swiftlint script for git diff files with spaces

swiftlintdiff.sh

#!/bin/bash

function addFilesToLint {
    filename=""
    count=$2
    for item in $1
    do
      if [[ $item == *".swift"* ]]; then
        filename+="$item"
        export SCRIPT_INPUT_FILE_$count="$filename"
        count=$((count + 1))
        filename=""
      else
        filename+="$item "
      fi
    done
}

count=0
#grep returns result as array divided by newline
targets=$(git ls-files -om --exclude-from=.gitignore | grep -F ".swift")
addFilesToLint "${targets[0]}" $count

targets=$(git diff --cached --name-only | grep -F ".swift$")
addFilesToLint "${targets[0]}" $count

export -p | grep SCRIPT_INPUT_FILE

export SCRIPT_INPUT_FILE_COUNT=$count
swiftlint lint --use-script-input-files