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node_modules/gcp-metadata/build/src/gcp-residency.d.ts

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+/**
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/**
+ * Known paths unique to Google Compute Engine Linux instances
+ */
+export declare const GCE_LINUX_BIOS_PATHS: {
+    BIOS_DATE: string;
+    BIOS_VENDOR: string;
+};
+/**
+ * Determines if the process is running on a Google Cloud Serverless environment (Cloud Run or Cloud Functions instance).
+ *
+ * Uses the:
+ * - {@link https://cloud.google.com/run/docs/container-contract#env-vars Cloud Run environment variables}.
+ * - {@link https://cloud.google.com/functions/docs/env-var Cloud Functions environment variables}.
+ *
+ * @returns {boolean} `true` if the process is running on GCP serverless, `false` otherwise.
+ */
+export declare function isGoogleCloudServerless(): boolean;
+/**
+ * Determines if the process is running on a Linux Google Compute Engine instance.
+ *
+ * @returns {boolean} `true` if the process is running on Linux GCE, `false` otherwise.
+ */
+export declare function isGoogleComputeEngineLinux(): boolean;
+/**
+ * Determines if the process is running on a Google Compute Engine instance with a known
+ * MAC address.
+ *
+ * @returns {boolean} `true` if the process is running on GCE (as determined by MAC address), `false` otherwise.
+ */
+export declare function isGoogleComputeEngineMACAddress(): boolean;
+/**
+ * Determines if the process is running on a Google Compute Engine instance.
+ *
+ * @returns {boolean} `true` if the process is running on GCE, `false` otherwise.
+ */
+export declare function isGoogleComputeEngine(): boolean;
+/**
+ * Determines if the process is running on Google Cloud Platform.
+ *
+ * @returns {boolean} `true` if the process is running on GCP, `false` otherwise.
+ */
+export declare function detectGCPResidency(): boolean;

node_modules/gcp-metadata/build/src/gcp-residency.js

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+"use strict";
+/**
+ * Copyright 2022 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.GCE_LINUX_BIOS_PATHS = void 0;
+exports.isGoogleCloudServerless = isGoogleCloudServerless;
+exports.isGoogleComputeEngineLinux = isGoogleComputeEngineLinux;
+exports.isGoogleComputeEngineMACAddress = isGoogleComputeEngineMACAddress;
+exports.isGoogleComputeEngine = isGoogleComputeEngine;
+exports.detectGCPResidency = detectGCPResidency;
+const fs_1 = require("fs");
+const os_1 = require("os");
+/**
+ * Known paths unique to Google Compute Engine Linux instances
+ */
+exports.GCE_LINUX_BIOS_PATHS = {
+    BIOS_DATE: '/sys/class/dmi/id/bios_date',
+    BIOS_VENDOR: '/sys/class/dmi/id/bios_vendor',
+};
+const GCE_MAC_ADDRESS_REGEX = /^42:01/;
+/**
+ * Determines if the process is running on a Google Cloud Serverless environment (Cloud Run or Cloud Functions instance).
+ *
+ * Uses the:
+ * - {@link https://cloud.google.com/run/docs/container-contract#env-vars Cloud Run environment variables}.
+ * - {@link https://cloud.google.com/functions/docs/env-var Cloud Functions environment variables}.
+ *
+ * @returns {boolean} `true` if the process is running on GCP serverless, `false` otherwise.
+ */
+function isGoogleCloudServerless() {
+    /**
+     * `CLOUD_RUN_JOB` is used for Cloud Run Jobs
+     * - See {@link https://cloud.google.com/run/docs/container-contract#env-vars Cloud Run environment variables}.
+     *
+     * `FUNCTION_NAME` is used in older Cloud Functions environments:
+     * - See {@link https://cloud.google.com/functions/docs/env-var Python 3.7 and Go 1.11}.
+     *
+     * `K_SERVICE` is used in Cloud Run and newer Cloud Functions environments:
+     * - See {@link https://cloud.google.com/run/docs/container-contract#env-vars Cloud Run environment variables}.
