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-rw-r--r--lib/Basic/VirtualFileSystem.cpp363
1 files changed, 302 insertions, 61 deletions
diff --git a/lib/Basic/VirtualFileSystem.cpp b/lib/Basic/VirtualFileSystem.cpp
index 6977f400287fa..8ace2b3dc8381 100644
--- a/lib/Basic/VirtualFileSystem.cpp
+++ b/lib/Basic/VirtualFileSystem.cpp
@@ -16,13 +16,16 @@
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/iterator_range.h"
+#include "llvm/Config/llvm-config.h"
+#include "llvm/Support/Debug.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
+#include "llvm/Support/Process.h"
#include "llvm/Support/YAMLParser.h"
-#include "llvm/Config/llvm-config.h"
#include <atomic>
#include <memory>
+#include <utility>
// For chdir.
#ifdef LLVM_ON_WIN32
@@ -99,6 +102,9 @@ FileSystem::getBufferForFile(const llvm::Twine &Name, int64_t FileSize,
}
std::error_code FileSystem::makeAbsolute(SmallVectorImpl<char> &Path) const {
+ if (llvm::sys::path::is_absolute(Path))
+ return std::error_code();
+
auto WorkingDir = getCurrentWorkingDirectory();
if (!WorkingDir)
return WorkingDir.getError();
@@ -111,6 +117,20 @@ bool FileSystem::exists(const Twine &Path) {
return Status && Status->exists();
}
+#ifndef NDEBUG
+static bool isTraversalComponent(StringRef Component) {
+ return Component.equals("..") || Component.equals(".");
+}
+
+static bool pathHasTraversal(StringRef Path) {
+ using namespace llvm::sys;
+ for (StringRef Comp : llvm::make_range(path::begin(Path), path::end(Path)))
+ if (isTraversalComponent(Comp))
+ return true;
+ return false;
+}
+#endif
+
//===-----------------------------------------------------------------------===/
// RealFileSystem implementation
//===-----------------------------------------------------------------------===/
@@ -120,16 +140,19 @@ namespace {
class RealFile : public File {
int FD;
Status S;
+ std::string RealName;
friend class RealFileSystem;
- RealFile(int FD, StringRef NewName)
+ RealFile(int FD, StringRef NewName, StringRef NewRealPathName)
: FD(FD), S(NewName, {}, {}, {}, {}, {},
- llvm::sys::fs::file_type::status_error, {}) {
+ llvm::sys::fs::file_type::status_error, {}),
+ RealName(NewRealPathName.str()) {
assert(FD >= 0 && "Invalid or inactive file descriptor");
}
public:
~RealFile() override;
ErrorOr<Status> status() override;
+ ErrorOr<std::string> getName() override;
ErrorOr<std::unique_ptr<MemoryBuffer>> getBuffer(const Twine &Name,
int64_t FileSize,
bool RequiresNullTerminator,
@@ -150,6 +173,10 @@ ErrorOr<Status> RealFile::status() {
return S;
}
+ErrorOr<std::string> RealFile::getName() {
+ return RealName.empty() ? S.getName().str() : RealName;
+}
+
ErrorOr<std::unique_ptr<MemoryBuffer>>
RealFile::getBuffer(const Twine &Name, int64_t FileSize,
bool RequiresNullTerminator, bool IsVolatile) {
@@ -158,21 +185,10 @@ RealFile::getBuffer(const Twine &Name, int64_t FileSize,
IsVolatile);
}
-// FIXME: This is terrible, we need this for ::close.
