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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/test/base/scoped_channel_override.h"
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include "base/environment.h"
#include "base/strings/cstring_view.h"
namespace chrome {
namespace {
// Exchanges the value of the environment variable `name` with `new_value`;
// returning its previous value or null if it was not set. The variable is
// removed from the environment if `new_value` is null.
std::optional<std::string> ExchangeEnvironmentVariable(
base::cstring_view name,
std::optional<std::string> new_value) {
auto environment = base::Environment::Create();
std::optional<std::string> old_value = environment->GetVar(name);
if (new_value)
environment->SetVar(name, *new_value);
else
environment->UnSetVar(name);
return old_value;
}
constexpr base::cstring_view kChromeVersionExtra = "CHROME_VERSION_EXTRA";
std::string GetVersionExtra(ScopedChannelOverride::Channel channel) {
switch (channel) {
case ScopedChannelOverride::Channel::kExtendedStable:
return "extended";
case ScopedChannelOverride::Channel::kStable:
return "stable";
case ScopedChannelOverride::Channel::kBeta:
return "beta";
case ScopedChannelOverride::Channel::kDev:
return "unstable";
#if BUILDFLAG(IS_LINUX)
case ScopedChannelOverride::Channel::kCanary:
return "canary";
#endif // BUILDFLAG(IS_LINUX)
}
}
} // namespace
ScopedChannelOverride::ScopedChannelOverride(Channel channel)
: old_env_var_(ExchangeEnvironmentVariable(kChromeVersionExtra,
GetVersionExtra(channel))) {}
ScopedChannelOverride::~ScopedChannelOverride() {
ExchangeEnvironmentVariable(kChromeVersionExtra, old_env_var_);
}
} // namespace chrome
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