diff --git a/.eslintrc.yml b/.eslintrc.yml index 0c14b0c..42f6c68 100644 --- a/.eslintrc.yml +++ b/.eslintrc.yml @@ -2,6 +2,7 @@ env: commonjs: true es2021: true node: true + mocha: true extends: - airbnb-base parserOptions: diff --git a/.gitignore b/.gitignore index a72b52e..f06235c 100644 --- a/.gitignore +++ b/.gitignore @@ -1,15 +1,2 @@ -lib-cov -*.seed -*.log -*.csv -*.dat -*.out -*.pid -*.gz - -pids -logs -results - -npm-debug.log node_modules +dist diff --git a/.vscode/settings.json b/.vscode/settings.json new file mode 100644 index 0000000..246e9c6 --- /dev/null +++ b/.vscode/settings.json @@ -0,0 +1,5 @@ +{ + "editor.codeActionsOnSave": { + "source.fixAll.eslint": true + } +} diff --git a/README.md b/README.md index 4e84ada..236e004 100644 --- a/README.md +++ b/README.md @@ -16,6 +16,17 @@ Battle-hardened distributed locking using redis. ## Usage +```js +const { createClient } = require('redis'); +const redis = createClient(); + +const opts = { redis }; +const warlock = new Warlock(opts); + +const unlock = await warlock.lock(key, ttl); +await unlock(); +``` + ```javascript const Warlock = require('node-redis-warlock'); const Redis = require('redis'); @@ -83,3 +94,12 @@ warlock.lock(key, ttl, function(err, unlock, id) { ## ProTips * Read my [Distributed locks using Redis](https://engineering.gosquared.com/distributed-locks-using-redis) article and Redis' author's [A proposal for more reliable locks using Redis](http://antirez.com/news/77) to learn more about the theory of distributed locks using Redis. + + +# Test +```bash +npm run start-redis +npm run watch +npx mocha --exit dist/test/warlock +npm run cleanup +``` diff --git a/lib/lua/parityRelock.lua b/lib/lua/parityRelock.lua index fd53ede..f777b7a 100644 --- a/lib/lua/parityRelock.lua +++ b/lib/lua/parityRelock.lua @@ -1,13 +1,9 @@ -- -- Extend the key if content is equal --- This will extend the lock on the -- --- KEYS[1] - key --- KEYS[2] - content --- KEYS[3] - lock id local key = KEYS[1] -local ttl = KEYS[2] -local id = KEYS[3] +local ttl = ARGV[1] +local id = ARGV[2] local value = redis.call('GET', key) @@ -15,4 +11,4 @@ if value == id then return redis.call('SET', key, id, 'PX', ttl, 'XX'); else return 0 -end \ No newline at end of file +end diff --git a/lib/warlock.ts b/lib/warlock.ts new file mode 100644 index 0000000..a960f7e --- /dev/null +++ b/lib/warlock.ts @@ -0,0 +1,88 @@ +import { RedisClient } from "redis"; +import * as uuid from "uuid"; +import AsyncRedis from 'async-redis'; +import { createScript } from 'node-redis-script'; +import Redis from 'redis'; + +import { readFileSync } from 'fs'; +import { resolve as resolvePath } from 'path'; + +function createParityDel(redis: RedisClient) { + const path = resolvePath(__dirname, '../../lib/lua/parityDel.lua'); + const parityDelSrc = readFileSync(path, 'utf8'); + const opts = { redis }; + return createScript(opts, parityDelSrc); +} + +function createParityRelock(redis: RedisClient) { + const path = resolvePath(__dirname, '../../lib/lua/parityRelock.lua'); + const parityRelockSrc = readFileSync(path, 'utf8'); + const opts = { redis }; + return createScript(opts, parityRelockSrc); +} + +function wait(ms: number) { + return new Promise((resolve) => { + setTimeout(resolve, ms); + }); +} +interface WarlockOpts { + redis?: RedisClient +} +export class Warlock { + redis: RedisClient + parityDel: any; + parityRelock: any; + + constructor(opts: WarlockOpts = {}) { + let redis = opts.redis; + if (!redis) redis = Redis.createClient(); + + this.parityDel = createParityDel(redis); + this.parityRelock = createParityRelock(redis); + + this.redis = AsyncRedis.decorate(redis); + } + + async lock(key: string, ttlMs: number) { + const id = uuid.v4(); + const _key = `${key}:lock`; + const result = await this.redis.set(_key, id, 'PX', ttlMs, 'NX'); + if (result) { + const unlock = () => this.unlock(key, id); + return unlock; + } + return false; + } + + async unlock(key: string, id: string): Promise<0|1> { + const