+     * - See {@link https://cloud.google.com/functions/docs/env-var Cloud Functions newer runtimes}.
+     */
+    const isGFEnvironment = process.env.CLOUD_RUN_JOB ||
+        process.env.FUNCTION_NAME ||
+        process.env.K_SERVICE;
+    return !!isGFEnvironment;
+}
+/**
+ * Determines if the process is running on a Linux Google Compute Engine instance.
+ *
+ * @returns {boolean} `true` if the process is running on Linux GCE, `false` otherwise.
+ */
+function isGoogleComputeEngineLinux() {
+    if ((0, os_1.platform)() !== 'linux')
+        return false;
+    try {
+        // ensure this file exist
+        (0, fs_1.statSync)(exports.GCE_LINUX_BIOS_PATHS.BIOS_DATE);
+        // ensure this file exist and matches
+        const biosVendor = (0, fs_1.readFileSync)(exports.GCE_LINUX_BIOS_PATHS.BIOS_VENDOR, 'utf8');
+        return /Google/.test(biosVendor);
+    }
+    catch {
+        return false;
+    }
+}
+/**
+ * Determines if the process is running on a Google Compute Engine instance with a known
+ * MAC address.
+ *
+ * @returns {boolean} `true` if the process is running on GCE (as determined by MAC address), `false` otherwise.
+ */
+function isGoogleComputeEngineMACAddress() {
+    const interfaces = (0, os_1.networkInterfaces)();
+    for (const item of Object.values(interfaces)) {
+        if (!item)
+            continue;
+        for (const { mac } of item) {
+            if (GCE_MAC_ADDRESS_REGEX.test(mac)) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+/**
+ * Determines if the process is running on a Google Compute Engine instance.
+ *
+ * @returns {boolean} `true` if the process is running on GCE, `false` otherwise.
+ */
+function isGoogleComputeEngine() {
+    return isGoogleComputeEngineLinux() || isGoogleComputeEngineMACAddress();
+}
+/**
+ * Determines if the process is running on Google Cloud Platform.
+ *
+ * @returns {boolean} `true` if the process is running on GCP, `false` otherwise.
+ */
+function detectGCPResidency() {
+    return isGoogleCloudServerless() || isGoogleComputeEngine();
+}
+//# sourceMappingURL=gcp-residency.js.map

node_modules/gcp-metadata/build/src/gcp-residency.js.map

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node_modules/gcp-metadata/build/src/index.d.ts

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+export declare const BASE_PATH = "/computeMetadata/v1";
+export declare const HOST_ADDRESS = "http://169.254.169.254";
+export declare const SECONDARY_HOST_ADDRESS = "http://metadata.google.internal.";
+export declare const HEADER_NAME = "Metadata-Flavor";
+export declare const HEADER_VALUE = "Google";
+export declare const HEADERS: Readonly<{
+    "Metadata-Flavor": "Google";
+}>;
+/**
+ * Metadata server detection override options.
+ *
+ * Available via `process.env.METADATA_SERVER_DETECTION`.
+ */
+export declare const METADATA_SERVER_DETECTION: Readonly<{
+    'assume-present': "don't try to ping the metadata server, but assume it's present";
+    none: "don't try to ping the metadata server, but don't try to use it either";
+    'bios-only': "treat the result of a BIOS probe as canonical (don't fall back to pinging)";
+    'ping-only': "skip the BIOS probe, and go straight to pinging";
+}>;
+type HeadersInit = ConstructorParameters<typeof Headers>[0];
+export interface Options {
+    params?: {
+        [index: string]: string;
+    };
+    property?: string;
+    headers?: HeadersInit;
+}
+export interface MetadataAccessor {
+    /**
+     *
+     * @example
+     *
+     * // equivalent to `project('project-id')`;
+     * const metadataKey = 'project/project-id';
+     */
+    metadataKey: string;
+    params?: Options['params'];
+    headers?: Options['headers'];
+    noResponseRetries?: number;
+    fastFail?: boolean;
+}
+export type BulkResults<T extends readonly MetadataAccessor[]> = {
+    [key in T[number]['metadataKey']]: ReturnType<JSON['parse']>;
+};
+/**
+ * Obtain metadata for the current GCE instance.
