rails-webp's Introduction

Rails::Webp

Create webp copies of your image assets the easy way using minimagick!

Installation

Before installing, make sure you have ImageMagick installed on your host.

Add this line to your application's Gemfile:

gem 'rails-webp'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rails-webp

Usage

This gem is intended to be used as a post processor step in your asset pipeline:

bundle exec rake assets:precompile

You can configure options passed to ImageMagick in an initializer:

config/initializers/webp.rb:

Rails::WebP.encode_options = { quality: 80, lossless: true, method: 6, alpha_filtering: 2, alpha_compression: 0, alpha_quality: 100 }

A comprehensive list of options can be found here.

Note: a digest is included in the processed webp image's file name. This digest is compared for each time compilation occurs. By default, rails-webp will only process images that have a mismatched digest (AKA hash of source image contents). If you wish to force webp processing:

Rails::WebP.force = true # default: false

Motivations for this gem

In my experience, the existing gems for processing webp images in the Rails Asset Pipeline made questionable assumptions. More importantly, I could not use the native libraries used by those gems in my team's acceptance/production environment. ImageMagick was an easy choice for this reason because it's widely implemented, used, and understood (my opinion).

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/jakenberg/rails-webp. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Rails::Webp project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

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rails-webp's Issues

data_digest bug

def webp_file_exists?(digest, output_path)
File.exists?(output_path) && digest == output_path.to_s.split('-').last.split('.').first
end

def data_digest(data)
"-#{context.environment.digest_class.new.update(data).to_s}"
end

digest == output_path.to_s.split('-').last.split('.').first

digest: '-123456abcdef'

output_path.to_s.split('-').last.split('.').first: '123456ABCabc'

The judgement is false forever!!!

That should be above.
def webp_file_exists?(digest, output_path)
File.exists?(output_path) && digest == "-#{output_path.to_s.split('-').last.split('.').first}"
end