forked from OSchip/llvm-project
258 lines
8.1 KiB
C++
258 lines
8.1 KiB
C++
//===--- FileRemapper.cpp - File Remapping Helper -------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/ARCMigrate/FileRemapper.h"
|
|
#include "clang/Basic/Diagnostic.h"
|
|
#include "clang/Basic/FileManager.h"
|
|
#include "clang/Lex/PreprocessorOptions.h"
|
|
#include "llvm/Support/FileSystem.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/Path.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <fstream>
|
|
|
|
using namespace clang;
|
|
using namespace arcmt;
|
|
|
|
FileRemapper::FileRemapper() {
|
|
FileMgr.reset(new FileManager(FileSystemOptions()));
|
|
}
|
|
|
|
FileRemapper::~FileRemapper() {
|
|
clear();
|
|
}
|
|
|
|
void FileRemapper::clear(StringRef outputDir) {
|
|
for (MappingsTy::iterator
|
|
I = FromToMappings.begin(), E = FromToMappings.end(); I != E; ++I)
|
|
resetTarget(I->second);
|
|
FromToMappings.clear();
|
|
assert(ToFromMappings.empty());
|
|
if (!outputDir.empty()) {
|
|
std::string infoFile = getRemapInfoFile(outputDir);
|
|
llvm::sys::fs::remove(infoFile);
|
|
}
|
|
}
|
|
|
|
std::string FileRemapper::getRemapInfoFile(StringRef outputDir) {
|
|
assert(!outputDir.empty());
|
|
SmallString<128> InfoFile = outputDir;
|
|
llvm::sys::path::append(InfoFile, "remap");
|
|
return InfoFile.str();
|
|
}
|
|
|
|
bool FileRemapper::initFromDisk(StringRef outputDir, DiagnosticsEngine &Diag,
|
|
bool ignoreIfFilesChanged) {
|
|
std::string infoFile = getRemapInfoFile(outputDir);
|
|
return initFromFile(infoFile, Diag, ignoreIfFilesChanged);
|
|
}
|
|
|
|
bool FileRemapper::initFromFile(StringRef filePath, DiagnosticsEngine &Diag,
|
|
bool ignoreIfFilesChanged) {
|
|
assert(FromToMappings.empty() &&
|
|
"initFromDisk should be called before any remap calls");
|
|
std::string infoFile = filePath;
|
|
if (!llvm::sys::fs::exists(infoFile))
|
|
return false;
|
|
|
|
std::vector<std::pair<const FileEntry *, const FileEntry *> > pairs;
|
|
|
|
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> fileBuf =
|
|
llvm::MemoryBuffer::getFile(infoFile.c_str());
|
|
if (!fileBuf)
|
|
return report("Error opening file: " + infoFile, Diag);
|
|
|
|
SmallVector<StringRef, 64> lines;
|
|
fileBuf.get()->getBuffer().split(lines, "\n");
|
|
|
|
for (unsigned idx = 0; idx+3 <= lines.size(); idx += 3) {
|
|
StringRef fromFilename = lines[idx];
|
|
unsigned long long timeModified;
|
|
if (lines[idx+1].getAsInteger(10, timeModified))
|
|
return report("Invalid file data: '" + lines[idx+1] + "' not a number",
|
|
Diag);
|
|
StringRef toFilename = lines[idx+2];
|
|
|
|
const FileEntry *origFE = FileMgr->getFile(fromFilename);
|
|
if (!origFE) {
|
|
if (ignoreIfFilesChanged)
|
|
continue;
|
|
return report("File does not exist: " + fromFilename, Diag);
|
|
}
|
|
const FileEntry *newFE = FileMgr->getFile(toFilename);
|
|
if (!newFE) {
|
|
if (ignoreIfFilesChanged)
|
|
continue;
|
|
return report("File does not exist: " + toFilename, Diag);
|
|
}
|
|
|
|
if ((uint64_t)origFE->getModificationTime() != timeModified) {
|
|
if (ignoreIfFilesChanged)
|
|
continue;
|
|
return report("File was modified: " + fromFilename, Diag);
|
|
}
|
|
|
|
pairs.push_back(std::make_pair(origFE, newFE));
|
|
}
|
|
|
|
for (unsigned i = 0, e = pairs.size(); i != e; ++i)
|
|
remap(pairs[i].first, pairs[i].second);
|
|
|
|
return false;
|
|
}
|
|
|
|
bool FileRemapper::flushToDisk(StringRef outputDir, DiagnosticsEngine &Diag) {
|
|
using namespace llvm::sys;
|
|
|
|
if (fs::create_directory(outputDir))
|
|
return report("Could not create directory: " + outputDir, Diag);
|
|
|
|
std::string infoFile = getRemapInfoFile(outputDir);
|
|
return flushToFile(infoFile, Diag);
|
|
}
|
|
|
|
bool FileRemapper::flushToFile(StringRef outputPath, DiagnosticsEngine &Diag) {
|
|
using namespace llvm::sys;
|
|
|
|
std::error_code EC;
|
|
std::string infoFile = outputPath;
|
|
llvm::raw_fd_ostream infoOut(infoFile, EC, llvm::sys::fs::F_None);
|
|
if (EC)
|
|
return report(EC.message(), Diag);
|
|
|
|
for (MappingsTy::iterator
|
|
I = FromToMappings.begin(), E = FromToMappings.end(); I != E; ++I) {
