Marc S. Weidner
4b70ca7056
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🛡️ Shell Script Linting / 🛡️ Shell Script Linting (push) Successful in 1m35s
Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
43 lines
1.6 KiB
Bash
43 lines
1.6 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
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# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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#######################################
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# Prevent the caller LIB-file from being sourced twice.
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# Derive a safe guard-variable name from the caller script filename.
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# Globals:
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# BASH_SOURCE
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# Arguments:
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# $1: Explicitly provided Argument: filename of the caller LIB. (Better let the guard_sourcing() determine dynamically.)
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# Returns:
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# 0: Returns '0' in both cases as they are intended to be successful.
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#######################################
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guard_sourcing() {
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### Determine the caller script (the library being sourced).
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declare var_src="${1:-${BASH_SOURCE[1]}}"
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### Strip path, keep only filename
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declare var_file_name="${var_src##*/}"
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### Sanitize to valid var name.
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declare var_safe_name="${var_file_name//[^a-zA-Z0-9_]/_}"
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### Build guard-variable name.
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declare var_guard_var="_${var_safe_name}_LOADED"
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### If already loaded, abort sourcing
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if [[ -n "${!var_guard_var:-}" ]]; then
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return 0
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fi
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### Mark as loaded (readonly + exported)
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declare -grx "${var_guard_var}"=1
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return 0
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}
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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