-#if !defined(_MSC_VER) && !defined(__MINGW32__)
-#include <unistd.h>
-#include <sys/uio.h>
-#else
-#include <io.h>
-#ifndef S_ISFIFO
-#define S_ISFIFO(x) (0)
-#endif
-#endif
std::error_code RealFile::close() {
- if (::close(FD))
- return std::error_code(errno, std::generic_category());
+ std::error_code EC = sys::Process::SafelyCloseFileDescriptor(FD);
FD = -1;
- return std::error_code();
+ return EC;
}
namespace {
@@ -198,9 +214,10 @@ ErrorOr<Status> RealFileSystem::status(const Twine &Path) {
ErrorOr<std::unique_ptr<File>>
RealFileSystem::openFileForRead(const Twine &Name) {
int FD;
- if (std::error_code EC = sys::fs::openFileForRead(Name, FD))
+ SmallString<256> RealName;
+ if (std::error_code EC = sys::fs::openFileForRead(Name, FD, &RealName))
return EC;
- return std::unique_ptr<File>(new RealFile(FD, Name.str()));
+ return std::unique_ptr<File>(new RealFile(FD, Name.str(), RealName.str()));
}
llvm::ErrorOr<std::string> RealFileSystem::getCurrentWorkingDirectory() const {
@@ -271,7 +288,7 @@ directory_iterator RealFileSystem::dir_begin(const Twine &Dir,
// OverlayFileSystem implementation
//===-----------------------------------------------------------------------===/
OverlayFileSystem::OverlayFileSystem(IntrusiveRefCntPtr<FileSystem> BaseFS) {
- FSList.push_back(BaseFS);
+ FSList.push_back(std::move(BaseFS));
}
void OverlayFileSystem::pushOverlay(IntrusiveRefCntPtr<FileSystem> FS) {
@@ -711,7 +728,13 @@ public:
Status S)
: Entry(EK_Directory, Name), Contents(std::move(Contents)),
S(std::move(S)) {}
+ RedirectingDirectoryEntry(StringRef Name, Status S)
+ : Entry(EK_Directory, Name), S(std::move(S)) {}
Status getStatus() { return S; }
+ void addContent(std::unique_ptr<Entry> Content) {
+ Contents.push_back(std::move(Content));
+ }
+ Entry *getLastContent() const { return Contents.back().get(); }
typedef decltype(Contents)::iterator iterator;
iterator contents_begin() { return Contents.begin(); }
iterator contents_end() { return Contents.end(); }
@@ -739,6 +762,7 @@ public:
return UseName == NK_NotSet ? GlobalUseExternalName
: (UseName == NK_External);
}
+ NameKind getUseName() const { return UseName; }
static bool classof(const Entry *E) { return E->getKind() == EK_File; }
};
@@ -776,6 +800,7 @@ public:
/// All configuration options are optional.
/// 'case-sensitive': <boolean, default=true>
/// 'use-external-names': <boolean, default=true>
+/// 'overlay-relative': <boolean, default=false>
///
/// Virtual directories are represented as
/// \verbatim
@@ -815,6 +840,10 @@ class RedirectingFileSystem : public vfs::FileSystem {
std::vector<std::unique_ptr<Entry>> Roots;
/// \brief The file system to use for external references.
IntrusiveRefCntPtr<FileSystem> ExternalFS;
+ /// If IsRelativeOverlay is set, this represents the directory
+ /// path that should be prefixed to each 'external-contents' entry
+ /// when reading from YAML files.
+ std::string ExternalContentsPrefixDir;
/// @name Configuration
/// @{
@@ -822,18 +851,32 @@ class RedirectingFileSystem : public vfs::FileSystem {
/// \brief Whether to perform case-sensitive comparisons.
///
/// Currently, case-insensitive matching only works correctly with ASCII.
- bool CaseSensitive;
+ bool CaseSensitive = true;
+
+ /// IsRelativeOverlay marks whether a IsExternalContentsPrefixDir path must
+ /// be prefixed in every 'external-contents' when reading from YAML files.
+ bool IsRelativeOverlay = false;
/// \brief Whether to use to use the value of 'external-contents' for the
/// names of files. This global value is overridable on a per-file basis.
- bool UseExternalNames;
+ bool UseExternalNames = true;
/// @}
+ /// Virtual file paths and external files could be canonicalized without "..",
+ /// "." and "./" in their paths. FIXME: some unittests currently fail on
+ /// win32 when using remove_dots and remove_leading_dotslash on paths.
