Syncd Just a script I knocked up for a friend. Use case for it was they had a small HDD they wished to sync to a larger data set. They would then delete the files gradually and only sync newer files, or files that they previously had no space to sync with. Basically this is a system that remembers previously deleted files and makes sure they don…

sync.rb

require 'fileutils'
require 'pathname'
require 'digest'
require 'colorize'

class Syncd

    def initialize
        @dir = '/Volumes/MUSIC'
        @remote = '/Users/richard/mew'
        @currentDir = @dir
        @crumbName = '.syncd'
    end

    def sync(dir = nil)
        dir = @dir unless dir
        Dir.foreach(dir) { |f|
            path = dir + '/' + f
            next if (f == '..' || f == '.')
            if File.directory?(path)
                self.sync(path)
            else
                self.syncFile(path)
            end
        }
    end

    @private
    def previouslySyncd(file)
        filename = File.basename(file)
        syncdCrumb = File.dirname(file) + "/#{@crumbName}"
        if !File.exists?(syncdCrumb)
            FileUtils.touch(syncdCrumb)
        end

        if File.readlines(syncdCrumb).grep(filename).size == 0
            open(syncdCrumb, 'a') { |f|
              f.puts File.basename(file)
            }
            return false
        else
            return true
        end
    end

    def fileIsIdentical(file, remoteFile)
        return false unless File.exists?(remoteFile)
        return FileUtils.compare_file(file, remoteFile)
    end

    def syncFile(file)
        remoteFile = @remote + file[@dir.size..file.size]
        print "Syncing #{file}...  ".light_green
        if !previouslySyncd(file) && !fileIsIdentical(file, remoteFile)
            begin
                Dir.mkdir(File.dirname(remoteFile)) unless File.exists?(File.dirname(remoteFile))
                FileUtils.cp(file, remoteFile)
                puts "Success!".green
            rescue Exception => e
                puts "Error: #{e}".red
            end
        else
            puts "Skipped, no need to sync".blue
        end
    end

end

syncd = Syncd.new()
syncd.sync()