#!/usr/bin/env ruby

from = ARGV.shift
to = ARGV.shift

ARGV.each { |l|
  if File.symlink?(l)
    tgt = File.readlink(l)
    if tgt.gsub!(from, to)
      File.unlink(l)
      puts "#{tgt} -> #{l}"
      File.symlink(tgt, l)
    else
      warn "#{l} doesn't match #{from}, skipping"
    end
  else
    warn "#{l} is not a symlink, skipping"
  end
}