+ bool UseCanonicalizedPaths =
+#ifdef LLVM_ON_WIN32
+ false;
+#else
+ true;
+#endif
+
friend class RedirectingFileSystemParser;
private:
RedirectingFileSystem(IntrusiveRefCntPtr<FileSystem> ExternalFS)
- : ExternalFS(ExternalFS), CaseSensitive(true), UseExternalNames(true) {}
+ : ExternalFS(std::move(ExternalFS)) {}
/// \brief Looks up \p Path in \c Roots.
ErrorOr<Entry *> lookupPath(const Twine &Path);
@@ -851,8 +894,8 @@ public:
/// returns a virtual file system representing its contents.
static RedirectingFileSystem *
create(std::unique_ptr<MemoryBuffer> Buffer,
- SourceMgr::DiagHandlerTy DiagHandler, void *DiagContext,
- IntrusiveRefCntPtr<FileSystem> ExternalFS);
+ SourceMgr::DiagHandlerTy DiagHandler, StringRef YAMLFilePath,
+ void *DiagContext, IntrusiveRefCntPtr<FileSystem> ExternalFS);
ErrorOr<Status> status(const Twine &Path) override;
ErrorOr<std::unique_ptr<File>> openFileForRead(const Twine &Path) override;
@@ -885,6 +928,38 @@ public:
return directory_iterator(std::make_shared<VFSFromYamlDirIterImpl>(Dir,
*this, D->contents_begin(), D->contents_end(), EC));
}
+
+ void setExternalContentsPrefixDir(StringRef PrefixDir) {
+ ExternalContentsPrefixDir = PrefixDir.str();
+ }
+
+ StringRef getExternalContentsPrefixDir() const {
+ return ExternalContentsPrefixDir;
+ }
+
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
+LLVM_DUMP_METHOD void dump() const {
+ for (const std::unique_ptr<Entry> &Root : Roots)
+ dumpEntry(Root.get());
+ }
+
+LLVM_DUMP_METHOD void dumpEntry(Entry *E, int NumSpaces = 0) const {
+ StringRef Name = E->getName();
+ for (int i = 0, e = NumSpaces; i < e; ++i)
+ dbgs() << " ";
+ dbgs() << "'" << Name.str().c_str() << "'" << "\n";
+
+ if (E->getKind() == EK_Directory) {
+ auto *DE = dyn_cast<RedirectingDirectoryEntry>(E);
+ assert(DE && "Should be a directory");
+
+ for (std::unique_ptr<Entry> &SubEntry :
+ llvm::make_range(DE->contents_begin(), DE->contents_end()))
+ dumpEntry(SubEntry.get(), NumSpaces+2);
+ }
+ }
+#endif
+
};
/// \brief A helper class to hold the common YAML parsing state.
@@ -964,7 +1039,71 @@ class RedirectingFileSystemParser {
return true;
}
- std::unique_ptr<Entry> parseEntry(yaml::Node *N) {
+ Entry *lookupOrCreateEntry(RedirectingFileSystem *FS, StringRef Name,
+ Entry *ParentEntry = nullptr) {
+ if (!ParentEntry) { // Look for a existent root
+ for (const std::unique_ptr<Entry> &Root : FS->Roots) {
+ if (Name.equals(Root->getName())) {
+ ParentEntry = Root.get();
+ return ParentEntry;
+ }
+ }
+ } else { // Advance to the next component
+ auto *DE = dyn_cast<RedirectingDirectoryEntry>(ParentEntry);
+ for (std::unique_ptr<Entry> &Content :
+ llvm::make_range(DE->contents_begin(), DE->contents_end())) {
+ auto *DirContent = dyn_cast<RedirectingDirectoryEntry>(Content.get());
+ if (DirContent && Name.equals(Content->getName()))
+ return DirContent;
+ }
+ }
+
+ // ... or create a new one
+ std::unique_ptr<Entry> E = llvm::make_unique<RedirectingDirectoryEntry>(
+ Name, Status("", getNextVirtualUniqueID(), sys::TimeValue::now(), 0, 0,
+ 0, file_type::directory_file, sys::fs::all_all));
+
+ if (!ParentEntry) { // Add a new root to the overlay
+ FS->Roots.push_back(std::move(E));
+ ParentEntry = FS->Roots.back().get();
+ return ParentEntry;
+ }
+
+ auto *DE = dyn_cast<RedirectingDirectoryEntry>(ParentEntry);
+ DE->addContent(std::move(E));
+ return DE->getLastContent();
+ }
+
+ void uniqueOverlayTree(RedirectingFileSystem *FS, Entry *SrcE,
+ Entry *NewParentE = nullptr) {
+ StringRef Name = SrcE->getName();
+ switch (SrcE->getKind()) {
+ case EK_Directory: {
+ auto *DE = dyn_cast<RedirectingDirectoryEntry>(SrcE);
+ assert(DE && "Must be a directory");
+ // Empty directories could be present in the YAML as a way to
+ // describe a file for a current directory after some of its subdir
+ // is parsed. This only leads to redundant walks, ignore it.
