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// Copyright 2012 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/common/channel_info.h"
#import <Foundation/Foundation.h>
#include <tuple>
#include "base/apple/bundle_locations.h"
#include "base/check.h"
#include "base/no_destructor.h"
#include "base/strings/sys_string_conversions.h"
#include "build/branding_buildflags.h"
#include "components/version_info/version_info.h"
namespace chrome {
namespace {
struct ChannelState {
std::string name;
bool is_extended_stable;
};
#if BUILDFLAG(GOOGLE_CHROME_BRANDING)
// Returns a ChannelState given a KSChannelID value.
ChannelState ParseChannelId(NSString* channel) {
// KSChannelID values:
//
// Intel Arm Universal
// ┌───────────┬────────────────┬────────────────────┐
// Stable │ (not set) │ arm64 │ universal │
// Extended Stable │ extended │ arm64-extended │ universal-extended │
// Beta │ beta │ arm64-beta │ universal-beta │
// Dev │ dev │ arm64-dev │ universal-dev │
// Canary │ canary │ arm64-canary │ universal-canary │
// └───────────┴────────────────┴────────────────────┘
if (!channel || [channel isEqual:@"arm64"] ||
[channel isEqual:@"universal"]) {
return ChannelState{"", false}; // "" means stable channel.
}
if ([channel hasPrefix:@"arm64-"])
channel = [channel substringFromIndex:[@"arm64-" length]];
else if ([channel hasPrefix:@"universal-"])
channel = [channel substringFromIndex:[@"universal-" length]];
if ([channel isEqual:@"extended"])
return ChannelState{"", true}; // "" means stable channel.
if ([channel isEqual:@"beta"] || [channel isEqual:@"dev"] ||
[channel isEqual:@"canary"]) {
return ChannelState{base::SysNSStringToUTF8(channel), false};
}
return ChannelState{"unknown", false};
}
// Returns the ChannelState for this browser based on how it is registered with
// Keystone.
ChannelState DetermineChannelState() {
// Use the main Chrome application bundle and not the framework bundle.
// Keystone keys don't live in the framework.
NSBundle* bundle = base::apple::OuterBundle();
if (![bundle objectForInfoDictionaryKey:@"KSProductID"]) {
// This build is not Keystone-enabled; it can't have a channel.
return ChannelState{"unknown", false};
}
return ParseChannelId([bundle objectForInfoDictionaryKey:@"KSChannelID"]);
}
#endif // BUILDFLAG(GOOGLE_CHROME_BRANDING)
// For a branded build, returns its ChannelState: `name` of "" (for stable or
// extended), "beta", "dev", "canary", or "unknown" (in the case where the
// channel could not be determined or is otherwise inapplicable), and an
// `is_extended_stable` with a value corresponding to whether it is an extended
// stable build or not.
//
// For an unbranded build, always returns a ChannelState with `name` of "" and
// `is_extended_stable` of false.
ChannelState& GetChannelState() {
static base::NoDestructor<ChannelState> channel([] {
#if BUILDFLAG(GOOGLE_CHROME_BRANDING)
return DetermineChannelState();
#else
return ChannelState{"", false};
#endif
}());
return *channel;
}
bool SideBySideCapable() {
#if BUILDFLAG(GOOGLE_CHROME_BRANDING)
static const bool capable = [] {
// Use the main Chrome application bundle and not the framework bundle.
// Keystone keys don't live in the framework.
NSBundle* bundle = base::apple::OuterBundle();
if (![bundle objectForInfoDictionaryKey:@"KSProductID"]) {
// This build is not Keystone-enabled, and without a channel assume it is
// side-by-side capable.
return true;
}
if (GetChannelState().name.empty()) {
// GetChannelState() returns an empty name for the regular and extended
// stable channels. These stable Chromes are what side-by-side capable
// Chromes are running side-by-side *to* and by definition are
// side-by-side capable.
return true;
}
// If there is a CrProductDirName key, then the user data dir of this
// beta/dev/canary Chrome is separate, and it can run side-by-side to the
// stable Chrome.
return [bundle objectForInfoDictionaryKey:@"CrProductDirName"] != nil;
}();
return capable;
#else
return true;
#endif
}
} // namespace
void CacheChannelInfo() {
std::ignore = GetChannelState();
std::ignore = SideBySideCapable();
}
std::string GetChannelName(WithExtendedStable with_extended_stable) {
const auto& channel = GetChannelState();
if (channel.is_extended_stable && with_extended_stable.value())
return "extended";
return channel.name;
}
version_info::Channel GetChannelByName(const std::string& channel) {
#if BUILDFLAG(GOOGLE_CHROME_BRANDING)
if (channel.empty() || channel == "extended")
return version_info::Channel::STABLE;
if (channel == "beta")
return version_info::Channel::BETA;
if (channel == "dev")
return version_info::Channel::DEV;
if (channel == "canary")
return version_info::Channel::CANARY;
#endif
return version_info::Channel::UNKNOWN;
}
bool IsSideBySideCapable() {
return SideBySideCapable();
}
version_info::Channel GetChannel() {
return GetChannelByName(GetChannelState().name);
}
bool IsExtendedStableChannel() {
return GetChannelState().is_extended_stable;
}
#if BUILDFLAG(GOOGLE_CHROME_BRANDING)
namespace {
// True following a call to SetChannelIdForTesting.
bool channel_id_is_overidden_ = false;
} // namespace
void SetChannelIdForTesting(const std::string& channel_id) {
DCHECK(!channel_id_is_overidden_);
GetChannelState() = ParseChannelId(
channel_id.empty() ? nullptr : base::SysUTF8ToNSString(channel_id));
channel_id_is_overidden_ = true;
}
void ClearChannelIdForTesting() {
DCHECK(channel_id_is_overidden_);
channel_id_is_overidden_ = false;
GetChannelState() = DetermineChannelState();
}
#endif // BUILDFLAG(GOOGLE_CHROME_BRANDING)
} // namespace chrome
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