env_vars.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2018-2021 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <env_vars.h>

#include <map>

#include <wx/translation.h>
#include <wx/utils.h>

using STRING_MAP = std::map<wxString, wxString>;

/*
 * List of pre-defined environment variables
 *
 * TODO - Instead of defining these values here,
 * extract them from elsewhere in the program
 * (where they are originally defined)
 */
static const ENV_VAR::ENV_VAR_LIST predefinedEnvVars = {
 "KIPRJMOD",
 "KICAD6_SYMBOL_DIR",
 "KICAD6_3DMODEL_DIR",
 "KICAD6_FOOTPRINT_DIR",
 "KICAD6_TEMPLATE_DIR",
 "KICAD_USER_TEMPLATE_DIR",
 "KICAD_PTEMPLATES",
 "KICAD6_3RD_PARTY",
};


bool ENV_VAR::IsEnvVarImmutable( const wxString& aEnvVar )
{
 for( const auto& s : predefinedEnvVars )
 {
 if( s == aEnvVar )
 return true;
 }

 return false;
}


const ENV_VAR::ENV_VAR_LIST& ENV_VAR::GetPredefinedEnvVars()
{
 return predefinedEnvVars;
}


static void initialiseEnvVarHelp( STRING_MAP& aMap )
{
 // Set up dynamically, as we want to be able to use _() translations,
 // which can't be done statically
 aMap["KICAD6_FOOTPRINT_DIR"] =
 _( "The base path of locally installed system "
 "footprint libraries (.pretty folders).");
 aMap["KICAD6_3DMODEL_DIR"] =
 _( "The base path of system footprint 3D shapes (.3Dshapes folders).");
 aMap["KICAD6_SYMBOL_DIR"] =
 _( "The base path of the locally installed symbol libraries.");
 aMap["KICAD6_TEMPLATE_DIR"] =
 _( "A directory containing project templates installed with KiCad.");
 aMap["KICAD_USER_TEMPLATE_DIR"] =
 _( "Optional. Can be defined if you want to create your own project "
 "templates folder.");
 aMap["KICAD6_3RD_PARTY"] =
 _( "A directory containing 3rd party plugins, libraries and other "
 "downloadable content.");
 aMap["KIPRJMOD"] =
 _("Internally defined by KiCad (cannot be edited) and is set "
 "to the absolute path of the currently loaded project file. This environment "
 "variable can be used to define files and paths relative to the currently loaded "
 "project. For instance, ${KIPRJMOD}/libs/footprints.pretty can be defined as a "
 "folder containing a project specific footprint library named footprints.pretty." );
 aMap["KICAD6_SCRIPTING_DIR"] =
 _( "A directory containing system-wide scripts installed with KiCad" );
 aMap["KICAD6_USER_SCRIPTING_DIR"] =
 _( "A directory containing user-specific scripts installed with KiCad" );

 // Deprecated vars
 aMap["KICAD_PTEMPLATES"] =
 _( "Deprecated version of KICAD_TEMPLATE_DIR.");
 aMap["KISYS3DMOD"] =
 _( "Deprecated version of KICAD6_3DMODEL_DIR." );
 aMap["KISYSMOD"] =
 _( "Deprecated version of KICAD6_FOOTPRINT_DIR." );
 aMap["KICAD_SYMBOL_DIR"] =
 _( "Deprecated version of KICAD_SYMBOL_DIR.");
}


wxString ENV_VAR::LookUpEnvVarHelp( const wxString& aEnvVar )
{
 static STRING_MAP envVarHelpText;

 if( envVarHelpText.size() == 0 )
 initialiseEnvVarHelp( envVarHelpText );

 return envVarHelpText[ aEnvVar ];
}


template<>
OPT<double> ENV_VAR::GetEnvVar( const wxString& aEnvVarName )
{
 wxString env;

 if( wxGetEnv( aEnvVarName, &env ) )
 {
 double value;

 if( env.ToDouble( &value ) )
 return value;
 }

 return NULLOPT;
}


template<>
OPT<wxString> ENV_VAR::GetEnvVar( const wxString& aEnvVarName )
{
 OPT<wxString> optValue;

 wxString env;

 if( wxGetEnv( aEnvVarName, &env ) )
 {
 optValue = env;
 }

 return optValue;
}