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const {
ArrayIsArray,
ArrayPrototypeConcat,
ArrayPrototypeJoin,
ArrayPrototypeShift,
JSONStringify,
ObjectFreeze,
ObjectGetOwnPropertyNames,
ObjectPrototypeHasOwnProperty,
RegExp,
RegExpPrototypeExec,
RegExpPrototypeSymbolReplace,
SafeMap,
SafeSet,
String,
StringPrototypeEndsWith,
StringPrototypeIncludes,
StringPrototypeIndexOf,
StringPrototypeLastIndexOf,
StringPrototypeReplace,
StringPrototypeSlice,
StringPrototypeSplit,
StringPrototypeStartsWith,
} = primordials;
const internalFS = require('internal/fs/utils');
const { BuiltinModule } = require('internal/bootstrap/loaders');
const {
realpathSync,
statSync,
Stats,
} = require('fs');
const { getOptionValue } = require('internal/options');
// Do not eagerly grab .manifest, it may be in TDZ
const policy = getOptionValue('--experimental-policy') ?
require('internal/process/policy') :
null;
const { sep, relative } = require('path');
const preserveSymlinks = getOptionValue('--preserve-symlinks');
const preserveSymlinksMain = getOptionValue('--preserve-symlinks-main');
const experimentalNetworkImports =
getOptionValue('--experimental-network-imports');
const typeFlag = getOptionValue('--input-type');
const { URL, pathToFileURL, fileURLToPath } = require('internal/url');
const {
ERR_INPUT_TYPE_NOT_ALLOWED,
ERR_INVALID_ARG_VALUE,
ERR_INVALID_MODULE_SPECIFIER,
ERR_INVALID_PACKAGE_CONFIG,
ERR_INVALID_PACKAGE_TARGET,
ERR_MANIFEST_DEPENDENCY_MISSING,
ERR_MODULE_NOT_FOUND,
ERR_PACKAGE_IMPORT_NOT_DEFINED,
ERR_PACKAGE_PATH_NOT_EXPORTED,
ERR_UNSUPPORTED_DIR_IMPORT,
ERR_NETWORK_IMPORT_DISALLOWED,
ERR_UNSUPPORTED_ESM_URL_SCHEME,
} = require('internal/errors').codes;
const { Module: CJSModule } = require('internal/modules/cjs/loader');
const { getPackageConfig, getPackageScopeConfig } = require('internal/modules/esm/package_config');
/**
* @typedef {import('internal/modules/esm/package_config.js').PackageConfig} PackageConfig
*/
const userConditions = getOptionValue('--conditions');
const noAddons = getOptionValue('--no-addons');
const addonConditions = noAddons ? [] : ['node-addons'];
const DEFAULT_CONDITIONS = ObjectFreeze([
'node',
'import',
...addonConditions,
...userConditions,
]);
const DEFAULT_CONDITIONS_SET = new SafeSet(DEFAULT_CONDITIONS);
const emittedPackageWarnings = new SafeSet();
function emitTrailingSlashPatternDeprecation(match, pjsonUrl, base) {
const pjsonPath = fileURLToPath(pjsonUrl);
if (emittedPackageWarnings.has(pjsonPath + '|' + match))
return;
emittedPackageWarnings.add(pjsonPath + '|' + match);
process.emitWarning(
`Use of deprecated trailing slash pattern mapping "${match}" in the ` +
`"exports" field module resolution of the package at ${pjsonPath}${
base ? ` imported from ${fileURLToPath(base)}` :
''}. Mapping specifiers ending in "/" is no longer supported.`,
'DeprecationWarning',
'DEP0155'
);
}
const doubleSlashRegEx = /[/\\][/\\]/;
function emitInvalidSegmentDeprecation(target, request, match, pjsonUrl, base) {
const pjsonPath = fileURLToPath(pjsonUrl);
const double = RegExpPrototypeExec(doubleSlashRegEx, target) !== null;
process.emitWarning(
`Use of deprecated ${double ? 'double slash' :
'leading or trailing slash matching'} resolving "${target}" for module ` +
`request "${request}" ${request !== match ? `matched to "${match}" ` : ''
}in the "exports" field module resolution of the package at ${pjsonPath}${
base ? ` imported from ${fileURLToPath(base)}` : ''}.`,
'DeprecationWarning',
'DEP0166'
);
}
/**
* @param {URL} url
* @param {URL} packageJSONUrl
* @param {string | URL | undefined} base
* @param {string} main
* @returns {void}
*/
function emitLegacyIndexDeprecation(url, packageJSONUrl, base, main) {
const format = defaultGetFormatWithoutErrors(url);
if (format !== 'module')
return;
const path = fileURLToPath(url);
