Initial boiler plate project

node_modules/next/dist/esm/build/webpack/plugins/middleware-plugin.js

@@ -0,0 +1,521 @@
+import { getNamedMiddlewareRegex } from "../../../shared/lib/router/utils/route-regex";
+import { getModuleBuildInfo } from "../loaders/get-module-build-info";
+import { getSortedRoutes } from "../../../shared/lib/router/utils";
+import { webpack, sources } from "next/dist/compiled/webpack/webpack";
+import picomatch from "next/dist/compiled/picomatch";
+import path from "path";
+import { EDGE_RUNTIME_WEBPACK, EDGE_UNSUPPORTED_NODE_APIS, MIDDLEWARE_BUILD_MANIFEST, CLIENT_REFERENCE_MANIFEST, MIDDLEWARE_MANIFEST, MIDDLEWARE_REACT_LOADABLE_MANIFEST, SUBRESOURCE_INTEGRITY_MANIFEST, NEXT_FONT_MANIFEST, SERVER_REFERENCE_MANIFEST, INTERCEPTION_ROUTE_REWRITE_MANIFEST } from "../../../shared/lib/constants";
+import { traceGlobals } from "../../../trace/shared";
+import { EVENT_BUILD_FEATURE_USAGE } from "../../../telemetry/events";
+import { normalizeAppPath } from "../../../shared/lib/router/utils/app-paths";
+import { INSTRUMENTATION_HOOK_FILENAME } from "../../../lib/constants";
+import { isInterceptionRouteRewrite } from "../../../lib/generate-interception-routes-rewrites";
+import { getDynamicCodeEvaluationError } from "./wellknown-errors-plugin/parse-dynamic-code-evaluation-error";
+import { getModuleReferencesInOrder } from "../utils";
+const KNOWN_SAFE_DYNAMIC_PACKAGES = require("../../../lib/known-edge-safe-packages.json");
+const NAME = "MiddlewarePlugin";
+const MANIFEST_VERSION = 3;
+/**
+ * Checks the value of usingIndirectEval and when it is a set of modules it
+ * check if any of the modules is actually being used. If the value is
+ * simply truthy it will return true.
+ */ function isUsingIndirectEvalAndUsedByExports(args) {
+    const { moduleGraph, runtime, module, usingIndirectEval, wp } = args;
+    if (typeof usingIndirectEval === "boolean") {
+        return usingIndirectEval;
+    }
+    const exportsInfo = moduleGraph.getExportsInfo(module);
+    for (const exportName of usingIndirectEval){
+        if (exportsInfo.getUsed(exportName, runtime) !== wp.UsageState.Unused) {
+            return true;
+        }
+    }
+    return false;
+}
+function getEntryFiles(entryFiles, meta, hasInstrumentationHook, opts) {
+    const files = [];
+    if (meta.edgeSSR) {
+        if (meta.edgeSSR.isServerComponent) {
+            files.push(`server/${SERVER_REFERENCE_MANIFEST}.js`);
+            if (opts.sriEnabled) {
+                files.push(`server/${SUBRESOURCE_INTEGRITY_MANIFEST}.js`);
+            }
+            files.push(...entryFiles.filter((file)=>file.startsWith("app/") && !file.endsWith(".hot-update.js")).map((file)=>"server/" + file.replace(".js", "_" + CLIENT_REFERENCE_MANIFEST + ".js")));
+        }
+        files.push(`server/${MIDDLEWARE_BUILD_MANIFEST}.js`, `server/${MIDDLEWARE_REACT_LOADABLE_MANIFEST}.js`, `server/${NEXT_FONT_MANIFEST}.js`, `server/${INTERCEPTION_ROUTE_REWRITE_MANIFEST}.js`);
+    }
+    if (hasInstrumentationHook) {
+        files.push(`server/edge-${INSTRUMENTATION_HOOK_FILENAME}.js`);
+    }
+    files.push(...entryFiles.filter((file)=>!file.endsWith(".hot-update.js")).map((file)=>"server/" + file));
+    return files;
+}
+function getCreateAssets(params) {
+    const { compilation, metadataByEntry, opts } = params;
+    return (assets)=>{
+        const middlewareManifest = {
+            version: MANIFEST_VERSION,
+            middleware: {},
+            functions: {},
+            sortedMiddleware: []
+        };
+        const hasInstrumentationHook = compilation.entrypoints.has(INSTRUMENTATION_HOOK_FILENAME);
+        // we only emit this entry for the edge runtime since it doesn't have access to a routes manifest
+        // and we don't need to provide the entire route manifest, just the interception routes.
