Escompress

Use esbuild to compress your Rails CSS (or JS if you want).

Why?

You might find yourself with a Rails app that uses sass-rails (and sassc) gems. You may be stuck with these gems for legacy reasons. But the sassc gem can't handle newer CSS syntaxes. You may see this error:

SassC::SyntaxError: Error: Function rgb is missing argument $green

More info: https://github.com/tailwindlabs/tailwindcss/discussions/6738

Installation

Install the gem and add to the application's Gemfile by executing:

$ bundle add escompress

Usage

Make sure you have esbuild in your package.json file. If you are using Rails, escompress will look in your node_modules folder for the esbuild executable. If not using Rails, the gem will assume the executable is located at /usr/local/bin/esbuild on the underlying machine.

# in application.rb

# You can specify the location of your esbuild executable.
# Escompress.esbuild_executable = Rails.root.join("some/other/path/esbuild")

module MyApp
  class Application < Rails::Application
    # ... other code
    config.assets.css_compressor = :escompress
    # config.assets.js_compressor = :escompress
  end
end

Development

After checking out the repo, run bin/setup to install dependencies. 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 the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/jwilsjustin/escompress. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to be decent human beings.

License

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