113 lines
4.0 KiB
C++
113 lines
4.0 KiB
C++
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2018 KiCad Developers, see AUTHORS.txt for contributors.
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file env_vars.h
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* Functions related to environment variables, including help functions
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*/
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#ifndef ENV_VARS_H
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#define ENV_VARS_H
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#include <wx/string.h>
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#include <map>
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#include <vector>
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#include <optional>
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class ENV_VAR_ITEM;
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namespace ENV_VAR
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{
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using ENV_VAR_LIST = std::vector<wxString>;
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/**
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* Determine if an environment variable is "predefined", i.e. if the
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* name of the variable is special to KiCad, and isn't just a user-specified
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* substitution name.
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* @param aEnvVar the variable to check
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* @return true if predefined
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*/
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bool IsEnvVarImmutable( const wxString& aEnvVar );
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/**
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* Get the list of pre-defined environment variables.
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*/
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const ENV_VAR_LIST& GetPredefinedEnvVars();
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/**
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* Constructs a versioned environment variable based on this KiCad major version
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* @param aBaseName is the suffix, like TEMPLATE_DIR
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* @return an environment variable name, like KICAD8_TEMPLATE_DIR
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*/
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wxString GetVersionedEnvVarName( const wxString& aBaseName );
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/**
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* Attempts to retrieve the value of a versioned environment variable, such as
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* KICAD8_TEMPLATE_DIR. If this value exists in the map, it will be returned. If not, the
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* map will be searched for keys matching KICAD*_<aBaseName>, and the first match's value will
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* be returned. If there are no matches, std::nullopt will be returned.
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* @param aMap is an ENV_VAR_MAP (@see environment.h)
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* @param aBaseName is the suffix for the environment variable (@see GetVersionedEnvVarName)
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*/
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std::optional<wxString> GetVersionedEnvVarValue( const std::map<wxString, ENV_VAR_ITEM>& aMap,
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const wxString& aBaseName );
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/**
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* Look up long-form help text for a given environment variable.
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*
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* This is intended for use in more verbose help resources (as opposed to
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* tooltip text)
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*
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* @param aEnvVar The variable to look up
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* @return A string with help for that variable. Empty if
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* no help available for this variable.
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*/
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wxString LookUpEnvVarHelp( const wxString& aEnvVar );
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/**
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* Get an environment variable as a specific type, if set correctly
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*
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* @param aEnvVarName the name of the environment variable
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* @return an std::optional containing the value, if set and parseable, otherwise empty.
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*/
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template <typename VAL_TYPE>
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std::optional<VAL_TYPE> GetEnvVar( const wxString& aEnvVarName );
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/**
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* Get a string environment variable, if it is set.
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*
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* @param aEnvVarName the name of the environment variable
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* @return an std::optional containing the value, if set, otherwise empty.
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*/
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template<>
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std::optional<wxString> GetEnvVar( const wxString& aEnvVarName );
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/**
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* Get a double from an environment variable, if set
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*
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* @param aEnvVarName the name of the environment variable
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* @return an std::optional containing the value, if set and parseable as a double,
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* otherwise empty.
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*/
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template <>
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std::optional<double> GetEnvVar( const wxString& aEnvVarName );
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};
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#endif /* ENV_VARS_H */
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