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
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;
module { grunt; grunt;};
Configuration examples
Use defaults
Here we want to optimise two directories using default options.
imageoptim: myTask: src: 'www/images' 'css/images'
Override defaults
Here we want to optimise two directories using only ImageAlpha and ImageOptim, then close them once we're done.
imageoptim: myTask: options: jpegMini: false imageAlpha: true quitAfter: true src: 'www/images' 'css/images'
Custom options for each task
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.
imageoptim: myPngs: options: jpegMini: false imageAlpha: true quitAfter: true src: 'img/png' myJpgs: options: jpegMini: true imageAlpha: false quitAfter: true src: 'img/jpg'
Option inheritance
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.
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.