#!/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

guard_sourcing

#######################################
# Use do_in_target() for:
#   simple commands (e.g., dpkg, ln, mkdir, apt, etc.)
# Use do_in_target_script() for:
#   all shell scripts, redirects, pipes, conditions, loops, or subshells
#######################################

#######################################
# Wrapper for executing commands in the desired chroot environment.
# Globals:
#   ERR_CHRT_COMMAND
#   TERM
# Arguments:
#   1: Target of the chroot environment.
#   2: Commands and options and parameters to be executed in chroot.
# Returns:
#   0: on success
#   ERR_CHRT_COMMAND: on failure
#######################################
do_in_target() {
  declare var_chroot_target="$1"
  shift
  declare -a ary_chroot_command=("$@")

  if (( ${#ary_chroot_command[@]} == 0 )); then
    do_log "emergency" "file_only" "Empty command passed to 'do_in_target()'."
    return "${ERR_CHRT_COMMAND}"
  fi

  if chroot "${var_chroot_target}" /usr/bin/env -i \
    HOME=/root \
    PATH=/usr/sbin:/usr/bin:/sbin:/bin \
    TERM="${TERM}" \
    LANG=C.UTF-8 \
    LC_ALL=C.UTF-8 \
    "${ary_chroot_command[@]}"
  then
    do_log "info" "file_only" "Success: chroot '${var_chroot_target}': '${ary_chroot_command[*]}'."
    return 0
  else
    do_log "emergency" "file_only" "Failed: chroot '${var_chroot_target}': '${ary_chroot_command[*]}'."
    return "${ERR_CHRT_COMMAND}"
  fi
}

#######################################
# Execute a full shell script line inside the chroot via bash -c.
# Supports interactive debug shell on error.
# Globals:
#   ERR_CHRT_COMMAND
#   TERM
#   DEBUG_INTERACTIVE (optional boolean)
# Arguments:
#   1: Target of the chroot environment
#   2: Command string to execute inside a shell (quoted)
# Returns:
#   0: on success
#   ERR_CHRT_COMMAND: on failure
#######################################
do_in_target_script() {
  declare var_chroot_target="$1"
  shift
  declare var_chroot_script="$1"

  if [[ -z "${var_chroot_script}" ]]; then
    do_log "emergency" "file_only" "Empty command passed to 'do_in_target_script()'."
    return "${ERR_CHRT_COMMAND}"
  fi

  # do_log "debug" "file_only" "Evaluating chroot script in '${var_chroot_target}': '${var_chroot_script}'."

  if chroot "${var_chroot_target}" /usr/bin/env -i \
    HOME=/root \
    PATH=/usr/sbin:/usr/bin:/sbin:/bin \
    TERM="${TERM}" \
    LANG=C.UTF-8 \
    LC_ALL=C.UTF-8 \
    /bin/bash -c "${var_chroot_script}"

  then

    do_log "info" "file_only" "Success: chroot '${var_chroot_target}': '${var_chroot_script}'."
    return 0

  else

    declare -i var_chroot_rc="${?}"
    do_log "emergency" "file_only" "Failure: chroot '${var_chroot_target}': '${var_chroot_script}'."
    do_log "info" "file_only" "Return code: '${var_chroot_rc}'."

    # TODO: Test with Dialog Wrapper in interactive mode.
    #if [[ "${DEBUG_INTERACTIVE}" == "true" ]]; then
    #  do_log "warning" "true" "Launching interactive debug shell in chroot: '${var_chroot_target}'."
    #  chroot "${var_chroot_target}" /bin/bash -l
    #fi

    return "${ERR_CHRT_COMMAND}"

  fi
}
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh