.editorconfig

@@ -7,6 +7,6 @@ charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
 
-[{package.json,*.yml}]
+[*.yml]
 indent_style = space
 indent_size = 2

.gitattributes

@@ -1 +1 @@
-* text=auto
+* text=auto eol=lf

.github/funding.yml

@@ -0,0 +1,4 @@
+github: sindresorhus
+open_collective: sindresorhus
+patreon: sindresorhus
+custom: https://sindresorhus.com/donate

.gitignore

@@ -1 +1,2 @@
 node_modules
+yarn.lock

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.travis.yml

@@ -1,5 +1,5 @@
-sudo: false
 language: node_js
 node_js:
-  - '6'
-  - '4'
+  - '12'
+  - '10'
+  - '8'

conf/rules/no-alert.js

@@ -1,7 +1,7 @@
 'use strict';
 module.exports = function (context) {
 	return {
-		CallExpression: function (node) {
+		CallExpression(node) {
 			if (node.callee.name === 'alert') {
 				context.report(node, 'testing custom rules.');
 			}

license

@@ -1,21 +1,9 @@
-The MIT License (MIT)
+MIT License
 
 Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
 
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
 
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

package.json

@@ -1,46 +1,40 @@
 {
-  "name": "grunt-eslint",
-  "version": "19.0.0",
-  "description": "Validate files with ESLint",
-  "license": "MIT",
-  "repository": "sindresorhus/grunt-eslint",
-  "author": {
-    "name": "Sindre Sorhus",
-    "email": "sindresorhus@gmail.com",
-    "url": "sindresorhus.com"
-  },
-  "engines": {
-    "node": ">=4"
-  },
-  "scripts": {
-    "test": "grunt"
-  },
-  "files": [
-    "tasks"
-  ],
-  "keywords": [
-    "gruntplugin",
-    "lint",
-    "validate",
-    "report",
-    "jshint",
-    "jslint",
-    "ecmascript",
-    "esprima"
-  ],
-  "dependencies": {
-    "chalk": "^1.0.0",
-    "eslint": "^3.0.0"
-  },
-  "devDependencies": {
-    "grunt": "^1.0.1",
-    "grunt-cli": "^1.2.0",
-    "grunt-shell": "^1.1.1"
-  },
-  "peerDependencies": {
-    "grunt": ">=0.4.0"
-  },
-  "xo": {
-    "esnext": true
-  }
+	"name": "grunt-eslint",
+	"version": "22.0.0",
+	"description": "Validate files with ESLint",
+	"license": "MIT",
+	"repository": "sindresorhus/grunt-eslint",
+	"author": {
+		"name": "Sindre Sorhus",
+		"email": "sindresorhus@gmail.com",
+		"url": "sindresorhus.com"
+	},
+	"engines": {
+		"node": ">=8"
+	},
+	"scripts": {
+		"test": "grunt"
+	},
+	"files": [
+		"tasks"
+	],
+	"keywords": [
+		"gruntplugin",
+		"eslint",
+		"lint",
+		"validate",
+		"report"
+	],
+	"dependencies": {
+		"chalk": "^2.1.0",
+		"eslint": "^6.0.1"
+	},
+	"devDependencies": {
+		"grunt": "^1.0.1",
+		"grunt-cli": "^1.2.0",
+		"grunt-shell": "^3.0.1"
+	},
+	"peerDependencies": {
+		"grunt": ">=1"
+	}
 }

readme.md

@@ -1,6 +1,6 @@
 # grunt-eslint [![Build Status](https://travis-ci.org/sindresorhus/grunt-eslint.svg?branch=master)](https://travis-ci.org/sindresorhus/grunt-eslint)
 
-> Validate files with [ESLint](http://eslint.org)
+> Validate files with [ESLint](https://eslint.org)
 
 ![](screenshot.png)
 
@@ -15,7 +15,7 @@ $ npm install --save-dev grunt-eslint
 ## Usage
 
 ```js
-require('load-grunt-tasks')(grunt); // npm install --save-dev load-grunt-tasks
+require('load-grunt-tasks')(grunt);
 
 grunt.initConfig({
 	eslint: {
@@ -59,7 +59,7 @@ grunt.initConfig({
 
 ## Options
 
-See the [ESLint options](http://eslint.org/docs/developer-guide/nodejs-api#cliengine).
+See the [ESLint options](https://eslint.org/docs/developer-guide/nodejs-api#cliengine).
 
 In addition the following options are supported:
 
@@ -89,11 +89,13 @@ Report errors only.
 ### maxWarnings
 
 Type: `number`<br>
-Default: `-1` *(means no limit)*
+Default: `-1` *(Means no limit)*
 
 Number of warnings to trigger non-zero exit code.
 
+### failOnError
 
-## License
+Type: `boolean`<br>
+Default: `true`
 
-MIT © [Sindre Sorhus](https://sindresorhus.com)
+Fail the build if ESLint found any errors.

tasks/eslint.js

@@ -4,58 +4,59 @@ const eslint = require('eslint');
 
 module.exports = grunt => {
 	grunt.registerMultiTask('eslint', 'Validate files with ESLint', function () {
-		const opts = this.options({
+		const options = this.options({
 			outputFile: false,
 			quiet: false,
-			maxWarnings: -1
+			maxWarnings: -1,
+			failOnError: true,
 		});
 
 		if (this.filesSrc.length === 0) {
 			grunt.log.writeln(chalk.magenta('Could not find any files to validate'));
 			return true;
 		}
 
-		const formatter = eslint.CLIEngine.getFormatter(opts.format);
+		const formatter = eslint.CLIEngine.getFormatter(options.format);
 
 		if (!formatter) {
-			grunt.warn(`Could not find formatter ${opts.format}`);
+			grunt.warn(`Could not find formatter ${options.format}`);
 			return false;
 		}
 
-		const engine = new eslint.CLIEngine(opts);
+		const engine = new eslint.CLIEngine(options);
 
 		let report;
 		try {
 			report = engine.executeOnFiles(this.filesSrc);
-		} catch (err) {
-			grunt.warn(err);
+		} catch (error) {
+			grunt.warn(error);
 			return false;
 		}
 
-		if (opts.fix) {
+		if (options.fix) {
 			eslint.CLIEngine.outputFixes(report);
 		}
 
 		let results = report.results;
 
-		if (opts.quiet) {
+		if (options.quiet) {
 			results = eslint.CLIEngine.getErrorResults(results);
 		}
 
 		const output = formatter(results);
 
-		if (opts.outputFile) {
-			grunt.file.write(opts.outputFile, output);
+		if (options.outputFile) {
+			grunt.file.write(options.outputFile, output);
 		} else if (output) {
 			console.log(output);
 		}
 
-		const tooManyWarnings = opts.maxWarnings >= 0 && report.warningCount > opts.maxWarnings;
+		const tooManyWarnings = options.maxWarnings >= 0 && report.warningCount > options.maxWarnings;
 
 		if (report.errorCount === 0 && tooManyWarnings) {
-			grunt.warn(`ESLint found too many warnings (maximum: ${opts.maxWarnings})`);
+			grunt.warn(`ESLint found too many warnings (maximum: ${options.maxWarnings})`);
 		}
 
-		return report.errorCount === 0;
+		return options.failOnError ? report.errorCount === 0 : 0;
 	});
 };