+ if (!Name.empty())
+ NewParentE = lookupOrCreateEntry(FS, Name, NewParentE);
+ for (std::unique_ptr<Entry> &SubEntry :
+ llvm::make_range(DE->contents_begin(), DE->contents_end()))
+ uniqueOverlayTree(FS, SubEntry.get(), NewParentE);
+ break;
+ }
+ case EK_File: {
+ auto *FE = dyn_cast<RedirectingFileEntry>(SrcE);
+ assert(FE && "Must be a file");
+ assert(NewParentE && "Parent entry must exist");
+ auto *DE = dyn_cast<RedirectingDirectoryEntry>(NewParentE);
+ DE->addContent(llvm::make_unique<RedirectingFileEntry>(
+ Name, FE->getExternalContentsPath(), FE->getUseName()));
+ break;
+ }
+ }
+ }
+
+ std::unique_ptr<Entry> parseEntry(yaml::Node *N, RedirectingFileSystem *FS) {
yaml::MappingNode *M = dyn_cast<yaml::MappingNode>(N);
if (!M) {
error(N, "expected mapping node for file or directory entry");
@@ -1004,7 +1143,17 @@ class RedirectingFileSystemParser {
if (Key == "name") {
if (!parseScalarString(I->getValue(), Value, Buffer))
return nullptr;
- Name = Value;
+
+ if (FS->UseCanonicalizedPaths) {
+ SmallString<256> Path(Value);
+ // Guarantee that old YAML files containing paths with ".." and "."
+ // are properly canonicalized before read into the VFS.
+ Path = sys::path::remove_leading_dotslash(Path);
+ sys::path::remove_dots(Path, /*remove_dot_dot=*/true);
+ Name = Path.str();
+ } else {
+ Name = Value;
+ }
} else if (Key == "type") {
if (!parseScalarString(I->getValue(), Value, Buffer))
return nullptr;
@@ -1034,7 +1183,7 @@ class RedirectingFileSystemParser {
for (yaml::SequenceNode::iterator I = Contents->begin(),
E = Contents->end();
I != E; ++I) {
- if (std::unique_ptr<Entry> E = parseEntry(&*I))
+ if (std::unique_ptr<Entry> E = parseEntry(&*I, FS))
EntryArrayContents.push_back(std::move(E));
else
return nullptr;
@@ -1048,7 +1197,24 @@ class RedirectingFileSystemParser {
HasContents = true;
if (!parseScalarString(I->getValue(), Value, Buffer))
return nullptr;
- ExternalContentsPath = Value;
+
+ SmallString<256> FullPath;
+ if (FS->IsRelativeOverlay) {
+ FullPath = FS->getExternalContentsPrefixDir();
+ assert(!FullPath.empty() &&
+ "External contents prefix directory must exist");
+ llvm::sys::path::append(FullPath, Value);
+ } else {
+ FullPath = Value;
+ }
+
+ if (FS->UseCanonicalizedPaths) {
+ // Guarantee that old YAML files containing paths with ".." and "."
+ // are properly canonicalized before read into the VFS.
