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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const versions = require("process").versions;
const Resolver = require("./Resolver");
const { getType, PathType } = require("./util/path");
const SyncAsyncFileSystemDecorator = require("./SyncAsyncFileSystemDecorator");
const AliasFieldPlugin = require("./AliasFieldPlugin");
const AliasPlugin = require("./AliasPlugin");
const AppendPlugin = require("./AppendPlugin");
const ConditionalPlugin = require("./ConditionalPlugin");
const DescriptionFilePlugin = require("./DescriptionFilePlugin");
const DirectoryExistsPlugin = require("./DirectoryExistsPlugin");
const ExportsFieldPlugin = require("./ExportsFieldPlugin");
const FileExistsPlugin = require("./FileExistsPlugin");
const ImportsFieldPlugin = require("./ImportsFieldPlugin");
const JoinRequestPartPlugin = require("./JoinRequestPartPlugin");
const JoinRequestPlugin = require("./JoinRequestPlugin");
const MainFieldPlugin = require("./MainFieldPlugin");
const ModulesInHierachicDirectoriesPlugin = require("./ModulesInHierachicDirectoriesPlugin");
const ModulesInRootPlugin = require("./ModulesInRootPlugin");
const NextPlugin = require("./NextPlugin");
const ParsePlugin = require("./ParsePlugin");
const PnpPlugin = require("./PnpPlugin");
const RestrictionsPlugin = require("./RestrictionsPlugin");
const ResultPlugin = require("./ResultPlugin");
const RootsPlugin = require("./RootsPlugin");
const SelfReferencePlugin = require("./SelfReferencePlugin");
const SymlinkPlugin = require("./SymlinkPlugin");
const TryNextPlugin = require("./TryNextPlugin");
const UnsafeCachePlugin = require("./UnsafeCachePlugin");
const UseFilePlugin = require("./UseFilePlugin");
/** @typedef {import("./AliasPlugin").AliasOption} AliasOptionEntry */
/** @typedef {import("./PnpPlugin").PnpApiImpl} PnpApi */
/** @typedef {import("./Resolver").FileSystem} FileSystem */
/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
/** @typedef {import("./Resolver").SyncFileSystem} SyncFileSystem */
/** @typedef {string|string[]|false} AliasOptionNewRequest */
/** @typedef {{[k: string]: AliasOptionNewRequest}} AliasOptions */
/** @typedef {{apply: function(Resolver): void} | function(this: Resolver, Resolver): void} Plugin */
/**
* @typedef {Object} UserResolveOptions
* @property {(AliasOptions | AliasOptionEntry[])=} alias A list of module alias configurations or an object which maps key to value
* @property {(AliasOptions | AliasOptionEntry[])=} fallback A list of module alias configurations or an object which maps key to value, applied only after modules option
* @property {(string | string[])[]=} aliasFields A list of alias fields in description files
* @property {(function(ResolveRequest): boolean)=} cachePredicate A function which decides whether a request should be cached or not. An object is passed with at least `path` and `request` properties.
* @property {boolean=} cacheWithContext Whether or not the unsafeCache should include request context as part of the cache key.
* @property {string[]=} descriptionFiles A list of description files to read from
* @property {string[]=} conditionNames A list of exports field condition names.
