/opt/canhelp/node_modules/next/dist/esm/build
Edit: /opt/canhelp/node_modules/next/dist/esm/build/handle-externals.js (13623B)
import { defaultOverrides } from '../server/require-hook';
import { BARREL_OPTIMIZATION_PREFIX } from '../shared/lib/constants';
import path from '../shared/lib/isomorphic/path';
import { NODE_BASE_ESM_RESOLVE_OPTIONS, NODE_BASE_RESOLVE_OPTIONS, NODE_ESM_RESOLVE_OPTIONS, NODE_RESOLVE_OPTIONS } from './webpack-config';
import { isWebpackBundledLayer, shouldUseReactServerCondition } from './utils';
import { normalizePathSep } from '../shared/lib/page-path/normalize-path-sep';
const reactPackagesRegex = /^(react|react-dom|react-server-dom-webpack)($|\/)/;
const pathSeparators = '[/\\\\]';
const optionalEsmPart = `((${pathSeparators}esm)?${pathSeparators})`;
const externalFileEnd = '(\\.external(\\.js)?)$';
const nextDist = `next${pathSeparators}dist`;
const externalPattern = new RegExp(`${nextDist}${optionalEsmPart}.*${externalFileEnd}`);
const nodeModulesRegex = /node_modules[/\\].*\.[mc]?js$/;
export function isResourceInPackages(resource, packageNames, packageDirMapping) {
if (!packageNames) return false;
return packageNames.some((p)=>packageDirMapping && packageDirMapping.has(p) ? resource.startsWith(packageDirMapping.get(p) + path.sep) : resource.includes(path.sep + path.join('node_modules', p.replace(/\//g, path.sep)) + path.sep));
}
export async function resolveExternal(dir, esmExternalsConfig, context, request, isEsmRequested, getResolve, isLocalCallback, baseResolveCheck = true, esmResolveOptions = NODE_ESM_RESOLVE_OPTIONS, nodeResolveOptions = NODE_RESOLVE_OPTIONS, baseEsmResolveOptions = NODE_BASE_ESM_RESOLVE_OPTIONS, baseResolveOptions = NODE_BASE_RESOLVE_OPTIONS) {
const esmExternals = !!esmExternalsConfig;
const looseEsmExternals = esmExternalsConfig === 'loose';
let res = null;
let isEsm = false;
const preferEsmOptions = esmExternals && isEsmRequested ? [
true,
false
] : [
false
];
for (const preferEsm of preferEsmOptions){
const resolveOptions = preferEsm ? esmResolveOptions : nodeResolveOptions;
const resolve = getResolve(resolveOptions);
// Resolve the import with the webpack provided context, this
// ensures we're resolving the correct version when multiple
// exist.
try {
;
[res, isEsm] = await resolve(context, request);
} catch (err) {
res = null;
}
if (!res) {
continue;
}
// ESM externals can only be imported (and not required).
// Make an exception in loose mode.
if (!isEsmRequested && isEsm && !looseEsmExternals) {
continue;
}
if (isLocalCallback) {
return {
localRes: isLocalCallback(res)
};
}
// Bundled Node.js code is relocated without its node_modules tree.
// This means we need to make sure its request resolves to the same
// package that'll be available at runtime. If it's not identical,
// we need to bundle the code (even if it _should_ be external).
if (baseResolveCheck) {
let baseRes;
let baseIsEsm;
try {
const baseResolve = getResolve(isEsm ? baseEsmResolveOptions : baseResolveOptions);
[baseRes, baseIsEsm] = await baseResolve(dir, request);
} catch (err) {
baseRes = null;
baseIsEsm = false;
}
// Same as above: if the package, when required from the root,
// would be different from what the real resolution would use, we
// cannot externalize it.
