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bbc254db5d
PR-URL: https://github.com/nodejs/node/pull/27659 Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Myles Borins <myles.borins@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
101 lines
3.0 KiB
JavaScript
101 lines
3.0 KiB
JavaScript
'use strict';
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const internalFS = require('internal/fs/utils');
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const { NativeModule } = require('internal/bootstrap/loaders');
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const { extname } = require('path');
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const { realpathSync } = require('fs');
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const { getOptionValue } = require('internal/options');
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const preserveSymlinks = getOptionValue('--preserve-symlinks');
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const preserveSymlinksMain = getOptionValue('--preserve-symlinks-main');
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const experimentalJsonModules = getOptionValue('--experimental-json-modules');
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const typeFlag = getOptionValue('--input-type');
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const experimentalWasmModules = getOptionValue('--experimental-wasm-modules');
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const { resolve: moduleWrapResolve,
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getPackageType } = internalBinding('module_wrap');
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const { pathToFileURL, fileURLToPath } = require('internal/url');
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const { ERR_INPUT_TYPE_NOT_ALLOWED,
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ERR_UNKNOWN_FILE_EXTENSION } = require('internal/errors').codes;
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const { SafeMap } = primordials;
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const realpathCache = new SafeMap();
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// const TYPE_NONE = 0;
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// const TYPE_COMMONJS = 1;
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const TYPE_MODULE = 2;
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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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function resolve(specifier, parentURL) {
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if (NativeModule.canBeRequiredByUsers(specifier)) {
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return {
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url: specifier,
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format: 'builtin'
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};
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}
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const isMain = parentURL === undefined;
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if (isMain)
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parentURL = pathToFileURL(`${process.cwd()}/`).href;
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let url = moduleWrapResolve(specifier, parentURL);
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if (isMain ? !preserveSymlinksMain : !preserveSymlinks) {
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const real = realpathSync(fileURLToPath(url), {
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[internalFS.realpathCacheKey]: realpathCache
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});
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const old = url;
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url = pathToFileURL(real);
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url.search = old.search;
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url.hash = old.hash;
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}
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const type = getPackageType(url.href);
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const ext = extname(url.pathname);
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const extMap =
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type !== TYPE_MODULE ? legacyExtensionFormatMap : extensionFormatMap;
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let format = extMap[ext];
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if (isMain && typeFlag) {
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// This is the initial entry point to the program, and --input-type has
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// been passed as an option; but --input-type can only be used with
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// --eval, --print or STDIN string input. It is not allowed with file
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// input, to avoid user confusion over how expansive the effect of the
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// flag should be (i.e. entry point only, package scope surrounding the
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// entry point, etc.).
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throw new ERR_INPUT_TYPE_NOT_ALLOWED();
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}
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if (!format) {
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if (isMain)
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format = type === TYPE_MODULE ? 'module' : 'commonjs';
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else
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throw new ERR_UNKNOWN_FILE_EXTENSION(fileURLToPath(url),
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fileURLToPath(parentURL));
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}
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return { url: `${url}`, format };
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}
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module.exports = resolve;
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