Ignore home config from disableWhenNoEslintConfig (#778)

* Ignore home config from disableWhenNoEslintConfig

* Move isConfigAtHomeRoot to its own file

It needs to be used in both worker and non-worker, so it’s easiest
to just put it in its own file for now until we re-structure.

* Extract copyFileToTempDir as test helper function

* Move temp dir creation to `copyFileToTempDir`

lib/is-config-at-home-root.js

@@ -0,0 +1,28 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.isConfigAtHomeRoot = isConfigAtHomeRoot;
+
+var _userHome = require('user-home');
+
+var _userHome2 = _interopRequireDefault(_userHome);
+
+var _path = require('path');
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * Check if a config is directly inside a user's home directory.
+ * Such config files are used by ESLint as a fallback, only for situations
+ * when there is no other config file between a file being linted and root.
+ *
+ * @param  {string}  configPath - The path of the config file being checked
+ * @return {Boolean}              True if the file is directly in the current user's home
+ */
+/* eslint-disable import/prefer-default-export */
+
+function isConfigAtHomeRoot(configPath) {
+  return (0, _path.dirname)(configPath) === _userHome2.default;
+}

lib/main.js

@@ -11,6 +11,8 @@ var _helpers = require('./helpers');
 
 var _workerHelpers = require('./worker-helpers');
 
+var _isConfigAtHomeRoot = require('./is-config-at-home-root');
+
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
 function _asyncToGenerator(fn) { return function () { var gen = fn.apply(this, arguments); return new Promise(function (resolve, reject) { function step(key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { return Promise.resolve(value).then(function (value) { step("next", value); }, function (err) { step("throw", err); }); } } return step("next"); }); }; }
@@ -58,7 +60,8 @@ module.exports = {
           // Do not try to fix if linting should be disabled
           const fileDir = _path2.default.dirname(filePath);
           const configPath = (0, _workerHelpers.getConfigPath)(fileDir);
-          if (configPath === null && disableWhenNoEslintConfig) return;
+          const noProjectConfig = configPath === null || (0, _isConfigAtHomeRoot.isConfigAtHomeRoot)(configPath);
+          if (noProjectConfig && disableWhenNoEslintConfig) return;
 
           this.worker.request('job', {
             type: 'fix',

lib/worker.js

@@ -15,6 +15,8 @@ var _workerHelpers = require('./worker-helpers');
 
 var Helpers = _interopRequireWildcard(_workerHelpers);
 
+var _isConfigAtHomeRoot = require('./is-config-at-home-root');
+
 function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
 
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
@@ -32,7 +34,8 @@ const ignoredMessages = [
 'File ignored by default.  Use a negated ignore pattern (like "--ignore-pattern \'!<relative' + '/path/to/filename>\'") to override.', 'File ignored by default. Use "--ignore-pattern \'!node_modules/*\'" to override.', 'File ignored by default. Use "--ignore-pattern \'!bower_components/*\'" to override.'];
 
 function lintJob(argv, contents, eslint, configPath, config) {
-  if (configPath === null && config.disableWhenNoEslintConfig) {
+  const noProjectConfig = configPath === null || (0, _isConfigAtHomeRoot.isConfigAtHomeRoot)(configPath);
+  if (noProjectConfig && config.disableWhenNoEslintConfig) {
     return [];
   }
   eslint.execute(argv, contents);

package.json

@@ -111,7 +111,8 @@
     "eslint": "^3.6.0",
     "eslint-rule-documentation": "^1.0.0",
     "process-communication": "^1.1.0",
-    "resolve-env": "^1.0.0"
+    "resolve-env": "^1.0.0",
+    "user-home": "^2.0.0"
   },
   "devDependencies": {
     "babel-cli": "^6.18.0",

spec/fixtures/files/badInline.js

@@ -0,0 +1,3 @@
+/* eslint no-undef: error */
+
+foo = 42;

spec/linter-eslint-spec.js

@@ -10,6 +10,7 @@ const fixturesDir = path.join(__dirname, 'fixtures')
 
 const goodPath = path.join(fixturesDir, 'files', 'good.js')
 const badPath = path.join(fixturesDir, 'files', 'bad.js')
+const badInlinePath = path.join(fixturesDir, 'files', 'badInline.js')
 const emptyPath = path.join(fixturesDir, 'files', 'empty.js')
 const fixPath = path.join(fixturesDir, 'files', 'fix.js')
 const configPath = path.join(fixturesDir, 'configs', '.eslintrc.yml')
@@ -24,6 +25,20 @@ const modifiedIgnoreSpacePath = path.join(fixturesDir,
   'modified-ignore-rule', 'foo-space.js')
 const endRangePath = path.join(fixturesDir, 'end-range', 'no-unreachable.js')
 
+function copyFileToTempDir(fileToCopyPath) {
+  return new Promise((resolve) => {
+    const tempFixtureDir = fs.mkdtempSync(tmpdir() + path.sep)
+    const tempFixturePath = path.join(tempFixtureDir, path.basename(fileToCopyPath))
+    const wr = fs.createWriteStream(tempFixturePath)
+    wr.on('close', () =>
+      atom.workspace.open(tempFixturePath).then((openEditor) => {
+        resolve({ openEditor, tempDir: tempFixtureDir })
+      })
+    )
+    fs.createReadStream(fileToCopyPath).pipe(wr)
+  })
+}
+
 describe('The eslint provider for Linter', () => {
   const { spawnWorker } = require('../lib/helpers')
 
@@ -361,4 +376,80 @@ describe('The eslint provider for Linter', () => {
       )
     )
   )
+
+  describe('when setting `disableWhenNoEslintConfig` is false', () => {
+    let editor
+    let didError
+    let gotLintingErrors
+    let tempFixtureDir
+
+    beforeEach(() => {
+      atom.config.set('linter-eslint.disableWhenNoEslintConfig', false)
+
+      waitsForPromise(() =>
+        copyFileToTempDir(badInlinePath, tempFixtureDir)
+          .then(({ openEditor, tempDir }) => {
+            editor = openEditor
+            tempFixtureDir = tempDir
+          })
+      )
+    })
+
+    afterEach(() => {
+      rimraf.sync(tempFixtureDir)
+    })
+
+    it('errors when no config file is found', () => {
+      lint(editor)
+        .then((messages) => {
+          // Older versions of ESLint will report an error
+          // (or if current user running tests has a config in their home directory)
+          const expectedHtml = '<a href=http://eslint.org/docs/rules/no-undef ' +
+            'class="badge badge-flexible eslint">no-undef</a> &#39;foo&#39; is not defined.'
+          expect(messages.length).toBe(1)
+          expect(messages[0].html).toBe(expectedHtml)
+          gotLintingErrors = true
+        })
+        .catch((err) => {
+          // Newer versions of ESLint will throw an exception
+          expect(err.message).toBe('No ESLint configuration found.')
+          didError = true
+        })
+
+      waitsFor(
+        () => didError || gotLintingErrors,
+        'An error should have been thrown or linting performed'
+      )
+    })
+  })
+
+  describe('when `disableWhenNoEslintConfig` is true', () => {
+    let editor
+    let tempFixtureDir
+
+    beforeEach(() => {
+      atom.config.set('linter-eslint.disableWhenNoEslintConfig', true)
+
+      waitsForPromise(() =>
+        copyFileToTempDir(badInlinePath)
+          .then(({ openEditor, tempDir }) => {
+            editor = openEditor
+            tempFixtureDir = tempDir
+          })
+      )
+    })
+
+    afterEach(() => {
+      rimraf.sync(tempFixtureDir)
+    })
+
+    it('does not report errors when no config file is found', () =>
+      waitsForPromise(() =>
+        lint(editor)
+          .then((messages) => {
+            expect(messages.length).toBe(0)
+          })
+      )
+    )
+  })
 })

src/is-config-at-home-root.js

@@ -0,0 +1,16 @@
+/* eslint-disable import/prefer-default-export */
+
+import userHome from 'user-home'
+import { dirname } from 'path'
+
+/**
+ * Check if a config is directly inside a user's home directory.
+ * Such config files are used by ESLint as a fallback, only for situations
+ * when there is no other config file between a file being linted and root.
+ *
+ * @param  {string}  configPath - The path of the config file being checked
+ * @return {Boolean}              True if the file is directly in the current user's home
+ */
+export function isConfigAtHomeRoot(configPath) {
+  return (dirname(configPath) === userHome)
+}

src/main.js

@@ -6,9 +6,10 @@ import { CompositeDisposable, } from 'atom'
 
 import {
   spawnWorker, showError, idsToIgnoredRules, processESLintMessages,
-  generateDebugString
+  generateDebugString,
 } from './helpers'
 import { getConfigPath } from './worker-helpers'
+import { isConfigAtHomeRoot } from './is-config-at-home-root'
 
 // Configuration
 const scopes = []
@@ -54,7 +55,8 @@ module.exports = {
           // Do not try to fix if linting should be disabled
           const fileDir = Path.dirname(filePath)
           const configPath = getConfigPath(fileDir)
-          if (configPath === null && disableWhenNoEslintConfig) return
+          const noProjectConfig = (configPath === null || isConfigAtHomeRoot(configPath))
+          if (noProjectConfig && disableWhenNoEslintConfig) return
 
           this.worker.request('job', {
             type: 'fix',

src/worker.js

@@ -6,6 +6,7 @@ import Path from 'path'
 import { create } from 'process-communication'
 import { FindCache, findCached } from 'atom-linter'
 import * as Helpers from './worker-helpers'
+import { isConfigAtHomeRoot } from './is-config-at-home-root'
 
 process.title = 'linter-eslint helper'
 
@@ -24,7 +25,8 @@ const ignoredMessages = [
 ]
 
 function lintJob(argv, contents, eslint, configPath, config) {
-  if (configPath === null && config.disableWhenNoEslintConfig) {
+  const noProjectConfig = (configPath === null || isConfigAtHomeRoot(configPath))
+  if (noProjectConfig && config.disableWhenNoEslintConfig) {
     return []
   }
   eslint.execute(argv, contents)