[clangd] Customizable URI schemes for dynamic index.

Summary:
This allows dynamic index to have consistent URI schemes with the
static index which can have customized URI schemes, which would make file
proximity scoring based on URIs easier.

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: ilya-biryukov, MaskRay, jkorous, cfe-commits

Differential Revision: https://reviews.llvm.org/D47931

llvm-svn: 334809

1 files changed, 37 insertions, 0 deletions

diff --git a/clang-tools-extra/unittests/clangd/TestFS.cpp b/clang-tools-extra/unittests/clangd/TestFS.cpp
index 9020c6da63b..000d55854dc 100644
--- a/clang-tools-extra/unittests/clangd/TestFS.cpp
+++ b/clang-tools-extra/unittests/clangd/TestFS.cpp
@@ -7,7 +7,11 @@
 //
 //===----------------------------------------------------------------------===//
 #include "TestFS.h"
+#include "URI.h"
+#include "clang/AST/DeclCXX.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Errc.h"
+#include "llvm/Support/Path.h"
 #include "gtest/gtest.h"
 
 namespace clang {
@@ -62,5 +66,38 @@ std::string testPath(PathRef File) {
   return Path.str();
 }
 
+/// unittest: is a scheme that refers to files relative to testRoot()
+class TestScheme : public URIScheme {
+public:
+  static const char *Scheme;
+
+  llvm::Expected<std::string>
+  getAbsolutePath(llvm::StringRef /*Authority*/, llvm::StringRef Body,
+                  llvm::StringRef HintPath) const override {
+    assert(HintPath.startswith(testRoot()));
+    llvm::SmallString<16> Path(Body.begin(), Body.end());
+    llvm::sys::path::native(Path);
+    return testPath(Path);
+  }
+
+  llvm::Expected<URI>
+  uriFromAbsolutePath(llvm::StringRef AbsolutePath) const override {
+    llvm::StringRef Body = AbsolutePath;
+    if (!Body.consume_front(testRoot()))
+      return llvm::make_error<llvm::StringError>(
+          AbsolutePath + "does not start with " + testRoot(),
+          llvm::inconvertibleErrorCode());
+
+    return URI(Scheme, /*Authority=*/"",
+               llvm::sys::path::convert_to_slash(Body));
+  }
+};
+
+const char *TestScheme::Scheme = "unittest";
+
+static URISchemeRegistry::Add<TestScheme> X(TestScheme::Scheme, "Test schema");
+
+volatile int UnittestSchemeAnchorSource = 0;
+
 } // namespace clangd
 } // namespace clang