From fb9413cb84cc422426c81f6464083795e781566b Mon Sep 17 00:00:00 2001
From: Nico Weber <thakis@chromium.org>
Date: Thu, 16 Jan 2020 10:27:25 -0500
Subject: [PATCH] Remove some SVN-specific code.

$URL$ is an SVN keyword substitution enabled via
`svn propset svn:keywords "URL" tools/clang/lib/Basic/Version.cpp`.
Now that we no longer use SVN, it's no longer being replaced by
anything, and we no longer offer svn exports. So remove the
$URL$-specific logic.

The "cfe" path prefix removal also no longer makes sense now that
we're on git: Both CLANG_REPOSITORY and LLVM_REPOSITORY are usually
set to https://github.com/llvm/llvm-project.git

So remove that too, and remove the "llvm" prefix removal for symmetry.
With the github url, "llvm" _is_ found in the string, but not in
the place the function expected. Nobody noticed since the llvm
repository path is only used if CLANG_REVISION and LLVM_REVISION are
different, which in the git monorepo world they never should be.
(I might remove the "// Support LLVM in a separate repository"
block in a separate commit.)

Differential Revision: https://reviews.llvm.org/D72848
---
 clang/lib/Basic/Version.cpp | 35 ++++-------------------------------
 1 file changed, 4 insertions(+), 31 deletions(-)

diff --git a/clang/lib/Basic/Version.cpp b/clang/lib/Basic/Version.cpp
index c69d13b..c4b7d34 100644
--- a/clang/lib/Basic/Version.cpp
+++ b/clang/lib/Basic/Version.cpp
@@ -28,46 +28,19 @@ std::string getClangRepositoryPath() {
   return CLANG_REPOSITORY_STRING;
 #else
 #ifdef CLANG_REPOSITORY
-  StringRef URL(CLANG_REPOSITORY);
+  return CLANG_REPOSITORY;
 #else
-  StringRef URL("");
+  return "";
 #endif
-
-  // If the CLANG_REPOSITORY is empty, try to use the SVN keyword. This helps us
-  // pick up a tag in an SVN export, for example.
-  StringRef SVNRepository("$URL$");
-  if (URL.empty()) {
-    URL = SVNRepository.slice(SVNRepository.find(':'),
-                              SVNRepository.find("/lib/Basic"));
-  }
-
-  // Strip off version from a build from an integration branch.
-  URL = URL.slice(0, URL.find("/src/tools/clang"));
-
-  // Trim path prefix off, assuming path came from standard cfe path.
-  size_t Start = URL.find("cfe/");
-  if (Start != StringRef::npos)
-    URL = URL.substr(Start + 4);
-
-  return URL;
 #endif
 }
 
 std::string getLLVMRepositoryPath() {
 #ifdef LLVM_REPOSITORY
-  StringRef URL(LLVM_REPOSITORY);
+  return LLVM_REPOSITORY;
 #else
-  StringRef URL("");
+  return "";
 #endif
-
-  // Trim path prefix off, assuming path came from standard llvm path.
-  // Leave "llvm/" prefix to distinguish the following llvm revision from the
-  // clang revision.
-  size_t Start = URL.find("llvm/");
-  if (Start != StringRef::npos)
-    URL = URL.substr(Start);
-
-  return URL;
 }
 
 std::string getClangRevision() {
-- 
2.7.4