This is a linux/*nix based solution that allows to recursively search and replace a pattern in all the files matching a certain pattern.
find . -iname "file_pattern" -type f -exec sed -i 's/search_pattern/replacement/g' {} \;
file_pattern: The pattern for matching the files to be modified. search_pattern: The pattern to look for inside the file. replace_pattern: The text that should replace search_pattern inside the file.
