.eslintrc.js

/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you 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 { readdirSync } = require('fs');
const { resolve } = require('path');

const APACHE_2_0_LICENSE_HEADER = `
/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you 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 ELASTIC_LICENSE_HEADER = `
/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License;
 * you may not use this file except in compliance with the Elastic License.
 */
`;

module.exports = {
  root: true,

  extends: ['@elastic/eslint-config-kibana', 'plugin:@elastic/eui/recommended'],

  overrides: [
    /**
     * Temporarily disable some react rules for specific plugins, remove in separate PRs
     */
    {
      files: ['packages/kbn-ui-framework/**/*.{js,ts,tsx}'],
      rules: {
        'jsx-a11y/no-onchange': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/data/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/expressions/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/kbn_vislib_vis_types/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/kibana/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/rules-of-hooks': 'off',
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/tile_map/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/vis_type_markdown/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/vis_type_metric/**/*.{js,ts,tsx}'],
      rules: {
        'jsx-a11y/click-events-have-key-events': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/vis_type_table/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/legacy/core_plugins/vis_type_vega/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/legacy/ui/public/vis/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/plugins/es_ui_shared/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/plugins/eui_utils/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/plugins/kibana_react/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/rules-of-hooks': 'off',
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['src/plugins/kibana_utils/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/canvas/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
        'jsx-a11y/click-events-have-key-events': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/cross_cluster_replication/**/*.{js,ts,tsx}'],
      rules: {
        'jsx-a11y/click-events-have-key-events': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/index_management/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
        'react-hooks/rules-of-hooks': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/infra/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
        'react-hooks/rules-of-hooks': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/lens/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
        'react-hooks/rules-of-hooks': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/ml/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/monitoring/**/*.{js,ts,tsx}'],
      rules: {
        'jsx-a11y/click-events-have-key-events': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/snapshot_restore/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/uptime/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/exhaustive-deps': 'off',
        'react-hooks/rules-of-hooks': 'off',
      },
    },
    {
      files: ['x-pack/legacy/plugins/watcher/**/*.{js,ts,tsx}'],
      rules: {
        'react-hooks/rules-of-hooks': 'off',
        'react-hooks/exhaustive-deps': 'off',
      },
    },

    /**
     * Prettier
     */
    {
      files: [
        '.eslintrc.js',
        'packages/kbn-utility-types/**/*',
        'packages/kbn-eslint-plugin-eslint/**/*',
        'packages/kbn-config-schema/**/*',
        'packages/kbn-pm/**/*',
        'packages/kbn-es/**/*',
        'packages/elastic-datemath/**/*',
        'packages/kbn-i18n/**/*',
        'packages/kbn-dev-utils/**/*',
        'packages/kbn-plugin-helpers/**/*',
        'packages/kbn-plugin-generator/**/*',
        'packages/kbn-test-subj-selector/**/*',
        'packages/kbn-test/**/*',
        'packages/kbn-eslint-import-resolver-kibana/**/*',
        'src/legacy/server/saved_objects/**/*',
        'x-pack/legacy/plugins/apm/**/*',
        'x-pack/legacy/plugins/canvas/**/*',
        '**/*.{ts,tsx}',
        'src/legacy/core_plugins/metrics/**/*.js',
      ],
      plugins: ['prettier'],
      rules: Object.assign(
        {
          'prettier/prettier': [
            'error',
            {
              endOfLine: 'auto',
            },
          ],
        },
        require('eslint-config-prettier').rules,
        require('eslint-config-prettier/react').rules
      ),
    },

    /**
     * Files that require Apache 2.0 headers, settings
     * are overridden below for files that require Elastic
     * Licence headers
     */
    {
      files: ['**/*.{js,ts,tsx}'],
      rules: {
        '@kbn/eslint/require-license-header': [
          'error',
          {
            license: APACHE_2_0_LICENSE_HEADER,
          },
        ],
        '@kbn/eslint/disallow-license-headers': [
          'error',
          {
            licenses: [ELASTIC_LICENSE_HEADER],
          },
        ],
      },
    },

    /**
     * Files that require Elastic license headers instead of Apache 2.0 header
     */
    {
      files: ['x-pack/**/*.{js,ts,tsx}'],
      rules: {
        '@kbn/eslint/require-license-header': [
          'error',
          {
            license: ELASTIC_LICENSE_HEADER,
          },
        ],
        '@kbn/eslint/disallow-license-headers': [
          'error',
          {
            licenses: [APACHE_2_0_LICENSE_HEADER],
          },
        ],
      },
    },

