1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// 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),
old_value_(environment_->GetVar(variable_name)) {
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 (old_value_.has_value()) {
environment_->SetVar(variable_name_, old_value_.value());
} else {
environment_->UnSetVar(variable_name_);
}
}
}
} // namespace base
|
