environ.hpp

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#pragma once
 
#include <string>
#include <vector>
 
#include "basic_types.hpp"
#include "shell_utils.hpp"
 
namespace subprocess {
    class EnvironSetter {
    public:
        EnvironSetter(const std::string& name);
        operator std::string() { return to_string(); }
        explicit operator bool() const;
        std::string to_string();
        EnvironSetter &operator=(const std::string &str);
        EnvironSetter &operator=(const char* str);
        EnvironSetter &operator=(std::nullptr_t) { return *this = (const char*)0;}
        EnvironSetter &operator=(int value);
        EnvironSetter &operator=(bool value);
        EnvironSetter &operator=(float value);
    private:
        std::string mName;
    };
 
    class Environ {
    public:
        EnvironSetter operator[](const std::string&);
    };
 
    extern Environ cenv;
 
    EnvMap current_env_copy();
    std::u16string create_env_block(const EnvMap& map);
 
    class CwdGuard {
    public:
        CwdGuard() {
            mCwd = subprocess::getcwd();
        }
        ~CwdGuard() {
            subprocess::setcwd(mCwd);
        }
 
    private:
        std::string mCwd;
    };
 
    class EnvGuard : public CwdGuard {
    public:
        EnvGuard() {
            mEnv = current_env_copy();
        }
        ~EnvGuard();
 
    private:
        EnvMap mEnv;
    };
 
 
}