    /**
     * Restricted paths
     */
    {
      files: ['**/*.{js,ts,tsx}'],
      rules: {
        '@kbn/eslint/no-restricted-paths': [
          'error',
          {
            basePath: __dirname,
            zones: [
              {
                target: [
                  'src/legacy/**/*',
                  'x-pack/**/*',
                  '!x-pack/**/*.test.*',
                  'src/plugins/**/(public|server)/**/*',
                  'src/core/(public|server)/**/*',
                ],
                from: [
                  'src/core/public/**/*',
                  '!src/core/public/index.ts',
                  '!src/core/public/mocks.ts',
                  '!src/core/public/*.test.mocks.ts',
                  '!src/core/public/utils/**/*',

                  'src/core/server/**/*',
                  '!src/core/server/index.ts',
                  '!src/core/server/mocks.ts',
                  '!src/core/server/types.ts',
                  '!src/core/server/test_utils.ts',
                  // for absolute imports until fixed in
                  // https://github.com/elastic/kibana/issues/36096
                  '!src/core/server/types',
                  '!src/core/server/*.test.mocks.ts',

                  'src/plugins/**/public/**/*',
                  '!src/plugins/**/public/index.{js,ts,tsx}',

                  'src/plugins/**/server/**/*',
                  '!src/plugins/**/server/index.{js,ts,tsx}',
                ],
                allowSameFolder: true,
              },
              {
                target: ['src/core/**/*'],
                from: ['x-pack/**/*'],
                errorMessage: 'OSS cannot import x-pack files.',
              },
              {
                target: ['src/core/**/*'],
                from: [
                  'plugins/**/*',
                  'src/plugins/**/*',
                  'src/legacy/core_plugins/**/*',
                  'src/legacy/ui/**/*',
                ],
                errorMessage: 'The core cannot depend on any plugins.',
              },
              {
                from: ['src/legacy/ui/**/*', 'ui/**/*'],
                target: [
                  'test/plugin_functional/plugins/**/public/np_ready/**/*',
                  'test/plugin_functional/plugins/**/server/np_ready/**/*',
                  'src/legacy/core_plugins/**/public/np_ready/**/*',
                  'src/legacy/core_plugins/**/server/np_ready/**/*',
                  'x-pack/legacy/plugins/**/public/np_ready/**/*',
                  'x-pack/legacy/plugins/**/server/np_ready/**/*',
                ],
                allowSameFolder: true,
                errorMessage:
                  'NP-ready code should not import from /src/legacy/ui/** folder. ' +
                  'Instead of importing from /src/legacy/ui/** deeply within a np_ready folder, ' +
                  'import those things once at the top level of your plugin and pass those down, just ' +
                  'like you pass down `core` and `plugins` objects.',
              },
            ],
          },
        ],
      },
    },

    /**
     * Allow default exports
     */
    {
      files: [
        'x-pack/test/functional/apps/**/*.js',
        'x-pack/legacy/plugins/apm/**/*.js',
        'test/*/config.ts',
        'test/*/{tests,test_suites,apis,apps}/**/*',
        'test/visual_regression/tests/**/*',
        'x-pack/test/*/{tests,test_suites,apis,apps}/**/*',
        'x-pack/test/*/*config.*ts',
        'x-pack/test/saved_object_api_integration/*/apis/**/*',
        'x-pack/test/ui_capabilities/*/tests/**/*',
      ],
      rules: {
        'import/no-default-export': 'off',
        'import/no-named-as-default': 'off',
      },
    },

    /**
     * Files that are allowed to import webpack-specific stuff
     */
    {
      files: [
        '**/public/**/*.js',
        '**/webpackShims/**/*.js',
        'packages/kbn-ui-framework/doc_site/src/**/*.js',
        'src/fixtures/**/*.js', // TODO: this directory needs to be more obviously "public" (or go away)
      ],
      settings: {
        // instructs import/no-extraneous-dependencies to treat modules
        // in plugins/ or ui/ namespace as "core modules" so they don't
        // trigger failures for not being listed in package.json
        'import/core-modules': [
          'plugins',
          'legacy/ui',
          'uiExports',
          // TODO: Remove once https://github.com/benmosher/eslint-plugin-import/issues/1374 is fixed
          'querystring',
        ],