numKeys = 1; + const _key = `${key}:lock`; + const result = await this.parityDel(numKeys, _key, id); + return result; + } + + async optimistic( + key: string, + ttlMs: number, + maxAttempts: number, + waitMs: number + ) { + let attempts = 0; + let unlock; + + while (!unlock && attempts < maxAttempts) { + if (attempts > 0) await wait(waitMs); + unlock = await this.lock(key, ttlMs); + attempts += 1; + } + + return unlock; + } + + async touch(key: string, id: string, ttlMs: number) { + const _key = `${key}:lock`; + const result = await this.parityRelock(1, _key, ttlMs, id); + return result; + } +} diff --git a/package-lock.json b/package-lock.json index ef9a573..6d88538 100644 --- a/package-lock.json +++ b/package-lock.json @@ -14,18 +14,18 @@ } }, "@babel/helper-validator-identifier": { - "version": "7.12.11", - "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.12.11.tgz", - "integrity": 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"spdx-license-ids": { - "version": "3.0.7", - "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.7.tgz", - "integrity": "sha512-U+MTEOO0AiDzxwFvoa4JVnMV6mZlJKk2sBLt90s7G0Gd0Mlknc7kxEn3nuDPNZRta7O2uy8oLcZLVT+4sqNZHQ==", + "version": "3.0.10", + "resolved": "https://registry.npmjs.org/spdx-license-ids/-/spdx-license-ids-3.0.10.tgz", + "integrity": "sha512-oie3/+gKf7QtpitB0LYLETe+k8SifzsX4KixvpOsbI6S0kRiRQ5MKOio8eMSAKQ17N06+wdEOXRiId+zOxo0hA==", "dev": true }, "sprintf-js": { @@ -2030,26 +2234,23 @@ } }, "table": { - "version": "6.0.9", - "resolved": "https://registry.npmjs.org/table/-/table-6.0.9.tgz", - "integrity": "sha512-F3cLs9a3hL1Z7N4+EkSscsel3z55XT950AvB05bwayrNg5T1/gykXtigioTAjbltvbMSJvvhFCbnf6mX+ntnJQ==", + "version": "6.7.1", + "resolved": "https://registry.npmjs.org/table/-/table-6.7.1.tgz", + "integrity": "sha512-ZGum47Yi6KOOFDE8m223td53ath2enHcYLgOCjGr5ngu8bdIARQk6mN/wRMv4yMRcHnCSnHbCEha4sobQx5yWg==", "dev": true, "requires": { "ajv": "^8.0.1", - "is-boolean-object": "^1.1.0", - "is-number-object": "^1.0.4", - "is-string": "^1.0.5", "lodash.clonedeep": "^4.5.0", - "lodash.flatten": "^4.4.0", "lodash.truncate": "^4.4.2", "slice-ansi": "^4.0.0", - "string-width": "^4.2.0" + "string-width": "^4.2.0", + "strip-ansi": "^6.0.0" }, "dependencies": { "ajv": { - "version": "8.0.4", - "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.0.4.tgz", - "integrity": "sha512-v1qwknPv7rNGqtiaC4ywb3OZ3LNrEjbJL5igAe8eTbXOj8ye0XVul2pFRulwl/j3QfUKdQ/J9HZaYfQCnR7cvA==", + "version": "8.6.2", + "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.6.2.tgz", + "integrity": "sha512-9807RlWAgT564wT+DjeyU5OFMPjmzxVobvDFmNAhY+5zD6A2ly3jDp6sgnfyDtlIQ+7H97oc/DGCzzfu9rjw9w==", "dev": true, "requires": { "fast-deep-equal": "^3.1.1", @@ -2114,9 +2315,9 @@ } }, "tsconfig-paths": { - "version": "3.9.0", - "resolved": "https://registry.npmjs.org/tsconfig-paths/-/tsconfig-paths-3.9.0.tgz", - "integrity": "sha512-dRcuzokWhajtZWkQsDVKbWyY+jgcLC5sqJhg2PSgf4ZkH2aHPvaOY8YWGhmjb68b5qqTfasSsDO9k7RUiEmZAw==", + "version": "3.11.0", + "resolved": "https://registry.npmjs.org/tsconfig-paths/-/tsconfig-paths-3.11.0.tgz", + "integrity": "sha512-7ecdYDnIdmv639mmDwslG6KQg1Z9STTz1j7Gcz0xa+nshh/gKDAHcPxRbWOsA3SPp0tXP2leTcY9Kw+NAkfZzA==", "dev": true, "requires": { "@types/json5": "^0.0.29", @@ -2135,9 +2336,15 @@ } }, "type-fest": { - "version": "0.8.1", - "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.8.1.tgz", - "integrity": "sha512-4dbzIzqvjtgiM5rw1k5rEHtBANKmdudhGyBEajN01fEyhaAIhsoKNy6y7+IN93IfpFtwY9iqi7kD+xwKhQsNJA==", + "version": "0.20.2", + "resolved": "https://registry.npmjs.org/type-fest/-/type-fest-0.20.2.tgz", + "integrity": "sha512-Ne+eE4r0/iWnpAxD852z3A+N0Bt5RN//NjJwRd2VFHEmrywxf5vsZlh4R6lixl6B+wz/8d+maTSAkN1FIkI3LQ==", + "dev": true + }, + "typescript": { + "version": "4.4.2", + "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.4.2.tgz", + "integrity": "sha512-gzP+t5W4hdy4c+68bfcv0t400HVJMMd2+H9B7gae1nQlBzCqvrXX+6GL/b3GAgyTH966pzrZ70/fRjwAtZksSQ==", "dev": true }, "unbox-primitive": { diff --git a/package.json b/package.json index 43901e6..4a64418 100644 --- a/package.json +++ b/package.json @@ -8,7 +8,9 @@ "posttest": "npm run cleanup", "start-redis": "docker-compose up -d redis", "test": "mocha --exit ./test/warlock", - "cleanup": "docker-compose stop && docker-compose rm -f" + "cleanup": "docker-compose stop && docker-compose rm -f", + "build": "rm -rf dist && tsc || exit 0", + "watch": "rm -rf dist && tsc -w" }, "repository": { "type": "git", @@ -26,15 +28,21 @@ }, "homepage": "https://github.com/thedeveloper/warlock", "dependencies": { + "async-redis": "^2.0.0", "node-redis-script": "^2.0.1", "uuid": "^8.3.2" }, "devDependencies": { - "eslint": "^7.23.0", + "@types/mocha": "^9.0.0", + "@types/node": "^16.7.10", + "@types/redis": "^2.8.31", + "@types/uuid": "^8.3.1", + "eslint": "^7.32.0", "eslint-config-airbnb-base": "^14.2.1", - "eslint-plugin-import": "^2.22.1", + "eslint-plugin-import": "^2.24.2", "mocha": "^8.3.2", "redis": "^3.1.0", - "should": "^13.2.3" + "should": "^13.2.3", + "typescript": "^4.4.2" } } diff --git a/test/warlock.js b/test/warlock.js deleted file mode 100644 index 16721c2..0000000 --- a/test/warlock.js +++ /dev/null @@ -1,109 +0,0 @@ -const should = require('should'); -const Redis = require('redis'); - -const redis = Redis.createClient({ port: 6386 }); -const warlock = require('../lib/warlock')(redis); - -describe('locking', () => { - it('sets lock', (done) => { - warlock.lock('testLock', 1000, (err, unlock) => { - should.not.exist(err); - (typeof unlock).should.equal('function'); - done(); - }); - }); - - it('does not set lock if it already exists', (done) => { - warlock.lock('testLock', 1000, (err, unlock) => { - should.not.exist(err); - unlock.should.equal(false); - - done(); - }); - }); - - it('does not alter expiry of lock if it already exists', (done) => { - redis.pttl(warlock.makeKey('testLock'), (err, ttl) => { - warlock.lock('testLock', 1000, (err, unlock) => { - should.not.exist(err); - unlock.should.equal(false); - - redis.pttl(warlock.makeKey('testLock'), (err, ttl2) => { - (ttl2 <= ttl).should.equal(true); - - done(); - }); - }); - }); - }); - - it('unlocks', (done) => { - warlock.lock('unlock', 1000, (err, unlock) => { - should.not.exist(err); - unlock(done); - }); - }); -}); - -describe('unlocking with id', () => { - let lockId; - - it('sets lock and gets lock id', (done) => { - warlock.lock('customlock', 20000, (err, unlock, id) => { - should.not.exists(err); - id.should.type('string'); - lockId = id; - done(); - }); - }); - - it('does not unlock with wrong id', (done) => { - warlock.unlock('customlock', 'wrongid', (err, result) => { - should.not.exists(err); - result.should.equal(0); - done(); - }); - }); - - it('unlocks', (done) => { - warlock.unlock('customlock', lockId, (err, result) => { - should.not.exists(err); - result.should.equal(1); - done(); - }); - }); -}); - -describe('touching a lock', function() { - var key = 'touchlock' - , lockId; - - it('sets lock and gets lock id', function(done) { - warlock.lock(key, 1000, function(err, unlock, id) { - should.not.exists(err); - id.should.type("string"); - lockId = id; - done(); - }); - }); - - it('alters expiry of the lock', function(done) { - redis.pttl(warlock.makeKey(key), function(err, ttl) { - warlock.touch(key, lockId, 2000, function(err) { - should.not.exist(err); - redis.pttl(warlock.makeKey(key), function(err, ttl2) { - (ttl2 > ttl).should.equal(true); - done(); - }); - }); - }); - }); - - it('unlocks', function(done) { - warlock.unlock(key, lockId, function(err, result) { - should.not.exists(err); - result.should.equal(1); - done(); - }); - }); -}); \ No newline at end of file diff --git a/test/warlock.ts b/test/warlock.ts new file mode 100644 index 0000000..da92835 --- /dev/null +++ b/test/warlock.ts @@ -0,0 +1,85 @@ +import should from 'should'; +import { createClient } from 'redis'; + +const redis = createClient(6386); +import { Warlock } from '../lib/warlock'; + +const opts = { redis }; +const warlock = new Warlock(opts); + +describe('locking', () => { + it('sets lock', async () => { + const unlock = await warlock.lock('testLock', 1000); + (typeof unlock).should.equal('function'); + }); + + it('does not set lock if it already exists', async () => { + const unlock = await warlock.lock('testLock', 1000); + unlock.should.equal(false); + }); + + it('does not alter expiry of lock if it already exists', async () => { + const key = 'testLock'; + const _key = `${key}:lock`; + const ttl = await redis.pttl(_key); + const ttlMs = 1000; + const unlock = await warlock.lock(key, ttlMs); + unlock.should.equal(false); + const ttl2 = await redis.pttl(_key); + (ttl2 <= ttl).should.equal(true); + }); + + it('unlocks', async () => { + const ttlMs = 1000; + const key = 'testUnlock'; + const unlock = await warlock.lock(key, ttlMs); + if (!unlock) return unlock.should.not.equal(false); + const result = await unlock(); + result.should.equal(1); + }); +}); + +describe('unlocking with incorrect id', () => { + it('denies unlock', async () => { + const ttlMs = 10000; + const key = 'unlockTest'; + await warlock.lock(key, ttlMs); + const id = 'test123'; + const result = await warlock.unlock(key, id); + result.should.equal(0); + }); +}) + +describe.skip('touching a lock', () => { + const key = 'touchlock'; + let lockId; + + it('sets lock and gets lock id', (done) => { + warlock.lock(key, 1000, (err, unlock, id) => { + should.not.exists(err); + id.should.type('string'); + lockId = id; + done(); + }); + }); + + it('alters expiry of the lock', (done) => { + redis.pttl(warlock.makeKey(key), (err, ttl) => { + warlock.touch(key, lockId, 2000, (err) => { + should.not.exist(err); + redis.pttl(warlock.makeKey(key), (err, ttl2) => { + (ttl2 > ttl).should.equal(true); + done(); + }); + }); + }); + }); + + it('unlocks', (done) => { + warlock.unlock(key, lockId, (err, result) => { + should.not.exists(err); + result.should.equal(1); + done(); + }); + }); +}); diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..d923345 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,100 @@ +{ + "compilerOptions": { + /* Visit https://aka.ms/tsconfig.json to read more about this file */ + + /* Projects */ + // "incremental": true, /* Enable incremental compilation */ + // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ + // "tsBuildInfoFile": "./", /* Specify the folder for .tsbuildinfo incremental compilation files. */ + // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects */ + // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ + // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ + + /* Language and Environment */ + "target": "ES2018", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ + // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ + // "jsx": "preserve", /* Specify what JSX code is generated. */ + // "experimentalDecorators": true, /* Enable experimental support for TC39 stage 2 draft decorators. */ + // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ + // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h' */ + // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ + // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using `jsx: react-jsx*`.` */ + // "reactNamespace": "", /* Specify the object invoked for `createElement`. This only applies when targeting `react` JSX emit. */ + // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ + // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ + + /* Modules */ + "module": "commonjs", /* Specify what module code is generated. */ + // "rootDir": "./", /* Specify the root folder within your source files. */ + // "moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */ + // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ + // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ + // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ + // "typeRoots": [], /* Specify multiple folders that act like `./node_modules/@types`. */ + // "types": [], /* Specify type package names to be included without being referenced in a source file. */ + // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ + // "resolveJsonModule": true, /* Enable importing .json files */ + // "noResolve": true, /* Disallow `import`s, `require`s or ``s from expanding the number of files TypeScript should add to a project. */ + + /* JavaScript Support */ + // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */ + // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ + // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */ + + /* Emit */ + "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ + // "declarationMap": true, /* Create sourcemaps for d.ts files. */ + // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ + // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ + // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */ + "outDir": "./dist", /* Specify an output folder for all emitted files. */ + // "removeComments": true, /* Disable emitting comments. */ + // "noEmit": true, /* Disable emitting files from a compilation. */ + // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ + // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types */ + // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ + // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ + // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ + "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ + "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ + // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ + // "newLine": "crlf", /* Set the newline character for emitting files. */ + // "stripInternal": true, /* Disable emitting declarations that have `@internal` in their JSDoc comments. */ + // "noEmitHelpers": true, /* Disable generating custom helper functions like `__extends` in compiled output. */ + // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ + // "preserveConstEnums": true, /* Disable erasing `const enum` declarations in generated code. */ + // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ + + /* Interop Constraints */ + // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ + // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ + "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */ + // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ + "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ + + /* Type Checking */ + "strict": true, /* Enable all strict type-checking options. */ + // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied `any` type.. */ + // "strictNullChecks": true, /* When type checking, take into account `null` and `undefined`. */ + // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ + // "strictBindCallApply": true, /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */ + // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ + // "noImplicitThis": true, /* Enable error reporting when `this` is given the type `any`. */ + // "useUnknownInCatchVariables": true, /* Type catch clause variables as 'unknown' instead of 'any'. */ + // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ + // "noUnusedLocals": true, /* Enable error reporting when a local variables aren't read. */ + // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read */ + // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ + // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ + // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ + // "noUncheckedIndexedAccess": true, /* Include 'undefined' in index signature results */ + // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ + // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type */ + // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ + // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ + + /* Completeness */ + // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ + "skipLibCheck": true /* Skip type checking all .d.ts files. */ + } +}