+        const interceptionRewrites = JSON.stringify(opts.rewrites.beforeFiles.filter(isInterceptionRouteRewrite));
+        assets[`${INTERCEPTION_ROUTE_REWRITE_MANIFEST}.js`] = new sources.RawSource(`self.__INTERCEPTION_ROUTE_REWRITE_MANIFEST=${JSON.stringify(interceptionRewrites)}`);
+        for (const entrypoint of compilation.entrypoints.values()){
+            var _metadata_edgeMiddleware, _metadata_edgeSSR, _metadata_edgeApiFunction, _metadata_edgeSSR1, _metadata_edgeMiddleware1;
+            if (!entrypoint.name) {
+                continue;
+            }
+            // There should always be metadata for the entrypoint.
+            const metadata = metadataByEntry.get(entrypoint.name);
+            const page = (metadata == null ? void 0 : (_metadata_edgeMiddleware = metadata.edgeMiddleware) == null ? void 0 : _metadata_edgeMiddleware.page) || (metadata == null ? void 0 : (_metadata_edgeSSR = metadata.edgeSSR) == null ? void 0 : _metadata_edgeSSR.page) || (metadata == null ? void 0 : (_metadata_edgeApiFunction = metadata.edgeApiFunction) == null ? void 0 : _metadata_edgeApiFunction.page);
+            if (!page) {
+                continue;
+            }
+            const matcherSource = ((_metadata_edgeSSR1 = metadata.edgeSSR) == null ? void 0 : _metadata_edgeSSR1.isAppDir) ? normalizeAppPath(page) : page;
+            const catchAll = !metadata.edgeSSR && !metadata.edgeApiFunction;
+            const { namedRegex } = getNamedMiddlewareRegex(matcherSource, {
+                catchAll
+            });
+            const matchers = (metadata == null ? void 0 : (_metadata_edgeMiddleware1 = metadata.edgeMiddleware) == null ? void 0 : _metadata_edgeMiddleware1.matchers) ?? [
+                {
+                    regexp: namedRegex,
+                    originalSource: page === "/" && catchAll ? "/:path*" : matcherSource
+                }
+            ];
+            const isEdgeFunction = !!(metadata.edgeApiFunction || metadata.edgeSSR);
+            const edgeFunctionDefinition = {
+                files: getEntryFiles(entrypoint.getFiles(), metadata, hasInstrumentationHook, opts),
+                name: entrypoint.name,
+                page: page,
+                matchers,
+                wasm: Array.from(metadata.wasmBindings, ([name, filePath])=>({
+                        name,
+                        filePath
+                    })),
+                assets: Array.from(metadata.assetBindings, ([name, filePath])=>({
+                        name,
+                        filePath
+                    })),
+                env: opts.edgeEnvironments,
+                ...metadata.regions && {
+                    regions: metadata.regions
+                }
+            };
+            if (isEdgeFunction) {
+                middlewareManifest.functions[page] = edgeFunctionDefinition;
+            } else {
+                middlewareManifest.middleware[page] = edgeFunctionDefinition;
+            }
+        }
+        middlewareManifest.sortedMiddleware = getSortedRoutes(Object.keys(middlewareManifest.middleware));
+        assets[MIDDLEWARE_MANIFEST] = new sources.RawSource(JSON.stringify(middlewareManifest, null, 2));
+    };
+}
+function buildWebpackError({ message, loc, compilation, entryModule, parser }) {
+    const error = new compilation.compiler.webpack.WebpackError(message);
+    error.name = NAME;
+    const module = entryModule ?? (parser == null ? void 0 : parser.state.current);
+    if (module) {
+        error.module = module;
+    }
+    error.loc = loc;
+    return error;
+}
+function isInMiddlewareLayer(parser) {
+    var _parser_state_module;
+    return ((_parser_state_module = parser.state.module) == null ? void 0 : _parser_state_module.layer) === "middleware";
+}
+function isNodeJsModule(moduleName) {
+    return require("module").builtinModules.includes(moduleName);
+}
+function isDynamicCodeEvaluationAllowed(fileName, middlewareConfig, rootDir) {
+    // Some packages are known to use `eval` but are safe to use in the Edge
+    // Runtime because the dynamic code will never be executed.
