#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-FileType: SOURCE
# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
# SPDX-PackageName: CISS.debian.live.builder
# SPDX-Security-Contact: security@coresecret.eu

guard_sourcing || return "${ERR_GUARD_SRCE}"

#######################################
# Removes secrets securely before 'lb build' execution.
# Globals:
#   BASH_SOURCE
#   VAR_TMP_SECRET
# Arguments:
#   None
# Returns:
#   0: on success
#######################################
x_remove() {
  printf "\e[95m++++ ++++ ++++ ++++ ++++ ++++ ++ 🧪 %s starting ... \e[0m\n" "${BASH_SOURCE[0]}"

  declare _old_nullglob="" _old_dotglob=""

  ### Enable nullglob/dotglob, disable failglob for safe globbing.
  _old_nullglob="$(shopt -p nullglob || true)"
  _old_dotglob="$( shopt -p dotglob  || true)"

  shopt -s nullglob dotglob

  if [[ "${VAR_SIGNER}" == "true" ]]; then

    # shellcheck disable=SC2312
    find "${VAR_TMP_SECRET}" -xdev -type f \
      ! -path "${VAR_TMP_SECRET}/signing_key_pass.txt" \
      ! -path "${VAR_TMP_SECRET}/luks.txt" \
      -print0 \
      | xargs -0 --no-run-if-empty shred -fzu -n 5 --

  else

    ### Removes secrets securely.
    # shellcheck disable=SC2312
    find "${VAR_TMP_SECRET}" -xdev -type f -print0 | xargs -0 --no-run-if-empty shred -fzu -n 5 --
    find "${VAR_TMP_SECRET}" -xdev -depth -type d -empty -delete

  fi

  eval "${_old_nullglob}" 2>/dev/null || true
  eval "${_old_dotglob}"  2>/dev/null || true

  printf "\e[92m++++ ++++ ++++ ++++ ++++ ++++ ++ ✅ %s successfully applied. \e[0m\n" "${BASH_SOURCE[0]}"

  return 0
}
### Prevents accidental 'unset -f'.
# shellcheck disable=SC2034
readonly -f x_remove
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
