
JavaScript
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// Copied from https://raw.githubusercontent.com/nodejs/node/v15.3.0/lib/internal/modules/esm/get_format.js
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'use strict';
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const {
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RegExpPrototypeExec,
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StringPrototypeStartsWith,
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} = require('./node-primordials');
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const { extname } = require('path');
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const { getOptionValue } = require('./node-options');
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const [nodeMajor, nodeMinor] = process.versions.node.split('.').map(s => parseInt(s, 10));
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const experimentalJsonModules =
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nodeMajor > 17
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|| (nodeMajor === 17 && nodeMinor >= 5)
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|| (nodeMajor === 16 && nodeMinor >= 15)
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|| getOptionValue('--experimental-json-modules');
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const experimentalWasmModules = getOptionValue('--experimental-wasm-modules');
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const { URL, fileURLToPath } = require('url');
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const { ERR_UNKNOWN_FILE_EXTENSION } = require('./node-internal-errors').codes;
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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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'.mjs': 'module'
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};
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const legacyExtensionFormatMap = {
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'__proto__': null,
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'.cjs': 'commonjs',
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'.js': 'commonjs',
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'.json': 'commonjs',
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'.mjs': 'module',
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'.node': 'commonjs'
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};
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if (experimentalWasmModules)
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extensionFormatMap['.wasm'] = legacyExtensionFormatMap['.wasm'] = 'wasm';
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if (experimentalJsonModules)
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extensionFormatMap['.json'] = legacyExtensionFormatMap['.json'] = 'json';
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/**
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*
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* @param {'node' | 'explicit'} [tsNodeExperimentalSpecifierResolution]
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* @param {ReturnType<
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* typeof import('../dist-raw/node-internal-modules-esm-resolve').createResolve
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* >} nodeEsmResolver
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*/
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function createGetFormat(tsNodeExperimentalSpecifierResolution, nodeEsmResolver) {
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// const experimentalSpeciferResolution = tsNodeExperimentalSpecifierResolution ?? getOptionValue('--experimental-specifier-resolution');
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let experimentalSpeciferResolution = tsNodeExperimentalSpecifierResolution != null ? tsNodeExperimentalSpecifierResolution : getOptionValue('--experimental-specifier-resolution');
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const { getPackageType } = nodeEsmResolver;
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/**
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* @param {string} url
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* @param {{}} context
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* @param {any} defaultGetFormatUnused
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* @returns {ReturnType<import('../src/esm').NodeLoaderHooksAPI1.GetFormatHook>}
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*/
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function defaultGetFormat(url, context, defaultGetFormatUnused) {
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if (StringPrototypeStartsWith(url, 'node:')) {
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return { format: 'builtin' };
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}
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const parsed = new URL(url);
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if (parsed.protocol === 'data:') {
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const [ , mime ] = RegExpPrototypeExec(
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/^([^/]+\/[^;,]+)(?:[^,]*?)(;base64)?,/,
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parsed.pathname,
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) || [ null, null, null ];
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const format = ({
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'__proto__': null,
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'text/javascript': 'module',
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'application/json': experimentalJsonModules ? 'json' : null,
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'application/wasm': experimentalWasmModules ? 'wasm' : null
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})[mime] || null;
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return { format };
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} else if (parsed.protocol === 'file:') {
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const ext = extname(parsed.pathname);
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let format;
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if (ext === '.js') {
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format = getPackageType(parsed.href) === 'module' ? 'module' : 'commonjs';
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} else {
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format = extensionFormatMap[ext];
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}
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if (!format) {
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if (experimentalSpeciferResolution === 'node') {
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process.emitWarning(
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'The Node.js specifier resolution in ESM is experimental.',
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'ExperimentalWarning');
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format = legacyExtensionFormatMap[ext];
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} else {
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throw new ERR_UNKNOWN_FILE_EXTENSION(ext, fileURLToPath(url));
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}
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}
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return { format: format || null };
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}
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return { format: null };
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}
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return {defaultGetFormat};
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}
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module.exports = {
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createGetFormat
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};
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