(Ruby) Convert a File's Character Encoding from UTF-8 to UFT-8-BOM

To add a utf-8 BOM to a file is just a matter of prepending these 3 bytes to the file: 0xEF 0xBB 0xBF.

This may be difficult in some programming languages, or it may be trivial in either. Therefore, the Chilkat solution you see here might be helpful, or in a language such as C++, the Chilkat solution isn't really necessary because it's easy to do yourself.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

charset = Chilkat::CkCharset.new()

charset.put_FromCharset("utf-8")
charset.put_ToCharset("bom-utf-8")

success = charset.ConvertFile("qa_data/txt/helloWorld.txt","qa_output/helloWorldBom.txt")
if (success != true)
    print charset.lastErrorText() + "\n";
    exit
end

print "Success." + "\n";