onebox-cli
Generates a Onebox element from an URL and fetches some stylesheets. Most of the effort went into figuring out what stylesheets from discourse/discourse that I needed to make it look good. Also necessary parts from phw/discourse-musicbrainz-onebox, which is written as a Discourse plugin.
Run
bundle
before running. Additionally depends on git and wget. Then run
ruby onebox-cli.rb [url]
which will output an HTML element that you can paste in your HTML and a style.css that you can include. Optionally, you can install xclip and do
ruby onebox-cli.rb [url] | xclip -selection c
to get it straight to your clipboard.