* @property {boolean=} enforceExtension Enforce that a extension from extensions must be used
* @property {(string | string[])[]=} exportsFields A list of exports fields in description files
* @property {(string | string[])[]=} importsFields A list of imports fields in description files
* @property {string[]=} extensions A list of extensions which should be tried for files
* @property {FileSystem} fileSystem The file system which should be used
* @property {(object | boolean)=} unsafeCache Use this cache object to unsafely cache the successful requests
* @property {boolean=} symlinks Resolve symlinks to their symlinked location
* @property {Resolver=} resolver A prepared Resolver to which the plugins are attached
* @property {string[] | string=} modules A list of directories to resolve modules from, can be absolute path or folder name
* @property {(string | string[] | {name: string | string[], forceRelative: boolean})[]=} mainFields A list of main fields in description files
* @property {string[]=} mainFiles A list of main files in directories
* @property {Plugin[]=} plugins A list of additional resolve plugins which should be applied
* @property {PnpApi | null=} pnpApi A PnP API that should be used - null is "never", undefined is "auto"
* @property {string[]=} roots A list of root paths
* @property {boolean=} fullySpecified The request is already fully specified and no extensions or directories are resolved for it
* @property {boolean=} resolveToContext Resolve to a context instead of a file
* @property {(string|RegExp)[]=} restrictions A list of resolve restrictions
* @property {boolean=} useSyncFileSystemCalls Use only the sync constiants of the file system calls
* @property {boolean=} preferRelative Prefer to resolve module requests as relative requests before falling back to modules
* @property {boolean=} preferAbsolute Prefer to resolve server-relative urls as absolute paths before falling back to resolve in roots
*/
/**
* @typedef {Object} ResolveOptions
* @property {AliasOptionEntry[]} alias
* @property {AliasOptionEntry[]} fallback
* @property {Set<string | string[]>} aliasFields
* @property {(function(ResolveRequest): boolean)} cachePredicate
* @property {boolean} cacheWithContext
* @property {Set<string>} conditionNames A list of exports field condition names.
* @property {string[]} descriptionFiles
* @property {boolean} enforceExtension
* @property {Set<string | string[]>} exportsFields
* @property {Set<string | string[]>} importsFields
* @property {Set<string>} extensions
* @property {FileSystem} fileSystem
* @property {object | false} unsafeCache
* @property {boolean} symlinks
* @property {Resolver=} resolver
* @property {Array<string | string[]>} modules
* @property {{name: string[], forceRelative: boolean}[]} mainFields
* @property {Set<string>} mainFiles
* @property {Plugin[]} plugins
* @property {PnpApi | null} pnpApi
* @property {Set<string>} roots
* @property {boolean} fullySpecified
* @property {boolean} resolveToContext
* @property {Set<string|RegExp>} restrictions
* @property {boolean} preferRelative
* @property {boolean} preferAbsolute
*/
/**
* @param {PnpApi | null=} option option
* @returns {PnpApi | null} processed option
*/
function processPnpApiOption(option) {
if (
option === undefined &&
/** @type {NodeJS.ProcessVersions & {pnp: string}} */ versions.pnp
) {
// @ts-ignore
return require("pnpapi"); // eslint-disable-line node/no-missing-require
}
return option || null;
}
/**
* @param {AliasOptions | AliasOptionEntry[] | undefined} alias alias
* @returns {AliasOptionEntry[]} normalized aliases
*/
function normalizeAlias(alias) {
return typeof alias === "object" && !Array.isArray(alias) && alias !== null
? Object.keys(alias).map(key => {