// if request is pointing to a symlink it could point to the same file,
// the resolver will resolve symlinks so this is handled
if (baseRes !== res || isEsm !== baseIsEsm) {
res = null;
continue;
}
}
break;
}
return {
res,
isEsm
};
}
export function makeExternalHandler({ config, optOutBundlingPackageRegex, transpiledPackages, dir }) {
var _config_experimental;
let resolvedExternalPackageDirs;
const looseEsmExternals = ((_config_experimental = config.experimental) == null ? void 0 : _config_experimental.esmExternals) === 'loose';
return async function handleExternals(context, request, dependencyType, layer, getResolve) {
// We need to externalize internal requests for files intended to
// not be bundled.
const isLocal = request.startsWith('.') || // Always check for unix-style path, as webpack sometimes
// normalizes as posix.
path.posix.isAbsolute(request) || // When on Windows, we also want to check for Windows-specific
// absolute paths.
process.platform === 'win32' && path.win32.isAbsolute(request);
// make sure import "next" shows a warning when imported
// in pages/components
if (request === 'next') {
return `commonjs next/dist/lib/import-next-warning`;
}
const isAppLayer = isWebpackBundledLayer(layer);
// Relative requires don't need custom resolution, because they
// are relative to requests we've already resolved here.
// Absolute requires (require('/foo')) are extremely uncommon, but
// also have no need for customization as they're already resolved.
if (!isLocal) {
if (/^next$/.test(request)) {
return `commonjs ${request}`;
}
if (reactPackagesRegex.test(request) && !isAppLayer) {
return `commonjs ${request}`;
}
// Handle Bun builtins as external modules
if (request === 'bun' || request.startsWith('bun:')) {
return `commonjs ${request}`;
}
const notExternalModules = /^(?:private-next-pages\/|next\/(?:dist\/pages\/|(?:app|cache|document|link|form|head|image|legacy\/image|constants|dynamic|script|navigation|headers|router|compat\/router|server)$)|string-hash|private-next-rsc-action-validate|private-next-rsc-action-client-wrapper|private-next-rsc-server-reference|private-next-rsc-cache-wrapper|private-next-rsc-track-dynamic-import$)/;
if (notExternalModules.test(request)) {
return;
}
}
// @swc/helpers should not be external as it would
// require hoisting the package which we can't rely on
if (request.includes('@swc/helpers')) {
return;
}
// BARREL_OPTIMIZATION_PREFIX is a special marker that tells Next.js to
// optimize the import by removing unused exports. This has to be compiled.
if (request.startsWith(BARREL_OPTIMIZATION_PREFIX)) {
return;
}
// When in esm externals mode, and using import, we resolve with
// ESM resolving options.
// Also disable esm request when appDir is enabled
const isEsmRequested = dependencyType === 'esm';
// Don't bundle @vercel/og nodejs bundle for nodejs runtime.
// TODO-APP: bundle route.js with different layer that externals common node_module deps.
// Make sure @vercel/og is loaded as ESM for Node.js runtime
if (shouldUseReactServerCondition(layer) && request === 'next/dist/compiled/@vercel/og/index.node.js') {
return `module ${request}`;
}
// Specific Next.js imports that should remain external
// TODO-APP: Investigate if we can remove this.
if (request.startsWith('next/dist/')) {
// Non external that needs to be transpiled
// Image loader needs to be transpiled
if (/^next[\\/]dist[\\/]shared[\\/]lib[\\/]image-loader/.test(request)) {
return;
}
if (/^next[\\/]dist[\\/]compiled[\\/]next-server/.test(request)) {
return `commonjs ${request}`;
}
if (/^next[\\/]dist[\\/]shared[\\/](?!lib[\\/]router[\\/]router)/.test(request) || /^next[\\/]dist[\\/]compiled[\\/].*\.c?js$/.test(request)) {
return `commonjs ${request}`;
}
if (/^next[\\/]dist[\\/]esm[\\/]shared[\\/](?!lib[\\/]router[\\/]router)/.test(request) || /^next[\\/]dist[\\/]compiled[\\/].*\.mjs$/.test(request)) {
return `module ${request}`;
}
return resolveNextExternal(request);
}
// TODO-APP: Let's avoid this resolve call as much as possible, and eventually get rid of it.
const resolveResult = await resolveExternal(dir, config.experimental.esmExternals, context, request, isEsmRequested, getResolve, isLocal ? resolveNextExternal : undefined);
if ('localRes' in resolveResult) {
return resolveResult.localRes;
}
// Forcedly resolve the styled-jsx installed by next.js,
// since `resolveExternal` cannot find the styled-jsx dep with pnpm
if (request === 'styled-jsx/style') {
resolveResult.res = defaultOverrides['styled-jsx/style'];
}
const { res, isEsm } = resolveResult;
// If the request cannot be resolved we need to have
// webpack "bundle" it so it surfaces the not found error.
if (!res) {
return;
}
const isOptOutBundling = optOutBundlingPackageRegex.test(res);
// Apply bundling rules to all app layers.