+    if (KNOWN_SAFE_DYNAMIC_PACKAGES.some((pkg)=>fileName.includes(`/node_modules/${pkg}/`.replace(/\//g, path.sep)))) {
+        return true;
+    }
+    const name = fileName.replace(rootDir ?? "", "");
+    return picomatch((middlewareConfig == null ? void 0 : middlewareConfig.unstable_allowDynamicGlobs) ?? [])(name);
+}
+function buildUnsupportedApiError({ apiName, loc, ...rest }) {
+    return buildWebpackError({
+        message: `A Node.js API is used (${apiName} at line: ${loc.start.line}) which is not supported in the Edge Runtime.
+Learn more: https://nextjs.org/docs/api-reference/edge-runtime`,
+        loc,
+        ...rest
+    });
+}
+function registerUnsupportedApiHooks(parser, compilation) {
+    for (const expression of EDGE_UNSUPPORTED_NODE_APIS){
+        const warnForUnsupportedApi = (node)=>{
+            if (!isInMiddlewareLayer(parser)) {
+                return;
+            }
+            compilation.warnings.push(buildUnsupportedApiError({
+                compilation,
+                parser,
+                apiName: expression,
+                ...node
+            }));
+            return true;
+        };
+        parser.hooks.call.for(expression).tap(NAME, warnForUnsupportedApi);
+        parser.hooks.expression.for(expression).tap(NAME, warnForUnsupportedApi);
+        parser.hooks.callMemberChain.for(expression).tap(NAME, warnForUnsupportedApi);
+        parser.hooks.expressionMemberChain.for(expression).tap(NAME, warnForUnsupportedApi);
+    }
+    const warnForUnsupportedProcessApi = (node, [callee])=>{
+        if (!isInMiddlewareLayer(parser) || callee === "env") {
+            return;
+        }
+        compilation.warnings.push(buildUnsupportedApiError({
+            compilation,
+            parser,
+            apiName: `process.${callee}`,
+            ...node
+        }));
+        return true;
+    };
+    parser.hooks.callMemberChain.for("process").tap(NAME, warnForUnsupportedProcessApi);
+    parser.hooks.expressionMemberChain.for("process").tap(NAME, warnForUnsupportedProcessApi);
+}
+function getCodeAnalyzer(params) {
+    return (parser)=>{
+        const { dev, compiler: { webpack: wp }, compilation } = params;
+        const { hooks } = parser;
+        /**
+     * For an expression this will check the graph to ensure it is being used
+     * by exports. Then it will store in the module buildInfo a boolean to
+     * express that it contains dynamic code and, if it is available, the
+     * module path that is using it.
+     */ const handleExpression = ()=>{
+            if (!isInMiddlewareLayer(parser)) {
+                return;
+            }
+            wp.optimize.InnerGraph.onUsage(parser.state, (used = true)=>{
+                const buildInfo = getModuleBuildInfo(parser.state.module);
+                if (buildInfo.usingIndirectEval === true || used === false) {
+                    return;
+                }
+                if (!buildInfo.usingIndirectEval || used === true) {
+                    buildInfo.usingIndirectEval = used;
+                    return;
+                }
+                buildInfo.usingIndirectEval = new Set([
+                    ...Array.from(buildInfo.usingIndirectEval),
+                    ...Array.from(used)
+                ]);
+            });
+        };
+        /**
+     * This expression handler allows to wrap a dynamic code expression with a
+     * function call where we can warn about dynamic code not being allowed
+     * but actually execute the expression.
+     */ const handleWrapExpression = (expr)=>{
+            if (!isInMiddlewareLayer(parser)) {
+                return;
+            }
+            const { ConstDependency } = wp.dependencies;
+            const dep1 = new ConstDependency("__next_eval__(function() { return ", expr.range[0]);
+            dep1.loc = expr.loc;
+            parser.state.module.addPresentationalDependency(dep1);
+            const dep2 = new ConstDependency("})", expr.range[1]);
+            dep2.loc = expr.loc;
+            parser.state.module.addPresentationalDependency(dep2);
+            handleExpression();
+            return true;
+        };
+        /**
+     * This expression handler allows to wrap a WebAssembly.compile invocation with a
+     * function call where we can warn about WASM code generation not being allowed
+     * but actually execute the expression.
