여러 파일들 중에서 라인 수가 1인것만 골라서 삭제하려고합니다.

[hodong@hodong-pc ~]$ cat sa.x
aoeu
[hodong@hodong-pc ~]$ gedit sa.x
[hodong@hodong-pc ~]$ irb
irb(main):001:0> f = File.open("sa.x")
irb(main):002:0> pp f.read
"aoeu\n"
=> "aoeu\n"
irb(main):003:0>

# coding: utf-8
 
def repair_cp949 utf8
    begin
        utf8.unpack("U*").pack("C*").force_encoding("cp949").encode("utf-8")
    rescue Encoding::InvalidByteSequenceError
        # FIXME
        utf8
    end
end
 
def repair_recursive dir
    dirent = Dir.entries(dir) - [".", ".."]
    dirent.each do |path|
        if File.directory? path
            path2 = repair_cp949(path)
            `mv "#{path}" "#{path2}"` if path != path2
            Dir.chdir path2
            repair_recursive "."
            Dir.chdir ".."
        elsif File.file? path
            path2 = repair_cp949(path)
            `mv "#{path}" "#{path2}"` if path != path2
        end
    end
end
 
if ARGV.length.zero?
    repair_recursive "."
else
    repair_recursive ARGV[0]
end