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//===- DependencyScanningTool.cpp - clang-scan-deps service ---------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Tooling/DependencyScanning/DependencyScanningTool.h"
#include "clang/Frontend/Utils.h"
using namespace clang;
using namespace tooling;
using namespace dependencies;
std::vector<std::string> FullDependencies::getCommandLine(
llvm::function_ref<std::string(const ModuleID &, ModuleOutputKind)>
LookupModuleOutput) const {
std::vector<std::string> Ret = getCommandLineWithoutModulePaths();
for (ModuleID MID : ClangModuleDeps) {
auto PCM = LookupModuleOutput(MID, ModuleOutputKind::ModuleFile);
Ret.push_back("-fmodule-file=" + PCM);
}
return Ret;
}
std::vector<std::string>
FullDependencies::getCommandLineWithoutModulePaths() const {
std::vector<std::string> Args = OriginalCommandLine;
Args.push_back("-fno-implicit-modules");
Args.push_back("-fno-implicit-module-maps");
for (const PrebuiltModuleDep &PMD : PrebuiltModuleDeps)
Args.push_back("-fmodule-file=" + PMD.PCMFile);
// These arguments are unused in explicit compiles.
llvm::erase_if(Args, [](StringRef Arg) {
if (Arg.consume_front("-fmodules-")) {
return Arg.startswith("cache-path=") ||
Arg.startswith("prune-interval=") ||
Arg.startswith("prune-after=") ||
Arg == "validate-once-per-build-session";
}
return Arg.startswith("-fbuild-session-file=");
});
return Args;
}
DependencyScanningTool::DependencyScanningTool(
DependencyScanningService &Service,
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> FS)
: Worker(Service, std::move(FS)) {}
llvm::Expected<std::string> DependencyScanningTool::getDependencyFile(
const std::vector<std::string> &CommandLine, StringRef CWD,
llvm::Optional<StringRef> ModuleName) {
/// Prints out all of the gathered dependencies into a string.
class MakeDependencyPrinterConsumer : public DependencyConsumer {
public:
void
handleDependencyOutputOpts(const DependencyOutputOptions &Opts) override {
this->Opts = std::make_unique<DependencyOutputOptions>(Opts);
}
void handleFileDependency(StringRef File) override {
Dependencies.push_back(std::string(File));
}
void handlePrebuiltModuleDependency(PrebuiltModuleDep PMD) override {
// Same as `handleModuleDependency`.
}
void handleModuleDependency(ModuleDeps MD) override {
// These are ignored for the make format as it can't support the full
// set of deps, and handleFileDependency handles enough for implicitly
// built modules to work.
}
void handleContextHash(std::string Hash) override {}
void printDependencies(std::string &S) {
assert(Opts && "Handled dependency output options.");
class DependencyPrinter : public DependencyFileGenerator {
public:
DependencyPrinter(DependencyOutputOptions &Opts,
ArrayRef<std::string> Dependencies)
: DependencyFileGenerator(Opts) {
for (const auto &Dep : Dependencies)
addDependency(Dep);
}
void printDependencies(std::string &S) {
llvm::raw_string_ostream OS(S);
outputDependencyFile(OS);
}
};
DependencyPrinter Generator(*Opts, Dependencies);
Generator.printDependencies(S);
}
private:
std::unique_ptr<DependencyOutputOptions> Opts;
std::vector<std::string> Dependencies;
};
MakeDependencyPrinterConsumer Consumer;
auto Result =
Worker.computeDependencies(CWD, CommandLine, Consumer, ModuleName);
if (Result)
return std::move(Result);
std::string Output;
Consumer.printDependencies(Output);
return Output;
}
llvm::Expected<FullDependenciesResult>
DependencyScanningTool::getFullDependencies(
const std::vector<std::string> &CommandLine, StringRef CWD,
const llvm::StringSet<> &AlreadySeen,
llvm::Optional<StringRef> ModuleName) {
class FullDependencyPrinterConsumer : public DependencyConsumer {
public:
FullDependencyPrinterConsumer(const llvm::StringSet<> &AlreadySeen)
: AlreadySeen(AlreadySeen) {}
void
handleDependencyOutputOpts(const DependencyOutputOptions &Opts) override {}
void handleFileDependency(StringRef File) override {
Dependencies.push_back(std::string(File));
}
void handlePrebuiltModuleDependency(PrebuiltModuleDep PMD) override {
PrebuiltModuleDeps.emplace_back(std::move(PMD));
}
void handleModuleDependency(ModuleDeps MD) override {
ClangModuleDeps[MD.ID.ContextHash + MD.ID.ModuleName] = std::move(MD);
}
void handleContextHash(std::string Hash) override {
ContextHash = std::move(Hash);
}
FullDependenciesResult getFullDependencies(
const std::vector<std::string> &OriginalCommandLine) const {
FullDependencies FD;
FD.OriginalCommandLine =
ArrayRef<std::string>(OriginalCommandLine).slice(1);
FD.ID.ContextHash = std::move(ContextHash);
FD.FileDeps.assign(Dependencies.begin(), Dependencies.end());
for (auto &&M : ClangModuleDeps) {
auto &MD = M.second;
if (MD.ImportedByMainFile)
FD.ClangModuleDeps.push_back(MD.ID);
}
FD.PrebuiltModuleDeps = std::move(PrebuiltModuleDeps);
FullDependenciesResult FDR;
for (auto &&M : ClangModuleDeps) {
// TODO: Avoid handleModuleDependency even being called for modules
// we've already seen.
if (AlreadySeen.count(M.first))
continue;
FDR.DiscoveredModules.push_back(std::move(M.second));
}
FDR.FullDeps = std::move(FD);
return FDR;
}
private:
std::vector<std::string> Dependencies;
std::vector<PrebuiltModuleDep> PrebuiltModuleDeps;
llvm::MapVector<std::string, ModuleDeps, llvm::StringMap<unsigned>> ClangModuleDeps;
std::string ContextHash;
std::vector<std::string> OutputPaths;
const llvm::StringSet<> &AlreadySeen;
};
FullDependencyPrinterConsumer Consumer(AlreadySeen);
llvm::Error Result =
Worker.computeDependencies(CWD, CommandLine, Consumer, ModuleName);
if (Result)
return std::move(Result);
return Consumer.getFullDependencies(CommandLine);
}
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