Run swiftlint only on files changed from the latest commit

lint.sh

!/bin/sh
SAVEIFS=$IFS
IFS=$(echo -en "\n\b")
FILES=($(git ls-files -m | grep ".*\.swift$" | grep -v ".*R.generated.swift$"))

if [[ ${FILES[@]} ]]; then
export "SCRIPT_INPUT_FILE_COUNT"="${#FILES[@]}"
for i in "${!FILES[@]}"; do
  export "SCRIPT_INPUT_FILE_$i"="${FILES[$i]}"  
done

$SRCROOT/../Utils/swiftlint autocorrect --use-script-input-files
$SRCROOT/../Utils/swiftlint lint --use-script-input-files
fi
IFS=$SAVEIFS