+ *
+ * @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
+ *
+ * @example
+ * ```
+ * const serviceAccount: {} = await instance('service-accounts/');
+ * const serviceAccountEmail: string = await instance('service-accounts/default/email');
+ * ```
+ */
+export declare function instance<T = any>(options?: string | Options): Promise<T>;
+/**
+ * Obtain metadata for the current GCP project.
+ *
+ * @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
+ *
+ * @example
+ * ```
+ * const projectId: string = await project('project-id');
+ * const numericProjectId: number = await project('numeric-project-id');
+ * ```
+ */
+export declare function project<T = any>(options?: string | Options): Promise<T>;
+/**
+ * Obtain metadata for the current universe.
+ *
+ * @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
+ *
+ * @example
+ * ```
+ * const universeDomain: string = await universe('universe-domain');
+ * ```
+ */
+export declare function universe<T>(options?: string | Options): Promise<T>;
+/**
+ * Retrieve metadata items in parallel.
+ *
+ * @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
+ *
+ * @example
+ * ```
+ * const data = await bulk([
+ *   {
+ *     metadataKey: 'instance',
+ *   },
+ *   {
+ *     metadataKey: 'project/project-id',
+ *   },
+ * ] as const);
+ *
+ * // data.instance;
+ * // data['project/project-id'];
+ * ```
+ *
+ * @param properties The metadata properties to retrieve
+ * @returns The metadata in `metadatakey:value` format
+ */
+export declare function bulk<T extends readonly Readonly<MetadataAccessor>[], R extends BulkResults<T> = BulkResults<T>>(properties: T): Promise<R>;
+/**
+ * Determine if the metadata server is currently available.
+ */
+export declare function isAvailable(): Promise<boolean>;
+/**
+ * reset the memoized isAvailable() lookup.
+ */
+export declare function resetIsAvailableCache(): void;
+/**
+ * A cache for the detected GCP Residency.
+ */
+export declare let gcpResidencyCache: boolean | null;
+/**
+ * Detects GCP Residency.
+ * Caches results to reduce costs for subsequent calls.
+ *
+ * @see setGCPResidency for setting
+ */
+export declare function getGCPResidency(): boolean;
+/**
+ * Sets the detected GCP Residency.
+ * Useful for forcing metadata server detection behavior.
+ *
+ * Set `null` to autodetect the environment (default behavior).
+ * @see getGCPResidency for getting
+ */
+export declare function setGCPResidency(value?: boolean | null): void;
+/**
+ * Obtain the timeout for requests to the metadata server.
+ *
+ * In certain environments and conditions requests can take longer than
+ * the default timeout to complete. This function will determine the
+ * appropriate timeout based on the environment.
+ *
+ * @returns {number} a request timeout duration in milliseconds.
+ */
+export declare function requestTimeout(): number;
+export * from './gcp-residency';

node_modules/gcp-metadata/build/src/index.js

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+"use strict";
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || (function () {
+    var ownKeys = function(o) {
+        ownKeys = Object.getOwnPropertyNames || function (o) {
+            var ar = [];
+            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
+            return ar;
+        };
+        return ownKeys(o);
+    };
+    return function (mod) {
+        if (mod && mod.__esModule) return mod;
+        var result = {};
+        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+        __setModuleDefault(result, mod);
+        return result;
+    };
+})();
+var __exportStar = (this && this.__exportStar) || function(m, exports) {
+    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.gcpResidencyCache = exports.METADATA_SERVER_DETECTION = exports.HEADERS = exports.HEADER_VALUE = exports.HEADER_NAME = exports.SECONDARY_HOST_ADDRESS = exports.HOST_ADDRESS = exports.BASE_PATH = void 0;
+exports.instance = instance;
+exports.project = project;
+exports.universe = universe;
+exports.bulk = bulk;
+exports.isAvailable = isAvailable;
+exports.resetIsAvailableCache = resetIsAvailableCache;
+exports.getGCPResidency = getGCPResidency;
+exports.setGCPResidency = setGCPResidency;
+exports.requestTimeout = requestTimeout;
+/**
+ * Copyright 2018 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+const gaxios_1 = require("gaxios");
+const jsonBigint = require("json-bigint");
+const gcp_residency_1 = require("./gcp-residency");
+const logger = __importStar(require("google-logging-utils"));
+exports.BASE_PATH = '/computeMetadata/v1';
+exports.HOST_ADDRESS = 'http://169.254.169.254';
+exports.SECONDARY_HOST_ADDRESS = 'http://metadata.google.internal.';
+exports.HEADER_NAME = 'Metadata-Flavor';
+exports.HEADER_VALUE = 'Google';
+exports.HEADERS = Object.freeze({ [exports.HEADER_NAME]: exports.HEADER_VALUE });
+const log = logger.log('gcp-metadata');
+/**
+ * Metadata server detection override options.