        'import/resolver': {
          '@kbn/eslint-import-resolver-kibana': {
            forceNode: false,
            rootPackageName: 'kibana',
            kibanaPath: '.',
            pluginMap: readdirSync(resolve(__dirname, 'x-pack/legacy/plugins')).reduce(
              (acc, name) => {
                if (!name.startsWith('_')) {
                  acc[name] = `x-pack/legacy/plugins/${name}`;
                }
                return acc;
              },
              {}
            ),
          },
        },
      },
    },

    /**
     * Files that ARE NOT allowed to use devDependencies
     */
    {
      files: [
        'packages/kbn-ui-framework/**/*.js',
        'x-pack/**/*.js',
        'packages/kbn-interpreter/**/*.js',
      ],
      rules: {
        'import/no-extraneous-dependencies': [
          'error',
          {
            devDependencies: false,
            peerDependencies: true,
          },
        ],
      },
    },

    /**
     * Files that ARE allowed to use devDependencies
     */
    {
      files: [
        'packages/kbn-ui-framework/**/*.test.js',
        'packages/kbn-ui-framework/doc_site/**/*.js',
        'packages/kbn-ui-framework/generator-kui/**/*.js',
        'packages/kbn-ui-framework/Gruntfile.js',
        'packages/kbn-es/src/**/*.js',
        'packages/kbn-interpreter/tasks/**/*.js',
        'packages/kbn-interpreter/src/plugin/**/*.js',
        'x-pack/{dev-tools,tasks,scripts,test,build_chromium}/**/*.js',
        'x-pack/**/{__tests__,__test__,__jest__,__fixtures__,__mocks__}/**/*.js',
        'x-pack/**/*.test.js',
        'x-pack/test_utils/**/*',
        'x-pack/gulpfile.js',
        'x-pack/legacy/plugins/apm/public/utils/testHelpers.js',
      ],
      rules: {
        'import/no-extraneous-dependencies': [
          'error',
          {
            devDependencies: true,
            peerDependencies: true,
          },
        ],
      },
    },

    /**
     * Files that run BEFORE node version check
     */
    {
      files: ['scripts/**/*.js', 'src/setup_node_env/**/*.js'],
      rules: {
        'import/no-commonjs': 'off',
        'prefer-object-spread/prefer-object-spread': 'off',
        'no-var': 'off',
        'prefer-const': 'off',
        'prefer-destructuring': 'off',
        'no-restricted-syntax': [
          'error',
          'ImportDeclaration',
          'ExportNamedDeclaration',
          'ExportDefaultDeclaration',
          'ExportAllDeclaration',
          'ArrowFunctionExpression',
          'AwaitExpression',
          'ClassDeclaration',
          'RestElement',
          'SpreadElement',
          'YieldExpression',
          'VariableDeclaration[kind="const"]',
          'VariableDeclaration[kind="let"]',
          'VariableDeclarator[id.type="ArrayPattern"]',
          'VariableDeclarator[id.type="ObjectPattern"]',
        ],
      },
    },

    /**
     * Files that run in the browser with only node-level transpilation
     */
    {
      files: [
        'test/functional/services/lib/web_element_wrapper/scroll_into_view_if_necessary.js',
        '**/browser_exec_scripts/**/*.js',
      ],
      rules: {
        'prefer-object-spread/prefer-object-spread': 'off',
        'no-var': 'off',
        'prefer-const': 'off',
        'prefer-destructuring': 'off',
        'no-restricted-syntax': [
          'error',
          'ArrowFunctionExpression',
          'AwaitExpression',
          'ClassDeclaration',
          'ImportDeclaration',
          'RestElement',
          'SpreadElement',
          'YieldExpression',
          'VariableDeclaration[kind="const"]',
          'VariableDeclaration[kind="let"]',
          'VariableDeclarator[id.type="ArrayPattern"]',
          'VariableDeclarator[id.type="ObjectPattern"]',
        ],
      },
    },

    /**
     * Files that run AFTER node version check
     * and are not also transpiled with babel
     */
    {
      files: [
        '.eslintrc.js',
        '**/webpackShims/**/*.js',
        'packages/kbn-plugin-generator/**/*.js',
        'packages/kbn-plugin-helpers/**/*.js',
        'packages/kbn-eslint-import-resolver-kibana/**/*.js',
        'packages/kbn-eslint-plugin-eslint/**/*',
        'x-pack/gulpfile.js',
        'x-pack/dev-tools/mocha/setup_mocha.js',
        'x-pack/scripts/*.js',
      ],
      rules: {
        'import/no-commonjs': 'off',
        'prefer-object-spread/prefer-object-spread': 'off',
        'no-restricted-syntax': [
          'error',
          'ImportDeclaration',
          'ExportNamedDeclaration',
          'ExportDefaultDeclaration',
          'ExportAllDeclaration',
        ],
      },
    },

