.eslintrc

{
    "root": true,
    "plugins": [
        "eslint-plugin",
        "import",
    ],
    "extends": [
        "eslint:recommended",
        "plugin:eslint-plugin/recommended",
        "plugin:import/recommended",
    ],
    "env": {
        "node": true,
        "es6": true,
        "es2017": true,
    },
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 2020,
    },
    "rules": {
        "array-bracket-spacing": [2, "never"],
        "arrow-body-style": [2, "as-needed"],
        "arrow-parens": [2, "always"],
        "arrow-spacing": [2, { "before": true, "after": true }],
        "block-spacing": [2, "always"],
        "brace-style": [2, "1tbs", { "allowSingleLine": true }],
        "comma-dangle": ["error", {
            "arrays": "always-multiline",
            "objects": "always-multiline",
            "imports": "always-multiline",
            "exports": "always-multiline",
            "functions": "always-multiline",
        }],
        "comma-spacing": [2, { "before": false, "after": true }],
        "comma-style": [2, "last"],
        "computed-property-spacing": [2, "never"],
        "curly": [2, "all"],
        "default-case": [2, { "commentPattern": "(?:)" }],
        "default-case-last": [2],
        "default-param-last": [2],
        "dot-location": [2, "property"],
        "dot-notation": [2, { "allowKeywords": true, "allowPattern": "throws" }],
        "eol-last": [2, "always"],
        "eqeqeq": [2, "allow-null"],
        "for-direction": [2],
        "function-call-argument-newline": [2, "consistent"],
        "func-call-spacing": [2, "never"],
        "implicit-arrow-linebreak": [2, "beside"],
        "indent": [2, 2, {
            "SwitchCase": 1,
            "VariableDeclarator": 1,
            "outerIIFEBody": 1,
            "FunctionDeclaration": {
                "parameters": 1,
                "body": 1
            },
            "FunctionExpression": {
                "parameters": 1,
                "body": 1
            },
            "CallExpression": {
                "arguments": 1
            },
            "ArrayExpression": 1,
            "ObjectExpression": 1,
            "ImportDeclaration": 1,
            "flatTernaryExpressions": false,
        }],
        "jsx-quotes": [2, "prefer-double"],
        "key-spacing": [2, {
            "beforeColon": false,
            "afterColon": true,
            "mode": "strict",
        }],
        "keyword-spacing": ["error", {
          "before": true,
          "after": true,
          "overrides": {
            "return": { "after": true },
            "throw": { "after": true },
            "case": { "after": true }
          }
        }],
        "linebreak-style": [2, "unix"],
        "lines-around-directive": [2, {
            "before": "always",
            "after": "always",
        }],
        "max-len": 0,
        "new-parens": 2,
        "no-array-constructor": 2,
        "no-compare-neg-zero": 2,
        "no-cond-assign": [2, "always"],
        "no-extra-parens": 2,
        "no-multiple-empty-lines": [2, { "max": 1, "maxEOF": 1, "maxBOF": 0 }],
        "no-return-assign": [2, "always"],
        "no-trailing-spaces": 2,
        "no-var": 2,
        "object-curly-spacing": [2, "always"],
        "object-shorthand": ["error", "always", {
            "ignoreConstructors": false,
            "avoidQuotes": false,
            "avoidExplicitReturnArrows": true,
        }],
        "one-var": [2, "never"],
        "operator-linebreak": [2, "none", {
            "overrides": {
              "?": "before",
              ":": "before",
              "&&": "before",
              "||": "before",
            },
        }],
        "prefer-const": 2,
        "prefer-object-spread": 2,
        "prefer-rest-params": 2,
        "prefer-template": 2,
        "quote-props": [2, "as-needed", { "keywords": false }],
        "quotes": [2, "single", {
            "allowTemplateLiterals": true,
            "avoidEscape": true,
        }],
        "rest-spread-spacing": [2, "never"],
        "semi": [2, "always"],
        "semi-spacing": [2, { "before": false, "after": true }],
        "semi-style": [2, "last"],
        "space-before-blocks": [2, { "functions": "always", "keywords": "always", "classes": "always" }],
        "space-before-function-paren": ["error", {
            "anonymous": "always",
            "named": "never",
            "asyncArrow": "always",
        }],
        "space-in-parens": [2, "never"],
        "space-infix-ops": [2],
        "space-unary-ops": [2, { "words": true, "nonwords": false }],
        "switch-colon-spacing": [2, { "after": true, "before": false }],
        "template-curly-spacing": [2, "never"],
        "template-tag-spacing": [2, "never"],
        "unicode-bom": [2, "never"],
        "use-isnan": [2, { "enforceForSwitchCase": true }],
        "valid-typeof": [2],
        "wrap-iife": [2, "outside", { "functionPrototypeMethods": true }],
        "wrap-regex": [2],
        "yield-star-spacing": [2, { "before": false, "after": true }],
        "yoda": [2, "never", { "exceptRange": true, "onlyEquality": false }],

        "eslint-plugin/consistent-output": [
            "error",
            "always",
        ],
        "eslint-plugin/meta-property-ordering": "error",
        "eslint-plugin/no-deprecated-context-methods": "error",
        "eslint-plugin/no-deprecated-report-api": "off",
        "eslint-plugin/prefer-replace-text": "error",
        "eslint-plugin/report-message-format": "error",
        "eslint-plugin/require-meta-docs-description": ["error", { "pattern": "^(Enforce|Ensure|Prefer|Forbid).+\\.$" }],
        "eslint-plugin/require-meta-schema": "error",
        "eslint-plugin/require-meta-type": "error",

        // dog fooding
        "import/no-extraneous-dependencies": ["error", {
            "devDependencies": [
                "tests/**",
                "resolvers/*/test/**",
                "scripts/**"
            ],
            "optionalDependencies": false,
            "peerDependencies": true,
            "bundledDependencies": false,
        }],
        "import/unambiguous": "off",
    },

    "settings": {
        "import/resolver": {
            "node": {
                "paths": [
                    "src",
                ],
            },
        },
    },

    "overrides": [
        {
            "files": "scripts/**",
            "rules": {
                "no-console": "off",
            },
        },
        {
            "files": "resolvers/**",
            "env": {
                "es6": false,
            },
        },
        {
            "files": "resolvers/webpack/**",
            "rules": {
                "no-console": 1,
                "prefer-template": 0,
                "prefer-object-spread": 0,
                "prefer-rest-params": 0,
            },
            "env": {
                "es6": true,
            },
        },
        {
            "files": [
                "resolvers/*/test/**/*",
            ],
            "env": {
                "mocha": true,
                "es6": false
            },
        },
        {
            "files": "utils/**",
            "parserOptions": {
                "ecmaVersion": 6,
            },
            "rules": {
                "comma-dangle": ["error", {
                    "arrays": "always-multiline",
                    "objects": "always-multiline",
                    "imports": "always-multiline",
                    "exports": "always-multiline",
                    "functions": "never"
                }],
                "prefer-object-spread": "off",
                "prefer-template": "off",
                "no-console": 1,
            },
        },
        {
            "files": "tests/**",
            "env": {
                "mocha": true,
            },
            "rules": {
                "max-len": 0,
                "import/default": 0,
            },
        },
    ],
}