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import { dirname, normalize, resolve, sep } from "path";
import isBuiltinModule from "../is-builtin-module";
import deepMerge from "deepmerge";
import isModule from "is-module";
import handleDeprecatedOptions from "./deprecated-options";
import resolveImportSpecifiers from "./resolveImportSpecifiers";
import { getMainFields, getPackageName, normalizeInput } from "./util";
import { fileExists } from "./fs";
import nodeFsAdapter from "../node-fs-adapter";
const ES6_BROWSER_EMPTY = "\0node-resolve:empty.js";
const deepFreeze = (object) => {
Object.freeze(object);
for (const value of Object.values(object)) {
if (typeof value === "object" && !Object.isFrozen(value)) {
deepFreeze(value);
}
}
return object;
};
const baseConditions = ["default", "module"];
const baseConditionsEsm = [...baseConditions, "import"];
const baseConditionsCjs = [...baseConditions, "require"];
const defaults = {
dedupe: [],
// It's important that .mjs is listed before .js so that Rollup will interpret npm modules
// which deploy both ESM .mjs and CommonJS .js files as ESM.
extensions: [".mjs", ".js", ".json", ".node"],
resolveOnly: [],
moduleDirectories: ["node_modules"],
modulePaths: [],
ignoreSideEffectsForRoot: false,
// TODO: set to false in next major release or remove
allowExportsFolderMapping: true,
validateImportsExports: true,
ignoreExports: false,
};
export const DEFAULTS = deepFreeze(deepMerge({}, defaults));
export function nodeResolve(opts = {}) {
const { warnings } = handleDeprecatedOptions(opts);
const options = { ...defaults, ...opts };
const {
extensions,
jail,
moduleDirectories,
modulePaths,
ignoreSideEffectsForRoot,
} = options;
const conditionsEsm = [
...baseConditionsEsm,
...(options.exportConditions || []),
];
const conditionsCjs = [
...baseConditionsCjs,
...(options.exportConditions || []),
];
const packageInfoCache = new Map();
const idToPackageInfo = new Map();
const mainFields = getMainFields(options);
const useBrowserOverrides = mainFields.indexOf("browser") !== -1;
const isPreferBuiltinsSet =
options.preferBuiltins === true || options.preferBuiltins === false;
const preferBuiltins = isPreferBuiltinsSet ? options.preferBuiltins : true;
const rootDir = resolve(options.rootDir || process.cwd());
let { dedupe } = options;
let rollupOptions;
Iif (moduleDirectories.some((name) => name.includes("/"))) {
throw new Error(
"`moduleDirectories` option must only contain directory names. If you want to load modules from somewhere not supported by the default module resolution algorithm, see `modulePaths`.",
);
}
Eif (typeof dedupe !== "function") {
dedupe = (importee) =>
options.dedupe.includes(importee) ||
options.dedupe.includes(getPackageName(importee));
}
// creates a function from the patterns to test if a particular module should be bundled.
const allowPatterns = (patterns) => {
const regexPatterns = patterns.map((pattern) => {
if (pattern instanceof RegExp) {
return pattern;
}
const normalized = pattern.replace(/[\\^$*+?.()|[\]{}]/g, "\\$&");
return new RegExp(`^${normalized}$`);
});
return (id) =>
!regexPatterns.length ||
regexPatterns.some((pattern) => pattern.test(id));
};
const resolveOnly =
typeof options.resolveOnly === "function"
? options.resolveOnly
: allowPatterns(options.resolveOnly);
const browserMapCache = new Map();
let preserveSymlinks;
const resolveLikeNode = async (context, importee, importer, custom, fs) => {
// strip query params from import
const [importPath, params] = importee.split("?");
const importSuffix = `${params ? `?${params}` : ""}`;
importee = importPath;
const baseDir = !importer || dedupe(importee) ? rootDir : dirname(importer);
// https://github.com/defunctzombie/package-browser-field-spec
const browser = browserMapCache.get(importer);
Iif (useBrowserOverrides && browser) {
const resolvedImportee = resolve(baseDir, importee);
if (browser[importee] === false || browser[resolvedImportee] === false) {
return { id: ES6_BROWSER_EMPTY };
}
const browserImportee =
(importee[0] !== "." && browser[importee]) ||
browser[resolvedImportee] ||
browser[`${resolvedImportee}.js`] ||
browser[`${resolvedImportee}.json`];
if (browserImportee) {
importee = browserImportee;
}
}
const parts = importee.split(/[/\\]/);
let id = parts.shift();
let isRelativeImport = false;
Iif (id[0] === "@" && parts.length > 0) {
// scoped packages
id += `/${parts.shift()}`;
} else if (id[0] === ".") {
// an import relative to the parent dir of the importer
id = resolve(baseDir, importee);
isRelativeImport = true;
}
// if it's not a relative import, and it's not requested, reject it.
Iif (!isRelativeImport && !resolveOnly(id)) {
if (normalizeInput(rollupOptions.input).includes(importee)) {
return null;
}
return false;
}
const importSpecifierList = [importee];
Iif (importer === undefined && !importee[0].match(/^\.?\.?\//)) {
// For module graph roots (i.e. when importer is undefined), we
// need to handle 'path fragments` like `foo/bar` that are commonly
// found in rollup config files. If importee doesn't look like a
// relative or absolute path, we make it relative and attempt to
// resolve it.
importSpecifierList.push(`./${importee}`);
}
// TypeScript files may import '.mjs' or '.cjs' to refer to either '.mts' or '.cts'.