+     */ const handleWrapWasmCompileExpression = (expr)=>{
+            if (!isInMiddlewareLayer(parser)) {
+                return;
+            }
+            const { ConstDependency } = wp.dependencies;
+            const dep1 = new ConstDependency("__next_webassembly_compile__(function() { return ", expr.range[0]);
+            dep1.loc = expr.loc;
+            parser.state.module.addPresentationalDependency(dep1);
+            const dep2 = new ConstDependency("})", expr.range[1]);
+            dep2.loc = expr.loc;
+            parser.state.module.addPresentationalDependency(dep2);
+            handleExpression();
+        };
+        /**
+     * This expression handler allows to wrap a WebAssembly.instatiate invocation with a
+     * function call where we can warn about WASM code generation not being allowed
+     * but actually execute the expression.
+     *
+     * Note that we don't update `usingIndirectEval`, i.e. we don't abort a production build
+     * since we can't determine statically if the first parameter is a module (legit use) or
+     * a buffer (dynamic code generation).
+     */ const handleWrapWasmInstantiateExpression = (expr)=>{
+            if (!isInMiddlewareLayer(parser)) {
+                return;
+            }
+            if (dev) {
+                const { ConstDependency } = wp.dependencies;
+                const dep1 = new ConstDependency("__next_webassembly_instantiate__(function() { return ", expr.range[0]);
+                dep1.loc = expr.loc;
+                parser.state.module.addPresentationalDependency(dep1);
+                const dep2 = new ConstDependency("})", expr.range[1]);
+                dep2.loc = expr.loc;
+                parser.state.module.addPresentationalDependency(dep2);
+            }
+        };
+        /**
+     * Handler to store original source location of static and dynamic imports into module's buildInfo.
+     */ const handleImport = (node)=>{
+            var _node_source;
+            if (isInMiddlewareLayer(parser) && ((_node_source = node.source) == null ? void 0 : _node_source.value) && (node == null ? void 0 : node.loc)) {
+                var _node_source_value;
+                const { module, source } = parser.state;
+                const buildInfo = getModuleBuildInfo(module);
+                if (!buildInfo.importLocByPath) {
+                    buildInfo.importLocByPath = new Map();
+                }
+                const importedModule = (_node_source_value = node.source.value) == null ? void 0 : _node_source_value.toString();
+                buildInfo.importLocByPath.set(importedModule, {
+                    sourcePosition: {
+                        ...node.loc.start,
+                        source: module.identifier()
+                    },
+                    sourceContent: source.toString()
+                });
+                if (!dev && isNodeJsModule(importedModule)) {
+                    compilation.warnings.push(buildWebpackError({
+                        message: `A Node.js module is loaded ('${importedModule}' at line ${node.loc.start.line}) which is not supported in the Edge Runtime.
+Learn More: https://nextjs.org/docs/messages/node-module-in-edge-runtime`,
+                        compilation,
+                        parser,
+                        ...node
+                    }));
+                }
+            }
+        };
+        /**
+     * A noop handler to skip analyzing some cases.
+     * Order matters: for it to work, it must be registered first
+     */ const skip = ()=>isInMiddlewareLayer(parser) ? true : undefined;
+        for (const prefix of [
+            "",
+            "global."
+        ]){
+            hooks.expression.for(`${prefix}Function.prototype`).tap(NAME, skip);
+            hooks.expression.for(`${prefix}Function.bind`).tap(NAME, skip);
+            hooks.call.for(`${prefix}eval`).tap(NAME, handleWrapExpression);
+            hooks.call.for(`${prefix}Function`).tap(NAME, handleWrapExpression);
+            hooks.new.for(`${prefix}Function`).tap(NAME, handleWrapExpression);
+            hooks.call.for(`${prefix}WebAssembly.compile`).tap(NAME, handleWrapWasmCompileExpression);
+            hooks.call.for(`${prefix}WebAssembly.instantiate`).tap(NAME, handleWrapWasmInstantiateExpression);
+        }
+        hooks.importCall.tap(NAME, handleImport);
+        hooks.import.tap(NAME, handleImport);
+        if (!dev) {
+            // do not issue compilation warning on dev: invoking code will provide details
+            registerUnsupportedApiHooks(parser, compilation);
+        }
+    };
+}
+function getExtractMetadata(params) {
+    const { dev, compilation, metadataByEntry, compiler } = params;
+    const { webpack: wp } = compiler;
+    return async ()=>{
+        metadataByEntry.clear();
+        const telemetry = traceGlobals.get("telemetry");
+        for (const [entryName, entry] of compilation.entries){
+            var _entry_dependencies, _route_middlewareConfig;
+            if (entry.options.runtime !== EDGE_RUNTIME_WEBPACK) {
+                continue;
+            }
+            const entryDependency = (_entry_dependencies = entry.dependencies) == null ? void 0 : _entry_dependencies[0];
+            const resolvedModule = compilation.moduleGraph.getResolvedModule(entryDependency);
+            if (!resolvedModule) {
+                continue;
+            }
+            const { rootDir, route } = getModuleBuildInfo(resolvedModule);
+            const { moduleGraph } = compilation;
+            const modules = new Set();
+            const addEntriesFromDependency = (dependency)=>{
+                const module = moduleGraph.getModule(dependency);
+                if (module) {
+                    modules.add(module);
+                }
+            };
+            entry.dependencies.forEach(addEntriesFromDependency);
+            entry.includeDependencies.forEach(addEntriesFromDependency);
+            const entryMetadata = {
+                wasmBindings: new Map(),
+                assetBindings: new Map()
+            };
+            if (route == null ? void 0 : (_route_middlewareConfig = route.middlewareConfig) == null ? void 0 : _route_middlewareConfig.regions) {
+                entryMetadata.regions = route.middlewareConfig.regions;
+            }
+            if (route == null ? void 0 : route.preferredRegion) {
+                const preferredRegion = route.preferredRegion;
+                entryMetadata.regions = // Ensures preferredRegion is always an array in the manifest.