    /**
     * Jest specific rules
     */
    {
      files: ['**/*.test.{js,ts,tsx}'],
      rules: {
        'jest/valid-describe': 'error',
      },
    },

    /**
     * APM overrides
     */
    {
      files: ['x-pack/legacy/plugins/apm/**/*.js'],
      rules: {
        'no-unused-vars': ['error', { ignoreRestSiblings: true }],
        'no-console': ['warn', { allow: ['error'] }],
      },
    },
    {
      plugins: ['react-hooks'],
      files: ['x-pack/legacy/plugins/apm/**/*.{ts,tsx}'],
      rules: {
        'react-hooks/rules-of-hooks': 'error', // Checks rules of Hooks
        'react-hooks/exhaustive-deps': ['error', { additionalHooks: '^useFetcher$' }],
      },
    },

    /**
     * GIS overrides
     */
    {
      files: ['x-pack/legacy/plugins/maps/**/*.js'],
      rules: {
        'react/prefer-stateless-function': [0, { ignorePureComponents: false }],
      },
    },

    /**
     * Graph overrides
     */
    {
      files: ['x-pack/legacy/plugins/graph/**/*.js'],
      globals: {
        angular: true,
        $: true,
      },
      rules: {
        'block-scoped-var': 'off',
        camelcase: 'off',
        eqeqeq: 'off',
        'guard-for-in': 'off',
        'new-cap': 'off',
        'no-loop-func': 'off',
        'no-redeclare': 'off',
        'no-shadow': 'off',
        'no-unused-vars': 'off',
        'one-var': 'off',
      },
    },

    /**
     * ML overrides
     */
    {
      files: ['x-pack/legacy/plugins/ml/**/*.js'],
      rules: {
        'no-shadow': 'error',
      },
    },

    /**
     * SIEM overrides
     */
    {
      // front end typescript and javascript files only
      files: ['x-pack/legacy/plugins/siem/public/**/*.{js,ts,tsx}'],
      rules: {
        'import/no-nodejs-modules': 'error',
        'no-restricted-imports': [
          'error',
          {
            // prevents UI code from importing server side code and then webpack including it when doing builds
            patterns: ['**/server/*'],
          },
        ],
      },
    },
    {
      // typescript only for front and back end
      files: ['x-pack/legacy/plugins/siem/**/*.{ts,tsx}'],
      rules: {
        // This will be turned on after bug fixes are complete
        // '@typescript-eslint/explicit-member-accessibility': 'warn',
        '@typescript-eslint/no-this-alias': 'error',
        '@typescript-eslint/no-explicit-any': 'error',
        '@typescript-eslint/no-useless-constructor': 'error',
        // This will be turned on after bug fixes are complete
        // '@typescript-eslint/no-object-literal-type-assertion': 'warn',
        '@typescript-eslint/unified-signatures': 'error',

        // eventually we want this to be a warn and then an error since this is a recommended linter rule
        // for now, keeping it commented out to avoid too much IDE noise until the other linter issues
        // are fixed in the next release or two
        // '@typescript-eslint/explicit-function-return-type': 'warn',