const pkgPath = fileURLToPath(new URL('.', packageJSONUrl));
const basePath = fileURLToPath(base);
if (main)
process.emitWarning(
`Package ${pkgPath} has a "main" field set to ${JSONStringify(main)}, ` +
`excluding the full filename and extension to the resolved file at "${
StringPrototypeSlice(path, pkgPath.length)}", imported from ${
basePath}.\n Automatic extension resolution of the "main" field is ` +
'deprecated for ES modules.',
'DeprecationWarning',
'DEP0151'
);
else
process.emitWarning(
`No "main" or "exports" field defined in the package.json for ${pkgPath
} resolving the main entry point "${
StringPrototypeSlice(path, pkgPath.length)}", imported from ${basePath
}.\nDefault "index" lookups for the main are deprecated for ES modules.`,
'DeprecationWarning',
'DEP0151'
);
}
/**
* @param {string[]} [conditions]
* @returns {Set<string>}
*/
function getConditionsSet(conditions) {
if (conditions !== undefined && conditions !== DEFAULT_CONDITIONS) {
if (!ArrayIsArray(conditions)) {
throw new ERR_INVALID_ARG_VALUE('conditions', conditions,
'expected an array');
}
return new SafeSet(conditions);
}
return DEFAULT_CONDITIONS_SET;
}
const realpathCache = new SafeMap();
/**
* @param {string | URL} path
* @returns {import('fs').Stats}
*/
const tryStatSync =
(path) => statSync(path, { throwIfNoEntry: false }) ?? new Stats();
/**
* @param {string | URL} url
* @returns {boolean}
*/
function fileExists(url) {
return statSync(url, { throwIfNoEntry: false })?.isFile() ?? false;
}
/**
* Legacy CommonJS main resolution:
* 1. let M = pkg_url + (json main field)
* 2. TRY(M, M.js, M.json, M.node)
* 3. TRY(M/index.js, M/index.json, M/index.node)
* 4. TRY(pkg_url/index.js, pkg_url/index.json, pkg_url/index.node)
* 5. NOT_FOUND
* @param {URL} packageJSONUrl
* @param {PackageConfig} packageConfig
* @param {string | URL | undefined} base
* @returns {URL}
*/
function legacyMainResolve(packageJSONUrl, packageConfig, base) {
let guess;
if (packageConfig.main !== undefined) {
// Note: fs check redundances will be handled by Descriptor cache here.
if (fileExists(guess = new URL(`./${packageConfig.main}`,
packageJSONUrl))) {
return guess;
} else if (fileExists(guess = new URL(`./${packageConfig.main}.js`,
packageJSONUrl)));
else if (fileExists(guess = new URL(`./${packageConfig.main}.json`,
packageJSONUrl)));
else if (fileExists(guess = new URL(`./${packageConfig.main}.node`,
packageJSONUrl)));
else if (fileExists(guess = new URL(`./${packageConfig.main}/index.js`,
packageJSONUrl)));
else if (fileExists(guess = new URL(`./${packageConfig.main}/index.json`,
packageJSONUrl)));
else if (fileExists(guess = new URL(`./${packageConfig.main}/index.node`,
packageJSONUrl)));
else guess = undefined;
if (guess) {
emitLegacyIndexDeprecation(guess, packageJSONUrl, base,
packageConfig.main);
return guess;
}
// Fallthrough.
}
if (fileExists(guess = new URL('./index.js', packageJSONUrl)));
// So fs.
else if (fileExists(guess = new URL('./index.json', packageJSONUrl)));
else if (fileExists(guess = new URL('./index.node', packageJSONUrl)));
else guess = undefined;
if (guess) {
emitLegacyIndexDeprecation(guess, packageJSONUrl, base, packageConfig.main);
return guess;
}
// Not found.
throw new ERR_MODULE_NOT_FOUND(
fileURLToPath(new URL('.', packageJSONUrl)), fileURLToPath(base));
}
const encodedSepRegEx = /%2F|%5C/i;
/**
* @param {URL} resolved
* @param {string | URL | undefined} base
* @param {boolean} preserveSymlinks
* @returns {URL | undefined}
*/
function finalizeResolution(resolved, base, preserveSymlinks) {
if (RegExpPrototypeExec(encodedSepRegEx, resolved.pathname) !== null)
throw new ERR_INVALID_MODULE_SPECIFIER(
resolved.pathname, 'must not include encoded "/" or "\\" characters',
fileURLToPath(base));
const path = fileURLToPath(resolved);
const stats = tryStatSync(StringPrototypeEndsWith(path, '/') ?
StringPrototypeSlice(path, -1) : path);
if (stats.isDirectory()) {
const err = new ERR_UNSUPPORTED_DIR_IMPORT(path, fileURLToPath(base));
err.url = String(resolved);
throw err;
} else if (!stats.isFile()) {
throw new ERR_MODULE_NOT_FOUND(
path || resolved.pathname, base && fileURLToPath(base), 'module');
}
if (!preserveSymlinks) {
const real = realpathSync(path, {
[internalFS.realpathCacheKey]: realpathCache
});
const { search, hash } = resolved;
resolved =
pathToFileURL(real + (StringPrototypeEndsWith(path, sep) ? '/' : ''));
resolved.search = search;
resolved.hash = hash;
}
return resolved;
}
/**
* @param {string} specifier
* @param {URL} packageJSONUrl
* @param {string | URL | undefined} base
*/
function throwImportNotDefined(specifier, packageJSONUrl, base) {
throw new ERR_PACKAGE_IMPORT_NOT_DEFINED(
specifier, packageJSONUrl && fileURLToPath(new URL('.', packageJSONUrl)),
fileURLToPath(base));
}
/**
* @param {string} subpath
* @param {URL} packageJSONUrl
* @param {string | URL | undefined} base
*/
function throwExportsNotFound(subpath, packageJSONUrl, base) {
throw new ERR_PACKAGE_PATH_NOT_EXPORTED(
fileURLToPath(new URL('.', packageJSONUrl)), subpath,
base && fileURLToPath(base));
}
/**
*
* @param {string} request
* @param {string} match
* @param {URL} packageJSONUrl
* @param {boolean} internal
* @param {string | URL | undefined} base
*/
function throwInvalidSubpath(request, match, packageJSONUrl, internal, base) {
const reason = `request is not a valid match in pattern "${match}" for the "${
internal ? 'imports' : 'exports'}" resolution of ${
fileURLToPath(packageJSONUrl)}`;
throw new ERR_INVALID_MODULE_SPECIFIER(request, reason,
base && fileURLToPath(base));
}
function throwInvalidPackageTarget(
subpath, target, packageJSONUrl, internal, base) {
if (typeof target === 'object' && target !== null) {
target = JSONStringify(target, null, '');
} else {
target = `${target}`;
}
throw new ERR_INVALID_PACKAGE_TARGET(
fileURLToPath(new URL('.', packageJSONUrl)), subpath, target,
internal, base && fileURLToPath(base));
}
const invalidSegmentRegEx = /(^|\\|\/)((\.|%2e)(\.|%2e)?|(n|%6e|%4e)(o|%6f|%4f)(d|%64|%44)(e|%65|%45)(_|%5f)(m|%6d|%4d)(o|%6f|%4f)(d|%64|%44)(u|%75|%55)(l|%6c|%4c)(e|%65|%45)(s|%73|%53))?(\\|\/|$)/i;
const deprecatedInvalidSegmentRegEx = /(^|\\|\/)((\.|%2e)(\.|%2e)?|(n|%6e|%4e)(o|%6f|%4f)(d|%64|%44)(e|%65|%45)(_|%5f)(m|%6d|%4d)(o|%6f|%4f)(d|%64|%44)(u|%75|%55)(l|%6c|%4c)(e|%65|%45)(s|%73|%53))(\\|\/|$)/i;
const invalidPackageNameRegEx = /^\.|%|\\/;
const patternRegEx = /\*/g;
function resolvePackageTargetString(
target,
subpath,
match,
packageJSONUrl,
base,
pattern,
internal,
isPathMap,
conditions,
) {
if (subpath !== '' && !pattern && target[target.length - 1] !== '/')
throwInvalidPackageTarget(match, target, packageJSONUrl, internal, base);
if (!StringPrototypeStartsWith(target, './')) {
if (internal && !StringPrototypeStartsWith(target, '../') &&
!StringPrototypeStartsWith(target, '/')) {
let isURL = false;
try {
new URL(target);
isURL = true;
} catch {
// Continue regardless of error.
}
if (!isURL) {
const exportTarget = pattern ?
RegExpPrototypeSymbolReplace(patternRegEx, target, () => subpath) :
target + subpath;
return packageResolve(
exportTarget, packageJSONUrl, conditions);
}
}
throwInvalidPackageTarget(match, target, packageJSONUrl, internal, base);
}
if (RegExpPrototypeExec(invalidSegmentRegEx, StringPrototypeSlice(target, 2)) !== null) {
if (RegExpPrototypeExec(deprecatedInvalidSegmentRegEx, StringPrototypeSlice(target, 2)) === null) {
if (!isPathMap) {
const request = pattern ?
StringPrototypeReplace(match, '*', () => subpath) :
match + subpath;
const resolvedTarget = pattern ?
RegExpPrototypeSymbolReplace(patternRegEx, target, () => subpath) :
target;
emitInvalidSegmentDeprecation(resolvedTarget, request, match, packageJSONUrl, base);
}
} else {
throwInvalidPackageTarget(match, target, packageJSONUrl, internal, base);
}
}
const resolved = new URL(target, packageJSONUrl);
const resolvedPath = resolved.pathname;
const packagePath = new URL('.', packageJSONUrl).pathname;
if (!StringPrototypeStartsWith(resolvedPath, packagePath))
throwInvalidPackageTarget(match, target, packageJSONUrl, internal, base);
if (subpath === '') return resolved;
if (RegExpPrototypeExec(invalidSegmentRegEx, subpath) !== null) {
const request = pattern ? StringPrototypeReplace(match, '*', () => subpath) : match + subpath;
if (RegExpPrototypeExec(deprecatedInvalidSegmentRegEx, subpath) === null) {
if (!isPathMap) {
const resolvedTarget = pattern ?
RegExpPrototypeSymbolReplace(patternRegEx, target, () => subpath) :
target;
emitInvalidSegmentDeprecation(resolvedTarget, request, match, packageJSONUrl, base);
}
} else {
throwInvalidSubpath(request, match, packageJSONUrl, internal, base);
}
}
if (pattern) {
return new URL(
RegExpPrototypeSymbolReplace(patternRegEx, resolved.href, () => subpath)
);
}
return new URL(subpath, resolved);
}
/**
* @param {string} key
* @returns {boolean}
*/
function isArrayIndex(key) {
const keyNum = +key;
if (`${keyNum}` !== key) return false;
return keyNum >= 0 && keyNum < 0xFFFF_FFFF;
}
function resolvePackageTarget(packageJSONUrl, target, subpath, packageSubpath,
base, pattern, internal, isPathMap, conditions) {
if (typeof target === 'string') {
return resolvePackageTargetString(
target, subpath, packageSubpath, packageJSONUrl, base, pattern, internal,
isPathMap, conditions);
} else if (ArrayIsArray(target)) {
if (target.length === 0) {
return null;
}
let lastException;
for (let i = 0; i < target.length; i++) {
const targetItem = target[i];
let resolveResult;
try {
resolveResult = resolvePackageTarget(
packageJSONUrl, targetItem, subpath, packageSubpath, base, pattern,
internal, isPathMap, conditions);
} catch (e) {
lastException = e;
if (e.code === 'ERR_INVALID_PACKAGE_TARGET') {
continue;
}
throw e;
}
if (resolveResult === undefined) {
continue;
}
if (resolveResult === null) {
lastException = null;
continue;
}
return resolveResult;
}
if (lastException === undefined || lastException === null)
return lastException;
throw lastException;
} else if (typeof target === 'object' && target !== null) {
const keys = ObjectGetOwnPropertyNames(target);
for (let i = 0; i < keys.length; i++) {
const key = keys[i];
if (isArrayIndex(key)) {
throw new ERR_INVALID_PACKAGE_CONFIG(
fileURLToPath(packageJSONUrl), base,
'"exports" cannot contain numeric property keys.');
}
}
for (let i = 0; i < keys.length; i++) {
const key = keys[i];
if (key === 'default' || conditions.has(key)) {
const conditionalTarget = target[key];
const resolveResult = resolvePackageTarget(
packageJSONUrl, conditionalTarget, subpath, packageSubpath, base,
pattern, internal, isPathMap, conditions);
if (resolveResult === undefined)
continue;
return resolveResult;
}
}
return undefined;
} else if (target === null) {
return null;
}
throwInvalidPackageTarget(packageSubpath, target, packageJSONUrl, internal,
base);
}
/**
*
* @param {import('internal/modules/esm/package_config.js').Exports} exports
* @param {URL} packageJSONUrl
* @param {string | URL | undefined} base
* @returns {boolean}
*/
function isConditionalExportsMainSugar(exports, packageJSONUrl, base) {
if (typeof exports === 'string' || ArrayIsArray(exports)) return true;
if (typeof exports !== 'object' || exports === null) return false;
const keys = ObjectGetOwnPropertyNames(exports);
let isConditionalSugar = false;
let i = 0;
for (let j = 0; j < keys.length; j++) {
const key = keys[j];
const curIsConditionalSugar = key === '' || key[0] !== '.';
if (i++ === 0) {
isConditionalSugar = curIsConditionalSugar;
} else if (isConditionalSugar !== curIsConditionalSugar) {
throw new ERR_INVALID_PACKAGE_CONFIG(
fileURLToPath(packageJSONUrl), base,
