fix scrambled files in Perforce

find_utc16.rb

require 'pp'
require 'fileutils'

 class PerforceFileFix

  def initialize open_files
    @open_files = open_files 
  end

  def self.utf_16_be_bom? file
    begin
      lines = IO.readlines(file) 
      return false if lines.nil? || lines.length == 0
      buffer = lines[0].each_byte.map{|x| x}
      return (buffer[0] == 255 && buffer[1] == 254)
    rescue Exception => e 
      puts file 
    end
  end

  def encode_line line, from_encoding, to_encoding
    ec = Encoding::Converter.new(from_encoding, to_encoding, :universal_newline => true )
    dst = ""
    ec.primitive_convert(line,dst)
    dst
  end

  def write_line f, line
    line = encode_line line, 'utf-16be', 'utf-16'
    f.puts line
  end

  def write_first_line f, line
    line = encode_line line,'utf-16', 'utf-16be'
    f.puts line
  end

  def file_open? file 
    open = false 
    @open_files.each do |current_open_file| 
      open = true if current_open_file.include?(file) 
      break if open 
    end
    open
  end

  def convert file
    return if file_open?(file)
    convert_file file 
    p4_edit file 
    copy_over file
    p4_submit file
    File.delete temp_file_name(file)  
  end

  def copy_over file 
    FileUtils.copy_entry(temp_file_name(file), source_file(file), :remove_destinatation => true  )
  end

  def temp_file_name file 
    "./conversion/#{File.basename(file)}"
  end

  def source_file file 
    "./#{file}"
  end

  def convert_file file 
    File.open(temp_file_name(file), "w:UTF-16") do |f|
      lines = IO.readlines(source_file(file)) 
      write_first_line(f,lines[0])
      (1..lines.length).each do |idx|
        write_line(f,lines[idx])
      end
    end
  end

  def p4_edit file
    system("p4 edit -t utf16 #{file}")
  end

  def p4_submit file
    message = %q("changed text type")
    system( "p4 submit -d #{message} #{file}"  )
  end

end





def desired_extension?file  
  ['.sql', '.cfm', '.cs', '.rb', '.html', '.js', '.htm'].include?(File.extname(file))
  # ['.sql' ].include?(File.extname(file))
end

def interesting_files 
  Dir.glob("**/*.*").map do |file|
    next unless desired_extension?(file)  
    file
  end
end

 
system('p4 opened -a //depot...  > openfiles.txt')
open_files = IO.readlines('openfiles.txt')
File.delete('openfiles.txt')

interesting_files.each do |file|
  puts "current#{file}"
  if PerforceFileFix.utf_16_be_bom?(file)
    PerforceFileFix.new(open_files).convert(file)
  end
end