+ FullPath = sys::path::remove_leading_dotslash(FullPath);
+ sys::path::remove_dots(FullPath, /*remove_dot_dot=*/true);
+ }
+ ExternalContentsPath = FullPath.str();
} else if (Key == "use-external-name") {
bool Val;
if (!parseScalarBool(I->getValue(), Val))
@@ -1134,10 +1300,12 @@ public:
KeyStatusPair("version", true),
KeyStatusPair("case-sensitive", false),
KeyStatusPair("use-external-names", false),
+ KeyStatusPair("overlay-relative", false),
KeyStatusPair("roots", true),
};
DenseMap<StringRef, KeyStatus> Keys(std::begin(Fields), std::end(Fields));
+ std::vector<std::unique_ptr<Entry>> RootEntries;
// Parse configuration and 'roots'
for (yaml::MappingNode::iterator I = Top->begin(), E = Top->end(); I != E;
@@ -1159,8 +1327,8 @@ public:
for (yaml::SequenceNode::iterator I = Roots->begin(), E = Roots->end();
I != E; ++I) {
- if (std::unique_ptr<Entry> E = parseEntry(&*I))
- FS->Roots.push_back(std::move(E));
+ if (std::unique_ptr<Entry> E = parseEntry(&*I, FS))
+ RootEntries.push_back(std::move(E));
else
return false;
}
@@ -1185,6 +1353,9 @@ public:
} else if (Key == "case-sensitive") {
if (!parseScalarBool(I->getValue(), FS->CaseSensitive))
return false;
+ } else if (Key == "overlay-relative") {
+ if (!parseScalarBool(I->getValue(), FS->IsRelativeOverlay))
+ return false;
} else if (Key == "use-external-names") {
if (!parseScalarBool(I->getValue(), FS->UseExternalNames))
return false;
@@ -1198,6 +1369,13 @@ public:
if (!checkMissingKeys(Top, Keys))
return false;
+
+ // Now that we sucessefully parsed the YAML file, canonicalize the internal
+ // representation to a proper directory tree so that we can search faster
+ // inside the VFS.
+ for (std::unique_ptr<Entry> &E : RootEntries)
+ uniqueOverlayTree(FS, E.get());
+
return true;
}
};
@@ -1205,9 +1383,11 @@ public:
Entry::~Entry() = default;
-RedirectingFileSystem *RedirectingFileSystem::create(
- std::unique_ptr<MemoryBuffer> Buffer, SourceMgr::DiagHandlerTy DiagHandler,
- void *DiagContext, IntrusiveRefCntPtr<FileSystem> ExternalFS) {
+RedirectingFileSystem *
+RedirectingFileSystem::create(std::unique_ptr<MemoryBuffer> Buffer,
+ SourceMgr::DiagHandlerTy DiagHandler,
+ StringRef YAMLFilePath, void *DiagContext,
+ IntrusiveRefCntPtr<FileSystem> ExternalFS) {
SourceMgr SM;
yaml::Stream Stream(Buffer->getMemBufferRef(), SM);
@@ -1223,7 +1403,24 @@ RedirectingFileSystem *RedirectingFileSystem::create(
RedirectingFileSystemParser P(Stream);
std::unique_ptr<RedirectingFileSystem> FS(
- new RedirectingFileSystem(ExternalFS));
+ new RedirectingFileSystem(std::move(ExternalFS)));
+
+ if (!YAMLFilePath.empty()) {
+ // Use the YAML path from -ivfsoverlay to compute the dir to be prefixed
+ // to each 'external-contents' path.
+ //
+ // Example:
+ // -ivfsoverlay dummy.cache/vfs/vfs.yaml
+ // yields:
+ // FS->ExternalContentsPrefixDir => /<absolute_path_to>/dummy.cache/vfs
+ //
+ SmallString<256> OverlayAbsDir = sys::path::parent_path(YAMLFilePath);
+ std::error_code EC = llvm::sys::fs::make_absolute(OverlayAbsDir);
+ assert(!EC && "Overlay dir final path must be absolute");
+ (void)EC;
+ FS->setExternalContentsPrefixDir(OverlayAbsDir);
+ }
+
if (!P.parse(Root, FS.get()))
return nullptr;
@@ -1238,6 +1435,14 @@ ErrorOr<Entry *> RedirectingFileSystem::lookupPath(const Twine &Path_) {
if (std::error_code EC = makeAbsolute(Path))
return EC;
+ // Canonicalize path by removing ".", "..", "./", etc components. This is
+ // a VFS request, do bot bother about symlinks in the path components
+ // but canonicalize in order to perform the correct entry search.
