homebrew-core/cmd/brew-aspell-dictionaries.rb

#:  * `aspell-dictionaries`:
#:    Generates the new dictionaries for the `aspell` formula.

require "open-uri"
require "resource"
require "formula"

dict_url    = "https://ftp.gnu.org/gnu/aspell/dict"
dict_mirror = "https://ftpmirror.gnu.org/aspell/dict"

languages   = {}

URI.parse("#{dict_url}/0index.html").open do |content|
  content.each_line do |line|
    break if %r{^</table} =~ line
    next unless /^<tr><td><a/ =~ line

    fields = line.split('"')
    lang = fields[1]
    path = fields[3]
    lang.tr!("-", "_")
    languages[lang] = path
  end
end

resources = languages.map do |lang, path|
  r = Resource.new(lang)
  r.owner = Formulary.factory("aspell")
  r.url "#{dict_url}/#{path}"
  r.mirror "#{dict_mirror}/#{path}"
  r
end

resources.each {|r| r.fetch(verify_download_integrity: false)}

resources.each do |r|
  puts <<-EOS
    resource "#{r.name}" do
      url "#{r.url}"
      mirror "#{r.mirrors.first}"
      sha256 "#{r.cached_download.sha256}"
    end

  EOS
end