Simple ruby script to spot encoding errors on a given in params.

spot_encoding_errors.rb

#!/usr/bin/env ruby
file = ARGV.first
 
count = %x( wc -l #{file}).split.first.to_i
puts "Number of line in the file: #{count}"
 
min = 0
max = count
 
 
while  max - min > 2
  n = (max + min)/2
  %x( tail -n +#{n} #{file} > tmp)
  error =  %x( file --mime tmp).gsub(/.*charset=([^ ]*).*/, '\1').chomp == 'binary'
  puts "#{n}"
  error ? min = n : max = n
end
 
puts ""
if n > 1
  puts "Error spotted on line: #{n}"
  puts ""
  puts "Run this script again to spot mode encoding errors"
else
  puts "no errors spotted"
end