#!/usr/bin/env bash
set -eo pipefail

if [[ "$1" == "-h" || "$1" == "--help" ]]; then
    cat <<EOF
Usage: $(basename "$0") [-h] <script>

Create a new bash script with boilerplate.

Options:
    -h, --help    Show this help message

Arguments:
    script        Script filename to create

EOF
    exit 0
fi

if [ ! $# -eq 1 ]; then
    echo 'mksh takes one argument' 1>&2
    exit 1
elif [ -e "$1" ]; then
    echo "$1 already exists" 1>&2
    exit 1
fi

{
    echo '#!/usr/bin/env bash'
    echo 'set -eo pipefail'
    echo
} > "$1"

chmod u+x "$1"
exec "$EDITOR" "$1"