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//===--- ArgsToFrontendInputsConverter.cpp --------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "ArgsToFrontendInputsConverter.h"
#include "ArgsToFrontendOutputsConverter.h"
#include "swift/AST/DiagnosticsFrontend.h"
#include "swift/Basic/Defer.h"
#include "swift/Frontend/FrontendOptions.h"
#include "swift/Option/Options.h"
#include "swift/Parse/Lexer.h"
#include "swift/Strings.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/LineIterator.h"
#include "llvm/Support/Path.h"
using namespace swift;
using namespace llvm::opt;
ArgsToFrontendInputsConverter::ArgsToFrontendInputsConverter(
DiagnosticEngine &diags, const ArgList &args)
: Diags(diags), Args(args),
FilelistPathArg(args.getLastArg(options::OPT_filelist)),
PrimaryFilelistPathArg(args.getLastArg(options::OPT_primary_filelist)),
BadFileDescriptorRetryCountArg(
args.getLastArg(options::OPT_bad_file_descriptor_retry_count)) {}
std::optional<FrontendInputsAndOutputs> ArgsToFrontendInputsConverter::convert(
SmallVectorImpl<std::unique_ptr<llvm::MemoryBuffer>> *buffers) {
SWIFT_DEFER {
if (buffers) {
std::move(ConfigurationFileBuffers.begin(),
ConfigurationFileBuffers.end(),
std::back_inserter(*buffers));
// Clearing the original list of buffers isn't strictly necessary, but
// makes the behavior more sensible if we were to call convert() again.
ConfigurationFileBuffers.clear();
}
};
if (enforceFilelistExclusion())
return std::nullopt;
if (FilelistPathArg ? readInputFilesFromFilelist()
: readInputFilesFromCommandLine())
return std::nullopt;
std::optional<std::set<StringRef>> primaryFiles = readPrimaryFiles();
if (!primaryFiles)
return std::nullopt;
FrontendInputsAndOutputs result;
std::set<StringRef> unusedPrimaryFiles;
std::tie(result, unusedPrimaryFiles) =
createInputFilesConsumingPrimaries(*primaryFiles);
if (diagnoseUnusedPrimaryFiles(unusedPrimaryFiles))
return std::nullopt;
// Must be set before iterating over inputs needing outputs.
result.setBypassBatchModeChecks(
Args.hasArg(options::OPT_bypass_batch_mode_checks));
return std::move(result);
}
bool ArgsToFrontendInputsConverter::enforceFilelistExclusion() {
if (Args.hasArg(options::OPT_INPUT) && FilelistPathArg) {
Diags.diagnose(SourceLoc(),
diag::error_cannot_have_input_files_with_file_list);
return true;
}
// The following is not strictly necessary, but the restriction makes
// it easier to understand a given command line:
if (Args.hasArg(options::OPT_primary_file) && PrimaryFilelistPathArg) {
Diags.diagnose(
SourceLoc(),
diag::error_cannot_have_primary_files_with_primary_file_list);
return true;
}
return false;
}
bool ArgsToFrontendInputsConverter::readInputFilesFromCommandLine() {
bool hadDuplicates = false;
for (const Arg *A :
Args.filtered(options::OPT_INPUT, options::OPT_primary_file)) {
hadDuplicates = addFile(A->getValue()) || hadDuplicates;
}
return false; // FIXME: Don't bail out for duplicates, too many tests depend
// on it.
}
bool ArgsToFrontendInputsConverter::readInputFilesFromFilelist() {
bool hadDuplicates = false;
bool hadError =
forAllFilesInFilelist(FilelistPathArg, [&](StringRef file) -> void {
hadDuplicates = addFile(file) || hadDuplicates;
});
if (hadError)
return true;
return false; // FIXME: Don't bail out for duplicates, too many tests depend
// on it.
}
bool ArgsToFrontendInputsConverter::forAllFilesInFilelist(
Arg const *const pathArg, llvm::function_ref<void(StringRef)> fn) {
if (!pathArg)
return false;
StringRef path = pathArg->getValue();
// Honor -bad-file-descriptor-retry-count from the argument list
unsigned RetryCount = 0;
if (BadFileDescriptorRetryCountArg &&
StringRef(BadFileDescriptorRetryCountArg->getValue())
.getAsInteger(10,RetryCount)) {
Diags.diagnose(SourceLoc(), diag::error_invalid_arg_value,
BadFileDescriptorRetryCountArg->getAsString(Args),
BadFileDescriptorRetryCountArg->getValue());
return true;
}
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> filelistBufferOrError = nullptr;
for (unsigned I = 0; I < RetryCount + 1; ++I) {
filelistBufferOrError = llvm::MemoryBuffer::getFile(path);
if (filelistBufferOrError)
break;
if (filelistBufferOrError.getError().value() != EBADF)
break;
}
if (!filelistBufferOrError) {
Diags.diagnose(SourceLoc(), diag::cannot_open_file, path,
filelistBufferOrError.getError().message());
return true;
}
for (auto file :
llvm::make_range(llvm::line_iterator(*filelistBufferOrError->get()),
llvm::line_iterator()))
fn(file);
ConfigurationFileBuffers.push_back(std::move(*filelistBufferOrError));
return false;
}
bool ArgsToFrontendInputsConverter::addFile(StringRef file) {
if (Files.insert(file))
return false;
Diags.diagnose(SourceLoc(), diag::error_duplicate_input_file, file);
return true;
}
std::optional<std::set<StringRef>>
ArgsToFrontendInputsConverter::readPrimaryFiles() {
std::set<StringRef> primaryFiles;
for (const Arg *A : Args.filtered(options::OPT_primary_file))
primaryFiles.insert(A->getValue());
if (forAllFilesInFilelist(
PrimaryFilelistPathArg,
[&](StringRef file) -> void { primaryFiles.insert(file); }))
return std::nullopt;
return primaryFiles;
}
std::pair<FrontendInputsAndOutputs, std::set<StringRef>>
ArgsToFrontendInputsConverter::createInputFilesConsumingPrimaries(
std::set<StringRef> primaryFiles) {
bool hasAnyPrimaryFiles = !primaryFiles.empty();
FrontendInputsAndOutputs result;
for (auto &file : Files) {
bool isPrimary = primaryFiles.count(file) > 0;
result.addInput(InputFile(file, isPrimary));
if (isPrimary)
primaryFiles.erase(file);
}
if (!Files.empty() && !hasAnyPrimaryFiles) {
std::optional<std::vector<std::string>> userSuppliedNamesOrErr =
OutputFilesComputer::getOutputFilenamesFromCommandLineOrFilelist(
Args, Diags, options::OPT_o, options::OPT_output_filelist);
if (userSuppliedNamesOrErr && userSuppliedNamesOrErr->size() == 1)
result.setIsSingleThreadedWMO(true);
}
return {std::move(result), std::move(primaryFiles)};
}
bool ArgsToFrontendInputsConverter::diagnoseUnusedPrimaryFiles(
std::set<StringRef> primaryFiles) {
for (auto &file : primaryFiles) {
// Catch "swiftc -frontend -c -filelist foo -primary-file
// some-file-not-in-foo".
assert(FilelistPathArg && "Unused primary with no filelist");
Diags.diagnose(SourceLoc(), diag::error_primary_file_not_found, file,
FilelistPathArg->getValue());
}
return !primaryFiles.empty();
}
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