git_ftp.rb

require 'net/ftp'


class FtpStorage

  def initialize(host, username, password)
    connect(host, username, password)
  end

  def connect(host, username, password)
    @host, @username, @password = host, username, password

    @ftp = Net::FTP.new(@host)
    @ftp.passive = true
    @ftp.debug_mode = true
    @ftp.login(@username, @password)
  end

  def download(filepath)
    @ftp.getbinaryfile(filepath, filepath)
  end

  def close
    @ftp.close
  end

end

class GitChange

  attr_accessor :operation
  attr_accessor :filepath

  def self.from_line(line)
    change_names = {'M' => :modified, 'C' => :copied, 'R' => :renamed, 'A' => :added, 'D' => :deleted, 'U' => :unmerged}

    operation = change_names[ line[0] ]
    filepath = line[1..-1].strip

    GitChange.new(operation, filepath)
  end

  def initialize(operation, filepath)
    self.operation = operation
    self.filepath = filepath
  end

  def modified?
    operation == :modified
  end
  alias_method :changed?, :modified?

  def copied?
    operation == :copied
  end

  def renamed?
    operation == :renamed
  end

  def added?
    operation == :added
  end
  alias_method :created?, :added?

  def deleted?
    operation == :deleted
  end

  def unmerged?
    operation == :unmerged
  end

  def to_s
    "#{operation}: #{filepath}"
  end

end

class GitChangeset < Array

  def self.of_cwd(a, b)
    changes = GitChangeset.new

    command = "git diff --name-status #{a} #{b}"
    output = IO.popen(command)
    output.readlines.each do |line|
      changes << GitChange.from_line(line)
    end

    return changes
  end

  def with_operation(op)
    op = op.to_sym
    keep_if { |change| change.operation == op }
  end

  def modified
    with_operation(:modified)
  end

  def added
    with_operation(:added)
  end

  def deleted
    with_operation(:deleted)
  end

end



#storage = FtpStorage.new('50.63.212.1', 'venkatdinavahi', 'Dinavahi1979')
#storage.download('2012/rotem/contact.php')
#storage.close

changes = GitChangeset.of_cwd('HEAD~1', 'HEAD~3')

changes.added.each do |change|
  puts change
end