Rename files in any given directory

rename files in directory

puts 'Renaming files...'

# a parameter to the program from command line. 

folder_path = ARGV[0] # /Users/a7madx7/Pictures/WallPapers

Dir.glob(folder_path + "/*").sort.each_with_index do |f, i|
    # prepare a the brand new 'renamed' complete file path.
    new_name = File.dirname(f) + '/' + i.to_s + File.extname(f)
    # do the actual renaming of the file.
    File.rename(f, new_name)
end

puts 'Renaming completed!'