logstash plugin version

lpv.rb

#!/usr/bin/env ruby

# use ./lpv.rb logstash_version plugin_name
# 
# example: 
# % ./lpv.rb 5.2.0 logstash-output-elasticsearch
# logstash-output-elasticsearch 6.2.4 https://github.com/logstash-plugins/logstash-output-elasticsearch/tree/v6.2.4

require 'net/http'

logstash_version = ARGV[0]
plugin_name = ARGV[1]

if ARGV.size != 2
  puts "Usage: lpv.rb logstash-version plugin-name"
  exit(1)
end

uri = if logstash_version.match(/^5\.[5678]/)
        URI("https://raw.githubusercontent.com/elastic/logstash/v#{logstash_version}/Gemfile.jruby-1.9.lock.release")
      elsif logstash_version.match(/^[25]/)
        URI("https://raw.githubusercontent.com/elastic/logstash/v#{logstash_version}/Gemfile.jruby-1.9.lock")
      elsif logstash_version.match(/^6\.[0-6]/)
        URI("https://raw.githubusercontent.com/elastic/logstash/v#{logstash_version}/Gemfile.jruby-2.3.lock.release")
      elsif logstash_version.match(/^[678]/)
        URI("https://raw.githubusercontent.com/elastic/logstash/v#{logstash_version}/Gemfile.jruby-2.5.lock.release")
      else
        puts "Version #{logstash_version} of logstash is not supported"
        exit(1)
      end

response = Net::HTTP.start(uri.host, uri.port, :use_ssl => true) do |http|
  request = Net::HTTP::Get.new(uri)
  http.request(request)
end

lock_file = response.body

if match = lock_file.match(/#{plugin_name}\s+\((?<plugin_version>\d+\.\d+\.\d+).*?\)/)
  plugin_version = match["plugin_version"]
  puts "#{plugin_name} #{plugin_version} https://github.com/logstash-plugins/#{plugin_name}/tree/v#{plugin_version}"
else
  puts "Couldn't find plugin version for #{plugin_name}"
  exit(1)
end