+ if (UseCanonicalizedPaths) {
+ Path = sys::path::remove_leading_dotslash(Path);
+ sys::path::remove_dots(Path, /*remove_dot_dot=*/true);
+ }
+
if (Path.empty())
return make_error_code(llvm::errc::invalid_argument);
@@ -1254,20 +1459,32 @@ ErrorOr<Entry *> RedirectingFileSystem::lookupPath(const Twine &Path_) {
ErrorOr<Entry *>
RedirectingFileSystem::lookupPath(sys::path::const_iterator Start,
sys::path::const_iterator End, Entry *From) {
+#ifndef LLVM_ON_WIN32
+ assert(!isTraversalComponent(*Start) &&
+ !isTraversalComponent(From->getName()) &&
+ "Paths should not contain traversal components");
+#else
+ // FIXME: this is here to support windows, remove it once canonicalized
+ // paths become globally default.
if (Start->equals("."))
++Start;
+#endif
- // FIXME: handle ..
- if (CaseSensitive ? !Start->equals(From->getName())
- : !Start->equals_lower(From->getName()))
- // failure to match
- return make_error_code(llvm::errc::no_such_file_or_directory);
+ StringRef FromName = From->getName();
- ++Start;
+ // Forward the search to the next component in case this is an empty one.
+ if (!FromName.empty()) {
+ if (CaseSensitive ? !Start->equals(FromName)
+ : !Start->equals_lower(FromName))
+ // failure to match
+ return make_error_code(llvm::errc::no_such_file_or_directory);
- if (Start == End) {
- // Match!
- return From;
+ ++Start;
+
+ if (Start == End) {
+ // Match!
+ return From;
+ }
}
auto *DE = dyn_cast<RedirectingDirectoryEntry>(From);
@@ -1322,7 +1539,7 @@ class FileWithFixedStatus : public File {
public:
FileWithFixedStatus(std::unique_ptr<File> InnerFile, Status S)
- : InnerFile(std::move(InnerFile)), S(S) {}
+ : InnerFile(std::move(InnerFile)), S(std::move(S)) {}
ErrorOr<Status> status() override { return S; }
ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
@@ -1362,10 +1579,13 @@ RedirectingFileSystem::openFileForRead(const Twine &Path) {
IntrusiveRefCntPtr<FileSystem>
vfs::getVFSFromYAML(std::unique_ptr<MemoryBuffer> Buffer,
- SourceMgr::DiagHandlerTy DiagHandler, void *DiagContext,
+ SourceMgr::DiagHandlerTy DiagHandler,
+ StringRef YAMLFilePath,
+ void *DiagContext,
IntrusiveRefCntPtr<FileSystem> ExternalFS) {
return RedirectingFileSystem::create(std::move(Buffer), DiagHandler,
- DiagContext, ExternalFS);
+ YAMLFilePath, DiagContext,
+ std::move(ExternalFS));
}
UniqueID vfs::getNextVirtualUniqueID() {
@@ -1376,16 +1596,6 @@ UniqueID vfs::getNextVirtualUniqueID() {
return UniqueID(std::numeric_limits<uint64_t>::max(), ID);
}
-#ifndef NDEBUG
-static bool pathHasTraversal(StringRef Path) {
- using namespace llvm::sys;
- for (StringRef Comp : llvm::make_range(path::begin(Path), path::end(Path)))
- if (Comp == "." || Comp == "..")
