#!/usr/bin/env sh
set -eu

# Example only. Copy to a local script and replace placeholder values.
# Do NOT commit secrets.

SHARE="//nas-host-or-ip/share-name"
MOUNT_POINT="/mnt/nas-backups"
CREDENTIALS_FILE="/etc/samba/credentials/nas-share-credentials"
USERNAME="replace-with-nas-user"
PASSWORD="replace-with-nas-password"

if [ "${USERNAME}" = "replace-with-nas-user" ] || [ "${PASSWORD}" = "replace-with-nas-password" ]; then
  echo "Edit USERNAME and PASSWORD placeholders before running this script."
  exit 1
fi

mkdir -p "${MOUNT_POINT}"
mkdir -p "$(dirname "${CREDENTIALS_FILE}")"

cat > "${CREDENTIALS_FILE}" <<'EOF'
username=__USERNAME__
password=__PASSWORD__
EOF
sed -i "s|__USERNAME__|${USERNAME}|g" "${CREDENTIALS_FILE}"
sed -i "s|__PASSWORD__|${PASSWORD}|g" "${CREDENTIALS_FILE}"
chmod 600 "${CREDENTIALS_FILE}"

mount -t cifs "${SHARE}" "${MOUNT_POINT}" \
  -o "credentials=${CREDENTIALS_FILE},vers=3.0,iocharset=utf8,uid=0,gid=0,file_mode=0600,dir_mode=0700"

echo ""
echo "Mounted ${SHARE} at ${MOUNT_POINT}"
echo ""
echo "To persist across reboot, add this line to /etc/fstab:"
echo "${SHARE} ${MOUNT_POINT} cifs credentials=${CREDENTIALS_FILE},vers=3.0,iocharset=utf8,uid=0,gid=0,file_mode=0600,dir_mode=0700,_netdev,nofail,x-systemd.automount 0 0"