Update cleaner for Eclipse Ganymede

gistfile1.rb

#!/usr/bin/ruby

# Author: Renato Silva

if not ARGV[1] =~ /\A[^--]*\z/
    goal = "Update cleaner for Eclipse Ganymede, version 2009.2.18"
    usage = "Usage: #{File.basename($0)} <eclipse home> <target dir> [--all]\n\n\t--all\t Show ignored plugins"
    puts "\n\t#{goal}\n\n\t#{usage}\n\n"
    exit
end

home, target = ARGV[0..1].map { |arg| arg.gsub(/\\/, '/') }
show_ignored = (ARGV[2] == "--all")
require 'fileutils'
exit if File.file?(target)
FileUtils.makedirs(target)

PLUGIN_DATE = /v(\d{8})/
ignored_plugins = [ "javax.wsdl" ]
unique_plugins = Hash.new

Dir["#{home}/plugins/*"].each do |plugin|

    plugin_name = plugin[/([^\/]*)_/, 1]
    if unique_plugins.keys.include?(plugin_name)

        if show_ignored or not ignored_plugins.include?(plugin_name)

            date_unique = unique_plugins[plugin_name][PLUGIN_DATE, 1].to_i
            date_current = plugin[PLUGIN_DATE, 1].to_i
            new, old = date_current, date_unique

            if date_unique > date_current  
                new, old = date_unique, date_current 
                to_move = plugin
                relation = '>'
            elsif date_current > date_unique
                to_move = unique_plugins[plugin_name] 
                unique_plugins.store(plugin_name, plugin)
                relation = '>'
            else
                relation = '='
            end

            if ignored_plugins.include?(plugin_name)
                status = "ignored"
            else
                status = "kept"
                if relation != '='
                    FileUtils.move(to_move, target, :force => true)
                    if not File.exist?(to_move)
                        status = "SUCCESS"
                    elsif File.directory?(to_move)
                        status = "is dir"
                    end 
                end
            end      
            puts "#{new} #{relation} #{old}: \t#{status}\t#{plugin_name} " 
        end 
    else
        unique_plugins.store(plugin_name, plugin)
    end
end

profile_ids = []
profiles = "#{home}/p2/org.eclipse.equinox.p2.engine/profileRegistry/PlatformProfile.profile"
Dir["#{profiles}/*"].each { |profile| profile_ids << profile[/(\d+).profile$/, 1].to_i }

useless = profile_ids.sort.reverse[1..-1]  
puts if useless.any?
useless.each do |id|
    profile = "#{profiles}/#{id}.profile"
    FileUtils.move(profile, target, :force => true)
    status = File.exist?(profile)? "kept" : "moved"
    puts "#{id}.profile #{status}" 
end

rollback = "#{home}/p2/org.eclipse.equinox.p2.director/rollback/content.xml"
units = IO.read(rollback)

if units[/<units\s+size=["']?(\d+)["']?/, 1].to_i > 0
    units.gsub!(/<units.*units>/mi, "<units size='0'></units>")
    FileUtils.move(rollback, target, :force => true)  
end

status = File.exist?(rollback)? "kept" : "moved"
print "\n#{rollback[/[^\/]*$/]} #{status}"
File.new(rollback, 'w').write(units)
puts