Installs the Dash docs for all the Ruby Gems in your Gemfile

install_dash_gem_docs.rb

#!/usr/bin/env ruby
#
# Prerequisites:
#   gem install gemnasium-parser

require 'gemnasium/parser'

def remove_docless_gems(gemfile)
  # rails-assets gems don't have docs and cause Dash to crash
  gemfile.dependencies.reject { |dependency| dependency.name.start_with?("rails-assets") }
end

content = File.open("./Gemfile", "rb").read
gemfile = Gemnasium::Parser.gemfile(content)

dependencies = remove_docless_gems(gemfile)

dependencies.each do |dependency|
  entry_name = dependency.name
  version = dependency.requirement.requirements[0][1].version

  puts "Installing docs for #{entry_name} #{version} "
  system "open 'dash-install://repo_name=Ruby Docsets&entry_name=#{entry_name}&version=#{version}'"
end

Found this today, works like a charm. Thanks!

https://gist.github.com/jasonnoble/db2317bf81421708a6766d4d9618c9c8 uses Bundler instead of gemnasium-parser.