#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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.installer
# SPDX-Security-Contact: security@coresecret.eu

### Options in "GRUB_CMDLINE_LINUX" are always effective.
### Options in "GRUB_CMDLINE_LINUX_DEFAULT" are effective ONLY during normal boot (NOT during recovery mode).

guard_sourcing

#######################################
# Helper module to extract the current GRUB CMDLINE strings.
# Globals:
#   TARGET
#   VAR_GRUB_CMDLINE_LINUX
#   VAR_GRUB_CMDLINE_LINUX_DEFAULT
#   VAR_ORIG_GRUB_CMDLINE_LINUX
#   VAR_ORIG_GRUB_CMDLINE_LINUX_DEFAULT
# Arguments:
#   None
#######################################
grub_extract_current_string() {
  # shellcheck disable=SC2155
  declare -gx VAR_ORIG_GRUB_CMDLINE_LINUX=$(grep -E 'GRUB_CMDLINE_LINUX=' "${TARGET}/etc/default/grub")
  # shellcheck disable=SC2155
  declare -gx VAR_ORIG_GRUB_CMDLINE_LINUX_DEFAULT=$(grep -E 'GRUB_CMDLINE_LINUX_DEFAULT=' "${TARGET}/etc/default/grub")
  # shellcheck disable=SC2155
  declare -gx VAR_GRUB_CMDLINE_LINUX=$(grep -E 'GRUB_CMDLINE_LINUX=' "${TARGET}/etc/default/grub" | sed 's/.$//')
  # shellcheck disable=SC2155
  declare -gx VAR_GRUB_CMDLINE_LINUX_DEFAULT=$(grep -E 'GRUB_CMDLINE_LINUX_DEFAULT=' "${TARGET}/etc/default/grub" | sed 's/.$//')
}

#######################################
# Helper module to finish the modified GRUB CMDLINE strings.
# Globals:
#   TARGET
#   VAR_GRUB_CMDLINE_LINUX
#   VAR_GRUB_CMDLINE_LINUX_DEFAULT
#   VAR_H
#   VAR_ORIG_GRUB_CMDLINE_LINUX
#   VAR_ORIG_GRUB_CMDLINE_LINUX_DEFAULT
# Arguments:
#   None
#######################################
grub_finalize_string() {
  VAR_GRUB_CMDLINE_LINUX="${VAR_GRUB_CMDLINE_LINUX}${VAR_H}"
  VAR_GRUB_CMDLINE_LINUX_DEFAULT="${VAR_GRUB_CMDLINE_LINUX_DEFAULT}${VAR_H}"
  sed -i "s/${VAR_ORIG_GRUB_CMDLINE_LINUX}/${VAR_GRUB_CMDLINE_LINUX}/" "${TARGET}/etc/default/grub"
  sed -i "s/${VAR_ORIG_GRUB_CMDLINE_LINUX_DEFAULT}/${VAR_GRUB_CMDLINE_LINUX_DEFAULT}/" "${TARGET}/etc/default/grub"
}
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh