From: Adam Salter <adam.q.salter@...>
Date: 2009-09-10T11:38:08+09:00
Subject: Change Ruby 1.9 file encoding mid read

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Content-Transfer-Encoding: 7bit
Content-Type: text/plain;
	charset=us-ascii;
	format=flowed;
	delsp=yes

Is it possible to change a file's encoding mid read?

Trying do do something along the lines of the following:

     file = File.open('testfile.rb', 'r:US-ASCII')
     file.each_line do |line|
       if (file.lineno == 1 || file.lineno == 2) && line =~ / 
^#.*coding:\s([\w-]+)/
         file.force_encoding($1)
       end
       next if line.valid_encoding?
       puts "bad encoding: [%s:%d]" % [file.path, file.lineno]
     end


-Adam



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