pre-commit git hook to prevent unwanted direct commits to some branches – to be placed (and chmod +x'ed) in .git/hooks/

pre-commit

#!/usr/bin/env bash

restricted_branches=("develop")
forbidden_branches=("master")

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

if [[ " ${forbidden_branches[@]} " =~ " ${current_branch} " ]]; then
    echo "Direct commits to ${current_branch} are not allowed."
    exit 1
fi

if [[ " ${restricted_branches[@]} " =~ " ${current_branch} " ]]; then
    read -p "You're about to push to ${current_branch}. Are you sure this is what you want to do? [y|N]" -n 1 -r < /dev/tty
    echo
    if echo $REPLY | grep -E '^[Yy]$' > /dev/null
    then
        exit 0
    fi
    exit 1
fi