mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-29 17:16:15 +02:00
8433027e35
At this point many features are stripped out, but this works:
- Can run libnix{util,store,expr} unit tests
- Can run some Nix commands
Co-Authored-By volth <volth@volth.com>
Co-Authored-By Brian McKenna <brian@brianmckenna.org>
56 lines
1 KiB
C++
56 lines
1 KiB
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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#ifdef _WIN32
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/**
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* Implementation of missing POSIX function.
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*/
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int unsetenv(const char * name);
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#endif
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/**
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* Like POSIX `setenv`, but always overrides.
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*
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* We don't need the non-overriding version, and this is easier to
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* reimplement on Windows.
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*/
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int setEnv(const char * name, const char * value);
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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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