React app failed to load config "airbnb" in deploying to heroku

Question

I failed to deploy my create react app to heroku. Error log is below.

-----> Build
       Running build (yarn)
       yarn run v1.22.10
       $ react-scripts build
       Creating an optimized production build...
       Failed to compile.
       
       Failed to load config "airbnb" to extend from.
       Referenced from: /tmp/build_49ca30fd/.eslintrc.js
       
       
error Command failed with exit code 1.
       info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
-----> Build failed
       
       We're sorry this build is failing! You can troubleshoot common issues here:
       https://devcenter.heroku.com/articles/troubleshooting-node-deploys
       
       Some possible problems:
       
       - Node version not specified in package.json
         https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version
       
       Love,
       Heroku
       
 !     Push rejected, failed to compile Node.js app.
 !     Push failed

This is my eslint.js.

module.exports = {
  env: {
    browser: true,
    es2021: true,
  },
  extends: [
    'plugin:react/recommended',
    'airbnb',
    'airbnb/hooks',
    'plugin:import/errors',
    'plugin:import/warnings',
    'plugin:import/typescript',
    'plugin:@typescript-eslint/recommended',
    'plugin:@typescript-eslint/recommended-requiring-type-checking',
    'prettier',
  ],
  parser: '@typescript-eslint/parser',
  parserOptions: {
    ecmaFeatures: {
      jsx: true,
    },
    ecmaVersion: 12,
    project: './tsconfig.eslint.json',
    sourceType: 'module',
    tsconfigRootDir: __dirname,
  },
  plugins: [
    'react',
    '@typescript-eslint',
    'import',
    'jsx-a11y',
    'react-hooks',
    'prettier',
  ],
  root: true,
  rules: {
    'import/no-cycle': 'off',
    'no-use-before-define': 'off',
    'no-alert': 'off',
    '@typescript-eslint/no-use-before-define': ['error'],
    'lines-between-class-members': [
      'error',
      'always',
      {
        exceptAfterSingleLine: true,
      },
    ],
    'no-void': [
      'error',
      {
        allowAsStatement: true,
      },
    ],
    'padding-line-between-statements': [
      'error',
      {
        blankLine: 'always',
        prev: '*',
        next: 'return',
      },
    ],
    '@typescript-eslint/no-unused-vars': [
      'warn',
      {
        vars: 'all',
        args: 'after-used',
        argsIgnorePattern: '_',
        ignoreRestSiblings: false,
        varsIgnorePattern: '_',
      },
    ],
    '@typescript-eslint/no-unsafe-member-access': ['warn'],
    'import/extensions': [
      'error',
      'ignorePackages',
      {
        js: 'never',
        jsx: 'never',
        ts: 'never',
        tsx: 'never',
      },
    ],
    'react/jsx-filename-extension': [
      'error',
      {
        extensions: ['.jsx', '.tsx'],
      },
    ],
    'react/jsx-props-no-spreading': ['off'],
    'lines-between-class-members': [
      'error',
      'always',
      {
        exceptAfterSingleLine: true,
      },
    ],
  },
  overrides: [
    {
      files: ['*.tsx'],
      rules: {
        'react/prop-types': 'off',
      },
    },
  ],
  settings: {
    'import/resolver': {
      node: {
        paths: ['src'],
      },
    },
  },
}

I use style guide of airbnb with eslint and prettier in my app. I installed them to devDependencies. My pacakage.json is below.

{
  "dependencies": {
    "@fortawesome/fontawesome-svg-core": "^1.2.35",
    "@fortawesome/free-solid-svg-icons": "^5.15.3",
    "@fortawesome/react-fontawesome": "^0.1.14",
    "@hookform/resolvers": "^2.4.0",
    "@loadable/component": "^5.14.1",
    "@material-ui/core": "^4.11.4",
    "@material-ui/icons": "^4.11.2",
    "@material-ui/lab": "^4.0.0-alpha.58",
    "@types/date-fns": "^2.6.0",
    "@types/node": "^15.0.1",
    "@types/react": "^17.0.4",
    "@types/react-dom": "^17.0.3",
    "@types/styled-components": "^5.1.9",
    "axios": "^0.21.1",
    "camelcase-keys": "^6.2.2",
    "date-fns": "^2.21.1",
    "express": "^4.17.1",
    "express-favicon": "^2.0.1",
    "file-saver": "^2.0.5",
    "firebase": "^8.4.3",
    "heroku-ssl-redirect": "^0.1.1",
    "little-state-machine": "^3.1.4",
    "path": "^0.12.7",
    "qs": "^6.10.1",
    "react": "^16.13.1",
    "react-circular-progressbar": "^2.0.4",
    "react-devtools": "^4.13.0",
    "react-dom": "^16.13.1",
    "react-hook-form": "^7.3.5",
    "react-media": "^1.10.0",
    "react-responsive": "^8.2.0",
    "react-router-dom": "^5.2.0",
    "react-scripts": "4.0.3",
    "react-sortablejs": "^6.0.0",
    "sanitize-html": "^2.3.3",
    "snakecase-keys": "^4.0.1",
    "sortablejs": "^1.13.0",
    "source-map-explorer": "^2.5.2",
    "styled-components": "^5.2.3",
    "styled-media-query": "^2.1.2",
    "typescript": "~4.2.4",
    "typesync": "^0.8.0",
    "uuid": "^8.3.2",
    "yup": "^0.32.9"
  },
  "devDependencies": {
    "@types/eslint": "^7.2.10",
    "@types/eslint-plugin-prettier": "^3.1.0",
    "@types/express": "^4.17.11",
    "@types/file-saver": "^2.0.2",
    "@types/loadable__component": "^5.13.3",
    "@types/prettier": "2.2.3",
    "@types/qs": "^6.9.6",
    "@types/react-devtools": "^3.6.0",
    "@types/react-responsive": "^8.0.2",
    "@types/react-router-dom": "^5.1.7",
    "@types/sanitize-html": "^2.3.1",
    "@types/snakecase-keys": "^2.1.0",
    "@types/sortablejs": "^1.10.6",
    "@types/uuid": "^8.3.0",
    "@types/yup": "^0.29.11",
    "@typescript-eslint/eslint-plugin": "^4.22.0",
    "@typescript-eslint/parser": "^4.22.0",
    "dotenv": "^8.2.0",
    "eslint": "^7.2.0",
    "eslint-config-airbnb": "18.2.1",
    "eslint-config-prettier": "^8.3.0",
    "eslint-plugin-import": "^2.22.1",
    "eslint-plugin-jsx-a11y": "^6.4.1",
    "eslint-plugin-prettier": "^3.4.0",
    "eslint-plugin-react": "^7.21.5",
    "eslint-plugin-react-hooks": "^1.7.0",
    "prettier": "2.2.1",
  }
}

When heroku deployed an app, heroku remove devDependencies. I think this is the reason. I tried to set YARN_PRODUCTION env as false. Then, I succeeded. But, because devDependencies is installed, bundle size is bigger. I want to avoid it.

How do I handle devDependencies in deploying app using eslint and prettier to heroku?

Answer 1

Just stumbled on this issue and couldn't resolve it after an entire day knocking about the web. Had to disable eslint-webpack-plugin in production builds:

• create file .env.production
• open file and add DISABLE_ESLINT_PLUGIN=true

During CI you can still run yarn lint or whatever your linting script with no problems and avoid this webpack issue that only happens on yarn build

Sources:

• GitHub Issue
• CRA Advanced Configuration
• CRA .env files

Answer 2

Heroku supports custom build script, in which you can set the environment variable directly:

"scripts": {
    ...
    "build": "react-scripts build",
    "heroku-postbuild": "DISABLE_ESLINT_PLUGIN=true react-scripts build"
  },

piouson's answer does the job, however i find it cleaner to use the following solution as it is (at least I believe) Heroku-specific problem and .env.production file could influence other potential production servers.