Haxelib vs Opal

Haxelib is the library manager included with Haxe distributions. It connects to a central repository for finding, installing, and sharing Haxe libraries on Windows, macOS, and Linux, with API access. The command line installs the latest release or a specified version, resolves dependencies from HXML files, and supports offline installation. Search matches project names or descriptions, while the info command displays ownership, licensing, descriptions, websites, tags, versions, and release notes. Developers can submit ZIP archives or directories, use Git or Mercurial repositories, and create local repositories from project files. Installed libraries can be exposed to the Haxe compiler with --library or -L. Haxelib can use an HTTP proxy or a custom server. Libraries are distributed as source by default. The public HaxeFoundation repository is MIT licensed, and community links include GitHub, bug reports, Stack Overflow, forums, Discord, and Gitter. All libraries are free.

Opal is a Ruby-to-JavaScript source-to-source compiler that converts Ruby ahead of time into plain JavaScript, without a runtime interpreter. It includes implementations of Ruby core and standard libraries. Ruby code can call JavaScript, JavaScript can call Ruby, and native JavaScript classes can be treated as Ruby classes. The project describes sharing a gem, objects, and specs between server and client code.

Opal can run in browsers and JavaScript environments including Node.js, Deno, Bun, and QuickJS. For its upcoming 2.0 release, the project lists current and previous stable Firefox, Chrome, Safari, and Edge as supported, while Internet Explorer is unsupported. That release targets ES2021 and has no transpilation fallback for older JavaScript engines. Listed integrations include Rails, Sinatra, Roda, and static apps; the Rails example uses opal-rails and requires opal_ujs and turbolinks. Installation is through `gem install opal` or by adding the gem to a Gemfile. The gemspec declares Ruby >= 2.3, and CI exercises Ruby 3.0 through 4.0 and JRuby. Opal is MIT-licensed and free, with CLI and API access. Support channels include Slack, Stack Overflow’s #opalrb tag, and GitHub issues.