Parse the reddit API docs and return them as JSON

reddit api docs (json)

require 'nokogiri'
require 'json'

html = `curl 'https://www.reddit.com/dev/api/' \
-H 'authority: www.reddit.com' \
-H 'cache-control: max-age=0' \
-H 'upgrade-insecure-requests: 1' \
-H 'user-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36' \
-H 'accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8' \
-H 'referer: https://www.google.co.jp/' \
-H 'accept-encoding: gzip, deflate, br' \
-H 'accept-language: en-US,en;q=0.9,ja;q=0.8' --compressed`

doc = Nokogiri::HTML(html)

data = doc.css('.endpoint').map { |e|
  { method: e.css('h3 .method').text,
    oauth_scope: e.css('.api-badge.oauth-scope').text,
    description: e.css('.info .md').text,
    endpoint: -> {
      e.css('h3 .placeholder').each do |p| p.replace("__#{p.text}__") end
      e.css('h3').children.select(&:text?).map(&:text).join
    }.(),
    params: e.css('.parameters th').zip(e.css('.parameters td')).map { |param, desc|
      { param.text.to_sym => desc.text }
    },
    variants: -> {
      e.css('.uri-variants .placeholder').each do |p| p.replace("__#{p.text}__") end
      e.css('.uri-variants li').map(&:text)
    }.()
  }
}

File.open("reddit_api.json", 'w') { |f| f << data.to_json }