- return true;
- return false;
-}
-#endif
-
void YAMLVFSWriter::addFileMapping(StringRef VirtualPath, StringRef RealPath) {
assert(sys::path::is_absolute(VirtualPath) && "virtual path not absolute");
assert(sys::path::is_absolute(RealPath) && "real path not absolute");
@@ -1407,7 +1617,9 @@ class JSONWriter {
public:
JSONWriter(llvm::raw_ostream &OS) : OS(OS) {}
- void write(ArrayRef<YAMLVFSEntry> Entries, Optional<bool> IsCaseSensitive);
+ void write(ArrayRef<YAMLVFSEntry> Entries, Optional<bool> UseExternalNames,
+ Optional<bool> IsCaseSensitive, Optional<bool> IsOverlayRelative,
+ StringRef OverlayDir);
};
}
@@ -1460,7 +1672,10 @@ void JSONWriter::writeEntry(StringRef VPath, StringRef RPath) {
}
void JSONWriter::write(ArrayRef<YAMLVFSEntry> Entries,
- Optional<bool> IsCaseSensitive) {
+ Optional<bool> UseExternalNames,
+ Optional<bool> IsCaseSensitive,
+ Optional<bool> IsOverlayRelative,
+ StringRef OverlayDir) {
using namespace llvm::sys;
OS << "{\n"
@@ -1468,12 +1683,30 @@ void JSONWriter::write(ArrayRef<YAMLVFSEntry> Entries,
if (IsCaseSensitive.hasValue())
OS << " 'case-sensitive': '"
<< (IsCaseSensitive.getValue() ? "true" : "false") << "',\n";
+ if (UseExternalNames.hasValue())
+ OS << " 'use-external-names': '"
+ << (UseExternalNames.getValue() ? "true" : "false") << "',\n";
+ bool UseOverlayRelative = false;
+ if (IsOverlayRelative.hasValue()) {
+ UseOverlayRelative = IsOverlayRelative.getValue();
+ OS << " 'overlay-relative': '"
+ << (UseOverlayRelative ? "true" : "false") << "',\n";
+ }
OS << " 'roots': [\n";
if (!Entries.empty()) {
const YAMLVFSEntry &Entry = Entries.front();
startDirectory(path::parent_path(Entry.VPath));
- writeEntry(path::filename(Entry.VPath), Entry.RPath);
+
+ StringRef RPath = Entry.RPath;
+ if (UseOverlayRelative) {
+ unsigned OverlayDirLen = OverlayDir.size();
+ assert(RPath.substr(0, OverlayDirLen) == OverlayDir &&
+ "Overlay dir must be contained in RPath");
+ RPath = RPath.slice(OverlayDirLen, RPath.size());
+ }
+
+ writeEntry(path::filename(Entry.VPath), RPath);
for (const auto &Entry : Entries.slice(1)) {
StringRef Dir = path::parent_path(Entry.VPath);
@@ -1487,7 +1720,14 @@ void JSONWriter::write(ArrayRef<YAMLVFSEntry> Entries,
OS << ",\n";
startDirectory(Dir);
}
- writeEntry(path::filename(Entry.VPath), Entry.RPath);
+ StringRef RPath = Entry.RPath;
+ if (UseOverlayRelative) {
+ unsigned OverlayDirLen = OverlayDir.size();
+ assert(RPath.substr(0, OverlayDirLen) == OverlayDir &&
+ "Overlay dir must be contained in RPath");
+ RPath = RPath.slice(OverlayDirLen, RPath.size());
+ }
+ writeEntry(path::filename(Entry.VPath), RPath);
}
while (!DirStack.empty()) {
@@ -1507,7 +1747,8 @@ void YAMLVFSWriter::write(llvm::raw_ostream &OS) {
return LHS.VPath < RHS.VPath;
});
- JSONWriter(OS).write(Mappings, IsCaseSensitive);
+ JSONWriter(OS).write(Mappings, UseExternalNames, IsCaseSensitive,
+ IsOverlayRelative, OverlayDir);
}
VFSFromYamlDirIterImpl::VFSFromYamlDirIterImpl(
generated by cgit v1.2.3 (git 2.25.1) at 2025-11-04 14:48:30 +0000