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//===-- BuildSystemFrontend.cpp -------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "llbuild/BuildSystem/BuildSystemFrontend.h"
#include "llbuild/Basic/Defer.h"
#include "llbuild/Basic/ExecutionQueue.h"
#include "llbuild/Basic/FileSystem.h"
#include "llbuild/Basic/LLVM.h"
#include "llbuild/Basic/PlatformUtility.h"
#include "llbuild/BuildSystem/BuildDescription.h"
#include "llbuild/BuildSystem/BuildFile.h"
#include "llbuild/BuildSystem/BuildKey.h"
#include "llbuild/BuildSystem/BuildValue.h"
#include "llbuild/BuildSystem/Command.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include <atomic>
#include <memory>
#include <mutex>
#include <thread>
using namespace llbuild;
using namespace llbuild::basic;
using namespace llbuild::buildsystem;
#pragma mark - BuildSystemInvocation implementation
void BuildSystemInvocation::getUsage(int optionWidth, raw_ostream& os) {
const struct Options {
llvm::StringRef option, helpText;
} options[] = {
{ "--help", "show this help message and exit" },
{ "--version", "show the tool version" },
{ "-C <PATH>, --chdir <PATH>", "change directory to PATH before building" },
{ "--no-db", "disable use of a build database" },
{ "--db <PATH>", "enable building against the database at PATH" },
{ "-f <PATH>", "load the build task file at PATH" },
{ "--serial", "do not build in parallel" },
{ "--scheduler <SCHEDULER>", "set scheduler algorithm" },
{ "-j,--jobs <JOBS>", "set how many concurrent jobs (lanes) to run" },
{ "-v, --verbose", "show verbose status information" },
{ "--trace <PATH>", "trace build engine operation to PATH" },
};
for (const auto& entry: options) {
os << " " << llvm::format("%-*s", optionWidth, entry.option.str().c_str()) << " "
<< entry.helpText << "\n";
}
}
void BuildSystemInvocation::parse(llvm::ArrayRef<std::string> args,
llvm::SourceMgr& sourceMgr) {
auto error = [&](const Twine &message) {
sourceMgr.PrintMessage(llvm::SMLoc{}, llvm::SourceMgr::DK_Error, message);
hadErrors = true;
};
while (!args.empty()) {
const auto& option = args.front();
args = args.slice(1);
if (option == "-") {
for (const auto& arg: args) {
positionalArgs.push_back(arg);
}
break;
}
if (!option.empty() && option[0] != '-') {
positionalArgs.push_back(option);
continue;
}
if (option == "--help") {
showUsage = true;
break;
} else if (option == "--version") {
showVersion = true;
break;
} else if (option == "--no-db") {
dbPath = "";
} else if (option == "--db") {
if (args.empty()) {
error("missing argument to '" + option + "'");
break;
}
dbPath = args[0];
args = args.slice(1);
} else if (option == "-C" || option == "--chdir") {
if (args.empty()) {
error("missing argument to '" + option + "'");
break;
}
chdirPath = args[0];
args = args.slice(1);
} else if (option == "-f") {
if (args.empty()) {
error("missing argument to '" + option + "'");
break;
}
buildFilePath = args[0];
args = args.slice(1);
} else if (option == "--serial") {
useSerialBuild = true;
} else if (option == "--scheduler") {
if (args.empty()) {
error("missing argument to '" + option + "'");
break;
}
auto algorithm = args[0];
if (algorithm == "commandNamePriority" || algorithm == "default") {
schedulerAlgorithm = SchedulerAlgorithm::NamePriority;
} else if (algorithm == "fifo") {
schedulerAlgorithm = SchedulerAlgorithm::FIFO;
} else {
error("unknown scheduler algorithm '" + algorithm + "'");
break;
}
args = args.slice(1);
} else if (option == "-j" || option == "--jobs") {
if (args.empty()) {
error("missing argument to '" + option + "'");
break;
}
char *end;
schedulerLanes = ::strtol(args[0].c_str(), &end, 10);
if (*end != '\0') {
error("invalid argument '" + args[0] + "' to '" + option + "'");
}
args = args.slice(1);
} else if (StringRef(option).startswith("-j")) {
char *end;
schedulerLanes = ::strtol(&option[2], &end, 10);
if (*end != '\0') {
error("invalid argument to '-j'");
}
} else if (option == "-v" || option == "--verbose") {
showVerboseStatus = true;
} else if (option == "--trace") {
if (args.empty()) {
error("missing argument to '" + option + "'");
break;
}
traceFilePath = args[0];
args = args.slice(1);
} else {
error("invalid option '" + option + "'");
break;
}
}
}
std::string BuildSystemInvocation::formatDetectedCycle(const std::vector<core::Rule*>& cycle) {
// Compute a description of the cycle path.
SmallString<256> message;
llvm::raw_svector_ostream os(message);
os << "cycle detected while building: ";
bool first = true;
for (const auto* rule: cycle) {
if (!first)
os << " -> ";
// Convert to a build key.
auto key = BuildKey::fromData(rule->key);
switch (key.getKind()) {
case BuildKey::Kind::Unknown:
os << "((unknown))";
break;
case BuildKey::Kind::Command:
os << "command '" << key.getCommandName() << "'";
break;
case BuildKey::Kind::CustomTask:
os << "custom task '" << key.getCustomTaskName() << "'";
break;
case BuildKey::Kind::DirectoryContents:
os << "directory-contents '" << key.getDirectoryPath() << "'";
break;
case BuildKey::Kind::FilteredDirectoryContents:
os << "filtered-directory-contents '"
<< key.getFilteredDirectoryPath() << "'";
break;
case BuildKey::Kind::DirectoryTreeSignature:
os << "directory-tree-signature '"
<< key.getDirectoryTreeSignaturePath() << "'";
break;
case BuildKey::Kind::DirectoryTreeStructureSignature:
os << "directory-tree-structure-signature '"
<< key.getFilteredDirectoryPath() << "'";
break;
case BuildKey::Kind::Node:
os << "node '" << key.getNodeName() << "'";
break;
case BuildKey::Kind::Stat:
os << "stat '" << key.getStatName() << "'";
break;
case BuildKey::Kind::Target:
os << "target '" << key.getTargetName() << "'";
break;
}
first = false;
}
return os.str().str();
}
#pragma mark - BuildSystemFrontendDelegate implementation
namespace {
struct BuildSystemFrontendImpl;
struct BuildSystemFrontendDelegateImpl;
class BuildSystemFrontendExecutionQueueDelegate
: public ExecutionQueueDelegate {
BuildSystemFrontendDelegateImpl& delegateImpl;
bool showVerboseOutput() const;
BuildSystem& getSystem() const;
public:
BuildSystemFrontendExecutionQueueDelegate(
BuildSystemFrontendDelegateImpl& delegateImpl)
: delegateImpl(delegateImpl) { }
virtual void queueJobStarted(JobDescriptor* command) override {
static_cast<BuildSystemFrontendDelegate*>(&getSystem().getDelegate())->
commandJobStarted(reinterpret_cast<Command*>(command));
}
virtual void queueJobFinished(JobDescriptor* command) override {
static_cast<BuildSystemFrontendDelegate*>(&getSystem().getDelegate())->
commandJobFinished(reinterpret_cast<Command*>(command));
}
virtual void processStarted(ProcessContext* command,
ProcessHandle handle,
llbuild_pid_t pid) override {
static_cast<BuildSystemFrontendDelegate*>(&getSystem().getDelegate())->
commandProcessStarted(
reinterpret_cast<Command*>(command),
BuildSystemFrontendDelegate::ProcessHandle { handle.id });
}
virtual void processHadError(ProcessContext* command, ProcessHandle handle,
const Twine& message) override {
static_cast<BuildSystemFrontendDelegate*>(&getSystem().getDelegate())->
commandProcessHadError(
reinterpret_cast<Command*>(command),
BuildSystemFrontendDelegate::ProcessHandle { handle.id },
message);
}
virtual void processHadOutput(ProcessContext* command, ProcessHandle handle,
StringRef data) override {
static_cast<BuildSystemFrontendDelegate*>(&getSystem().getDelegate())->
commandProcessHadOutput(
reinterpret_cast<Command*>(command),
BuildSystemFrontendDelegate::ProcessHandle { handle.id },
data);
}
virtual void processFinished(ProcessContext* command, ProcessHandle handle,
const ProcessResult& result) override {
static_cast<BuildSystemFrontendDelegate*>(&getSystem().getDelegate())->
commandProcessFinished(
reinterpret_cast<Command*>(command),
BuildSystemFrontendDelegate::ProcessHandle { handle.id },
result);
}
};
struct BuildSystemFrontendDelegateImpl {
llvm::SourceMgr& sourceMgr;
StringRef bufferBeingParsed;
std::atomic<unsigned> numErrors{0};
std::atomic<unsigned> numFailedCommands{0};
BuildSystemFrontendExecutionQueueDelegate executionQueueDelegate;
BuildSystemFrontendImpl* frontend = nullptr;
/// The set of active command output buffers, by process handle.
