The following script allows to automatically change the case of CMake script from upper to lower case.

cmake-command-to-lowercase.sh

#!/bin/sh
    
for file in $(find . -type f -name '*\.cmake' -o -name '*\.txt' -o -name '*\.ctest')
do
  echo "Processing file [$file]"
  for cmd in $(cmake --help-command-list)
    do
      sed -i "s/${cmd}(/${cmd}(/gI" $file
    done
done