'"exports" cannot contain some keys starting with \'.\' and some not.' +
' The exports object must either be an object of package subpath keys' +
' or an object of main entry condition name keys only.');
}
}
return isConditionalSugar;
}
/**
* @param {URL} packageJSONUrl
* @param {string} packageSubpath
* @param {PackageConfig} packageConfig
* @param {string | URL | undefined} base
* @param {Set<string>} conditions
* @returns {URL}
*/
function packageExportsResolve(
packageJSONUrl, packageSubpath, packageConfig, base, conditions) {
let exports = packageConfig.exports;
if (isConditionalExportsMainSugar(exports, packageJSONUrl, base))
exports = { '.': exports };
if (ObjectPrototypeHasOwnProperty(exports, packageSubpath) &&
!StringPrototypeIncludes(packageSubpath, '*') &&
!StringPrototypeEndsWith(packageSubpath, '/')) {
const target = exports[packageSubpath];
const resolveResult = resolvePackageTarget(
packageJSONUrl, target, '', packageSubpath, base, false, false, false,
conditions
);
if (resolveResult == null) {
throwExportsNotFound(packageSubpath, packageJSONUrl, base);
}
return resolveResult;
}
let bestMatch = '';
let bestMatchSubpath;
const keys = ObjectGetOwnPropertyNames(exports);
for (let i = 0; i < keys.length; i++) {
const key = keys[i];
const patternIndex = StringPrototypeIndexOf(key, '*');
if (patternIndex !== -1 &&
StringPrototypeStartsWith(packageSubpath,
StringPrototypeSlice(key, 0, patternIndex))) {
// When this reaches EOL, this can throw at the top of the whole function:
//
// if (StringPrototypeEndsWith(packageSubpath, '/'))
// throwInvalidSubpath(packageSubpath)
//
// To match "imports" and the spec.
if (StringPrototypeEndsWith(packageSubpath, '/'))
emitTrailingSlashPatternDeprecation(packageSubpath, packageJSONUrl,
base);
const patternTrailer = StringPrototypeSlice(key, patternIndex + 1);
if (packageSubpath.length >= key.length &&
StringPrototypeEndsWith(packageSubpath, patternTrailer) &&
patternKeyCompare(bestMatch, key) === 1 &&
StringPrototypeLastIndexOf(key, '*') === patternIndex) {
bestMatch = key;
bestMatchSubpath = StringPrototypeSlice(
packageSubpath, patternIndex,
packageSubpath.length - patternTrailer.length);
}
}
}
if (bestMatch) {
const target = exports[bestMatch];
const resolveResult = resolvePackageTarget(
packageJSONUrl,
target,
bestMatchSubpath,
bestMatch,
base,
true,
false,
StringPrototypeEndsWith(packageSubpath, '/'),
conditions);
if (resolveResult == null) {
throwExportsNotFound(packageSubpath, packageJSONUrl, base);
}
return resolveResult;
}
throwExportsNotFound(packageSubpath, packageJSONUrl, base);
}
function patternKeyCompare(a, b) {
const aPatternIndex = StringPrototypeIndexOf(a, '*');
const bPatternIndex = StringPrototypeIndexOf(b, '*');
const baseLenA = aPatternIndex === -1 ? a.length : aPatternIndex + 1;
const baseLenB = bPatternIndex === -1 ? b.length : bPatternIndex + 1;
if (baseLenA > baseLenB) return -1;
if (baseLenB > baseLenA) return 1;
if (aPatternIndex === -1) return 1;
if (bPatternIndex === -1) return -1;
if (a.length > b.length) return -1;
if (b.length > a.length) return 1;
return 0;
}
/**
* @param {string} name
* @param {string | URL | undefined} base
* @param {Set<string>} conditions
* @returns {URL}
*/
function packageImportsResolve(name, base, conditions) {
if (name === '#' || StringPrototypeStartsWith(name, '#/') ||
StringPrototypeEndsWith(name, '/')) {
const reason = 'is not a valid internal imports specifier name';
throw new ERR_INVALID_MODULE_SPECIFIER(name, reason, fileURLToPath(base));
}
let packageJSONUrl;
const packageConfig = getPackageScopeConfig(base);
if (packageConfig.exists) {
packageJSONUrl = pathToFileURL(packageConfig.pjsonPath);
const imports = packageConfig.imports;
if (imports) {
if (ObjectPrototypeHasOwnProperty(imports, name) &&
!StringPrototypeIncludes(name, '*')) {
const resolveResult = resolvePackageTarget(
packageJSONUrl, imports[name], '', name, base, false, true, false,
conditions
);
if (resolveResult != null) {
return resolveResult;
}
} else {
let bestMatch = '';
let bestMatchSubpath;
const keys = ObjectGetOwnPropertyNames(imports);