llvm::DenseMap<uintptr_t, std::vector<uint8_t>> processOutputBuffers;
/// The lock protecting `processOutputBuffers`.
std::mutex processOutputBuffersMutex;
public:
BuildSystemFrontendDelegateImpl(llvm::SourceMgr& sourceMgr)
: sourceMgr(sourceMgr), executionQueueDelegate(*this) {}
};
#pragma mark - BuildSystemFrontendImpl
struct BuildSystemFrontendImpl {
BuildSystemFrontendDelegate& delegate;
BuildSystemFrontendDelegateImpl* delegateImpl;
const BuildSystemInvocation& invocation;
std::unique_ptr<basic::FileSystem> fileSystem;
std::unique_ptr<BuildSystem> system;
public:
BuildSystemFrontendImpl(BuildSystemFrontendDelegate& delegate,
BuildSystemFrontendDelegateImpl* delegateImpl,
const BuildSystemInvocation& invocation,
std::unique_ptr<basic::FileSystem> fileSystem)
: delegate(delegate), delegateImpl(delegateImpl), invocation(invocation), fileSystem(std::move(fileSystem)) {
assert(this->fileSystem);
}
private:
/// The status of the delegate.
std::mutex stateMutex;
bool cancelled{false};
public:
void cancel() {
std::lock_guard<std::mutex> lock(stateMutex);
// Update the status to cancelled.
cancelled = true;
if (system) {
system->cancel();
}
}
void resetAfterBuild() {
std::lock_guard<std::mutex> lock(stateMutex);
cancelled = false;
}
bool initialize() {
std::lock_guard<std::mutex> lock(stateMutex);
delegateImpl->numFailedCommands = 0;
delegateImpl->numErrors = 0;
if (cancelled)
return false;
if (system) {
// Already exists, just reset state
system->resetForBuild();
return true;
}
if (!invocation.chdirPath.empty()) {
if (!sys::chdir(invocation.chdirPath.c_str())) {
delegate.error(Twine("unable to honor --chdir: ") + strerror(errno));
return false;
}
}
if (!fileSystem) {
// Catch and report client misuse of a failed build system object
delegate.error(Twine("invalid reuse after initialization failure"));
return false;
}
// Create the build system.
system = std::make_unique<BuildSystem>(delegate, std::move(fileSystem));
// Load the build file.
if (!system->loadDescription(invocation.buildFilePath)) {
system = nullptr;
return false;
}
// Enable tracing, if requested.
if (!invocation.traceFilePath.empty()) {
const auto dir = llvm::sys::path::parent_path(invocation.traceFilePath);
if (!system->getFileSystem().createDirectories(dir) &&
!system->getFileSystem().getFileInfo(dir).isDirectory()) {
delegate.error(Twine("unable to create tracing directory: " + dir));
system = nullptr;
return false;
}
std::string error;
if (!system->enableTracing(invocation.traceFilePath, &error)) {
delegate.error(Twine("unable to enable tracing: ") + error);
system = nullptr;
return false;
}
}
// Attach the database.
if (!invocation.dbPath.empty()) {
// If the database path is relative, always make it relative to the input
// file.
