.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

@@ -1,2 +1 @@
-* text=auto
-*.js text eol=lf
+* text=auto eol=lf

.github/workflows/main.yml

@@ -0,0 +1,22 @@
+name: CI
+on:
+  - push
+  - pull_request
+jobs:
+  test:
+    name: Node.js ${{ matrix.node-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version:
+          - 16
+          - 14
+          - 12
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npm test

.gitignore

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

.npmrc

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

index.js

@@ -1,52 +1,60 @@
 'use strict';
-const gutil = require('gulp-util');
+const fancyLog = require('fancy-log');
+const PluginError = require('plugin-error');
 const through = require('through2');
 const applySourceMap = require('vinyl-sourcemaps-apply');
 const autoprefixer = require('autoprefixer');
 const postcss = require('postcss');
 
-module.exports = opts => {
-	return through.obj((file, enc, cb) => {
+module.exports = options => {
+	return through.obj((file, encoding, callback) => {
 		if (file.isNull()) {
-			cb(null, file);
+			callback(null, file);
 			return;
 		}
 
 		if (file.isStream()) {
-			cb(new gutil.PluginError('gulp-autoprefixer', 'Streaming not supported'));
+			callback(new PluginError('gulp-autoprefixer', 'Streaming not supported'));
 			return;
 		}
 
-		postcss(autoprefixer(opts)).process(file.contents.toString(), {
-			map: file.sourceMap ? {annotation: false} : false,
-			from: file.path,
-			to: file.path
-		}).then(res => {
-			file.contents = Buffer.from(res.css);
-
-			if (res.map && file.sourceMap) {
-				applySourceMap(file, res.map.toString());
-			}
-
-			const warnings = res.warnings();
-
-			if (warnings.length > 0) {
-				gutil.log('gulp-autoprefixer:', '\n  ' + warnings.join('\n  '));
+		(async () => {
+			try {
+				const result = await postcss(autoprefixer(options)).process(file.contents.toString(), {
+					map: file.sourceMap ? {annotation: false} : false,
+					from: file.path,
+					to: file.path
+				});
+
+				file.contents = Buffer.from(result.css);
+
+				if (result.map && file.sourceMap) {
+					const map = result.map.toJSON();
+					map.file = file.relative;
+					map.sources = map.sources.map(() => file.relative);
+					applySourceMap(file, map);
+				}
+
+				const warnings = result.warnings();
+
+				if (warnings.length > 0) {
+					fancyLog('gulp-autoprefixer:', '\n  ' + warnings.join('\n  '));
+				}
+
+				setImmediate(callback, null, file);
+			} catch (error) {
+				const cssError = error.name === 'CssSyntaxError';
+
+				if (cssError) {
+					error.message += error.showSourceCode();
+				}
+
+				// Prevent stream unhandled exception from being suppressed by Promise
+				setImmediate(callback, new PluginError('gulp-autoprefixer', error, {
+					fileName: file.path,
+					showStack: !cssError
+				}));
 			}
-
-			setImmediate(cb, null, file);
-		}).catch(err => {
-			const cssError = err.name === 'CssSyntaxError';
-
-			if (cssError) {
-				err.message += err.showSourceCode();
-			}
-
-			// Prevent stream unhandled exception from being suppressed by Promise
-			setImmediate(cb, new gutil.PluginError('gulp-autoprefixer', err, {
-				fileName: file.path,
-				showStack: !cssError
-			}));
-		});
+		})();
 	});
 };

license

@@ -1,21 +1,9 @@
-The MIT License (MIT)
+MIT License
 
-Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (https://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

@@ -1,45 +1,55 @@
 {
-  "name": "gulp-autoprefixer",
-  "version": "4.0.0",
-  "description": "Prefix CSS",
-  "license": "MIT",
-  "repository": "sindresorhus/gulp-autoprefixer",
-  "author": {
-    "name": "Sindre Sorhus",
-    "email": "sindresorhus@gmail.com",
-    "url": "sindresorhus.com"
-  },
-  "engines": {
-    "node": ">=4.5"
-  },
-  "scripts": {
-    "test": "xo && ava"
-  },
-  "files": [
-    "index.js"
-  ],
-  "keywords": [
-    "gulpplugin",
-    "autoprefixer",
-    "postcss",
-    "css",
-    "prefix",
-    "prefixes",
-    "stylesheet",
-    "preprocess",
-    "postcss-runner"
-  ],
-  "dependencies": {
-    "autoprefixer": "^7.0.0",
-    "gulp-util": "^3.0.0",
-    "postcss": "^6.0.1",
-    "through2": "^2.0.0",
-    "vinyl-sourcemaps-apply": "^0.2.0"
-  },
-  "devDependencies": {
-    "ava": "*",
-    "gulp-sourcemaps": "^2.6.0",
-    "p-event": "^1.1.0",
-    "xo": "*"
-  }
+	"name": "gulp-autoprefixer",
+	"version": "8.0.0",
+	"description": "Prefix CSS",
+	"license": "MIT",
+	"repository": "sindresorhus/gulp-autoprefixer",
+	"author": {
+		"name": "Sindre Sorhus",
+		"email": "sindresorhus@gmail.com",
+		"url": "https://sindresorhus.com"
+	},
+	"engines": {
+		"node": ">=12"
+	},
+	"scripts": {
+		"test": "xo && ava"
+	},
+	"files": [
+		"index.js"
+	],
+	"keywords": [
+		"gulpplugin",
+		"autoprefixer",
+		"postcss",
+		"css",
+		"prefix",
+		"prefixes",
+		"stylesheet",
+		"preprocess",
+		"postcss-runner"
+	],
+	"dependencies": {
+		"autoprefixer": "^10.2.6",
+		"fancy-log": "^1.3.3",
+		"plugin-error": "^1.0.1",
+		"postcss": "^8.3.0",
+		"through2": "^4.0.2",
+		"vinyl-sourcemaps-apply": "^0.2.1"
+	},
+	"devDependencies": {
+		"ava": "^2.4.0",
+		"gulp-sourcemaps": "^3.0.0",
+		"p-event": "^4.2.0",
+		"vinyl": "^2.2.1",
+		"xo": "^0.39.0"
+	},
+	"peerDependencies": {
+		"gulp": ">=4"
+	},
+	"peerDependenciesMeta": {
+		"gulp": {
+			"optional": true
+		}
+	}
 }

readme.md

@@ -1,53 +1,40 @@
-# gulp-autoprefixer [![Build Status](https://travis-ci.org/sindresorhus/gulp-autoprefixer.svg?branch=master)](https://travis-ci.org/sindresorhus/gulp-autoprefixer)
+# gulp-autoprefixer
 
 > Prefix CSS with [Autoprefixer](https://github.com/postcss/autoprefixer)
 
 *Issues with the output should be reported on the Autoprefixer [issue tracker](https://github.com/postcss/autoprefixer/issues).*
 
-
----
-
-<p align="center">👾</p>
-<p align="center"><b>Improve your JavaScript skills with this awesome <a href="https://ES6.io/friend/AWESOME">ES6 course</a> by Wes Bos.</b><br>Try his free <a href="https://javascript30.com/friend/AWESOME">JavaScript 30 course</a> for a taste of what to expect. You might also like his <a href="https://ReactForBeginners.com/friend/AWESOME">React</a> & <a href="https://SublimeTextBook.com/friend/AWESOME">Sublime</a> course.</p>
-
----
-
-
 ## Install
 
 ```
 $ npm install --save-dev gulp-autoprefixer
 ```
 
-
 ## Usage
 
 ```js
 const gulp = require('gulp');
 const autoprefixer = require('gulp-autoprefixer');
 
-gulp.task('default', () =>
+exports.default = () => (
 	gulp.src('src/app.css')
 		.pipe(autoprefixer({
-			browsers: ['last 2 versions'],
 			cascade: false
 		}))
 		.pipe(gulp.dest('dist'))
 );
 ```
 
-
 ## API
 
-### autoprefixer([options])
+### autoprefixer(options?)
 
 #### options
 
-Type: `Object`
+Type: `object`
 
 See the Autoprefixer [options](https://github.com/postcss/autoprefixer#options).
 
-
 ## Source Maps
 
 Use [gulp-sourcemaps](https://github.com/gulp-sourcemaps/gulp-sourcemaps) like this:
@@ -58,7 +45,7 @@ const sourcemaps = require('gulp-sourcemaps');
 const autoprefixer = require('gulp-autoprefixer');
 const concat = require('gulp-concat');
 
-gulp.task('default', () =>
+exports.default = () => (
 	gulp.src('src/**/*.css')
 		.pipe(sourcemaps.init())
 		.pipe(autoprefixer())
@@ -68,12 +55,6 @@ gulp.task('default', () =>
 );
 ```
 
-
 ## Tip
 
 If you use other PostCSS based tools, like `cssnano`, you may want to run them together using [`gulp-postcss`](https://github.com/postcss/autoprefixer#gulp) instead of `gulp-autoprefixer`. It will be faster, as the CSS is parsed only once for all PostCSS based tools, including Autoprefixer.
-
-
-## License
-
-MIT © [Sindre Sorhus](https://sindresorhus.com)

test.js

@@ -1,23 +1,23 @@
 import path from 'path';
 import test from 'ava';
-import gutil from 'gulp-util';
+import Vinyl from 'vinyl';
 import sourceMaps from 'gulp-sourcemaps';
 import pEvent from 'p-event';
-import m from '.';
+import autoprefixer from '.';
 
 test('autoprefix CSS', async t => {
-	const stream = m();
+	const stream = autoprefixer();
 	const data = pEvent(stream, 'data');
 
-	stream.end(new gutil.File({
+	stream.end(new Vinyl({
 		cwd: __dirname,
 		base: path.join(__dirname, 'fixture'),
 		path: path.join(__dirname, 'fixture', 'fixture.css'),
-		contents: Buffer.from('a {\n\tdisplay: flex;\n}')
+		contents: Buffer.from('::placeholder {\n\tcolor: gray;\n}')
 	}));
 
 	const file = await data;
-	t.true(/-/.test(file.contents.toString()));
+	t.regex(file.contents.toString(), /-/);
 	t.is(file.relative, 'fixture.css');
 });
 
@@ -27,12 +27,12 @@ test('generate source maps', async t => {
 	const data = pEvent(write, 'data');
 
 	init
-		.pipe(m({
-			browsers: ['Firefox ESR']
+		.pipe(autoprefixer({
+			overrideBrowserslist: ['Firefox ESR']
 		}))
 		.pipe(write);
 
-	init.end(new gutil.File({
+	init.end(new Vinyl({
 		cwd: __dirname,
 		base: path.join(__dirname, 'fixture'),
 		path: path.join(__dirname, 'fixture', 'fixture.css'),
@@ -41,15 +41,15 @@ test('generate source maps', async t => {
 	}));
 
 	const file = await data;
-	t.is(file.sourceMap.mappings, 'AAAA;CACC,cAAc;CACd');
+	t.is(file.sourceMap.mappings, 'AAAA;CACC,aAAa;AACd');
 	const contents = file.contents.toString();
-	t.true(/flex/.test(contents));
-	t.true(/sourceMappingURL=data:application\/json;charset=utf8;base64/.test(contents));
+	t.regex(contents, /flex/);
+	t.regex(contents, /sourceMappingURL=data:application\/json;charset=utf8;base64/);
 });
 
 test('read upstream source maps', async t => {
 	let testFile;
-	const stream = m();
+	const stream = autoprefixer();
 	const write = sourceMaps.write();
 	const sourcesContent = [
 		'a {\n  display: flex;\n}\n',
@@ -61,7 +61,7 @@ test('read upstream source maps', async t => {
 	stream.pipe(write);
 
 	stream.end(
-		testFile = new gutil.File({
+		testFile = new Vinyl({
 			cwd: __dirname,
 			base: path.join(__dirname, 'fixture'),
 			path: path.join(__dirname, 'fixture', 'fixture.css'),