for (let i = 0; i < keys.length; i++) {
const key = keys[i];
const patternIndex = StringPrototypeIndexOf(key, '*');
if (patternIndex !== -1 &&
StringPrototypeStartsWith(name,
StringPrototypeSlice(key, 0,
patternIndex))) {
const patternTrailer = StringPrototypeSlice(key, patternIndex + 1);
if (name.length >= key.length &&
StringPrototypeEndsWith(name, patternTrailer) &&
patternKeyCompare(bestMatch, key) === 1 &&
StringPrototypeLastIndexOf(key, '*') === patternIndex) {
bestMatch = key;
bestMatchSubpath = StringPrototypeSlice(
name, patternIndex, name.length - patternTrailer.length);
}
}
}
if (bestMatch) {
const target = imports[bestMatch];
const resolveResult = resolvePackageTarget(packageJSONUrl, target,
bestMatchSubpath,
bestMatch, base, true,
true, false, conditions);
if (resolveResult != null) {
return resolveResult;
}
}
}
}
}
throwImportNotDefined(name, packageJSONUrl, base);
}
/**
* @param {URL} url
* @returns {import('internal/modules/esm/package_config.js').PackageType}
*/
function getPackageType(url) {
const packageConfig = getPackageScopeConfig(url);
return packageConfig.type;
}
/**
* @param {string} specifier
* @param {string | URL | undefined} base
* @returns {{ packageName: string, packageSubpath: string, isScoped: boolean }}
*/
function parsePackageName(specifier, base) {
let separatorIndex = StringPrototypeIndexOf(specifier, '/');
let validPackageName = true;
let isScoped = false;
if (specifier[0] === '@') {
isScoped = true;
if (separatorIndex === -1 || specifier.length === 0) {
validPackageName = false;
} else {
separatorIndex = StringPrototypeIndexOf(
specifier, '/', separatorIndex + 1);
}
}
const packageName = separatorIndex === -1 ?
specifier : StringPrototypeSlice(specifier, 0, separatorIndex);
// Package name cannot have leading . and cannot have percent-encoding or
// \\ separators.
if (RegExpPrototypeExec(invalidPackageNameRegEx, packageName) !== null)
validPackageName = false;
if (!validPackageName) {
throw new ERR_INVALID_MODULE_SPECIFIER(
specifier, 'is not a valid package name', fileURLToPath(base));
}
const packageSubpath = '.' + (separatorIndex === -1 ? '' :
StringPrototypeSlice(specifier, separatorIndex));
return { packageName, packageSubpath, isScoped };
}
/**
* @param {string} specifier
* @param {string | URL | undefined} base
* @param {Set<string>} conditions
* @returns {resolved: URL, format? : string}
*/
function packageResolve(specifier, base, conditions) {
if (BuiltinModule.canBeRequiredByUsers(specifier) &&
BuiltinModule.canBeRequiredWithoutScheme(specifier)) {
return new URL('node:' + specifier);
}
const { packageName, packageSubpath, isScoped } =
parsePackageName(specifier, base);
// ResolveSelf
const packageConfig = getPackageScopeConfig(base);
if (packageConfig.exists) {
const packageJSONUrl = pathToFileURL(packageConfig.pjsonPath);
if (packageConfig.name === packageName &&
packageConfig.exports !== undefined && packageConfig.exports !== null) {
return packageExportsResolve(
packageJSONUrl, packageSubpath, packageConfig, base, conditions);
}
}
let packageJSONUrl =
new URL('./node_modules/' + packageName + '/package.json', base);
let packageJSONPath = fileURLToPath(packageJSONUrl);
let lastPath;
do {
const stat = tryStatSync(StringPrototypeSlice(packageJSONPath, 0,
packageJSONPath.length - 13));
if (!stat.isDirectory()) {
lastPath = packageJSONPath;
packageJSONUrl = new URL((isScoped ?
'../../../../node_modules/' : '../../../node_modules/') +
packageName + '/package.json', packageJSONUrl);
packageJSONPath = fileURLToPath(packageJSONUrl);
continue;
}
// Package match.
const packageConfig = getPackageConfig(packageJSONPath, specifier, base);
if (packageConfig.exports !== undefined && packageConfig.exports !== null) {
return packageExportsResolve(
packageJSONUrl, packageSubpath, packageConfig, base, conditions);
}
if (packageSubpath === '.') {
return legacyMainResolve(
packageJSONUrl,
packageConfig,
base
);
}
return new URL(packageSubpath, packageJSONUrl);
// Cross-platform root check.
} while (packageJSONPath.length !== lastPath.length);
// eslint can't handle the above code.