+ *
+ * Available via `process.env.METADATA_SERVER_DETECTION`.
+ */
+exports.METADATA_SERVER_DETECTION = Object.freeze({
+    'assume-present': "don't try to ping the metadata server, but assume it's present",
+    none: "don't try to ping the metadata server, but don't try to use it either",
+    'bios-only': "treat the result of a BIOS probe as canonical (don't fall back to pinging)",
+    'ping-only': 'skip the BIOS probe, and go straight to pinging',
+});
+/**
+ * Returns the base URL while taking into account the GCE_METADATA_HOST
+ * environment variable if it exists.
+ *
+ * @returns The base URL, e.g., http://169.254.169.254/computeMetadata/v1.
+ */
+function getBaseUrl(baseUrl) {
+    if (!baseUrl) {
+        baseUrl =
+            process.env.GCE_METADATA_IP ||
+                process.env.GCE_METADATA_HOST ||
+                exports.HOST_ADDRESS;
+    }
+    // If no scheme is provided default to HTTP:
+    if (!/^https?:\/\//.test(baseUrl)) {
+        baseUrl = `http://${baseUrl}`;
+    }
+    return new URL(exports.BASE_PATH, baseUrl).href;
+}
+// Accepts an options object passed from the user to the API. In previous
+// versions of the API, it referred to a `Request` or an `Axios` request
+// options object.  Now it refers to an object with very limited property
+// names. This is here to help ensure users don't pass invalid options when
+// they  upgrade from 0.4 to 0.5 to 0.8.
+function validate(options) {
+    Object.keys(options).forEach(key => {
+        switch (key) {
+            case 'params':
+            case 'property':
+            case 'headers':
+                break;
+            case 'qs':
+                throw new Error("'qs' is not a valid configuration option. Please use 'params' instead.");
+            default:
+                throw new Error(`'${key}' is not a valid configuration option.`);
+        }
+    });
+}
+async function metadataAccessor(type, options = {}, noResponseRetries = 3, fastFail = false) {
+    const headers = new Headers(exports.HEADERS);
+    let metadataKey = '';
+    let params = {};
+    if (typeof type === 'object') {
+        const metadataAccessor = type;
+        new Headers(metadataAccessor.headers).forEach((value, key) => headers.set(key, value));
+        metadataKey = metadataAccessor.metadataKey;
+        params = metadataAccessor.params || params;
+        noResponseRetries = metadataAccessor.noResponseRetries || noResponseRetries;
+        fastFail = metadataAccessor.fastFail || fastFail;
+    }
+    else {
+        metadataKey = type;
+    }
+    if (typeof options === 'string') {
+        metadataKey += `/${options}`;
+    }
+    else {
+        validate(options);
+        if (options.property) {
+            metadataKey += `/${options.property}`;
+        }
+        new Headers(options.headers).forEach((value, key) => headers.set(key, value));
+        params = options.params || params;
+    }
+    const requestMethod = fastFail ? fastFailMetadataRequest : gaxios_1.request;
+    const req = {
+        url: `${getBaseUrl()}/${metadataKey}`,
+        headers,
+        retryConfig: { noResponseRetries },
+        params,
+        responseType: 'text',
+        timeout: requestTimeout(),
+    };
+    log.info('instance request %j', req);
+    const res = await requestMethod(req);
+    log.info('instance metadata is %s', res.data);
+    const metadataFlavor = res.headers.get(exports.HEADER_NAME);
+    if (metadataFlavor !== exports.HEADER_VALUE) {
+        throw new RangeError(`Invalid response from metadata service: incorrect ${exports.HEADER_NAME} header. Expected '${exports.HEADER_VALUE}', got ${metadataFlavor ? `'${metadataFlavor}'` : 'no header'}`);
