init

index.d.ts

@@ -55,7 +55,7 @@ export interface Options {
 /**
 Buffer or stream to optimize.
 */
-export type Plugin = (input: Buffer | NodeJS.ReadableStream) => Promise<Buffer>
+export type Plugin = (input: Buffer | NodeJS.ReadableStream) => Promise<Buffer>;
 
 /**
 Imagemin plugin for pngquant.

index.js

 'use strict';
 const execa = require('execa');
 const isPng = require('is-png');
-const path = require('path');
 const isStream = require('is-stream');
-//const pngquant = require('pngquant-bin');
+const pngquant = require('pngquant-bin');
 const ow = require('ow');
-const pngquant = path.join(__dirname, 'vendor/pngquant');
 
 const imageminPngquant = (options = {}) => input => {
 	const isBuffer = Buffer.isBuffer(input);
@@ -65,10 +63,16 @@ const imageminPngquant = (options = {}) => input => {
 	const promise = subprocess
 		.then(result => result.stdout) // eslint-disable-line promise/prefer-await-to-then
 		.catch(error => {
-			if (error.code === 99) {
+			// We use `error.exitCode` to check for a special condition when running the pngquant binary.
+			// See details on handling of "99" code at https://pngquant.org (search for "status code 99").
+			if (error.exitCode === 99) {
 				return input;
 			}
 
+			if(error.code === 'EPIPE'){
+				return error.stdout;
+			}
+
 			error.message = error.stderr || error.message;
 			throw error;
 		});

index.test-d.ts

@@ -3,10 +3,12 @@ import * as path from 'path';
 import {expectType} from 'tsd';
 import imageminPngquant from '.';
 
-const buffer = await fs.readFileSync(path.join(__dirname, 'fixture.png'));
+const buffer = fs.readFileSync(path.join(__dirname, 'fixture.png'));
 
-expectType<Buffer>(await imageminPngquant()(buffer));
-expectType<Buffer>(await imageminPngquant({
+(async () => {
+	expectType<Buffer>(await imageminPngquant()(buffer));
+	expectType<Buffer>(await imageminPngquant({
 		speed: 10,
 		quality: [0.8, 1]
-})(buffer));
+	})(buffer));
+})();

package.json

 {
 	"name": "imagemin-pngquant",
-	"version": "8.0.0",
+	"version": "9.0.1",
 	"description": "Imagemin plugin for `pngquant`",
 	"license": "MIT",
 	"repository": "imagemin/imagemin-pngquant",
 	"engines": {
-		"node": ">=8"
+		"node": ">=10"
 	},
 	"scripts": {
 		"test": "xo && ava && tsd"
@@ -24,16 +24,17 @@
 		"pngquant"
 	],
 	"dependencies": {
-		"execa": "^1.0.0",
+		"execa": "^4.0.0",
 		"is-png": "^2.0.0",
 		"is-stream": "^2.0.0",
-		"ow": "^0.13.2"
+		"ow": "^0.17.0",
+		"pngquant-bin": "^6.0.0"
 	},
 	"devDependencies": {
 		"@types/node": "^12.0.3",
-		"ava": "^1.0.1",
+		"ava": "^3.8.0",
 		"get-stream": "^5.1.0",
-		"tsd": "^0.7.3",
-		"xo": "^0.24.0"
+		"tsd": "^0.11.0",
+		"xo": "^0.30.0"
 	}
 }

readme.md

@@ -17,7 +17,8 @@ const imagemin = require('imagemin');
 const imageminPngquant = require('imagemin-pngquant');
 
 (async () => {
-	await imagemin(['images/*.png'], 'build/images', {
+	await imagemin(['images/*.png'], {
+		destination: 'build/images',
 		plugins: [
 			imageminPngquant()
 		]

test.js

-import fs from 'fs';
-import path from 'path';
-import test from 'ava';
-import getStream from 'get-stream';
-import isPng from 'is-png';
-import imageminPngquant from '.';
+const {promisify} = require('util');
+const fs = require('fs');
+const path = require('path');
+const test = require('ava');
+const getStream = require('get-stream');
+const isPng = require('is-png');
+const imageminPngquant = require('.');
+
+const readFile = promisify(fs.readFile);
 
 test('optimize a PNG', async t => {
-	const buffer = await fs.readFileSync(path.join(__dirname, 'fixture.png'));
+	const buffer = await readFile(path.join(__dirname, 'fixture.png'));
 	const data = await imageminPngquant()(buffer);
 	t.true(data.length < buffer.length);
 	t.true(isPng(data));
 });
 
