.eslintrc.js

"use strict";

module.exports = {
  "plugins": [
    "react"
  ],
  "globals": {
    "exports": true,
    "isWorker": true,
    "isReplaying": true,
    "loader": true,
    "module": true,
    "reportError": true,
    "require": true,
  },
  "overrides": [{
    "files": [
      "client/framework/**",
    ],
    "rules": {
      "no-return-assign": "off",
    }
  }, {
    "files": [
      "client/shared/*.jsm",
    ],
    "rules": {
      "camelcase": "off",
    }
  }, {
    "files": [
      "client/framework/**",
      "client/shared/*.jsm",
      "client/shared/widgets/*.jsm",
      "client/storage/VariablesView.jsm",
    ],
    "rules": {
      "consistent-return": "off",
    }
  }, {
    "files": [
      "client/framework/**",
    ],
    "rules": {
      "max-nested-callbacks": "off",
    }
  }, {
    "files": [
      "client/framework/**",
      "client/shared/*.jsm",
      "client/shared/widgets/*.jsm",
      "client/storage/VariablesView.jsm",
      "shared/webconsole/test/*.html",
    ],
    "rules": {
      "mozilla/no-aArgs": "off",
    }
  }, {
    "files": [
      "client/framework/test/**",
    ],
    "rules": {
      "mozilla/var-only-at-top-level": "off",
    }
  }, {
    "files": [
      "client/framework/**",
      "client/shared/widgets/*.jsm",
      "client/storage/VariablesView.jsm",
    ],
    "rules": {
      "no-shadow": "off",
    }
  }, {
    "files": [
      "client/framework/**",
    ],
    "rules": {
      "strict": "off",
    }
  }, {
    // For all head*.js files, turn off no-unused-vars at a global level
    "files": [
      "**/head*.js",
    ],
    "rules": {
      "no-unused-vars": ["error", {"args": "none", "vars": "local"}],
    }
  }, {
    // For all server files, prevent requiring devtools/client modules.
    "files": [
      "server/**",
      // The rule also applies to all `shared` files, with the exception of
      // shared/fronts.
      // This first pattern matches files in a shared subfolder other than "fronts".
      "shared/!(fronts)/**",
      // This second pattern matches files directly under shared.
      "shared/*.**",
    ],
    "rules": {
      "mozilla/reject-some-requires": ["error", "^(resource\://)?devtools/client"],
    }
  }, {
    // Cu, Cc etc... are not available in most devtools modules loaded by require.
    "files": [
      "**"
    ],
    "excludedFiles": [
      // Enable the rule on JSM, test head files and some specific files.
      "**/*.jsm",
      "**/test/**/head.js",
      "**/test/**/shared-head.js",
      "client/debugger/test/mochitest/code_frame-script.js",
      "client/inspector/animation-old/test/doc_frame_script.js",
      "client/inspector/animation/test/doc_frame_script.js",
      "client/inspector/rules/test/doc_frame_script.js",
      "client/inspector/shared/test/doc_frame_script.js",
      "client/jsonview/converter-observer.js",
      "client/jsonview/test/doc_frame_script.js",
      "client/responsive.html/browser/content.js",
      "client/shared/browser-loader.js",
      "server/actors/webconsole/content-process-forward.js",
      "server/actors/worker/service-worker-process.js",
      "server/startup/content-process.js",
      "server/startup/frame.js",
      "shared/base-loader.js",
      "shared/worker/loader.js",
      "startup/aboutdebugging-registration.js",
      "startup/aboutdevtools/aboutdevtools-registration.js",
      "startup/aboutdevtoolstoolbox-registration.js",
      "startup/devtools-startup.js",
    ],
    "rules": {
      "mozilla/no-define-cc-etc": "off",
    }
  }, {
    // All DevTools files should avoid relative paths.
    "files": [
      "**"
    ],
    "excludedFiles": [
      // Debugger modules have a custom bundling logic which relies on relative
      // paths.
      "client/debugger/**",
      // `client/shared/build` contains node helpers to build the debugger and
      // not devtools modules.
      "client/shared/build/**",
    ],
    "rules": {
      "mozilla/reject-relative-requires": "error",
    }
  }],
  "rules": {
    // These are the rules that have been configured so far to match the
    // devtools coding style.

