A pre-commit hook which fails a commit if formatting issues are encountered (Flutter)

pre-commit

#!/bin/bash
red=`tput setaf 1`
green=`tput setaf 2`
reset=`tput sgr0`

fileList=$(git diff --diff-filter=d --cached --name-only | grep -E '\.(dart)$')
if [ ${#fileList} -lt 1 ]; then
	# No changes to dart files continue with git commit.
    exit
fi

filesWithIssues=$(flutter format --dry-run ${fileList[*]}) "$@"
if [ $? -ne 0 ]; then
	echo "${red}error: pre-commit hook failed. Error running flutter format${reset}"
    exit 1
fi
if [ -z "$filesWithIssues" ]; then 
	# No files found with formatting issues
	exit
else 
	echo "${red}error: pre-commit hook failed. Run flutter format for following files${reset}"
	echo -e "\n$filesWithIssues"
	exit 1
fi