SmallString<256> tmp;
StringRef dbPath = invocation.dbPath;
if (llvm::sys::path::is_relative(invocation.dbPath) &&
dbPath.find("://") == StringRef::npos && !dbPath.startswith(":")) {
llvm::sys::path::append(
tmp, llvm::sys::path::parent_path(invocation.buildFilePath),
invocation.dbPath);
dbPath = tmp.str();
}
std::string error;
if (!system->attachDB(dbPath, &error)) {
delegate.error(Twine("unable to attach DB: ") + error);
system = nullptr;
return false;
}
}
return true;
}
bool buildNode(StringRef nodeToBuild) {
llbuild_defer {
resetAfterBuild();
};
if (!initialize()) {
return false;
}
auto buildValue = system->build(BuildKey::makeNode(nodeToBuild));
if (!buildValue.hasValue()) {
return false;
}
if (!buildValue.getValue().isExistingInput()) {
if (buildValue.getValue().isMissingInput()) {
delegate.error((Twine("missing input '") + nodeToBuild + "' and no rule to build it"));
}
return false;
}
return delegate.getNumFailedCommands() == 0 && delegate.getNumErrors() == 0;
}
bool build(StringRef targetToBuild) {
llbuild_defer {
resetAfterBuild();
};
if (!initialize()) {
return false;
}
// Build the target; if something unspecified failed about the build, return
// an error.
if (!system->build(targetToBuild))
return false;
// The build was successful if there were no failed commands or unspecified
// errors, including cancellation. We explicitly include cancellation because
// it is possible for a build to complete with no failed commands or errors,
// yet not have done any actual work (i.e. if we are cancelled immediately).
//
// It is the job of the client to report a summary, if desired.
std::lock_guard<std::mutex> lock(stateMutex);
return !cancelled && delegate.getNumFailedCommands() == 0
&& delegate.getNumErrors() == 0;
}
};
bool BuildSystemFrontendExecutionQueueDelegate::showVerboseOutput() const {
return delegateImpl.frontend->invocation.showVerboseStatus;
}
BuildSystem& BuildSystemFrontendExecutionQueueDelegate::getSystem() const {
assert(delegateImpl.frontend->system);
return *delegateImpl.frontend->system;
}
}
BuildSystemFrontendDelegate::
BuildSystemFrontendDelegate(llvm::SourceMgr& sourceMgr,
StringRef name,
uint32_t version)
: BuildSystemDelegate(name, version),
impl(new BuildSystemFrontendDelegateImpl(sourceMgr))
{
}
BuildSystemFrontendDelegate::~BuildSystemFrontendDelegate() {
delete static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
}
void
BuildSystemFrontendDelegate::setFileContentsBeingParsed(StringRef buffer) {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
impl->bufferBeingParsed = buffer;
}
llvm::SourceMgr& BuildSystemFrontendDelegate::getSourceMgr() {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
return impl->sourceMgr;
}
unsigned BuildSystemFrontendDelegate::getNumErrors() {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
return impl->numErrors;
}
unsigned BuildSystemFrontendDelegate::getNumFailedCommands() {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
return impl->numFailedCommands;
}
void
BuildSystemFrontendDelegate::error(const Twine& message) {
error("", {}, message.str());
}
void
BuildSystemFrontendDelegate::error(StringRef filename,
const Token& at,
const Twine& message) {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
++impl->numErrors;
// If we have a file and token, resolve the location and range to one
// accessible by the source manager.
//
// FIXME: We shouldn't need to do this, but should switch llbuild to using
// SourceMgr natively.
llvm::SMLoc loc{};
llvm::SMRange range{};
if (!filename.empty() && at.start) {
// FIXME: We ignore errors here, for now, this will be resolved when we move
// to SourceMgr completely.