+                typeof preferredRegion === "string" ? [
+                    preferredRegion
+                ] : preferredRegion;
+            }
+            let ogImageGenerationCount = 0;
+            for (const module of modules){
+                const buildInfo = getModuleBuildInfo(module);
+                /**
+         * Check if it uses the image generation feature.
+         */ if (!dev) {
+                    const resource = module.resource;
+                    const hasOGImageGeneration = resource && /[\\/]node_modules[\\/]@vercel[\\/]og[\\/]dist[\\/]index\.(edge|node)\.js$|[\\/]next[\\/]dist[\\/](esm[\\/])?server[\\/]og[\\/]image-response\.js$/.test(resource);
+                    if (hasOGImageGeneration) {
+                        ogImageGenerationCount++;
+                    }
+                }
+                /**
+         * When building for production checks if the module is using `eval`
+         * and in such case produces a compilation error. The module has to
+         * be in use.
+         */ if (!dev && buildInfo.usingIndirectEval && isUsingIndirectEvalAndUsedByExports({
+                    module,
+                    moduleGraph,
+                    runtime: wp.util.runtime.getEntryRuntime(compilation, entryName),
+                    usingIndirectEval: buildInfo.usingIndirectEval,
+                    wp
+                })) {
+                    var _route_middlewareConfig1;
+                    const id = module.identifier();
+                    if (/node_modules[\\/]regenerator-runtime[\\/]runtime\.js/.test(id)) {
+                        continue;
+                    }
+                    if (route == null ? void 0 : (_route_middlewareConfig1 = route.middlewareConfig) == null ? void 0 : _route_middlewareConfig1.unstable_allowDynamicGlobs) {
+                        telemetry == null ? void 0 : telemetry.record({
+                            eventName: "NEXT_EDGE_ALLOW_DYNAMIC_USED",
+                            payload: {
+                                file: route == null ? void 0 : route.absolutePagePath.replace(rootDir ?? "", ""),
+                                config: route == null ? void 0 : route.middlewareConfig,
+                                fileWithDynamicCode: module.userRequest.replace(rootDir ?? "", "")
+                            }
+                        });
+                    }
+                    if (!isDynamicCodeEvaluationAllowed(module.userRequest, route == null ? void 0 : route.middlewareConfig, rootDir)) {
+                        const message = `Dynamic Code Evaluation (e. g. 'eval', 'new Function', 'WebAssembly.compile') not allowed in Edge Runtime ${typeof buildInfo.usingIndirectEval !== "boolean" ? `\nUsed by ${Array.from(buildInfo.usingIndirectEval).join(", ")}` : ""}\nLearn More: https://nextjs.org/docs/messages/edge-dynamic-code-evaluation`;
+                        compilation.errors.push(getDynamicCodeEvaluationError(message, module, compilation, compiler));
+                    }
+                }
+                /**
+         * The entry module has to be either a page or a middleware and hold
+         * the corresponding metadata.
