ftp-versions.rb

#  Copyright © 2014-2023 David Caldwell
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program.  If not, see <http://www.gnu.org/licenses/>.

module FtpVersions
  ReleaseUrl = "ftp://ftp.gnu.org/gnu/emacs/"
  PretestUrl = "ftp://alpha.gnu.org/gnu/emacs/pretest/"
  def self.versions(url)
    url=url.sub(%r{([^/])$}, "\\1/")

    version = []
    IO.popen(["curl", "-s", url]) do |io|
      while io.gets
        $_.chomp!
        if $_ =~ /(\d+) (\w+ \d+ (?: \d+|\d+:\d+)) (emacs-([\d.]+(?:-rc\d*|[a-z])?).tar.[xg]z)/
          version.push( { :version=>Gem::Version.new($4), :file=>$3, :date=>$2, :size=>$1, :url => url+$3 } )
        end
      end
    end

    version.sort{|a,b| a[:version] <=> b[:version]}
  end
end