auto buffer = impl->frontend->system->getFileSystem().getFileContents(filename);
if (buffer) {
unsigned offset = at.start - impl->bufferBeingParsed.data();
if (offset + at.length < buffer->getBufferSize()) {
range.Start = loc = llvm::SMLoc::getFromPointer(
buffer->getBufferStart() + offset);
range.End = llvm::SMLoc::getFromPointer(
buffer->getBufferStart() + (offset + at.length));
getSourceMgr().AddNewSourceBuffer(std::move(buffer), llvm::SMLoc{});
}
}
}
if (range.Start.isValid()) {
getSourceMgr().PrintMessage(loc, llvm::SourceMgr::DK_Error, message, range);
} else {
getSourceMgr().PrintMessage(loc, llvm::SourceMgr::DK_Error, message);
}
fflush(stderr);
}
std::unique_ptr<ExecutionQueue>
BuildSystemFrontendDelegate::createExecutionQueue() {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
auto invocation = impl->frontend->invocation;
QualityOfService qos = invocation.qos.hasValue() ?
invocation.qos.getValue() : getDefaultQualityOfService();
if (invocation.useSerialBuild) {
return std::unique_ptr<ExecutionQueue>(
createLaneBasedExecutionQueue(impl->executionQueueDelegate, 1,
invocation.schedulerAlgorithm, qos,
invocation.environment));
}
// Get the number of CPUs to use.
unsigned numLanes = invocation.schedulerLanes;
if (numLanes == 0) {
unsigned numCPUs = std::thread::hardware_concurrency();
if (numCPUs == 0) {
error("<unknown>", {}, "unable to detect number of CPUs");
numLanes = 1;
} else {
numLanes = numCPUs;
}
}
return std::unique_ptr<ExecutionQueue>(
createLaneBasedExecutionQueue(impl->executionQueueDelegate, numLanes,
invocation.schedulerAlgorithm, qos,
invocation.environment));
}
void BuildSystemFrontendDelegate::cancel() {
auto delegateImpl = static_cast<BuildSystemFrontendDelegateImpl*>(impl);
delegateImpl->frontend->cancel();
}
void BuildSystemFrontendDelegate::hadCommandFailure() {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
// Increment the failed command count.
++impl->numFailedCommands;
}
void BuildSystemFrontendDelegate::commandStatusChanged(Command*,
CommandStatusKind) {
}
void BuildSystemFrontendDelegate::commandPreparing(Command*) {
}
bool BuildSystemFrontendDelegate::shouldCommandStart(Command*) {
return true;
}
void BuildSystemFrontendDelegate::commandStarted(Command* command) {
// Don't report status if opted out by the command.
if (!command->shouldShowStatus()) {
return;
}
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
// Log the command.
//
// FIXME: Design the logging and status output APIs.
SmallString<64> description;
if (impl->frontend->invocation.showVerboseStatus) {
command->getVerboseDescription(description);
} else {
command->getShortDescription(description);
// If the short description is empty, always show the verbose one.
if (description.empty()) {
command->getVerboseDescription(description);
}
}
fprintf(stdout, "%s\n", description.c_str());
fflush(stdout);
}
void BuildSystemFrontendDelegate::commandHadError(Command* command, StringRef data) {
fwrite(data.data(), data.size(), 1, stderr);
fflush(stderr);
}
void BuildSystemFrontendDelegate::commandHadNote(Command* command, StringRef data) {
fwrite(data.data(), data.size(), 1, stdout);
fflush(stdout);
}
void BuildSystemFrontendDelegate::commandHadWarning(Command* command, StringRef data) {
fwrite(data.data(), data.size(), 1, stdout);
fflush(stdout);
}
void BuildSystemFrontendDelegate::commandFinished(Command*, ProcessStatus) {
}
void BuildSystemFrontendDelegate::commandFoundDiscoveredDependency(Command*, StringRef, DiscoveredDependencyKind) {
}
void BuildSystemFrontendDelegate::commandCannotBuildOutputDueToMissingInputs(
Command * command, Node *output, SmallPtrSet<Node *, 1> inputs) {
std::string message;
llvm::raw_string_ostream messageStream(message);
messageStream << "cannot build '";