+         */ if (buildInfo == null ? void 0 : buildInfo.nextEdgeSSR) {
+                    entryMetadata.edgeSSR = buildInfo.nextEdgeSSR;
+                } else if (buildInfo == null ? void 0 : buildInfo.nextEdgeMiddleware) {
+                    entryMetadata.edgeMiddleware = buildInfo.nextEdgeMiddleware;
+                } else if (buildInfo == null ? void 0 : buildInfo.nextEdgeApiFunction) {
+                    entryMetadata.edgeApiFunction = buildInfo.nextEdgeApiFunction;
+                }
+                /**
+         * If the module is a WASM module we read the binding information and
+         * append it to the entry wasm bindings.
+         */ if (buildInfo == null ? void 0 : buildInfo.nextWasmMiddlewareBinding) {
+                    entryMetadata.wasmBindings.set(buildInfo.nextWasmMiddlewareBinding.name, buildInfo.nextWasmMiddlewareBinding.filePath);
+                }
+                if (buildInfo == null ? void 0 : buildInfo.nextAssetMiddlewareBinding) {
+                    entryMetadata.assetBindings.set(buildInfo.nextAssetMiddlewareBinding.name, buildInfo.nextAssetMiddlewareBinding.filePath);
+                }
+                /**
+         * Append to the list of modules to process outgoingConnections from
+         * the module that is being processed.
+         */ for (const conn of getModuleReferencesInOrder(module, moduleGraph)){
+                    if (conn.module) {
+                        modules.add(conn.module);
+                    }
+                }
+            }
+            telemetry == null ? void 0 : telemetry.record({
+                eventName: EVENT_BUILD_FEATURE_USAGE,
+                payload: {
+                    featureName: "vercelImageGeneration",
+                    invocationCount: ogImageGenerationCount
+                }
+            });
+            metadataByEntry.set(entryName, entryMetadata);
+        }
+    };
+}
+export default class MiddlewarePlugin {
+    constructor({ dev, sriEnabled, rewrites, edgeEnvironments }){
+        this.dev = dev;
+        this.sriEnabled = sriEnabled;
+        this.rewrites = rewrites;
+        this.edgeEnvironments = edgeEnvironments;
+    }
+    apply(compiler) {
+        compiler.hooks.compilation.tap(NAME, (compilation, params)=>{
+            const { hooks } = params.normalModuleFactory;
+            /**
+       * This is the static code analysis phase.
+       */ const codeAnalyzer = getCodeAnalyzer({
+                dev: this.dev,
+                compiler,
+                compilation
+            });
+            hooks.parser.for("javascript/auto").tap(NAME, codeAnalyzer);
+            hooks.parser.for("javascript/dynamic").tap(NAME, codeAnalyzer);
+            hooks.parser.for("javascript/esm").tap(NAME, codeAnalyzer);
+            /**
+       * Extract all metadata for the entry points in a Map object.
+       */ const metadataByEntry = new Map();
+            compilation.hooks.finishModules.tapPromise(NAME, getExtractMetadata({
+                compilation,
+                compiler,
+                dev: this.dev,
+                metadataByEntry
+            }));
+            /**
+       * Emit the middleware manifest.
+       */ compilation.hooks.processAssets.tap({
+                name: "NextJsMiddlewareManifest",
+                stage: webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONS
+            }, getCreateAssets({
+                compilation,
+                metadataByEntry,
+                opts: {
+                    sriEnabled: this.sriEnabled,
+                    rewrites: this.rewrites,
+                    edgeEnvironments: this.edgeEnvironments
+                }
+            }));
+        });
+    }
+}
+export const SUPPORTED_NATIVE_MODULES = [
+    "buffer",
+    "events",
+    "assert",
+    "util",
+    "async_hooks"
+];
+const supportedEdgePolyfills = new Set(SUPPORTED_NATIVE_MODULES);
+export function getEdgePolyfilledModules() {
+    const records = {};
+    for (const mod of SUPPORTED_NATIVE_MODULES){
+        records[mod] = `commonjs node:${mod}`;
+        records[`node:${mod}`] = `commonjs node:${mod}`;
+    }
+    return records;
+}
+export async function handleWebpackExternalForEdgeRuntime({ request, context, contextInfo, getResolve }) {
+    if (contextInfo.issuerLayer === "middleware" && isNodeJsModule(request) && !supportedEdgePolyfills.has(request)) {
+        // allows user to provide and use their polyfills, as we do with buffer.
+        try {
+            await getResolve()(context, request);
+        } catch  {
+            return `root  globalThis.__import_unsupported('${request}')`;
+        }
+    }
+}
+
+//# sourceMappingURL=middleware-plugin.js.map