// They may also import .js to refer to either .ts or .tsx, and .jsx to refer to .tsx.
if (importer && /\.(ts|mts|cts|tsx)$/.test(importer)) {
for (const [importeeExt, resolvedExt] of [
[".js", ".ts"],
[".js", ".tsx"],
[".jsx", ".tsx"],
[".mjs", ".mts"],
[".cjs", ".cts"],
]) {
Iif (
importee.endsWith(importeeExt) &&
extensions.includes(resolvedExt)
) {
importSpecifierList.push(
importee.slice(0, -importeeExt.length) + resolvedExt,
);
}
}
}
const warn = (...args) => context.warn(...args);
const isRequire =
custom && custom["node-resolve"] && custom["node-resolve"].isRequire;
const exportConditions = isRequire ? conditionsCjs : conditionsEsm;
if (useBrowserOverrides && !exportConditions.includes("browser"))
exportConditions.push("browser");
const resolvedWithoutBuiltins = await resolveImportSpecifiers({
importer,
importSpecifierList,
exportConditions,
warn,
packageInfoCache,
extensions,
mainFields,
preserveSymlinks,
useBrowserOverrides,
baseDir,
moduleDirectories,
modulePaths,
rootDir,
ignoreSideEffectsForRoot,
allowExportsFolderMapping: options.allowExportsFolderMapping,
fs,
validateImportsExports: options.validateImportsExports,
ignoreExports: options.ignoreExports,
});
const importeeIsBuiltin = isBuiltinModule(importee);
const resolved =
importeeIsBuiltin && preferBuiltins
? {
packageInfo: undefined,
hasModuleSideEffects: () => null,
hasPackageEntry: true,
packageBrowserField: false,
}
: resolvedWithoutBuiltins;
Iif (!resolved) {
return null;
}
const {
packageInfo,
hasModuleSideEffects,
hasPackageEntry,
packageBrowserField,
} = resolved;
let { location } = resolved;
Iif (packageBrowserField) {
if (Object.prototype.hasOwnProperty.call(packageBrowserField, location)) {
if (!packageBrowserField[location]) {
browserMapCache.set(location, packageBrowserField);
return { id: ES6_BROWSER_EMPTY };
}
location = packageBrowserField[location];
}
browserMapCache.set(location, packageBrowserField);
}
Eif (hasPackageEntry && !preserveSymlinks) {
const exists = await fileExists(location, fs);
Eif (exists) {
location = await fs.realpath(location);
}
}
idToPackageInfo.set(location, packageInfo);
Eif (hasPackageEntry) {
Iif (importeeIsBuiltin && preferBuiltins) {
if (
!isPreferBuiltinsSet &&
resolvedWithoutBuiltins &&
resolved !== importee
) {
context.warn(
`preferring built-in module '${importee}' over local alternative at '${resolvedWithoutBuiltins.location}', pass 'preferBuiltins: false' to disable this behavior or 'preferBuiltins: true' to disable this warning`,
);
}
return false;
} else Iif (jail && location.indexOf(normalize(jail.trim(sep))) !== 0) {
return null;
}
}
Iif (options.modulesOnly && (await fileExists(location, fs))) {
const code = await fs.readFile(location, "utf8");
if (isModule(code)) {
return {
id: `${location}${importSuffix}`,
moduleSideEffects: hasModuleSideEffects(location),
};
}
return null;
}
return {
id: `${location}${importSuffix}`,
moduleSideEffects: hasModuleSideEffects(location),
};
};
return {
name: "node-resolve",
version: "1.0.0",
buildStart(buildOptions) {
// validateVersion(this.meta.rollupVersion, peerDependencies.rollup);
rollupOptions = buildOptions;
for (const warning of warnings) {
this.warn(warning);
}
({ preserveSymlinks } = buildOptions);
},
generateBundle() {
// Cleanup tasks
},
resolveId: {
order: "post",
async handler(importee, importer, resolveOptions) {
Iif (importee === ES6_BROWSER_EMPTY) {
return importee;
}
// ignore IDs with null character, these belong to other plugins
Iif (/\0/.test(importee)) return null;
const { custom = {} } = resolveOptions;
const { "node-resolve": { resolved: alreadyResolved } = {} } = custom;
if (alreadyResolved) {
return alreadyResolved;
}
Iif (/\0/.test(importer)) {
importer = undefined;
}
const fs = options.fs || globalThis.__rollupFs || nodeFsAdapter;
const resolved = await resolveLikeNode(
this,
importee,
importer,
custom,
fs,
);
Eif (resolved) {
// This way, plugins may attach additional meta information to the
// resolved id or make it external. We do not skip node-resolve here
// because another plugin might again use `this.resolve` in its
// `resolveId` hook, in which case we want to add the correct
// `moduleSideEffects` information.
const resolvedResolved = await this.resolve(resolved.id, importer, {
...resolveOptions,
skipSelf: false,
custom: {
...custom,
"node-resolve": { ...custom["node-resolve"], resolved, importee },
},
});
Eif (resolvedResolved) {
// Handle plugins that manually make the result external
Iif (resolvedResolved.external) {
return false;
}
// Allow other plugins to take over resolution. Rollup core will not
// change the id if it corresponds to an existing file
Iif (resolvedResolved.id !== resolved.id) {
return resolvedResolved;
}
// Pass on meta information added by other plugins
return { ...resolved, meta: resolvedResolved.meta };
}
}
return resolved;
},
},
load(importee) {
Iif (importee === ES6_BROWSER_EMPTY) {
return "export default {};";
}
return null;
},
getPackageInfoForId(id) {
return idToPackageInfo.get(id);
},
};
}
export default nodeResolve;
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