|
|
|
|
const FileEntry *origFE = I->first;
|
|
SmallString<200> origPath = StringRef(origFE->getName());
|
|
fs::make_absolute(origPath);
|
|
infoOut << origPath << '\n';
|
|
infoOut << (uint64_t)origFE->getModificationTime() << '\n';
|
|
|
|
if (const FileEntry *FE = I->second.dyn_cast<const FileEntry *>()) {
|
|
SmallString<200> newPath = StringRef(FE->getName());
|
|
fs::make_absolute(newPath);
|
|
infoOut << newPath << '\n';
|
|
} else {
|
|
|
|
SmallString<64> tempPath;
|
|
int fd;
|
|
if (fs::createTemporaryFile(path::filename(origFE->getName()),
|
|
path::extension(origFE->getName()).drop_front(), fd,
|
|
tempPath))
|
|
return report("Could not create file: " + tempPath.str(), Diag);
|
|
|
|
llvm::raw_fd_ostream newOut(fd, /*shouldClose=*/true);
|
|
llvm::MemoryBuffer *mem = I->second.get<llvm::MemoryBuffer *>();
|
|
newOut.write(mem->getBufferStart(), mem->getBufferSize());
|
|
newOut.close();
|
|
|
|
const FileEntry *newE = FileMgr->getFile(tempPath);
|
|
remap(origFE, newE);
|
|
infoOut << newE->getName() << '\n';
|
|
}
|
|
}
|
|
|
|
infoOut.close();
|
|
return false;
|
|
}
|
|
|
|
bool FileRemapper::overwriteOriginal(DiagnosticsEngine &Diag,
|
|
StringRef outputDir) {
|
|
using namespace llvm::sys;
|
|
|
|
for (MappingsTy::iterator
|
|
I = FromToMappings.begin(), E = FromToMappings.end(); I != E; ++I) {
|
|
const FileEntry *origFE = I->first;
|
|
assert(I->second.is<llvm::MemoryBuffer *>());
|
|
if (!fs::exists(origFE->getName()))
|
|
return report(StringRef("File does not exist: ") + origFE->getName(),
|
|
Diag);
|
|
|
|
std::error_code EC;
|
|
llvm::raw_fd_ostream Out(origFE->getName(), EC, llvm::sys::fs::F_None);
|
|
if (EC)
|
|
return report(EC.message(), Diag);
|
|
|
|
llvm::MemoryBuffer *mem = I->second.get<llvm::MemoryBuffer *>();
|
|
Out.write(mem->getBufferStart(), mem->getBufferSize());
|
|
Out.close();
|
|
}
|
|
|
|
clear(outputDir);
|
|
return false;
|
|
}
|
|
|
|
void FileRemapper::applyMappings(PreprocessorOptions &PPOpts) const {
|
|
for (MappingsTy::const_iterator
|
|
I = FromToMappings.begin(), E = FromToMappings.end(); I != E; ++I) {
|
|
if (const FileEntry *FE = I->second.dyn_cast<const FileEntry *>()) {
|
|
PPOpts.addRemappedFile(I->first->getName(), FE->getName());
|
|
} else {
|
|
llvm::MemoryBuffer *mem = I->second.get<llvm::MemoryBuffer *>();
|
|
PPOpts.addRemappedFile(I->first->getName(), mem);
|
|
}
|
|
}
|
|
|
|
PPOpts.RetainRemappedFileBuffers = true;
|
|
}
|
|
|
|
void FileRemapper::remap(StringRef filePath,
|
|
std::unique_ptr<llvm::MemoryBuffer> memBuf) {
|
|
remap(getOriginalFile(filePath), std::move(memBuf));
|
|
}
|
|
|
|
void FileRemapper::remap(const FileEntry *file,
|
|
std::unique_ptr<llvm::MemoryBuffer> memBuf) {
|
|
assert(file);
|
|
Target &targ = FromToMappings[file];
|
|
resetTarget(targ);
|
|
targ = memBuf.release();
|
|
}
|
|
|
|
void FileRemapper::remap(const FileEntry *file, const FileEntry *newfile) {
|
|
assert(file && newfile);
|
|
Target &targ = FromToMappings[file];
|
|
resetTarget(targ);
|
|
targ = newfile;
|
|
ToFromMappings[newfile] = file;
|
|
}
|
|
|
|
const FileEntry *FileRemapper::getOriginalFile(StringRef filePath) {
|
|
const FileEntry *file = FileMgr->getFile(filePath);
|
|
// If we are updating a file that overriden an original file,
|
|
// actually update the original file.
|
|
llvm::DenseMap<const FileEntry *, const FileEntry *>::iterator
|
|
I = ToFromMappings.find(file);
|
|
if (I != ToFromMappings.end()) {
|
|
file = I->second;
|
|
assert(FromToMappings.find(file) != FromToMappings.end() &&
|
|
"Original file not in mappings!");
|
|
}
|
|
return file;
|
|
}
|
|
|
|
void FileRemapper::resetTarget(Target &targ) {
|
|
if (!targ)
|
|
return;
|
|
|
|
if (llvm::MemoryBuffer *oldmem = targ.dyn_cast<llvm::MemoryBuffer *>()) {
|
|
delete oldmem;
|
|
} else {
|
|
const FileEntry *toFE = targ.get<const FileEntry *>();
|
|
ToFromMappings.erase(toFE);
|
|
}
|
|
}
|
|
|
|
bool FileRemapper::report(const Twine &err, DiagnosticsEngine &Diag) {
|
|
Diag.Report(Diag.getCustomDiagID(DiagnosticsEngine::Error, "%0"))
|
|
<< err.str();
|
|
return true;
|
|
}
|