        // these rules cannot be turned on and tested at the moment until this issue is resolved:
        // https://github.com/prettier/prettier-eslint/issues/201
        // '@typescript-eslint/await-thenable': 'error',
        // '@typescript-eslint/no-non-null-assertion': 'error'
        // '@typescript-eslint/no-unnecessary-type-assertion': 'error',
        // '@typescript-eslint/no-unused-vars': 'error',
        // '@typescript-eslint/prefer-includes': 'error',
        // '@typescript-eslint/prefer-string-starts-ends-with': 'error',
        // '@typescript-eslint/promise-function-async': 'error',
        // '@typescript-eslint/prefer-regexp-exec': 'error',
        // '@typescript-eslint/promise-function-async': 'error',
        // '@typescript-eslint/require-array-sort-compare': 'error',
        // '@typescript-eslint/restrict-plus-operands': 'error',
        // '@typescript-eslint/unbound-method': 'error',
      },
    },
    {
      // typescript and javascript for front and back end
      files: ['x-pack/legacy/plugins/siem/**/*.{js,ts,tsx}'],
      plugins: ['eslint-plugin-node', 'react'],
      env: {
        mocha: true,
        jest: true,
      },
      rules: {
        'accessor-pairs': 'error',
        'array-callback-return': 'error',
        'no-array-constructor': 'error',
        // This will be turned on after bug fixes are mostly completed
        // 'arrow-body-style': ['warn', 'as-needed'],
        complexity: 'warn',
        // This will be turned on after bug fixes are mostly completed
        // 'consistent-return': 'warn',
        // This will be turned on after bug fixes are mostly completed
        // 'func-style': ['warn', 'expression'],
        // These will be turned on after bug fixes are mostly completed and we can
        // run a fix-lint
        /*
        'import/order': [
          'warn',
          {
            groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
            'newlines-between': 'always',
          },
        ],
        */
        'node/no-deprecated-api': 'error',
        'no-bitwise': 'error',
        'no-continue': 'error',
        'no-dupe-keys': 'error',
        'no-duplicate-case': 'error',
        'no-duplicate-imports': 'error',
        'no-empty-character-class': 'error',
        'no-empty-pattern': 'error',
        'no-ex-assign': 'error',
        'no-extend-native': 'error',
        'no-extra-bind': 'error',
        'no-extra-boolean-cast': 'error',
        'no-extra-label': 'error',
        'no-floating-decimal': 'error',
        'no-func-assign': 'error',
        'no-implicit-globals': 'error',
        'no-implied-eval': 'error',
        'no-invalid-regexp': 'error',
        'no-inner-declarations': 'error',
        'no-lone-blocks': 'error',
        'no-multi-assign': 'error',
        'no-misleading-character-class': 'error',
        'no-new-symbol': 'error',
        'no-obj-calls': 'error',
        'no-param-reassign': 'error',
        'no-process-exit': 'error',
        'no-prototype-builtins': 'error',
        'no-return-await': 'error',
        'no-self-compare': 'error',
        'no-shadow-restricted-names': 'error',
        'no-sparse-arrays': 'error',
        'no-this-before-super': 'error',
        'no-undef': 'error',
        'no-unreachable': 'error',
        'no-unsafe-finally': 'error',
        'no-useless-call': 'error',
        // This will be turned on after bug fixes are mostly complete
        // 'no-useless-catch': 'warn',
        'no-useless-concat': 'error',
        'no-useless-computed-key': 'error',
        // This will be turned on after bug fixes are mostly complete
        // 'no-useless-escape': 'warn',
        'no-useless-rename': 'error',
        // This will be turned on after bug fixes are mostly complete
        // 'no-useless-return': 'warn',
        // This will be turned on after bug fixers are mostly complete
        // 'no-void': 'warn',
        'one-var-declaration-per-line': 'error',
        'prefer-object-spread': 'error',
        'prefer-promise-reject-errors': 'error',
        'prefer-rest-params': 'error',
        'prefer-spread': 'error',
        // This style will be turned on after most bugs are fixed
        // 'prefer-template': 'warn',
        // This style will be turned on after most bugs are fixed
        // quotes: ['warn', 'single', { avoidEscape: true }],
        'react/boolean-prop-naming': 'error',
        'react/button-has-type': 'error',
        'react/forbid-dom-props': 'error',
        'react/no-access-state-in-setstate': 'error',
        // This style will be turned on after most bugs are fixed
        // 'react/no-children-prop': 'warn',
        'react/no-danger-with-children': 'error',
        'react/no-deprecated': 'error',
        'react/no-did-mount-set-state': 'error',
        // Re-enable once we have better options per this issue:
        // https://github.com/airbnb/javascript/issues/1875
        // 'react/no-did-update-set-state': 'error',
        'react/no-direct-mutation-state': 'error',
        'react/no-find-dom-node': 'error',
        'react/no-redundant-should-component-update': 'error',
        'react/no-render-return-value': 'error',
        'react/no-typos': 'error',
        'react/no-string-refs': 'error',
        'react/no-this-in-sfc': 'error',
        'react/no-unescaped-entities': 'error',
        'react/no-unsafe': 'error',
        'react/no-unused-prop-types': 'error',
        'react/no-unused-state': 'error',
        // will introduced after the other warns are fixed
        // 'react/sort-comp': 'error',
        'react/void-dom-elements-no-children': 'error',
        // will introduced after the other warns are fixed
        // 'react/jsx-no-bind': 'error',
        'react/jsx-no-comment-textnodes': 'error',
        'react/jsx-no-literals': 'error',
        'react/jsx-no-target-blank': 'error',
        'react/jsx-fragments': 'error',
        'react/jsx-sort-default-props': 'error',
        // might be introduced after the other warns are fixed
        // 'react/jsx-sort-props': 'error',
        'react/jsx-tag-spacing': 'error',
        // might be introduced after the other warns are fixed
        'react-hooks/exhaustive-deps': 'off',
        'require-atomic-updates': 'error',
        'rest-spread-spacing': ['error', 'never'],
        'symbol-description': 'error',
        'template-curly-spacing': 'error',
        'vars-on-top': 'error',
      },
    },

