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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/scoped_environment_variable_override.h"
#include "base/environment.h"
namespace base {
ScopedEnvironmentVariableOverride::ScopedEnvironmentVariableOverride(
const std::string& variable_name,
const std::string& value,
bool unset_var)
: environment_(Environment::Create()),
variable_name_(variable_name),
overridden_(false),
was_set_(false) {
was_set_ = environment_->GetVar(variable_name, &old_value_);
if (unset_var)
overridden_ = environment_->UnSetVar(variable_name);
else
overridden_ = environment_->SetVar(variable_name, value);
}
ScopedEnvironmentVariableOverride::ScopedEnvironmentVariableOverride(
const std::string& variable_name,
const std::string& value)
: ScopedEnvironmentVariableOverride(variable_name, value, false) {}
ScopedEnvironmentVariableOverride::ScopedEnvironmentVariableOverride(
const std::string& variable_name)
: ScopedEnvironmentVariableOverride(variable_name, "", true) {}
ScopedEnvironmentVariableOverride::ScopedEnvironmentVariableOverride(
ScopedEnvironmentVariableOverride&&) = default;
ScopedEnvironmentVariableOverride& ScopedEnvironmentVariableOverride::operator=(
ScopedEnvironmentVariableOverride&&) = default;
ScopedEnvironmentVariableOverride::~ScopedEnvironmentVariableOverride() {
if (environment_ && overridden_) {
if (was_set_)
environment_->SetVar(variable_name_, old_value_);
else
environment_->UnSetVar(variable_name_);
}
}
} // namespace base
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