    // Rules from the mozilla plugin
    "mozilla/no-aArgs": "error",
    // See bug 1224289.
    "mozilla/reject-importGlobalProperties": ["error", "everything"],
    // devtools/shared/platform is special; see the README.md in that
    // directory for details.  We reject requires using explicit
    // subdirectories of this directory.
    "mozilla/reject-some-requires": ["error", "^devtools/shared/platform/(chome|content)/"],
    "mozilla/var-only-at-top-level": "error",
    "mozilla/use-chromeutils-import": ["error", {allowCu: true}],

    // Rules from the React plugin
    "react/display-name": "error",
    "react/no-danger": "error",
    "react/no-did-mount-set-state": "error",
    "react/no-did-update-set-state": "error",
    "react/no-direct-mutation-state": "error",
    "react/no-unknown-property": "error",
    "react/prefer-es6-class": ["off", "always"],
    "react/prop-types": "error",
    "react/sort-comp": ["error", {
      order: [
        "static-methods",
        "lifecycle",
        "everything-else",
        "render"
      ],
      groups: {
        lifecycle: [
          "displayName",
          "propTypes",
          "contextTypes",
          "childContextTypes",
          "mixins",
          "statics",
          "defaultProps",
          "constructor",
          "getDefaultProps",
          "getInitialState",
          "state",
          "getChildContext",
          "componentWillMount",
          "componentDidMount",
          "componentWillReceiveProps",
          "shouldComponentUpdate",
          "componentWillUpdate",
          "componentDidUpdate",
          "componentWillUnmount"
        ]
      }
    }],

    // Disallow using variables outside the blocks they are defined (especially
    // since only let and const are used, see "no-var").
    "block-scoped-var": "error",
    // Require camel case names
    "camelcase": ["error", { "properties": "never" }],
    // Warn about cyclomatic complexity in functions.
    // 20 is ESLint's default, and we want to keep it this way to prevent new highly
    // complex functions from being introduced. However, because Mozilla's eslintrc has
    // some other value defined, we need to override it here. See bug 1553449 for more
    // information on complex DevTools functions that are currently excluded.
    "complexity": ["error", 20],
    // Don't warn for inconsistent naming when capturing this (not so important
    // with auto-binding fat arrow functions).
    "consistent-this": "off",
    // Don't require a default case in switch statements. Avoid being forced to
    // add a bogus default when you know all possible cases are handled.
    "default-case": "off",
    // Allow using == instead of ===, in the interest of landing something since
    // the devtools codebase is split on convention here.
    "eqeqeq": "off",
    // Don't require function expressions to have a name.
    // This makes the code more verbose and hard to read. Our engine already
    // does a fantastic job assigning a name to the function, which includes
    // the enclosing function name, and worst case you have a line number that
    // you can just look up.
    "func-names": "off",
    // Allow use of function declarations and expressions.
    "func-style": "off",
    // Only useful in a node environment.
    "handle-callback-err": "off",
    // Maximum depth callbacks can be nested.
    "max-nested-callbacks": ["error", 3],
    // Don't limit the number of parameters that can be used in a function.
    "max-params": "off",
    // Don't limit the maximum number of statement allowed in a function. We
    // already have the complexity rule that's a better measurement.
    "max-statements": "off",
    // Require a capital letter for constructors, only check if all new
    // operators are followed by a capital letter. Don't warn when capitalized
    // functions are used without the new operator.
    "new-cap": ["error", {"capIsNew": false}],
    // Allow use of bitwise operators.
    "no-bitwise": "off",
    // Allow using the console API.
    "no-console": "off",
    // Allow using constant expressions in conditions like while (true)
    "no-constant-condition": "off",
    // Allow use of the continue statement.
    "no-continue": "off",
    // Allow division operators explicitly at beginning of regular expression.
    "no-div-regex": "off",
    // Disallow empty statements. This will report an error for:
    // try { something(); } catch (e) {}
    // but will not report it for:
    // try { something(); } catch (e) { /* Silencing the error because ...*/ }
    // which is a valid use case.
    "no-empty": "error",
    // Disallow adding to native types
    "no-extend-native": "error",
    // Disallow fallthrough of case statements, except if there is a comment.
    "no-fallthrough": "error",
    // Allow comments inline after code.
    "no-inline-comments": "off",
    // Allow mixing regular variable and require declarations (not a node env).
    "no-mixed-requires": "off",
    // Disallow use of multiline strings (use template strings instead).
    "no-multi-str": "error",
    // Allow use of new operator with the require function.
    "no-new-require": "off",
    // Allow reassignment of function parameters.
    "no-param-reassign": "off",
    // Allow string concatenation with __dirname and __filename (not a node env).
    "no-path-concat": "off",
    // Allow use of unary operators, ++ and --.
    "no-plusplus": "off",
    // Allow using process.env (not a node environment).
    "no-process-env": "off",
    // Allow using process.exit (not a node environment).
    "no-process-exit": "off",
    // Disallow usage of __proto__ property.
    "no-proto": "error",
    // Disallow multiple spaces in a regular expression literal.
    "no-regex-spaces": "off",
    // Don't restrict usage of specified node modules (not a node environment).
    "no-restricted-modules": "off",
    // Prevent using some properties
    "no-restricted-properties": ["error", {
      "property": "setupInParent",
      "message": "avoid child/parent communication with setupInParent"
    }],
    // Disallow use of assignment in return statement. It is preferable for a
    // single line of code to have only one easily predictable effect.
    "no-return-assign": "error",
    // Allow use of javascript: urls.
    "no-script-url": "off",
    // Warn about declaration of variables already declared in the outer scope.
    // This isn't an error because it sometimes is useful to use the same name
    // in a small helper function rather than having to come up with another
    // random name.
    // Still, making this a warning can help people avoid being confused.
    "no-shadow": "error",
    // Allow use of synchronous methods (not a node environment).
    "no-sync": "off",
    // Allow the use of ternary operators.
    "no-ternary": "off",
    // Allow dangling underscores in identifiers (for privates).
    "no-underscore-dangle": "off",
    // Allow use of undefined variable.
    "no-undefined": "off",
    // Disallow global and local variables that aren't used, but allow unused
    // function arguments.
    "no-unused-vars": ["error", {"args": "none", "vars": "all"}],
    // Allow using variables before they are defined.
    "no-use-before-define": "off",
    // We use var-only-at-top-level instead of no-var as we allow top level
    // vars.
    "no-var": "off",
    // Allow using TODO/FIXME comments.
    "no-warning-comments": "off",
    // Don't require method and property shorthand syntax for object literals.
    // We use this in the code a lot, but not consistently, and this seems more
    // like something to check at code review time.
    "object-shorthand": "off",
    // Allow more than one variable declaration per function.
    "one-var": "off",
    // Enforce using `let` only when variables are reassigned.
    "prefer-const": ["error", { "destructuring": "all" }],
    // Require use of the second argument for parseInt().
    "radix": "error",
    // Don't require to sort variables within the same declaration block.
    // Anyway, one-var is disabled.
    "sort-vars": "off",
    // Require "use strict" to be defined globally in the script.
    "strict": ["error", "global"],
    // Warn about invalid JSDoc comments.
    // Disabled for now because of https://github.com/eslint/eslint/issues/2270
    // The rule fails on some jsdoc comments like in:
    // devtools/client/webconsole/old/console-output.js
    "valid-jsdoc": "off",
    // Allow vars to be declared anywhere in the scope.
    "vars-on-top": "off",
    // Disallow Yoda conditions (where literal value comes first).
    "yoda": "error",

    // And these are the rules that haven't been discussed so far, and that are
    // disabled for now until we introduce them, one at a time.

    // Require for-in loops to have an if statement.
    "guard-for-in": "off",
    // disallow the use of alert, confirm, and prompt
    "no-alert": "off",
    // disallow comparisons to null without a type-checking operator
    "no-eq-null": "off",
    // disallow overwriting functions written as function declarations
    "no-func-assign": "off",
    // disallow function or variable declarations in nested blocks
    "no-inner-declarations": "off",
    // disallow invalid regular expression strings in the RegExp constructor
    "no-invalid-regexp": "off",
    // disallow irregular whitespace outside of strings and comments
    "no-irregular-whitespace": "off",
    // disallow labels that share a name with a variable
    "no-label-var": "off",
    // disallow unnecessary nested blocks
    "no-lone-blocks": "off",
    // disallow creation of functions within loops
    "no-loop-func": "off",
    // disallow use of new operator when not part of the assignment or
    // comparison
    "no-new": "off",
    // disallow use of new operator for Function object
    "no-new-func": "off",
    // disallow use of the Object constructor
    "no-new-object": "off",
    // disallows creating new instances of String,Number, and Boolean
    "no-new-wrappers": "off",
    // disallow the use of object properties of the global object (Math and
    // JSON) as functions
    "no-obj-calls": "off",
    // disallow use of octal escape sequences in string literals, such as
    // var foo = "Copyright \251";
    "no-octal-escape": "off",
    // disallow use of undefined when initializing variables
    "no-undef-init": "off",
    // disallow usage of expressions in statement position
    "no-unused-expressions": "off",
    // disallow unnecessary concatenation of literals or template literals
    "no-useless-concat": "off",
    // disallow use of void operator
    "no-void": "off",
    // require assignment operator shorthand where possible or prohibit it
    // entirely
    "operator-assignment": "off",
  }
};