Failed to load parser '@typescript-eslint/parser' declared in 'BaseConfig': Cannot find module 'typescript'

[noel-schenk]

Tell us about your environment

Environment Info:

Node version: v10.16.3
npm version: v6.11.3
Local ESLint version: v6.5.1 (Currently used)
Global ESLint version: Not found

typescript-eslint/parser

Please show your full configuration:

{
  "author": "Eric MORAND <eric.morand@gmail.com>",
  "name": "twing",
  "description": "First-class Twig engine for Node.js",
  "keywords": [
    "browser",
    "compiler",
    "template",
    "twig",
    "twig-engine",
    "typescript"
  ],
  "version": "3.0.1",
  "homepage": "http://NightlyCommit.github.io/twing",
  "license": "BSD-2-Clause",
  "repository": {
    "type": "git",
    "url": "git://github.com/NightlyCommit/twing"
  },
  "main": "dist/cjs/main.js",
  "browser": "dist/es/browser.js",
  "module": "dist/es",
  "types": "dist/types/main.d.ts",
  "engines": {
    "node": ">=6.0.0"
  },
  "scripts": {
    "precover": "rimraf coverage .nyc_output",
    "postbuild:cjs": "replace-in-file '__VERSION__' $npm_package_version dist/cjs/**/*",
    "postbuild:es": "replace-in-file '__VERSION__' $npm_package_version dist/es/**/*",
    "pretest": "rimraf test/tests/types/dist && npm run build:cjs -- --sourceMap true",
    "pretest:browser": "npm run pretest",
    "pretest:types": "npm run pretest && rimraf test/tests/types/dist",
    "prepack": "npm run build && npm run bundle",
    "test": "npm run fastest:all",
    "test:browser": "npm run fastest:integration:browser",
    "test:docs": "cd docs && bundle exec jekyll build",
    "test:types": "tsc --project test/tests/types",
    "fastest:all": "tape 'test/tests/**/test.js' | tap-bail | tap-spec",
    "fastest:integration": "tape test/tests/integration/**/test.js | tap-bail | tap-spec",
    "fastest:integration:browser": "node test/tests/integration/browser.js | browserify - --basedir ./test -t [ stringify --extensions [.html .twig] ] | tape-run --render='tap-spec'",
    "fastest:unit": "tape 'test/tests/unit/**/test.js' | tap-bail | tap-spec",
    "cover": "nyc npm t",
    "coverage": "nyc report --reporter=text-lcov | coveralls",
    "build": "npm run build:cjs && npm run build:es && npm run build:types",
    "build:cjs": "rimraf dist/cjs && tsc --project . --module commonjs --outDir dist/cjs",
    "build:es": "rimraf dist/es && tsc --project . --module es6 --outDir dist/es",
    "build:types": "rimraf dist/types && tsc --project . --declaration true --emitDeclarationOnly true --outDir dist/types",
    "bundle": "browserify dist/cjs/browser.js -g uglifyify -s Twing -o dist/lib.min.js",
    "docs": "cd docs && bundle exec jekyll serve",
    "docs:install": "cd docs && bundle install --path vendor/bundle"
  },
  "dependencies": {
    "@types/luxon": "^1.4.0",
    "camelcase": "^4.1.0",
    "capitalize": "^1.0.0",
    "crypto-js": "^3.1.9-1",
    "esrever": "^0.2.0",
    "fs-extra": "^5.0.0",
    "htmlspecialchars": "^1.0.5",
    "iconv-lite": "^0.4.19",
    "is-integer": "^1.0.7",
    "is-number": "^5.0.0",
    "is-plain-object": "^2.0.4",
    "isobject": "^3.0.1",
    "levenshtein": "^1.0.5",
    "locutus": "^2.0.11",
    "luxon": "^1.19.3",
    "merge": "^1.2.1",
    "object-hash": "^1.2.0",
    "pad": "^2.0.3",
    "regex-parser": "^2.2.8",
    "runes": "^0.4.3",
    "snake-case": "^2.1.0",
    "source-map": "^0.6.1",
    "tmp": "0.0.33",
    "twig-lexer": "^0.6.3",
    "utf8-binary-cutter": "^0.9.2",
    "var-validator": "0.0.3"
  },
  "devDependencies": {
    "@types/locutus": "0.0.5",
    "@types/node": "^9.3.0",
    "@types/sinon": "^4.3.0",
    "@types/tmp": "0.0.33",
    "@typescript-eslint/parser": "^2.3.2",
    "browserify": "^16.2.3",
    "coveralls": "^3.0.0",
    "eslint": "^6.5.1",
    "fs-finder": "^1.8.1",
    "node-hook": "^1.0.0",
    "nyc": "^13.3.0",
    "replace-in-file": "^3.4.2",
    "rimraf": "^2.6.2",
    "sinon": "^6.3.4",
    "stringify": "^5.2.0",
    "tap-bail": "^1.0.0",
    "tap-spec": "^5.0.0",
    "tape": "^4.9.0",
    "tape-run": "^6.0.0",
    "typescript": "^3.1.3",
    "uglifyify": "^5.0.1"
  }
}

