V8.00.000.2025.06.17

Signed-off-by: Marc S. Weidner <msw@coresecret.dev>

lib/cdi_0030_checks/0040_check_var.sh

@@ -0,0 +1,49 @@
+#!/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
+
+#######################################
+# Unbound Variable Check.
+# Globals:
+#   ERR_UNBOUND_VARIABLE
+#   GRE
+#   NL
+#   RED
+#   RES
+# Arguments:
+#   1: VAR_NAME to check NOT the variable itself.
+# Returns:
+#   ERR_UNBOUND_VARIABLE
+#######################################
+check_var() {
+  declare var_name_to_check="$1"
+
+  ### First check: Is the passed-in variable name itself set?
+  if ! [[ -v var_name_to_check ]]; then
+    printf "%b❌ Error: Variable NOT set: '%s'. Exiting Script. %b%b" "${RED}" "${var_name_to_check}" "${RES}" "${NL}" >&2
+    return "${ERR_UNBOUND_VARIABLE}"
+  fi
+
+  ### Second check: Is the variable referenced by var_name_to_check declared?
+  if [[ -v "${var_name_to_check}" ]]; then
+    if [[ -n "${!var_name_to_check}" ]]; then
+      printf "%b✅ Variable: '%s' exists and is NOT empty: '%s'. %b%b" "${GRE}" "${var_name_to_check}" "${!var_name_to_check}" "${RES}" "${NL}"
+    else
+      printf "%b✅ Variable: '%s' exists but is empty. %b%b" "${GRE}" "${var_name_to_check}" "${RES}" "${NL}"
+    fi
+  else
+    printf "%b❌ Error: Variable NOT declared: '%s'. Exiting Script. %b%b" "${RED}" "${var_name_to_check}" "${RES}" "${NL}" >&2
+    return "${ERR_UNBOUND_VARIABLE}"
+  fi
+}
+# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh