.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

index.js

@@ -6,48 +6,55 @@ 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 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) {
-				fancyLog('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 PluginError('gulp-autoprefixer', err, {
-				fileName: file.path,
-				showStack: !cssError
-			}));
-		});
+		})();
 	});
 };

license

@@ -1,6 +1,6 @@
 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:
 

package.json

@@ -1,47 +1,55 @@
 {
-  "name": "gulp-autoprefixer",
-  "version": "4.1.0",
-  "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",
-    "fancy-log": "^1.3.2",
-    "plugin-error": "^0.1.2",
-    "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",
-    "vinyl": "^2.1.0",
-    "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

@@ -3,21 +3,21 @@ import test from 'ava';
 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 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');
 });
 
@@ -27,8 +27,8 @@ test('generate source maps', async t => {
 	const data = pEvent(write, 'data');
 
 	init
-		.pipe(m({
-			browsers: ['Firefox ESR']
+		.pipe(autoprefixer({
+			overrideBrowserslist: ['Firefox ESR']
 		}))
 		.pipe(write);
 
@@ -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',