#!/bin/sh

# Ensure that the given files are ignored by git.

usage() {
    echo >&2 "Usage: "$0" [-h] [--] [<file> ...]"
    exit 2
}

getopts 'h' _ && usage
[ "$1" = '--' ] && shift

set -e

for file; do
    git check-ignore -q "$file" || echo "$file" >> .gitignore
done