// eslint-disable-next-line no-unreachable
throw new ERR_MODULE_NOT_FOUND(packageName, fileURLToPath(base));
}
/**
* @param {string} specifier
* @returns {boolean}
*/
function isBareSpecifier(specifier) {
return specifier[0] && specifier[0] !== '/' && specifier[0] !== '.';
}
function isRelativeSpecifier(specifier) {
if (specifier[0] === '.') {
if (specifier.length === 1 || specifier[1] === '/') return true;
if (specifier[1] === '.') {
if (specifier.length === 2 || specifier[2] === '/') return true;
}
}
return false;
}
function shouldBeTreatedAsRelativeOrAbsolutePath(specifier) {
if (specifier === '') return false;
if (specifier[0] === '/') return true;
return isRelativeSpecifier(specifier);
}
/**
* @param {string} specifier
* @param {string | URL | undefined} base
* @param {Set<string>} conditions
* @param {boolean} preserveSymlinks
* @returns {url: URL, format?: string}
*/
function moduleResolve(specifier, base, conditions, preserveSymlinks) {
const isRemote = base.protocol === 'http:' ||
base.protocol === 'https:';
// Order swapped from spec for minor perf gain.
// Ok since relative URLs cannot parse as URLs.
let resolved;
if (shouldBeTreatedAsRelativeOrAbsolutePath(specifier)) {
resolved = new URL(specifier, base);
} else if (!isRemote && specifier[0] === '#') {
resolved = packageImportsResolve(specifier, base, conditions);
} else {
try {
resolved = new URL(specifier);
} catch {
if (!isRemote) {
resolved = packageResolve(specifier, base, conditions);
}
}
}
if (resolved.protocol !== 'file:') {
return resolved;
}
return finalizeResolution(resolved, base, preserveSymlinks);
}
/**
* Try to resolve an import as a CommonJS module
* @param {string} specifier
* @param {string} parentURL
* @returns {boolean|string}
*/
function resolveAsCommonJS(specifier, parentURL) {
try {
const parent = fileURLToPath(parentURL);
const tmpModule = new CJSModule(parent, null);
tmpModule.paths = CJSModule._nodeModulePaths(parent);
let found = CJSModule._resolveFilename(specifier, tmpModule, false);
// If it is a relative specifier return the relative path
// to the parent
if (isRelativeSpecifier(specifier)) {
found = relative(parent, found);
// Add '.separator if the path does not start with '..separator'
// This should be a safe assumption because when loading
// esm modules there should be always a file specified so
// there should not be a specifier like '..' or '.'
if (!StringPrototypeStartsWith(found, `..${sep}`)) {
found = `.${sep}${found}`;
}
} else if (isBareSpecifier(specifier)) {
// If it is a bare specifier return the relative path within the
// module
const pkg = StringPrototypeSplit(specifier, '/')[0];
const index = StringPrototypeIndexOf(found, pkg);
if (index !== -1) {
found = StringPrototypeSlice(found, index);
}
}
// Normalize the path separator to give a valid suggestion
// on Windows
if (process.platform === 'win32') {
found = RegExpPrototypeSymbolReplace(new RegExp(`\\${sep}`, 'g'),
found, '/');
}
return found;
} catch {
return false;
}
}
// TODO(@JakobJingleheimer): de-dupe `specifier` & `parsed`
function checkIfDisallowedImport(specifier, parsed, parsedParentURL) {
if (parsedParentURL) {
if (
parsedParentURL.protocol === 'http:' ||
parsedParentURL.protocol === 'https:'
) {
if (shouldBeTreatedAsRelativeOrAbsolutePath(specifier)) {
// data: and blob: disallowed due to allowing file: access via
// indirection
if (parsed &&
parsed.protocol !== 'https:' &&
parsed.protocol !== 'http:'
) {
throw new ERR_NETWORK_IMPORT_DISALLOWED(
specifier,
parsedParentURL,
'remote imports cannot import from a local location.'
);
}
return { url: parsed.href };
}
if (BuiltinModule.canBeRequiredByUsers(specifier) &&
BuiltinModule.canBeRequiredWithoutScheme(specifier)) {
throw new ERR_NETWORK_IMPORT_DISALLOWED(
specifier,
parsedParentURL,
'remote imports cannot import from a local location.'
);
}
throw new ERR_NETWORK_IMPORT_DISALLOWED(
specifier,
parsedParentURL,
'only relative and absolute specifiers are supported.'
