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resolve.js
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resolve.js
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'use strict';
const {
ArrayIsArray,
ArrayPrototypeConcat,
ArrayPrototypeJoin,
ArrayPrototypeShift,
JSONParse,
JSONStringify,
ObjectFreeze,
ObjectGetOwnPropertyNames,
ObjectPrototypeHasOwnProperty,
RegExp,
RegExpPrototypeExec,
RegExpPrototypeSymbolReplace,
RegExpPrototypeTest,
SafeMap,
SafeSet,
String,
StringPrototypeEndsWith,
StringPrototypeIncludes,
StringPrototypeIndexOf,
StringPrototypeLastIndexOf,
StringPrototypeSlice,
StringPrototypeSplit,
StringPrototypeStartsWith,
} = primordials;
const internalFS = require('internal/fs/utils');
const { NativeModule } = 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, resolve } = 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 pendingDeprecation = getOptionValue('--pending-deprecation');
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 packageJsonReader = require('internal/modules/package_json_reader');
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);
/**
* @typedef {string | string[] | Record<string, unknown>} Exports
* @typedef {'module' | 'commonjs'} PackageType
* @typedef {{
* pjsonPath: string,
* exports?: ExportConfig,
* name?: string,
* main?: string,
* type?: PackageType,
* }} PackageConfig
*/
const emittedPackageWarnings = new SafeSet();
/**
* @param {string} match
* @param {URL} pjsonUrl
* @param {boolean} isExports
* @param {string | URL | undefined} base
* @returns {void}
*/
function emitFolderMapDeprecation(match, pjsonUrl, isExports, base) {
const pjsonPath = fileURLToPath(pjsonUrl);
if (emittedPackageWarnings.has(pjsonPath + '|' + match))
return;
emittedPackageWarnings.add(pjsonPath + '|' + match);
process.emitWarning(
`Use of deprecated folder mapping "${match}" in the ${isExports ?
'"exports"' : '"imports"'} field module resolution of the package at ${
pjsonPath}${base ? ` imported from ${fileURLToPath(base)}` : ''}.\n` +
`Update this package.json to use a subpath pattern like "${match}*".`,
'DeprecationWarning',
'DEP0148'
);
}
function emitTrailingSlashPatternDeprecation(match, pjsonUrl, isExports, base) {
if (!pendingDeprecation) return;
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 ${
isExports ? '"exports"' : '"imports"'} field module resolution of the ` +
`package at ${pjsonPath}${base ? ` imported from ${fileURLToPath(base)}` :
''}. Mapping specifiers ending in "/" is no longer supported.`,
'DeprecationWarning',
'DEP0155'
);
}
/**
* @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 ${basePath
}.\nDefault "index" lookups for the main are deprecated for ES modules.`,
'DeprecationWarning',
'DEP0151'
);
}
/**
* @param {string[]} [conditions]
* @returns {Set<string>}
*/
function getConditionsSet(conditions) {
if (conditions !== undefined && conditions !== DEFAULT_CONDITIONS) {
if (!ArrayIsArray(conditions)) {
throw new ERR_INVALID_ARG_VALUE('conditions', conditions,
'expected an array');
}
return new SafeSet(conditions);
}
return DEFAULT_CONDITIONS_SET;
}
const realpathCache = new SafeMap();
const packageJSONCache = new SafeMap(); /* string -> PackageConfig */
/**
* @param {string | URL} path
* @returns {import('fs').Stats}
*/
const tryStatSync =
(path) => statSync(path, { throwIfNoEntry: false }) ?? new Stats();
/**
* @param {string} path
* @param {string} specifier
* @param {string | URL | undefined} base
* @returns {PackageConfig}
*/
function getPackageConfig(path, specifier, base) {
const existing = packageJSONCache.get(path);
if (existing !== undefined) {
return existing;
}
const source = packageJsonReader.read(path).string;
if (source === undefined) {
const packageConfig = {
pjsonPath: path,
exists: false,
main: undefined,
name: undefined,
type: 'none',
exports: undefined,
imports: undefined,
};
packageJSONCache.set(path, packageConfig);
return packageConfig;
}
let packageJSON;
try {
packageJSON = JSONParse(source);
} catch (error) {
throw new ERR_INVALID_PACKAGE_CONFIG(
path,
(base ? `"${specifier}" from ` : '') + fileURLToPath(base || specifier),
error.message
);
}
let { imports, main, name, type } = packageJSON;
const { exports } = packageJSON;
if (typeof imports !== 'object' || imports === null) imports = undefined;
if (typeof main !== 'string') main = undefined;
if (typeof name !== 'string') name = undefined;
// Ignore unknown types for forwards compatibility
if (type !== 'module' && type !== 'commonjs') type = 'none';
const packageConfig = {
pjsonPath: path,
exists: true,
main,
name,
type,
exports,
imports,
};
packageJSONCache.set(path, packageConfig);
return packageConfig;
}
/**
* @param {URL | string} resolved
* @returns {PackageConfig}
*/
function getPackageScopeConfig(resolved) {
let packageJSONUrl = new URL('./package.json', resolved);
while (true) {
const packageJSONPath = packageJSONUrl.pathname;
if (StringPrototypeEndsWith(packageJSONPath, 'node_modules/package.json'))
break;
const packageConfig = getPackageConfig(fileURLToPath(packageJSONUrl),
resolved);
if (packageConfig.exists) return packageConfig;
const lastPackageJSONUrl = packageJSONUrl;
packageJSONUrl = new URL('../package.json', packageJSONUrl);
// Terminates at root where ../package.json equals ../../package.json
// (can't just check "/package.json" for Windows support).
if (packageJSONUrl.pathname === lastPackageJSONUrl.pathname) break;
}
const packageJSONPath = fileURLToPath(packageJSONUrl);
const packageConfig = {
pjsonPath: packageJSONPath,
exists: false,
main: undefined,
name: undefined,
type: 'none',
exports: undefined,
imports: undefined,
};
packageJSONCache.set(packageJSONPath, packageConfig);
return packageConfig;
}
/**
* @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(`./${packageConfig.main}/index.node`,
packageJSONUrl)));
else guess = undefined;
if (guess) {
emitLegacyIndexDeprecation(guess, packageJSONUrl, base,
packageConfig.main);
return guess;
}
// Fallthrough.
}
if (fileExists(guess = new URL('./index.js', packageJSONUrl)));
// So fs.
else if (fileExists(guess = new URL('./index.json', packageJSONUrl)));
else if (fileExists(guess = new URL('./index.node', packageJSONUrl)));
else guess = undefined;
if (guess) {
emitLegacyIndexDeprecation(guess, packageJSONUrl, base, packageConfig.main);
return guess;
}
// Not found.
throw new ERR_MODULE_NOT_FOUND(
fileURLToPath(new URL('.', packageJSONUrl)), fileURLToPath(base));
}
/**
* @param {URL} search
* @returns {URL | undefined}
*/
function resolveExtensionsWithTryExactName(search) {
if (fileExists(search)) return search;
return resolveExtensions(search);
}
const extensions = ['.js', '.json', '.node', '.mjs'];
/**
* @param {URL} search
* @returns {URL | undefined}
*/
function resolveExtensions(search) {
for (let i = 0; i < extensions.length; i++) {
const extension = extensions[i];
const guess = new URL(`${search.pathname}${extension}`, search);
if (fileExists(guess)) return guess;
}
return undefined;
}
/**
* @param {URL} search
* @returns {URL | undefined}
*/
function resolveDirectoryEntry(search) {
const dirPath = fileURLToPath(search);
const pkgJsonPath = resolve(dirPath, 'package.json');
if (fileExists(pkgJsonPath)) {
const pkgJson = packageJsonReader.read(pkgJsonPath);
if (pkgJson.containsKeys) {
const { main } = JSONParse(pkgJson.string);
if (main != null) {
const mainUrl = pathToFileURL(resolve(dirPath, main));
return resolveExtensionsWithTryExactName(mainUrl);
}
}
}
return resolveExtensions(new URL('index', search));
}
const encodedSepRegEx = /%2F|%5C/i;
/**
* @param {URL} resolved
* @param {string | URL | undefined} base
* @param {boolean} preserveSymlinks
* @returns {URL | undefined}
*/
function finalizeResolution(resolved, base, preserveSymlinks) {
if (RegExpPrototypeTest(encodedSepRegEx, resolved.pathname))
throw new ERR_INVALID_MODULE_SPECIFIER(
resolved.pathname, 'must not include encoded "/" or "\\" characters',
fileURLToPath(base));
let path = fileURLToPath(resolved);
if (getOptionValue('--experimental-specifier-resolution') === 'node') {
let file = resolveExtensionsWithTryExactName(resolved);
// Directory
if (file === undefined) {
file = StringPrototypeEndsWith(path, '/') ?
(resolveDirectoryEntry(resolved) || resolved) : resolveDirectoryEntry(new URL(`${resolved}/`));
if (file === resolved) return file;
if (file === undefined) {
throw new ERR_MODULE_NOT_FOUND(
resolved.pathname, fileURLToPath(base), 'module');
}
}
path = file;
}
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 | URL} subpath
* @param {URL} packageJSONUrl
* @param {boolean} internal
* @param {string | URL | undefined} base
*/
function throwInvalidSubpath(subpath, packageJSONUrl, internal, base) {
const reason = `request is not a valid subpath for the "${internal ?
'imports' : 'exports'}" resolution of ${fileURLToPath(packageJSONUrl)}`;
throw new ERR_INVALID_MODULE_SPECIFIER(subpath, reason,
base && fileURLToPath(base));
}
function throwInvalidPackageTarget(
subpath, target, packageJSONUrl, internal, base) {
if (typeof target === 'object' && target !== null) {
target = JSONStringify(target, null, '');
} else {
target = `${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))(\\|\/|$)/i;
const invalidPackageNameRegEx = /^\.|%|\\/;
const patternRegEx = /\*/g;
function resolvePackageTargetString(
target, subpath, match, packageJSONUrl, base, pattern, internal, conditions) {
if (subpath !== '' && !pattern && target[target.length - 1] !== '/')
throwInvalidPackageTarget(match, target, packageJSONUrl, internal, base);
if (!StringPrototypeStartsWith(target, './')) {
if (internal && !StringPrototypeStartsWith(target, '../') &&
!StringPrototypeStartsWith(target, '/')) {
let isURL = false;
try {
new URL(target);
isURL = true;
} catch {
// Continue regardless of error.
