Git pre-commit hook to prevent checking in "nocheckin" or other specified strings.

git-show-staged.sh

#!/bin/sh
exec git show ":$1"

pre-commit

#!/bin/bash

declare -a arr=("nocheckin" "dbg!")

for i in "${arr[@]}"
do
    git diff --cached --name-only | xargs rg --with-filename --pre ".git/hooks/git-show-staged.sh" -n "$i" && echo "COMMIT REJECTED! Found '$i' references. Please remove them before commiting." && exit 1
done

exit 0