42 lines
720 B
C++
42 lines
720 B
C++
#pragma once
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/**
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* @file
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*
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* Utilities for working with the current process's environment
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* variables.
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*/
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#include <optional>
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#include "types.hh"
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namespace nix {
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/**
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* @return an environment variable.
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*/
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std::optional<std::string> getEnv(const std::string & key);
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/**
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* @return a non empty environment variable. Returns nullopt if the env
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* variable is set to ""
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*/
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std::optional<std::string> getEnvNonEmpty(const std::string & key);
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/**
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* Get the entire environment.
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*/
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std::map<std::string, std::string> getEnv();
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/**
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* Clear the environment.
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*/
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void clearEnv();
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/**
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* Replace the entire environment with the given one.
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*/
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void replaceEnv(const std::map<std::string, std::string> & newEnv);
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}
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