Replace jpegtran with mozjpeg (#336)

Author: tjbulick

fixture.jpg

@@ -8,7 +8,7 @@ const imagemin = require('imagemin');
 const plur = require('plur');
 
 const PLUGIN_NAME = 'gulp-imagemin';
-const defaultPlugins = ['gifsicle', 'jpegtran', 'optipng', 'svgo'];
+const defaultPlugins = ['gifsicle', 'mozjpeg', 'optipng', 'svgo'];
 
 const loadPlugin = (plugin, ...args) => {
 	try {
@@ -119,6 +119,6 @@ module.exports = (plugins, options) => {
 };
 
 module.exports.gifsicle = exposePlugin('gifsicle');
-module.exports.jpegtran = exposePlugin('jpegtran');
+module.exports.mozjpeg = exposePlugin('mozjpeg');
 module.exports.optipng = exposePlugin('optipng');
 module.exports.svgo = exposePlugin('svgo');

index.js

@@ -52,7 +52,7 @@
 	},
 	"optionalDependencies": {
 		"imagemin-gifsicle": "^6.0.1",
-		"imagemin-jpegtran": "^6.0.0",
+		"imagemin-mozjpeg": "^8.0.0",
 		"imagemin-optipng": "^7.0.0",
 		"imagemin-svgo": "^7.0.0"
 	},

package.json

@@ -33,7 +33,7 @@ exports.default = () => (
 // …
 .pipe(imagemin([
 	imagemin.gifsicle({interlaced: true}),
-	imagemin.jpegtran({progressive: true}),
+	imagemin.mozjpeg({quality: 75, progressive: true}),
 	imagemin.optipng({optimizationLevel: 5}),
 	imagemin.svgo({
 		plugins: [
@@ -86,7 +86,7 @@ Note that you may come across an older, implicit syntax. In versions < 3, the sa
 Comes bundled with the following **lossless** optimizers:
 
 - [gifsicle](https://github.com/imagemin/imagemin-gifsicle) — *Compress GIF images*
-- [jpegtran](https://github.com/imagemin/imagemin-jpegtran) — *Compress JPEG images*
+- [mozjpeg](https://github.com/imagemin/imagemin-mozjpeg) — *Compress JPEG images*
 - [optipng](https://github.com/imagemin/imagemin-optipng) — *Compress PNG images*
 - [svgo](https://github.com/imagemin/imagemin-svgo) — *Compress SVG images*
 
@@ -99,9 +99,9 @@ Unsupported files are ignored.
 #### plugins
 
 Type: `Array`<br>
-Default: `[imagemin.gifsicle(), imagemin.jpegtran(), imagemin.optipng(), imagemin.svgo()]`
+Default: `[imagemin.gifsicle(), imagemin.mozjpeg(), imagemin.optipng(), imagemin.svgo()]`
 
-[Plugins](https://www.npmjs.com/browse/keyword/imageminplugin) to use. This will overwrite the default plugins. Note that the default plugins comes with good defaults and should be sufficient in most cases. See the individual plugins for supported options.
+[Plugins](https://www.npmjs.com/browse/keyword/imageminplugin) to use. This will completely overwrite all the default plugins. So, if you want to use custom plugins and you need some of defaults too, then you should pass default plugins as well. Note that the default plugins come with good defaults and should be sufficient in most cases. See the individual plugins for supported options.
 
 #### options
 

readme.md

@@ -28,6 +28,18 @@ test('minify images', async t => {
 	t.true(file[0].contents.length < buffer.length);
 });
 
+test('minify JPEG with custom settings', async t => {
+	const mozjpegOptions = {
+		quality: 30,
+		progressive: false,
+		smooth: 45
+	};
+	const {buffer, stream} = await createFixture([gulpImagemin.mozjpeg(mozjpegOptions)], 'fixture.jpg');
+	const file = await getStream.array(stream);
+
+	t.true(file[0].contents.length < buffer.length);
+});
+
 test('use custom plugins', async t => {
 	const {stream} = await createFixture([imageminPngquant()]);
 	const compareStream = (await createFixture()).stream;