+    }
+    if (typeof res.data === 'string') {
+        try {
+            return jsonBigint.parse(res.data);
+        }
+        catch {
+            /* ignore */
+        }
+    }
+    return res.data;
+}
+async function fastFailMetadataRequest(options) {
+    const secondaryOptions = {
+        ...options,
+        url: options.url
+            ?.toString()
+            .replace(getBaseUrl(), getBaseUrl(exports.SECONDARY_HOST_ADDRESS)),
+    };
+    // We race a connection between DNS/IP to metadata server. There are a couple
+    // reasons for this:
+    //
+    // 1. the DNS is slow in some GCP environments; by checking both, we might
+    //    detect the runtime environment significantly faster.
+    // 2. we can't just check the IP, which is tarpitted and slow to respond
+    //    on a user's local machine.
+    //
+    // Returns first resolved promise or if all promises get rejected we return an AggregateError.
+    //
+    // Note, however, if a failure happens prior to a success, a rejection should
+    // occur, this is for folks running locally.
+    //
+    const r1 = (0, gaxios_1.request)(options);
+    const r2 = (0, gaxios_1.request)(secondaryOptions);
+    return Promise.any([r1, r2]);
+}
+/**
+ * Obtain metadata for the current GCE instance.
+ *
+ * @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
+ *
+ * @example
+ * ```
+ * const serviceAccount: {} = await instance('service-accounts/');
+ * const serviceAccountEmail: string = await instance('service-accounts/default/email');
+ * ```
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+function instance(options) {
+    return metadataAccessor('instance', options);
+}
+/**
+ * Obtain metadata for the current GCP project.
+ *
+ * @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
+ *
+ * @example
+ * ```
+ * const projectId: string = await project('project-id');
+ * const numericProjectId: number = await project('numeric-project-id');
+ * ```
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+function project(options) {
+    return metadataAccessor('project', options);
+}
+/**
+ * Obtain metadata for the current universe.
+ *
+ * @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
+ *
+ * @example
+ * ```
+ * const universeDomain: string = await universe('universe-domain');
+ * ```
+ */
+function universe(options) {
+    return metadataAccessor('universe', options);
+}
+/**
+ * Retrieve metadata items in parallel.
+ *
+ * @see {@link https://cloud.google.com/compute/docs/metadata/predefined-metadata-keys}
+ *
+ * @example
+ * ```
+ * const data = await bulk([
+ *   {
+ *     metadataKey: 'instance',
+ *   },
+ *   {
+ *     metadataKey: 'project/project-id',
+ *   },
+ * ] as const);
+ *
+ * // data.instance;
+ * // data['project/project-id'];
+ * ```
+ *
+ * @param properties The metadata properties to retrieve
+ * @returns The metadata in `metadatakey:value` format
+ */
+async function bulk(properties) {
+    const r = {};
+    await Promise.all(properties.map(item => {
+        return (async () => {
+            const res = await metadataAccessor(item);
+            const key = item.metadataKey;
+            r[key] = res;
+        })();
+    }));
+    return r;
+}
+/*
+ * How many times should we retry detecting GCP environment.
+ */
+function detectGCPAvailableRetries() {
+    return process.env.DETECT_GCP_RETRIES
+        ? Number(process.env.DETECT_GCP_RETRIES)
+        : 0;
+}
+let cachedIsAvailableResponse;
+/**
+ * Determine if the metadata server is currently available.
