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in shell bash: Read a file, get the md5 checksum, save it in a variable, make a copy of the file with the hash,
md5HASH=($(md5sum www/app/js/bundle.js| cut -d ' ' -f 1))
cp www/app/js/bundle.js www/app/js/bundle-$md5HASH.js;
# store in variable in file
echo "<?php define('HASH_EXT', '$md5HASH'); ?>" > www/app/inc/hash-bundle.php;
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