/** @type {AliasOptionEntry} */
const obj = { name: key, onlyModule: false, alias: alias[key] };
if (/\$$/.test(key)) {
obj.onlyModule = true;
obj.name = key.substr(0, key.length - 1);
}
return obj;
})
: /** @type {Array<AliasOptionEntry>} */ (alias) || [];
}
/**
* @param {UserResolveOptions} options input options
* @returns {ResolveOptions} output options
*/
function createOptions(options) {
const mainFieldsSet = new Set(options.mainFields || ["main"]);
const mainFields = [];
for (const item of mainFieldsSet) {
if (typeof item === "string") {
mainFields.push({
name: [item],
forceRelative: true
});
} else if (Array.isArray(item)) {
mainFields.push({
name: item,
forceRelative: true
});
} else {
mainFields.push({
name: Array.isArray(item.name) ? item.name : [item.name],
forceRelative: item.forceRelative
});
}
}
return {
alias: normalizeAlias(options.alias),
fallback: normalizeAlias(options.fallback),
aliasFields: new Set(options.aliasFields),
cachePredicate:
options.cachePredicate ||
function () {
return true;
},
cacheWithContext:
typeof options.cacheWithContext !== "undefined"
? options.cacheWithContext
: true,
exportsFields: new Set(options.exportsFields || ["exports"]),
importsFields: new Set(options.importsFields || ["imports"]),
conditionNames: new Set(options.conditionNames),
descriptionFiles: Array.from(
new Set(options.descriptionFiles || ["package.json"])
),
enforceExtension:
options.enforceExtension === undefined
? options.extensions && options.extensions.includes("")
? true
: false
: options.enforceExtension,
extensions: new Set(options.extensions || [".js", ".json", ".node"]),
fileSystem: options.useSyncFileSystemCalls
? new SyncAsyncFileSystemDecorator(
/** @type {SyncFileSystem} */ (
/** @type {unknown} */ (options.fileSystem)
)
)
: options.fileSystem,
unsafeCache:
options.unsafeCache && typeof options.unsafeCache !== "object"
? {}
: options.unsafeCache || false,
symlinks: typeof options.symlinks !== "undefined" ? options.symlinks : true,
resolver: options.resolver,
modules: mergeFilteredToArray(
Array.isArray(options.modules)
? options.modules
: options.modules
? [options.modules]
: ["node_modules"],
item => {
const type = getType(item);
return type === PathType.Normal || type === PathType.Relative;
}
),
mainFields,
mainFiles: new Set(options.mainFiles || ["index"]),
plugins: options.plugins || [],
pnpApi: processPnpApiOption(options.pnpApi),
roots: new Set(options.roots || undefined),
fullySpecified: options.fullySpecified || false,
resolveToContext: options.resolveToContext || false,
preferRelative: options.preferRelative || false,
preferAbsolute: options.preferAbsolute || false,
restrictions: new Set(options.restrictions)
};
}
/**
* @param {UserResolveOptions} options resolve options
* @returns {Resolver} created resolver
*/
exports.createResolver = function (options) {
const normalizedOptions = createOptions(options);
const {
alias,
fallback,
aliasFields,
cachePredicate,
cacheWithContext,
conditionNames,
descriptionFiles,
enforceExtension,
exportsFields,
importsFields,
extensions,
fileSystem,
fullySpecified,
mainFields,
mainFiles,
modules,
plugins: userPlugins,
pnpApi,
resolveToContext,
preferRelative,
preferAbsolute,
symlinks,
unsafeCache,
resolver: customResolver,
restrictions,
roots
} = normalizedOptions;
const plugins = userPlugins.slice();
const resolver = customResolver
? customResolver
: new Resolver(fileSystem, normalizedOptions);
//// pipeline ////
resolver.ensureHook("resolve");
resolver.ensureHook("internalResolve");
resolver.ensureHook("newInteralResolve");
resolver.ensureHook("parsedResolve");
resolver.ensureHook("describedResolve");
resolver.ensureHook("internal");
resolver.ensureHook("rawModule");
resolver.ensureHook("module");
resolver.ensureHook("resolveAsModule");