messageStream << output->getName().str();
messageStream << "' due to missing inputs: ";
for (Node* input : inputs) {
if (input != *inputs.begin()) {
messageStream << ", ";
}
messageStream << "'" << input->getName() << "'";
}
messageStream.flush();
fwrite(message.data(), message.size(), 1, stderr);
fflush(stderr);
}
Command* BuildSystemFrontendDelegate::chooseCommandFromMultipleProducers(
Node *output, std::vector<Command*> commands) {
return nullptr;
}
void BuildSystemFrontendDelegate::cannotBuildNodeDueToMultipleProducers(
Node *output, std::vector<Command*> commands) {
std::string message;
llvm::raw_string_ostream messageStream(message);
messageStream << "unable to build node: '";
messageStream << output->getName();
messageStream << "' (node is produced by multiple commands: '";
for (Command* cmd : commands) {
if (cmd != *commands.begin()) {
messageStream << ", ";
}
messageStream << "'" << cmd->getName() << "'";
}
messageStream.flush();
fwrite(message.data(), message.size(), 1, stderr);
fflush(stderr);
}
void BuildSystemFrontendDelegate::commandJobStarted(Command*) {
}
void BuildSystemFrontendDelegate::commandJobFinished(Command*) {
}
void BuildSystemFrontendDelegate::commandProcessStarted(Command*,
ProcessHandle) {
}
void BuildSystemFrontendDelegate::determinedRuleNeedsToRun(core::Rule* ruleNeedingToRun, core::Rule::RunReason reason, core::Rule* inputRule) {}
bool BuildSystemFrontendDelegate::
shouldResolveCycle(const std::vector<core::Rule*>& items,
core::Rule* candidateRule,
core::Rule::CycleAction action) {
return false;
}
void BuildSystemFrontendDelegate::
commandProcessHadError(Command* command, ProcessHandle handle,
const Twine& message) {
SmallString<256> buffer;
auto str = message.toStringRef(buffer);
// FIXME: Design the logging and status output APIs.
fwrite(str.data(), str.size(), 1, stderr);
fputc('\n', stderr);
fflush(stderr);
}
void BuildSystemFrontendDelegate::
commandProcessHadOutput(Command* command, ProcessHandle handle,
StringRef data) {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
std::unique_lock<std::mutex> lock(impl->processOutputBuffersMutex);
// Append to the output buffer.
auto& buffer = impl->processOutputBuffers[handle.id];
buffer.insert(buffer.end(), data.begin(), data.end());
}
void BuildSystemFrontendDelegate::
commandProcessFinished(Command*, ProcessHandle handle,
const ProcessResult& result) {
auto impl = static_cast<BuildSystemFrontendDelegateImpl*>(this->impl);
std::unique_lock<std::mutex> lock(impl->processOutputBuffersMutex);
// If there was an output buffer, flush it.
auto it = impl->processOutputBuffers.find(handle.id);
if (it == impl->processOutputBuffers.end())
return;
fwrite(it->second.data(), it->second.size(), 1, stdout);
fflush(stdout);
impl->processOutputBuffers.erase(it);
}
#pragma mark - BuildSystemFrontend
BuildSystemFrontend::
BuildSystemFrontend(BuildSystemFrontendDelegate& delegate,
const BuildSystemInvocation& invocation,
std::unique_ptr<basic::FileSystem> fileSystem)
: impl(new BuildSystemFrontendImpl(delegate,
static_cast<BuildSystemFrontendDelegateImpl*>(delegate.impl),
invocation,
std::move(fileSystem)))
{
auto implPtr = static_cast<BuildSystemFrontendImpl*>(impl);
implPtr->delegateImpl->frontend = implPtr;
}
BuildSystemFrontend::~BuildSystemFrontend() {
delete static_cast<BuildSystemFrontendImpl*>(impl);
impl = nullptr;
}
bool BuildSystemFrontend::initialize() {
return static_cast<BuildSystemFrontendImpl*>(impl)->initialize();
}
bool BuildSystemFrontend::build(StringRef targetToBuild) {
return static_cast<BuildSystemFrontendImpl*>(impl)->build(targetToBuild);
}
bool BuildSystemFrontend::buildNode(StringRef nodeToBuild) {
return static_cast<BuildSystemFrontendImpl*>(impl)->buildNode(nodeToBuild);
}
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