#!/bin/sh
# 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
# SPDX-Comment: Enforce merged-/usr symlinks inside the initramfs image.

set -eu

PREREQ=""
prereqs() { echo "${PREREQ}"; }
case $1 in
  prereqs) prereqs; exit 0 ;;
esac

. /usr/share/initramfs-tools/hook-functions

### Ensure target directories exist in the future initramfs root.
mkdir -p "${DESTDIR}/usr/bin" "${DESTDIR}/usr/sbin" "${DESTDIR}/usr/lib"

### Create/refresh the canonical symlinks (idempotent).
ln -sfn usr/bin  "${DESTDIR}/bin"
ln -sfn usr/sbin "${DESTDIR}/sbin"
ln -sfn usr/lib  "${DESTDIR}/lib"

### amd64 optional:
# shellcheck disable=2292
[ -d "${DESTDIR}/usr/lib64" ] && ln -sfn usr/lib64 "${DESTDIR}/lib64"

printf "\e[92mSuccessfully executed: [/etc/initramfs-tools/hooks/custom-usrmerge.sh] \n\e[0m"

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