[Work] ruby script for listing the folder sizes in a folder in reversed order

#ruby script for listing the folder sizes in a folder in reversed order

require 'find'
def sizer(dirname)
  sum=0
  Find.find(dirname) do |f|
       sum=sum+File.size(f)
#        puts f
#        puts sum
  end
  sum
end

dir=ARGV[0]

sa=Array.new #size array
pa=Array.new
Dir.foreach(dir) do |path|
   folder=dir+"/"+path
   if FileTest.directory?(folder)
       if(path!="." && path!=".." )
           pa.insert(-1, path);
           s=sizer(folder)
           sa.insert(-1, s)
       end
   end
end

#sorting
len=sa.size
for i in 0..len-2
   flag=0
   for j in 1..(len-1)
       if(sa[j]>sa[j-1])
           flag=1
           t=sa[j]
           sa[j]=sa[j-1]
           sa[j-1]=t
           t1=pa[j]
           pa[j]=pa[j-1]
           pa[j-1]=t1
       end
   end
   if(flag==0)
       break
   end
end

for i in 0..sa.size-1
   s=sa[i]
   g=(s/(1024*1024*1024)).to_i
   m=(s-g*1024*1024*1024)/(1024*1024).to_i
   k=((s-g*1024*1024*1024-m*1024*1024)/1024).to_i
   b=s-g*1024*1024*1024-m*1024*1024-k*1024
   #st="%03d"%g+"G "+"%03d"%m+"M "+"%03d"%k+"K "+"%03d"%b+"B "
   st=""
   if(g!=0)
       st=st+"%03d"%g+"G "
   else
       st=st+"     "
   end
   if(m!=0)
       st=st+"%03d"%m+"M "
   else
       st=st+"     "
   end
   if(k!=0)
       st=st+"%03d"%k+"K "
   else
       st=st+"     "
   end

   print(st)
   print("  "+pa[i]+"\n")
end