);
}
}
}
function throwIfUnsupportedURLProtocol(url) {
if (url.protocol !== 'file:' && url.protocol !== 'data:' &&
url.protocol !== 'node:') {
throw new ERR_UNSUPPORTED_ESM_URL_SCHEME(url);
}
}
function throwIfUnsupportedURLScheme(parsed, experimentalNetworkImports) {
if (
parsed &&
parsed.protocol !== 'file:' &&
parsed.protocol !== 'data:' &&
(
!experimentalNetworkImports ||
(
parsed.protocol !== 'https:' &&
parsed.protocol !== 'http:'
)
)
) {
throw new ERR_UNSUPPORTED_ESM_URL_SCHEME(parsed, ArrayPrototypeConcat(
'file',
'data',
experimentalNetworkImports ? ['https', 'http'] : [],
));
}
}
async function defaultResolve(specifier, context = {}) {
let { parentURL, conditions } = context;
if (parentURL && policy?.manifest) {
const redirects = policy.manifest.getDependencyMapper(parentURL);
if (redirects) {
const { resolve, reaction } = redirects;
const destination = resolve(specifier, new SafeSet(conditions));
let missing = true;
if (destination === true) {
missing = false;
} else if (destination) {
const href = destination.href;
return { url: href };
}
if (missing) {
// Prevent network requests from firing if resolution would be banned.
// Network requests can extract data by doing things like putting
// secrets in query params
reaction(new ERR_MANIFEST_DEPENDENCY_MISSING(
parentURL,
specifier,
ArrayPrototypeJoin([...conditions], ', '))
);
}
}
}
let parsedParentURL;
if (parentURL) {
try {
parsedParentURL = new URL(parentURL);
} catch {
// Ignore exception
}
}
let parsed;
try {
if (shouldBeTreatedAsRelativeOrAbsolutePath(specifier)) {
parsed = new URL(specifier, parsedParentURL);
} else {
parsed = new URL(specifier);
}
if (parsed.protocol === 'data:' ||
(experimentalNetworkImports &&
(
parsed.protocol === 'https:' ||
parsed.protocol === 'http:'
)
)
) {
return { url: parsed.href };
}
} catch {
// Ignore exception
}
// There are multiple deep branches that can either throw or return; instead
// of duplicating that deeply nested logic for the possible returns, DRY and
// check for a return. This seems the least gnarly.
const maybeReturn = checkIfDisallowedImport(
specifier,
parsed,
parsedParentURL,
);
if (maybeReturn) return maybeReturn;
// This must come after checkIfDisallowedImport
if (parsed && parsed.protocol === 'node:') return { url: specifier };
throwIfUnsupportedURLScheme(parsed, experimentalNetworkImports);
const isMain = parentURL === undefined;
if (isMain) {
parentURL = pathToFileURL(`${process.cwd()}/`).href;
// This is the initial entry point to the program, and --input-type has
// been passed as an option; but --input-type can only be used with
// --eval, --print or STDIN string input. It is not allowed with file
// input, to avoid user confusion over how expansive the effect of the
// flag should be (i.e. entry point only, package scope surrounding the
// entry point, etc.).
if (typeFlag) throw new ERR_INPUT_TYPE_NOT_ALLOWED();
}
conditions = getConditionsSet(conditions);
let url;
try {
url = moduleResolve(
specifier,
parentURL,
conditions,
isMain ? preserveSymlinksMain : preserveSymlinks
);
} catch (error) {
// Try to give the user a hint of what would have been the
// resolved CommonJS module
if (error.code === 'ERR_MODULE_NOT_FOUND' ||
error.code === 'ERR_UNSUPPORTED_DIR_IMPORT') {
if (StringPrototypeStartsWith(specifier, 'file://')) {
specifier = fileURLToPath(specifier);
}
const found = resolveAsCommonJS(specifier, parentURL);
if (found) {
// Modify the stack and message string to include the hint
const lines = StringPrototypeSplit(error.stack, '\n');
const hint = `Did you mean to import ${found}?`;
error.stack =
ArrayPrototypeShift(lines) + '\n' +
hint + '\n' +
ArrayPrototypeJoin(lines, '\n');
error.message += `\n${hint}`;
}
}
throw error;
}
throwIfUnsupportedURLProtocol(url);
return {
// Do NOT cast `url` to a string: that will work even when there are real
// problems, silencing them
url: url.href,
format: defaultGetFormatWithoutErrors(url, context),
};
}
module.exports = {
DEFAULT_CONDITIONS,
defaultResolve,
encodedSepRegEx,
getPackageScopeConfig,
getPackageType,
packageExportsResolve,
packageImportsResolve,
};
// cycle
const {
defaultGetFormatWithoutErrors,
} = require('internal/modules/esm/get_format');
if (policy) {
const $defaultResolve = defaultResolve;
module.exports.defaultResolve = async function defaultResolve(
specifier,
context
) {
const ret = await $defaultResolve(specifier, context);
// This is a preflight check to avoid data exfiltration by query params etc.
policy.manifest.mightAllow(ret.url, () =>
new ERR_MANIFEST_DEPENDENCY_MISSING(
context.parentURL,
specifier,
context.conditions
)
);
return ret;
};
}
|