批量替换文件名及文件内容

require 'FileUtils'

def string_replace(rep_set, str)
  rep_set.each_with_index do |h, idx|
    re = Regexp.new h.keys[0]
    if str =~ re
      str.gsub!(re, h.values[0])
    end
  end
  str
end

def dir_traverse(dir, regexp, &block)
  Dir.open(dir) do |dir|
    dir.each do |sd|
      if [".", ".."].include? sd
        next
      end
      fd = "%s\\%s"%[dir.path, sd]
      if File.directory?(fd)
        dir_traverse(fd, regexp, &block)
      elsif sd =~ regexp
          block.call fd #yield fd
      end
    end
  end
end

def fileContent_replace(file_name, rep_set)
  File.open(file_name, 'r+') do |file|
    fc = ''
    file.each_with_index do |line, number|
      string_replace rep_set, line
      fc << line
    end
    file.seek 0
    file.truncate 0
    file.write fc
  end
end

def change_fileContent_under_folder(rep_set, fregexp, dir)
  dir_traverse(dir, fregexp) do |fpath|
    fileContent_replace(fpath, rep_set)
  end
end

def rename_file rep_set, oldfilename
  dir = File.dirname(oldfilename)
  oldfile = oldfilename.split("\\")[-1]
  newfile = string_replace rep_set, oldfile.dup
  newfilename = "%s\\%s"%[dir, newfile]  # {dir}\\#{newfile}"  
  puts oldfilename
  puts newfilename

  if newfilename != oldfilename
    File.rename(oldfilename, newfilename)
  end
end

def change_fileName_under_folder(rep_set, fregexp, dir)
  dir_traverse(dir, fregexp) do |fpath|
    rename_file(rep_set, fpath)
  end
end

if __FILE__ == $0
  #example 1, usage of change_fileName_under_folder
  dir = 'C:\test' #this directory will be traversed
  fregexp = Regexp.new(".txt$") #file name end with ".txt"
  rep_set = [{'^create_'=>'crt_'}] # initialed "creat_" in file name will be replaced with "crt_"
  change_fileName_under_folder(rep_set, fregexp, dir)

  #example 2, usage of change_fileContent_under_folder
  dir = 'C:\test' #this directory will be traversed
  fregexp = Regexp.new(".txt$") #file name end with ".txt"
  rep_set = [{'delete_'=>'dlt_'}, {'create'=>'crt_'}] # "delete_" and "create_" in the file will be replaced by "dlt", "crt_" respectively
  change_fileContent_under_folder rep_set, fregexp, dir
end