Find JAR file differences between git commits. Usage: ruby jar_compare.rb current_commit prev_commit git_directory

jar_compare.rb

require 'fileutils'
require 'awesome_print'



def find_jars(revision, path) 
  
  FileUtils.cd path 
  puts %x{git checkout #{revision}}
  result = []

  jars = Dir['**/*.jar'].sort
  
  jars.each do |x| 
    md5sum = %x{md5 -q #{x}}.chomp
    x.match(/(.*)\/(.*\.jar)\Z/)
    result << "#{$1}:#{$2}:#{md5sum}" 
  end
  
  puts %x{git checkout main}
  result
end

def md5_matches(current, previous)
  matches = []
  non_matches = []
  current.each do |cur|
    cur_md5 = cur.split(':')[2] 
    matched = false
    previous.each do |prev|
      if prev.include? cur_md5
        matches << "#{cur} => #{prev}" 
        matched = true
      end
    end
    non_matches << cur unless matched
  end
  return matches, non_matches
end


#######################################
current_rev = ARGV.shift
prev_rev = ARGV.shift
root_dir = ARGV.shift

abort "Usage: jar_compare.rb current_commit prev_commit git_directory" if current_rev.nil? || prev_rev.nil?


current_jar_list = find_jars(current_rev, root_dir) 
#ap current_jar_list


prev_jar_list = find_jars(prev_rev, root_dir) 
#ap prev_jar_list

matches, non_matches = md5_matches(current_jar_list, prev_jar_list)

puts "#############################################################"
puts "# MATCHES                                                   #"
puts "#############################################################"
ap matches


puts "#############################################################"
puts "# NEW                                                       #"
puts "#############################################################"
ap non_matches