}
if (!isURL) {
const exportTarget = pattern ?
RegExpPrototypeSymbolReplace(patternRegEx, target, () => subpath) :
target + subpath;
return packageResolve(
exportTarget, packageJSONUrl, conditions);
}
}
throwInvalidPackageTarget(match, target, packageJSONUrl, internal, base);
}
if (RegExpPrototypeTest(invalidSegmentRegEx, StringPrototypeSlice(target, 2)))
throwInvalidPackageTarget(match, target, packageJSONUrl, internal, base);
const resolved = new URL(target, packageJSONUrl);
const resolvedPath = resolved.pathname;
const packagePath = new URL('.', packageJSONUrl).pathname;
if (!StringPrototypeStartsWith(resolvedPath, packagePath))
throwInvalidPackageTarget(match, target, packageJSONUrl, internal, base);
if (subpath === '') return resolved;
if (RegExpPrototypeTest(invalidSegmentRegEx, subpath))
throwInvalidSubpath(match + subpath, packageJSONUrl, internal, base);
if (pattern) {
return new URL(
RegExpPrototypeSymbolReplace(
patternRegEx,
resolved.href,
() => subpath
)
);
}
return new URL(subpath, resolved);
}
/**
* @param {string} key
* @returns {boolean}
*/
function isArrayIndex(key) {
const keyNum = +key;
if (`${keyNum}` !== key) return false;
return keyNum >= 0 && keyNum < 0xFFFF_FFFF;
}
function resolvePackageTarget(packageJSONUrl, target, subpath, packageSubpath,
base, pattern, internal, conditions) {
if (typeof target === 'string') {
return resolvePackageTargetString(
target, subpath, packageSubpath, packageJSONUrl, base, pattern, internal,
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, 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, conditions);
if (resolveResult === undefined)
continue;
return resolveResult;
}
}
return undefined;
} else if (target === null) {
return null;
}
throwInvalidPackageTarget(packageSubpath, target, packageJSONUrl, internal,
base);
}
/**
*
* @param {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 resolved = resolvePackageTarget(
packageJSONUrl, target, '', packageSubpath, base, false, false, conditions
);
if (resolved == null) {
throwExportsNotFound(packageSubpath, packageJSONUrl, base);
}
return { resolved, exact: true };
}
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))) {
if (StringPrototypeEndsWith(packageSubpath, '/'))
emitTrailingSlashPatternDeprecation(packageSubpath, packageJSONUrl,
true, 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);
}
} else if (key[key.length - 1] === '/' &&
StringPrototypeStartsWith(packageSubpath, key) &&
patternKeyCompare(bestMatch, key) === 1) {
bestMatch = key;
bestMatchSubpath = StringPrototypeSlice(packageSubpath, key.length);
}
}
if (bestMatch) {
const target = exports[bestMatch];
const pattern = StringPrototypeIncludes(bestMatch, '*');
const resolved = resolvePackageTarget(
packageJSONUrl,
target,
bestMatchSubpath,
bestMatch,
base,
pattern,
false,
conditions);
if (resolved == null) {
throwExportsNotFound(packageSubpath, packageJSONUrl, base);
}
if (!pattern) {
emitFolderMapDeprecation(bestMatch, packageJSONUrl, true, base);
}
return { resolved, exact: pattern };
}
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, '#/')) {
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, '*') &&
!StringPrototypeEndsWith(name, '/')) {
const resolved = resolvePackageTarget(
packageJSONUrl, imports[name], '', name, base, false, true, conditions
);
if (resolved != null) {
return { resolved, exact: true };
}
} 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);
}
} else if (key[key.length - 1] === '/' &&
StringPrototypeStartsWith(name, key) &&
patternKeyCompare(bestMatch, key) === 1) {
bestMatch = key;
bestMatchSubpath = StringPrototypeSlice(name, key.length);
}
}
if (bestMatch) {
const target = imports[bestMatch];
const pattern = StringPrototypeIncludes(bestMatch, '*');
const resolved = resolvePackageTarget(
packageJSONUrl, target,
bestMatchSubpath, bestMatch,
base, pattern, true,
conditions);
if (resolved !== null) {
if (!pattern)
emitFolderMapDeprecation(bestMatch, packageJSONUrl, false, base);
return { resolved, exact: pattern };
}
}
}
}
}
throwImportNotDefined(name, packageJSONUrl, base);
}
/**
* @param {URL} url
* @returns {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 {URL}
*/
function packageResolve(specifier, base, conditions) {
if (NativeModule.canBeRequiredByUsers(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
).resolved;
}
}
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
).resolved;
}
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}
*/
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;