block commit to main using git hooks

block_commit_to_main.sh

#!/bin/bash

protected_branch='main'
current_branch=$(git symbolic-ref HEAD | sed -e 's,.*/\(.*\),\1,')

if [[ "$protected_branch" = "$current_branch" ]]; then
	input=''
	read -p "You're about to commit to master, is that what you intended? [y|n] " -n 1 -r </dev/tty

	if [[ "$input" == [yY] || "$input" == [yY][eE][sS] ]]; then
		exit 0 # commit will execute
	fi
	exit 1 # commit will not execute
else
	exit 0 # commit will execute
fi

just add this to a file named .git/hooks/post-commit