#!/bin/sh

# HTTP server.

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

getopts 'h' _ && usage
[ "$1" = '--' ] && shift
[ $# -ne 2 ] && usage

LOCK=.server.lock

if [ -f "$LOCK" ]; then
    echo >&2 "Error: A server is already running!"
    exit 1
fi

touch -- "$LOCK"
python3 -m http.server --directory="$2" "$1"
rm -- "$LOCK"