#!/bin/sh

git_toplevel=$(git rev-parse --show-toplevel)

check_for_diffs() {
        installed="$git_toplevel/.git/hooks/$1"
        latest="$git_toplevel/scripts/maint/$1.git-hook"

        if [ -e "$installed" ]
        then
               if ! cmp "$installed" "$latest" >/dev/null 2>&1
               then
                        echo "ATTENTION: $1 hook has changed:"
                        echo "==============================="
                        diff "$installed" "$latest"
                        exit 1
               fi
        fi
}

check_for_diffs "pre-push"
check_for_diffs "pre-commit"
check_for_diffs "post-merge"