17febd7bb3
Let's add some helpers to make accessing simple configuration values simpler. The helpers are used in the followup patches. GlobalConfiguration::option ensures that no value is returned rather than a value of YamlObject::empty. Signed-off-by: Milan Zamazal <mzamazal@redhat.com> Reviewed-by: Paul Elder <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2024-2025 Red Hat, inc.
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*
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* Global configuration handling
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*/
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#pragma once
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#include <filesystem>
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#include <optional>
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#include <string>
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#include <string_view>
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#include <libcamera/base/utils.h>
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#include "libcamera/internal/yaml_parser.h"
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namespace libcamera {
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class GlobalConfiguration
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{
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public:
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using Configuration = const YamlObject &;
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GlobalConfiguration();
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unsigned int version() const;
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Configuration configuration() const;
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template<typename T>
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std::optional<T> option(
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const std::initializer_list<std::string_view> confPath) const
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{
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const YamlObject *c = &configuration();
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for (auto part : confPath) {
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c = &(*c)[part];
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if (!*c)
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return {};
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}
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return c->get<T>();
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}
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std::optional<std::vector<std::string>> listOption(
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const std::initializer_list<std::string_view> confPath) const;
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std::optional<std::string> envOption(
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const char *const envVariable,
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const std::initializer_list<std::string_view> confPath) const;
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std::optional<std::vector<std::string>> envListOption(
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const char *const envVariable,
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const std::initializer_list<std::string_view> confPath,
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const std::string delimiter = ":") const;
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private:
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bool loadFile(const std::filesystem::path &fileName);
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void load();
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std::unique_ptr<YamlObject> yamlConfiguration_ =
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std::make_unique<YamlObject>();
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};
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} /* namespace libcamera */
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