resolver.ensureHook("undescribedResolveInPackage");
resolver.ensureHook("resolveInPackage");
resolver.ensureHook("resolveInExistingDirectory");
resolver.ensureHook("relative");
resolver.ensureHook("describedRelative");
resolver.ensureHook("directory");
resolver.ensureHook("undescribedExistingDirectory");
resolver.ensureHook("existingDirectory");
resolver.ensureHook("undescribedRawFile");
resolver.ensureHook("rawFile");
resolver.ensureHook("file");
resolver.ensureHook("finalFile");
resolver.ensureHook("existingFile");
resolver.ensureHook("resolved");
// resolve
for (const { source, resolveOptions } of [
{ source: "resolve", resolveOptions: { fullySpecified } },
{ source: "internal-resolve", resolveOptions: { fullySpecified: false } }
]) {
if (unsafeCache) {
plugins.push(
new UnsafeCachePlugin(
source,
cachePredicate,
unsafeCache,
cacheWithContext,
`new-${source}`
)
);
plugins.push(
new ParsePlugin(`new-${source}`, resolveOptions, "parsed-resolve")
);
} else {
plugins.push(new ParsePlugin(source, resolveOptions, "parsed-resolve"));
}
}
// parsed-resolve
plugins.push(
new DescriptionFilePlugin(
"parsed-resolve",
descriptionFiles,
false,
"described-resolve"
)
);
plugins.push(new NextPlugin("after-parsed-resolve", "described-resolve"));
// described-resolve
plugins.push(new NextPlugin("described-resolve", "normal-resolve"));
if (fallback.length > 0) {
plugins.push(
new AliasPlugin("described-resolve", fallback, "internal-resolve")
);
}
// normal-resolve
if (alias.length > 0)
plugins.push(new AliasPlugin("normal-resolve", alias, "internal-resolve"));
aliasFields.forEach(item => {
plugins.push(
new AliasFieldPlugin("normal-resolve", item, "internal-resolve")
);
});
if (preferRelative) {
plugins.push(new JoinRequestPlugin("after-normal-resolve", "relative"));
}
plugins.push(
new ConditionalPlugin(
"after-normal-resolve",
{ module: true },
"resolve as module",
false,
"raw-module"
)
);
plugins.push(
new ConditionalPlugin(
"after-normal-resolve",
{ internal: true },
"resolve as internal import",
false,
"internal"
)
);
if (preferAbsolute) {
plugins.push(new JoinRequestPlugin("after-normal-resolve", "relative"));
}
if (roots.size > 0) {
plugins.push(new RootsPlugin("after-normal-resolve", roots, "relative"));
}
if (!preferRelative && !preferAbsolute) {
plugins.push(new JoinRequestPlugin("after-normal-resolve", "relative"));
}
// internal
importsFields.forEach(importsField => {
plugins.push(
new ImportsFieldPlugin(
"internal",
conditionNames,
importsField,
"relative",
"internal-resolve"
)
);
});
// raw-module
exportsFields.forEach(exportsField => {
plugins.push(
new SelfReferencePlugin("raw-module", exportsField, "resolve-as-module")
);
});
modules.forEach(item => {
if (Array.isArray(item)) {
if (item.includes("node_modules") && pnpApi) {
plugins.push(
new ModulesInHierachicDirectoriesPlugin(
"raw-module",
item.filter(i => i !== "node_modules"),
"module"
)
);
plugins.push(
new PnpPlugin("raw-module", pnpApi, "undescribed-resolve-in-package")
);
} else {
plugins.push(
new ModulesInHierachicDirectoriesPlugin("raw-module", item, "module")
);
}
} else {
plugins.push(new ModulesInRootPlugin("raw-module", item, "module"));
}
});
// module
plugins.push(new JoinRequestPartPlugin("module", "resolve-as-module"));
// resolve-as-module
if (!resolveToContext) {
plugins.push(
new ConditionalPlugin(
"resolve-as-module",
{ directory: false, request: "." },
"single file module",
true,
"undescribed-raw-file"
)
);
}
plugins.push(
new DirectoryExistsPlugin(
"resolve-as-module",
"undescribed-resolve-in-package"
)
);
// undescribed-resolve-in-package
plugins.push(
new DescriptionFilePlugin(
"undescribed-resolve-in-package",
descriptionFiles,
false,
"resolve-in-package"
)
);
plugins.push(
new NextPlugin("after-undescribed-resolve-in-package", "resolve-in-package")
);
// resolve-in-package
exportsFields.forEach(exportsField => {
plugins.push(
new ExportsFieldPlugin(
"resolve-in-package",
conditionNames,
exportsField,
"relative"
)
);
});
plugins.push(
new NextPlugin("resolve-in-package", "resolve-in-existing-directory")
);
// resolve-in-existing-directory
plugins.push(
new JoinRequestPlugin("resolve-in-existing-directory", "relative")
);
// relative
plugins.push(
new DescriptionFilePlugin(
"relative",
descriptionFiles,
true,
"described-relative"
)
);
plugins.push(new NextPlugin("after-relative", "described-relative"));
// described-relative
if (resolveToContext) {
plugins.push(new NextPlugin("described-relative", "directory"));
} else {
plugins.push(
new ConditionalPlugin(
"described-relative",
{ directory: false },
null,
true,
"raw-file"
)
);
plugins.push(
new ConditionalPlugin(
"described-relative",
{ fullySpecified: false },
"as directory",
true,
"directory"
)
);
}
// directory
plugins.push(
new DirectoryExistsPlugin("directory", "undescribed-existing-directory")
);
if (resolveToContext) {
// undescribed-existing-directory
plugins.push(new NextPlugin("undescribed-existing-directory", "resolved"));
} else {
// undescribed-existing-directory
plugins.push(
new DescriptionFilePlugin(
"undescribed-existing-directory",
descriptionFiles,
false,
"existing-directory"
)
);
mainFiles.forEach(item => {
plugins.push(
new UseFilePlugin(
"undescribed-existing-directory",
item,
"undescribed-raw-file"
)
);
});
// described-existing-directory
mainFields.forEach(item => {
plugins.push(
new MainFieldPlugin(
"existing-directory",
item,
"resolve-in-existing-directory"
)
);
});
mainFiles.forEach(item => {
plugins.push(
new UseFilePlugin("existing-directory", item, "undescribed-raw-file")
);
});
// undescribed-raw-file
plugins.push(
new DescriptionFilePlugin(
"undescribed-raw-file",
descriptionFiles,
true,
"raw-file"
)
);
plugins.push(new NextPlugin("after-undescribed-raw-file", "raw-file"));
// raw-file
plugins.push(
new ConditionalPlugin(
"raw-file",
{ fullySpecified: true },
null,
false,
"file"
)
);
if (!enforceExtension) {
plugins.push(new TryNextPlugin("raw-file", "no extension", "file"));
}
extensions.forEach(item => {
plugins.push(new AppendPlugin("raw-file", item, "file"));
});
// file
if (alias.length > 0)
plugins.push(new AliasPlugin("file", alias, "internal-resolve"));
aliasFields.forEach(item => {
plugins.push(new AliasFieldPlugin("file", item, "internal-resolve"));
});
plugins.push(new NextPlugin("file", "final-file"));
// final-file
plugins.push(new FileExistsPlugin("final-file", "existing-file"));
// existing-file
if (symlinks)
plugins.push(new SymlinkPlugin("existing-file", "existing-file"));
plugins.push(new NextPlugin("existing-file", "resolved"));
}
// resolved
if (restrictions.size > 0) {
plugins.push(new RestrictionsPlugin(resolver.hooks.resolved, restrictions));
}
plugins.push(new ResultPlugin(resolver.hooks.resolved));
//// RESOLVER ////
for (const plugin of plugins) {
if (typeof plugin === "function") {
plugin.call(resolver, resolver);
} else {
plugin.apply(resolver);
}
}
return resolver;
};
/**
* Merging filtered elements
* @param {string[]} array source array
* @param {function(string): boolean} filter predicate
* @returns {Array<string | string[]>} merge result
*/
function mergeFilteredToArray(array, filter) {
/** @type {Array<string | string[]>} */
const result = [];
const set = new Set(array);
for (const item of set) {
if (filter(item)) {
const lastElement =
result.length > 0 ? result[result.length - 1] : undefined;
if (Array.isArray(lastElement)) {
lastElement.push(item);
} else {
result.push([item]);
}
} else {
result.push(item);
}
}
return result;
}