Allow multi-component paths in VFS file nodes
This allows the 'name' field to contain a path, like
{ 'type': 'directory',
'name': '/path/to/dir',
'contents': [ ... ] }
which not only simplifies reading and writing these files (for humans),
but makes it possible to easily modify locations via textual
replacement, which would not have worked in the old scheme.
E.g. sed s:<ROOT>:<NEW ROOT>
llvm-svn: 202109
diff --git a/clang/lib/Basic/VirtualFileSystem.cpp b/clang/lib/Basic/VirtualFileSystem.cpp
index 6aef524..881e166 100644
--- a/clang/lib/Basic/VirtualFileSystem.cpp
+++ b/clang/lib/Basic/VirtualFileSystem.cpp
@@ -227,9 +227,6 @@
public:
virtual ~Entry();
-#if LLVM_HAS_RVALUE_REFERENCES
- Entry(EntryKind K, std::string Name) : Kind(K), Name(std::move(Name)) {}
-#endif
Entry(EntryKind K, StringRef Name) : Kind(K), Name(Name) {}
StringRef getName() const { return Name; }
EntryKind getKind() const { return Kind; }
@@ -242,8 +239,8 @@
public:
virtual ~DirectoryEntry();
#if LLVM_HAS_RVALUE_REFERENCES
- DirectoryEntry(std::string Name, std::vector<Entry *> Contents, Status S)
- : Entry(EK_Directory, std::move(Name)), Contents(std::move(Contents)),
+ DirectoryEntry(StringRef Name, std::vector<Entry *> Contents, Status S)
+ : Entry(EK_Directory, Name), Contents(std::move(Contents)),
S(std::move(S)) {}
#endif
DirectoryEntry(StringRef Name, ArrayRef<Entry *> Contents, const Status &S)
@@ -259,11 +256,6 @@
std::string ExternalContentsPath;
public:
-#if LLVM_HAS_RVALUE_REFERENCES
- FileEntry(std::string Name, std::string ExternalContentsPath)
- : Entry(EK_File, std::move(Name)),
- ExternalContentsPath(std::move(ExternalContentsPath)) {}
-#endif
FileEntry(StringRef Name, StringRef ExternalContentsPath)
: Entry(EK_File, Name), ExternalContentsPath(ExternalContentsPath) {}
StringRef getExternalContentsPath() const { return ExternalContentsPath; }
@@ -318,8 +310,9 @@
///
/// and inherit their attributes from the external contents.
///
-/// In both cases, the 'name' field must be a single path component (containing
-/// no separators).
+/// In both cases, the 'name' field may contain multiple path components (e.g.
+/// /path/to/file). However, any directory that contains more than one child
+/// must be uniquely represented by a directory entry.
class VFSFromYAML : public vfs::FileSystem {
std::vector<Entry *> Roots; ///< The root(s) of the virtual file system.
/// \brief The file system to use for external references.
@@ -482,10 +475,6 @@
if (!parseScalarString(I->getValue(), Value, Buffer))
return NULL;
Name = Value;
- if (sys::path::has_parent_path(Name)) {
- error(I->getValue(), "unexpected path separator in name");
- return NULL;
- }
} else if (Key == "type") {
if (!parseScalarString(I->getValue(), Value, Buffer))
return NULL;
@@ -546,16 +535,38 @@
if (!checkMissingKeys(N, Keys))
return NULL;
+ // Remove trailing slash(es)
+ StringRef Trimmed(Name);
+ while (Trimmed.size() > 1 && sys::path::is_separator(Trimmed.back()))
+ Trimmed = Trimmed.slice(0, Trimmed.size()-1);
+ // Get the last component
+ StringRef LastComponent = sys::path::filename(Trimmed);
+
+ Entry *Result = 0;
switch (Kind) {
case EK_File:
- return new FileEntry(llvm_move(Name), llvm_move(ExternalContentsPath));
+ Result = new FileEntry(LastComponent, llvm_move(ExternalContentsPath));
+ break;
case EK_Directory:
- return new DirectoryEntry(
- llvm_move(Name), llvm_move(EntryArrayContents),
+ Result = new DirectoryEntry(LastComponent, llvm_move(EntryArrayContents),
+ Status("", "", getNextVirtualUniqueID(), sys::TimeValue::now(), 0, 0,
+ 0, file_type::directory_file, sys::fs::all_all));
+ break;
+ }
+
+ StringRef Parent = sys::path::parent_path(Trimmed);
+ if (Parent.empty())
+ return Result;
+
+ // if 'name' contains multiple components, create implicit directory entries
+ for (sys::path::reverse_iterator I = sys::path::rbegin(Parent),
+ E = sys::path::rend(Parent);
+ I != E; ++I) {
+ Result = new DirectoryEntry(*I, Result,
Status("", "", getNextVirtualUniqueID(), sys::TimeValue::now(), 0, 0,
0, file_type::directory_file, sys::fs::all_all));
}
- llvm_unreachable("unknown EntryKind in switch");
+ return Result;
}
public: