image_optim_rake

A simple wrapper around image_optim to batch minify all images in one or more directories.

Designed to work with Rails and per default recursively looks for JPGs and PNGs in app\assets\images and public.

Add this line to your application's Gemfile:

gem 'image_optim_rake'

And then execute:

$ bundle

Or install it yourself as:

$ gem install image_optim_rake

As above mentions this gem uses image_optim, which itself relies on some binary tools. These must be present at the system, but pngout is disabled here per default.

sudo apt-get install -y advancecomp gifsicle jpegoptim libjpeg-progs optipng pngcrush

sudo yum install -y advancecomp gifsicle libjpeg optipng

You will also need to install jpegoptim and pngcrush from source:

cd /tmp
curl -O http://www.kokkonen.net/tjko/src/jpegoptim-1.2.4.tar.gz
tar zxf jpegoptim-1.2.4.tar.gz
cd jpegoptim-1.2.4
./configure && make && make install

cd /tmp
curl -O http://iweb.dl.sourceforge.net/project/pmt/pngcrush/1.7.43/pngcrush-1.7.43.tar.gz
tar zxf pngcrush-1.7.43.tar.gz
cd pngcrush-1.7.43
make && cp -f pngcrush /usr/local/bin

sudo port install advancecomp gifsicle jpegoptim jpeg optipng pngcrush

brew install advancecomp gifsicle jpegoptim jpeg optipng pngcrush

You can install pngout by downloading and installing the binary versions.

Note: pngout is free to use even in commercial soft, but you can not redistribute, repackage or reuse it without consent and agreement of creator. license

Copied from: https://github.com/toy/image_optim/

Change to your project directory and run:

$ rake image_optim:minify

You can define the directories where images will be searched recursively by setting a dirs argument:

$ rake image_optim:minify dirs=app/assets/images,public,lib/assets/images,vendor/assets/images

You can modify the configuration which is passed to image_optim:

ImageOptimRake::ImageOptimTask.config = {
    :threads => true,
    :pngout  => false
}

You can also modify the default paths:

ImageOptimTask.dirs   = ["app/assets/images", "public"]

A good place would be an initializer in a Rails environment.

$ rake test

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request