    /**
     * Lens overrides
     */
    {
      files: ['x-pack/legacy/plugins/lens/**/*.ts', 'x-pack/legacy/plugins/lens/**/*.tsx'],
      rules: {
        '@typescript-eslint/no-explicit-any': 'error',
      },
    },

    /**
     * disable jsx-a11y for kbn-ui-framework
     */
    {
      files: ['packages/kbn-ui-framework/**/*.js'],
      rules: {
        'jsx-a11y/click-events-have-key-events': 'off',
        'jsx-a11y/anchor-has-content': 'off',
        'jsx-a11y/tabindex-no-positive': 'off',
        'jsx-a11y/label-has-associated-control': 'off',
        'jsx-a11y/aria-role': 'off',
      },
    },

    /**
     * Monitoring overrides
     */
    {
      files: ['x-pack/legacy/plugins/monitoring/**/*.js'],
      rules: {
        'block-spacing': ['error', 'always'],
        curly: ['error', 'all'],
        'no-unused-vars': ['error', { args: 'all', argsIgnorePattern: '^_' }],
        'no-else-return': 'error',
      },
    },
    {
      files: ['x-pack/legacy/plugins/monitoring/public/**/*.js'],
      env: { browser: true },
    },

    /**
     * Canvas overrides
     */
    {
      files: ['x-pack/legacy/plugins/canvas/**/*.js'],
      rules: {
        radix: 'error',
        curly: ['error', 'all'],

        // module importing
        'import/order': [
          'error',
          {
            groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
          },
        ],
        'import/extensions': ['error', 'never', { json: 'always', less: 'always', svg: 'always' }],

        // react
        'react/no-did-mount-set-state': 'error',
        'react/no-did-update-set-state': 'error',
        'react/no-multi-comp': ['error', { ignoreStateless: true }],
        'react/self-closing-comp': 'error',
        'react/sort-comp': 'error',
        'react/jsx-boolean-value': 'error',
        'react/jsx-wrap-multilines': 'error',
        'react/no-unescaped-entities': ['error', { forbid: ['>', '}'] }],
        'react/forbid-elements': [
          'error',
          {
            forbid: [
              {
                element: 'EuiConfirmModal',
                message: 'Use <ConfirmModal> instead',
              },
              {
                element: 'EuiPopover',
                message: 'Use <Popover> instead',
              },
              {
                element: 'EuiIconTip',
                message: 'Use <TooltipIcon> instead',
              },
            ],
          },
        ],
      },
    },
    {
      files: [
        'x-pack/legacy/plugins/canvas/gulpfile.js',
        'x-pack/legacy/plugins/canvas/scripts/*.js',
        'x-pack/legacy/plugins/canvas/tasks/*.js',
        'x-pack/legacy/plugins/canvas/tasks/**/*.js',
        'x-pack/legacy/plugins/canvas/__tests__/**/*.js',
        'x-pack/legacy/plugins/canvas/**/{__tests__,__test__,__jest__,__fixtures__,__mocks__}/**/*.js',
      ],
      rules: {
        'import/no-extraneous-dependencies': [
          'error',
          {
            devDependencies: true,
            peerDependencies: true,
          },
        ],
      },
    },
    {
      files: ['x-pack/legacy/plugins/canvas/canvas_plugin_src/**/*.js'],
      globals: { canvas: true, $: true },
      rules: {
        'import/no-unresolved': [
          'error',
          {
            ignore: ['!!raw-loader.+.svg$'],
          },
        ],
      },
    },
    {
      files: ['x-pack/legacy/plugins/canvas/public/**/*.js'],
      env: {
        browser: true,
      },
    },
    {
      files: ['x-pack/legacy/plugins/canvas/canvas_plugin_src/lib/flot-charts/**/*.js'],
      env: {
        jquery: true,
      },
    },

    /**
     * TSVB overrides
     */
    {
      files: ['src/legacy/core_plugins/metrics/**/*.js'],
      excludedFiles: 'src/legacy/core_plugins/metrics/index.js',
      rules: {
        'import/no-default-export': 'error',
      },
    },
  ],
};