+ */
+async function isAvailable() {
+    if (process.env.METADATA_SERVER_DETECTION) {
+        const value = process.env.METADATA_SERVER_DETECTION.trim().toLocaleLowerCase();
+        if (!(value in exports.METADATA_SERVER_DETECTION)) {
+            throw new RangeError(`Unknown \`METADATA_SERVER_DETECTION\` env variable. Got \`${value}\`, but it should be \`${Object.keys(exports.METADATA_SERVER_DETECTION).join('`, `')}\`, or unset`);
+        }
+        switch (value) {
+            case 'assume-present':
+                return true;
+            case 'none':
+                return false;
+            case 'bios-only':
+                return getGCPResidency();
+            case 'ping-only':
+            // continue, we want to ping the server
+        }
+    }
+    try {
+        // If a user is instantiating several GCP libraries at the same time,
+        // this may result in multiple calls to isAvailable(), to detect the
+        // runtime environment. We use the same promise for each of these calls
+        // to reduce the network load.
+        if (cachedIsAvailableResponse === undefined) {
+            cachedIsAvailableResponse = metadataAccessor('instance', undefined, detectGCPAvailableRetries(), 
+            // If the default HOST_ADDRESS has been overridden, we should not
+            // make an effort to try SECONDARY_HOST_ADDRESS (as we are likely in
+            // a non-GCP environment):
+            !(process.env.GCE_METADATA_IP || process.env.GCE_METADATA_HOST));
+        }
+        await cachedIsAvailableResponse;
+        return true;
+    }
+    catch (e) {
+        const err = e;
+        if (process.env.DEBUG_AUTH) {
+            console.info(err);
+        }
+        if (err.type === 'request-timeout') {
+            // If running in a GCP environment, metadata endpoint should return
+            // within ms.
+            return false;
+        }
+        if (err.response && err.response.status === 404) {
+            return false;
+        }
+        else {
+            if (!(err.response && err.response.status === 404) &&
+                // A warning is emitted if we see an unexpected err.code, or err.code
+                // is not populated:
+                (!err.code ||
+                    ![
+                        'EHOSTDOWN',
+                        'EHOSTUNREACH',
+                        'ENETUNREACH',
+                        'ENOENT',
+                        'ENOTFOUND',
+                        'ECONNREFUSED',
+                    ].includes(err.code.toString()))) {
+                let code = 'UNKNOWN';
+                if (err.code)
+                    code = err.code.toString();
+                process.emitWarning(`received unexpected error = ${err.message} code = ${code}`, 'MetadataLookupWarning');
+            }
+            // Failure to resolve the metadata service means that it is not available.
+            return false;
+        }
+    }
+}
+/**
+ * reset the memoized isAvailable() lookup.
+ */
+function resetIsAvailableCache() {
+    cachedIsAvailableResponse = undefined;
+}
+/**
+ * A cache for the detected GCP Residency.
+ */
+exports.gcpResidencyCache = null;
+/**
+ * Detects GCP Residency.
+ * Caches results to reduce costs for subsequent calls.
+ *
+ * @see setGCPResidency for setting
+ */
+function getGCPResidency() {
+    if (exports.gcpResidencyCache === null) {
+        setGCPResidency();
+    }
+    return exports.gcpResidencyCache;
+}
+/**
+ * Sets the detected GCP Residency.
+ * Useful for forcing metadata server detection behavior.
+ *
+ * Set `null` to autodetect the environment (default behavior).
+ * @see getGCPResidency for getting
+ */
+function setGCPResidency(value = null) {
+    exports.gcpResidencyCache = value !== null ? value : (0, gcp_residency_1.detectGCPResidency)();
+}
+/**
+ * Obtain the timeout for requests to the metadata server.
+ *
+ * In certain environments and conditions requests can take longer than
+ * the default timeout to complete. This function will determine the
+ * appropriate timeout based on the environment.
+ *
+ * @returns {number} a request timeout duration in milliseconds.
+ */
+function requestTimeout() {
+    return getGCPResidency() ? 0 : 3000;
+}
+__exportStar(require("./gcp-residency"), exports);
+//# sourceMappingURL=index.js.map