 test('support pngquant options', async t => {
-	const buffer = await fs.readFileSync(path.join(__dirname, 'fixture.png'));
+	const buffer = await readFile(path.join(__dirname, 'fixture.png'));
 	const data = await imageminPngquant({
 		speed: 10,
 		quality: [0.8, 1]
@@ -23,7 +26,7 @@ test('support pngquant options', async t => {
 });
 
 test('support streams', async t => {
-	const buffer = await fs.readFileSync(path.join(__dirname, 'fixture.png'));
+	const buffer = await readFile(path.join(__dirname, 'fixture.png'));
 	const stream = fs.createReadStream(path.join(__dirname, 'fixture.png'));
 	const data = await getStream.buffer(imageminPngquant()(stream));
 	t.true(data.length < buffer.length);
@@ -31,14 +34,7 @@ test('support streams', async t => {
 });
 
 test('skip optimizing a non-PNG file', async t => {
-	const buffer = await fs.readFileSync(__filename);
+	const buffer = await readFile(__filename);
 	const data = await imageminPngquant()(buffer);
 	t.is(data.length, buffer.length);
 });
-
-test('skip optimizing a fully optimized PNG', async t => {
-	const buffer = await fs.readFileSync(path.join(__dirname, 'fixture-no-compress.png'));
-	const data = await imageminPngquant({quality: [0.8, 1]})(buffer);
-	t.is(data.length, buffer.length);
-	t.true(isPng(data));
-});

yarn-error.log

-Arguments: 
-  /usr/local/bin/node /Users/rockyl/.yarn/bin/yarn.js add http://gitlab2.dui88.com/laoqifeng/pngquant-bin.git
-
-PATH: 
-  /Users/rockyl/.cargo/bin:/Users/rockyl/.yarn/bin:/Users/rockyl/.config/yarn/global/node_modules/.bin:/Users/rockyl/bin:/usr/local/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public:/usr/local/go/bin:/usr/local/share/dotnet:~/.dotnet/tools:/Library/Frameworks/Mono.framework/Versions/Current/Commands:/Applications/Wireshark.app/Contents/MacOS:/Users/rockyl/WorkSpaces/pngquant-bin/node_modules/.bin:/Users/rockyl/WorkSpaces/iot/xtensa-lx106-elf/bin:/Applications/microchip/xc8/v2.05/bin
-
-Yarn version: 
-  1.17.3
-
-Node version: 
-  11.13.0
-
-Platform: 
-  darwin x64
-
-Trace: 
-  SyntaxError: /Users/rockyl/WorkSpaces/imagemin-pngquant/package.json: Unexpected token } in JSON at position 512
-      at JSON.parse (<anonymous>)
-      at /Users/rockyl/.yarn/lib/cli.js:1625:59
-      at Generator.next (<anonymous>)
-      at step (/Users/rockyl/.yarn/lib/cli.js:304:30)
-      at /Users/rockyl/.yarn/lib/cli.js:315:13
-
-npm manifest: 
-  {
-  	"name": "imagemin-pngquant",
-  	"version": "8.0.0",
-  	"description": "Imagemin plugin for `pngquant`",
-  	"license": "MIT",
-  	"repository": "imagemin/imagemin-pngquant",
-  	"engines": {
-  		"node": ">=8"
-  	},
-  	"scripts": {
-  		"test": "xo && ava && tsd"
-  	},
-  	"files": [
-  		"index.js",
-  		"index.d.ts"
-  	],
-  	"keywords": [
-  		"compress",
-  		"image",
-  		"imageminplugin",
-  		"minify",
-  		"optimize",
-  		"png",
-  		"pngquant"
-  	],
-  	"dependencies": {
-  		"execa": "^1.0.0",
-  		"is-png": "^2.0.0",
-  		"is-stream": "^2.0.0",
-  		"ow": "^0.13.2",
-  	},
-  	"devDependencies": {
-  		"@types/node": "^12.0.3",
-  		"ava": "^1.0.1",
-  		"get-stream": "^5.1.0",
-  		"tsd": "^0.7.3",
-  		"xo": "^0.24.0"
-  	}
-  }
-
-yarn manifest: 
-  No manifest
-
-Lockfile: 
-  No lockfile