environment-variables.hh File Reference

#include <map>
#include <optional>
#include <string>

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Functions
std::optional< std::string >	nix::getEnv (const std::string &key)
std::optional< std::string >	nix::getEnvNonEmpty (const std::string &key)
std::map< std::string, std::string >	nix::getEnv ()
void	nix::clearEnv ()
void	nix::replaceEnv (const std::map< std::string, std::string > &newEnv)

Detailed Description

Utilities for working with the current process's environment variables.

Function Documentation

clearEnv()

void nix::clearEnv

(

)

Clear the environment.

getEnv() [1/2]

std::map< std::string, std::string > nix::getEnv

(

)

Get the entire environment.

getEnv() [2/2]

std::optional< std::string > nix::getEnv

(

const std::string &

key

)

Returns

an environment variable.

getEnvNonEmpty()

std::optional< std::string > nix::getEnvNonEmpty

(

const std::string &

key

)

Returns

a non empty environment variable. Returns nullopt if the env variable is set to ""

replaceEnv()

void nix::replaceEnv

(

const std::map< std::string, std::string > &

newEnv

)

Replace the entire environment with the given one.