grunt-imageoptim


The companion Grunt plugin for ImageOptim-CLI, which automates batch optimisation of images with ImageOptim, ImageAlpha and JPEGmini for Mac.

Installation

From the root of your project, run

``shell
npm install grunt-imageoptim --save-dev
`

Dependencies

Since this project automates three Mac Applications, you will need them to be installed on your machine for us to be able to reach them.

+ ImageOptim
+ ImageAlpha
+ JPEGmini for Mac (App Store)

A local copy of ImageOptim-CLI will be installed, you won't need to install that separately.

Gruntfile.js

As with all Grunt plugins, grunt-imageoptim is configured using a Gruntfile.js in the root of your project.

Grunt provide a short walkthrough of a sample Gruntfile which explains how they work, but the general structure is this;

`javascript
module.exports = function(grunt) {
grunt.initConfig({
/ your grunt-imageoptim configuration goes here /
});
grunt.loadNpmTasks('grunt-imageoptim');
};
`

Configuration examples

$3

Here we want to optimise two directories using default options.

`javascript
imageoptim: {
myTask: {
src: ['www/images', 'css/images']
}
}
`

$3

Here we want to optimise two directories using only ImageAlpha and ImageOptim, then close them once we're done.

`javascript
imageoptim: {
myTask: {
options: {
jpegMini: false,
imageAlpha: true,
quitAfter: true
},
src: ['www/images', 'css/images']
}
}
`

$3

Here we have a task for a folder of PNGs and another for JPGs. Since we use ImageAlpha to optimise PNGs but not JPGs and vice versa with JPEGmini, here we toggle their availability between the two tasks.

`javascript
imageoptim: {
myPngs: {
options: {
jpegMini: false,
imageAlpha: true,
quitAfter: true
},
src: ['img/png']
},
myJpgs: {
options: {
jpegMini: true,
imageAlpha: false,
quitAfter: true
},
src: ['img/jpg']
}
}
`

$3

This example is equivalent to the _custom options for each task_ example, except we're setting some base options then overriding those we want to change within each task.

`javascript
imageoptim: {
options: {
quitAfter: true
},
allPngs: {
options: {
imageAlpha: true,
jpegMini: false
},
src: ['img/png']
},
allJpgs: {
options: {
imageAlpha: false,
jpegMini: true
},
src: ['img/jpg']
}
}
`

Options

All options can be either true or false and default to false.

+ quitAfter Whether to exit each application after we're finished optimising your images.
+ jpegMini Whether to process your images using a copy of JPEGmini.app installed on your Mac.
+ imageAlpha` Whether to process your images using a copy of ImageAlpha.app installed on your Mac.