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

sudo npm install eslint --save-dev
sudo npm install @typescript-eslint/parser --save-dev
sudo ./node_modules/.bin/eslint --init

? How would you like to use ESLint? To check syntax, find problems, and enforce code style
? What type of modules does your project use? CommonJS (require/exports)
? Which framework does your project use? None of these
? Does your project use TypeScript? Yes
? Where does your code run? (Press <space> to select, <a> to toggle all, <i> to invert selection)Browser, Node
? How would you like to define a style for your project? Inspect your JavaScript file(s)
? Which file(s), path(s), or glob(s) should be examined? /home/noel/Documents/sync/twing/twing/src/**/*.ts
? What format do you want your config file to be in? JSON

What did you expect to happen?
Initializing ESLINT and after that checking the code.

What actually happened? Please include the actual, raw output from ESLint.

? What format do you want your config file to be in? JSON
Determining Config: 0% [------------------------------] 0.0s elapsed, eta 0.0s 

Failed to load parser '@typescript-eslint/parser' declared in 'BaseConfig': Cannot find module 'typescript'
Error: Failed to load parser '@typescript-eslint/parser' declared in 'BaseConfig': Cannot find module 'typescript'
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:636:15)
    at Function.Module._load (internal/modules/cjs/loader.js:562:25)
    at Module.require (internal/modules/cjs/loader.js:692:17)
    at require (/home/noel/Documents/sync/twing/twing/node_modules/v8-compile-cache/v8-compile-cache.js:161:20)
    at Object.<anonymous> (/home/noel/Documents/sync/twing/twing/node_modules/@typescript-eslint/typescript-estree/dist/parser.js:18:25)
    at Module._compile (/home/noel/Documents/sync/twing/twing/node_modules/v8-compile-cache/v8-compile-cache.js:194:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
    at Module.load (internal/modules/cjs/loader.js:653:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
    at Function.Module._load (internal/modules/cjs/loader.js:585:3)

[kaicataldo]

Can you share some more information about when you encountered this error? Did it occur while running eslint --init or did it occur when you ran ESLint after running the initializer? It looks like the former, but I just want to confirm.

[noel-schenk]

It occurred while trying to do sudo ./node_modules/.bin/eslint --init

[kaicataldo]

Thanks, and is typescript in your node_modules directory? Do you mind sharing the output of running npm ls typescript in the root directory of this project (where package.json is)?

[noel-schenk]

I think it's not

noel@noel:~/Documents/sync/twing/twing$ npm ls typescript
twing@3.0.1 /home/noel/Documents/sync/twing/twing
└── (empty)

but it's part of the devDependencies

[kaicataldo]

The initializer doesn't install typescript for you (see typescript-eslint/typescript-eslint#828 for more details). Might be a silly question, but have you tried after running npm install?

[noel-schenk]

Ah okay I manually added typescript ... seems like that solved the problem
Thank you so much!

[kaicataldo]

Glad you were able to solve it!