// Since handleExternals only handle the server layers, we don't need to exclude client here
if (!isOptOutBundling && isAppLayer) {
return;
}
// ESM externals can only be imported (and not required).
// Make an exception in loose mode.
if (!isEsmRequested && isEsm && !looseEsmExternals && !isLocal) {
throw Object.defineProperty(new Error(`ESM packages (${request}) need to be imported. Use 'import' to reference the package instead. https://nextjs.org/docs/messages/import-esm-externals`), "__NEXT_ERROR_CODE", {
value: "E310",
enumerable: false,
configurable: true
});
}
const externalType = isEsm ? 'module' : 'commonjs';
// Default pages have to be transpiled
if (// This is the @babel/plugin-transform-runtime "helpers: true" option
/node_modules[/\\]@babel[/\\]runtime[/\\]/.test(res)) {
return;
}
// Webpack itself has to be compiled because it doesn't always use module relative paths
if (/node_modules[/\\]webpack/.test(res) || /node_modules[/\\]css-loader/.test(res)) {
return;
}
// If a package should be transpiled by Next.js, we skip making it external.
// It doesn't matter what the extension is, as we'll transpile it anyway.
if (transpiledPackages && !resolvedExternalPackageDirs) {
resolvedExternalPackageDirs = new Map();
// We need to resolve all the external package dirs initially.
for (const pkg of transpiledPackages){
const pkgRes = await resolveExternal(dir, config.experimental.esmExternals, context, pkg + '/package.json', isEsmRequested, getResolve, isLocal ? resolveNextExternal : undefined);
if (pkgRes.res) {
resolvedExternalPackageDirs.set(pkg, path.dirname(pkgRes.res));
}
}
}
const resolvedBundlingOptOutRes = resolveBundlingOptOutPackages({
resolvedRes: res,
config,
resolvedExternalPackageDirs,
isAppLayer,
externalType,
isOptOutBundling,
request,
transpiledPackages
});
if (resolvedBundlingOptOutRes) {
return resolvedBundlingOptOutRes;
}
// if here, we default to bundling the file
return;
};
}
function resolveBundlingOptOutPackages({ resolvedRes, config, resolvedExternalPackageDirs, isAppLayer, externalType, isOptOutBundling, request, transpiledPackages }) {
if (nodeModulesRegex.test(resolvedRes)) {
const shouldBundlePages = !isAppLayer && config.bundlePagesRouterDependencies && !isOptOutBundling;
const shouldBeBundled = shouldBundlePages || isResourceInPackages(resolvedRes, transpiledPackages, resolvedExternalPackageDirs);
if (!shouldBeBundled) {
return `${externalType} ${request}` // Externalize if not bundled or opted out
;
}
}
}
/**
* @param localRes the full path to the file
* @returns the externalized path
* @description returns an externalized path if the file is a Next.js file and ends with either `.shared-runtime.js` or `.external.js`
* This is used to ensure that files used across the rendering runtime(s) and the user code are one and the same. The logic in this function
* will rewrite the require to the correct bundle location depending on the layer at which the file is being used.
*/ function resolveNextExternal(localRes) {
const isExternal = externalPattern.test(localRes);
// if the file ends with .external, we need to make it a commonjs require in all cases
// this is used mainly to share the async local storage across the routing, rendering and user layers.
if (isExternal) {
// it's important we return the path that starts with `next/dist/` here instead of the absolute path
// otherwise NFT will get tripped up
return `commonjs ${normalizePathSep(localRes.replace(/.*?next[/\\]dist/, 'next/dist'))}`;
}
}
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