Batch rename files

batch_rename.rb

# Recursive scan a dir, & perform each-file rename operation:

def batch_files_from_dir(basepath)
    sub_dirs = Array.new
    Dir.new(basepath).entries.each { |subpath|
        path = File.join(basepath, subpath)
        if File.file?(path) then
            if /0000[0-9]{3}$/.match(path) then
                puts "#{path}"
                new_path = path.gsub(/0000[0-9]{3}$/, '')
                File.rename(path, new_path)
                puts "\t--->#{new_path}"
            end
        elsif subpath!="." and subpath!=".." and File.directory?(path) then
            batch_files_from_dir(path)
        end
    }
end

ARGV.each{ |path|
    batch_files_from_dir( path )
}