This revision was automatically updated to reflect the committed changes.
Closed by commit rL332717: [VFS] Implement getRealPath for OverlayFileSystem.
(authored by ioeric, committed by ).
Herald added a subscriber: llvm-commits.
Repository:
rL LLVM
https://reviews.llvm.org/D47060
Files:
cfe/trunk/include/clang/Basic/VirtualFileSystem.h
cfe/trunk/lib/Basic/VirtualFileSystem.cpp
cfe/trunk/unittests/Basic/VirtualFileSystemTest.cpp
Index: cfe/trunk/lib/Basic/VirtualFileSystem.cpp
===================================================================
--- cfe/trunk/lib/Basic/VirtualFileSystem.cpp
+++ cfe/trunk/lib/Basic/VirtualFileSystem.cpp
@@ -381,6 +381,15 @@
return {};
}
+std::error_code
+OverlayFileSystem::getRealPath(const Twine &Path,
+ SmallVectorImpl<char> &Output) const {
+ for (auto &FS : FSList)
+ if (FS->exists(Path))
+ return FS->getRealPath(Path, Output);
+ return errc::no_such_file_or_directory;
+}
+
clang::vfs::detail::DirIterImpl::~DirIterImpl() = default;
namespace {
Index: cfe/trunk/unittests/Basic/VirtualFileSystemTest.cpp
===================================================================
--- cfe/trunk/unittests/Basic/VirtualFileSystemTest.cpp
+++ cfe/trunk/unittests/Basic/VirtualFileSystemTest.cpp
@@ -67,6 +67,21 @@
std::error_code setCurrentWorkingDirectory(const Twine &Path) override {
return std::error_code();
}
+ // Map any symlink to "/symlink".
+ std::error_code getRealPath(const Twine &Path,
+ SmallVectorImpl<char> &Output) const override {
+ auto I = FilesAndDirs.find(Path.str());
+ if (I == FilesAndDirs.end())
+ return make_error_code(llvm::errc::no_such_file_or_directory);
+ if (I->second.isSymlink()) {
+ Output.clear();
+ Twine("/symlink").toVector(Output);
+ return std::error_code();
+ }
+ Output.clear();
+ Path.toVector(Output);
+ return std::error_code();
+ }
struct DirIterImpl : public clang::vfs::detail::DirIterImpl {
std::map<std::string, vfs::Status> &FilesAndDirs;
@@ -196,6 +211,35 @@
EXPECT_TRUE(Status->equivalent(*Status2));
}
+TEST(VirtualFileSystemTest, GetRealPathInOverlay) {
+ IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
+ Lower->addRegularFile("/foo");
+ Lower->addSymlink("/lower_link");
+ IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
+
+ IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
+ new vfs::OverlayFileSystem(Lower));
+ O->pushOverlay(Upper);
+
+ // Regular file.
+ SmallString<16> RealPath;
+ EXPECT_FALSE(O->getRealPath("/foo", RealPath));
+ EXPECT_EQ(RealPath.str(), "/foo");
+
+ // Expect no error getting real path for symlink in lower overlay.
+ EXPECT_FALSE(O->getRealPath("/lower_link", RealPath));
+ EXPECT_EQ(RealPath.str(), "/symlink");
+
+ // Try a non-existing link.
+ EXPECT_EQ(O->getRealPath("/upper_link", RealPath),
+ errc::no_such_file_or_directory);
+
+ // Add a new symlink in upper.
+ Upper->addSymlink("/upper_link");
+ EXPECT_FALSE(O->getRealPath("/upper_link", RealPath));
+ EXPECT_EQ(RealPath.str(), "/symlink");
+}
+
TEST(VirtualFileSystemTest, OverlayFiles) {
IntrusiveRefCntPtr<DummyFileSystem> Base(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());
Index: cfe/trunk/include/clang/Basic/VirtualFileSystem.h
===================================================================
--- cfe/trunk/include/clang/Basic/VirtualFileSystem.h
+++ cfe/trunk/include/clang/Basic/VirtualFileSystem.h
@@ -304,15 +304,20 @@
directory_iterator dir_begin(const Twine &Dir, std::error_code &EC) override;
llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override;
std::error_code setCurrentWorkingDirectory(const Twine &Path) override;
+ std::error_code getRealPath(const Twine &Path,
+ SmallVectorImpl<char> &Output) const override;
using iterator = FileSystemList::reverse_iterator;
-
+ using const_iterator = FileSystemList::const_reverse_iterator;
+
/// Get an iterator pointing to the most recently added file system.
iterator overlays_begin() { return FSList.rbegin(); }
+ const_iterator overlays_begin() const { return FSList.rbegin(); }
/// Get an iterator pointing one-past the least recently added file
/// system.
iterator overlays_end() { return FSList.rend(); }
+ const_iterator overlays_end() const { return FSList.rend(); }
};
namespace detail {
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