From f8d2778b659a12a94b60258f949373ad42f964a1 Mon Sep 17 00:00:00 2001
From: Fangrui Song <i@maskray.me>
Date: Thu, 1 Feb 2024 23:58:38 -0800
Subject: [PATCH] Adapt llvm/llvm-project#74910: FileEntry::getName

Based on a patch by @zsrkmyn
---
 src/clang_tu.cc     |  8 ++++++++
 src/clang_tu.hh     |  4 ++++
 src/indexer.cc      | 19 ++++++++++++++++++-
 src/sema_manager.cc |  8 ++++++++
 4 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/src/clang_tu.cc b/src/clang_tu.cc
index 1800e2d23..2cf8f70fa 100644
--- a/src/clang_tu.cc
+++ b/src/clang_tu.cc
@@ -23,13 +23,21 @@
 using namespace clang;
 
 namespace ccls {
+#if LLVM_VERSION_MAJOR < 19
 std::string pathFromFileEntry(const FileEntry &file) {
+#else
+std::string pathFromFileEntry(FileEntryRef file) {
+#endif
   std::string ret;
   if (file.getName().startswith("/../")) {
     // Resolve symlinks outside of working folders. This handles leading path
     // components, e.g. (/lib -> /usr/lib) in
     // /../lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/utility
+#if LLVM_VERSION_MAJOR < 19
     ret = file.tryGetRealPathName();
+#else
+    ret = file.getFileEntry().tryGetRealPathName();
+#endif
   } else {
     // If getName() refers to a file within a workspace folder, we prefer it
     // (which may be a symlink).
diff --git a/src/clang_tu.hh b/src/clang_tu.hh
index 7dbfc4a88..cba38e568 100644
--- a/src/clang_tu.hh
+++ b/src/clang_tu.hh
@@ -22,7 +22,11 @@ namespace vfs = clang::vfs;
 #endif
 
 namespace ccls {
+#if LLVM_VERSION_MAJOR < 19
 std::string pathFromFileEntry(const clang::FileEntry &file);
+#else
+std::string pathFromFileEntry(clang::FileEntryRef file);
+#endif
 
 bool isInsideMainFile(const clang::SourceManager &sm, clang::SourceLocation sl);
 
diff --git a/src/indexer.cc b/src/indexer.cc
index 68d3f810a..f550f22ab 100644
--- a/src/indexer.cc
+++ b/src/indexer.cc
@@ -68,7 +68,11 @@ struct IndexParam {
     // generating an index for it):
     auto [it, inserted] = uid2file.try_emplace(fid);
     if (inserted) {
+#if LLVM_VERSION_MAJOR < 19
       const FileEntry *fe = ctx->getSourceManager().getFileEntryForID(fid);
+#else
+      OptionalFileEntryRef fe = ctx->getSourceManager().getFileEntryRefForID(fid);
+#endif
       if (!fe)
         return;
       std::string path = pathFromFileEntry(*fe);
@@ -94,9 +98,14 @@ struct IndexParam {
 
   bool useMultiVersion(FileID fid) {
     auto it = uid2multi.try_emplace(fid);
-    if (it.second)
+    if (it.second) {
+#if LLVM_VERSION_MAJOR < 19
       if (const FileEntry *fe = ctx->getSourceManager().getFileEntryForID(fid))
+#else
+      if (OptionalFileEntryRef fe = ctx->getSourceManager().getFileEntryRefForID(fid))
+#endif
         it.first->second = multiVersionMatcher->matches(pathFromFileEntry(*fe));
+    }
     return it.first->second;
   }
 };
@@ -636,7 +645,11 @@ class IndexDataConsumer : public index::IndexDataConsumer {
   static int getFileLID(IndexFile *db, SourceManager &sm, FileID fid) {
     auto [it, inserted] = db->uid2lid_and_path.try_emplace(fid);
     if (inserted) {
+#if LLVM_VERSION_MAJOR < 19
       const FileEntry *fe = sm.getFileEntryForID(fid);
+#else
+      OptionalFileEntryRef fe = sm.getFileEntryRefForID(fid);
+#endif
       if (!fe) {
         it->second.first = -1;
         return -1;
@@ -1124,7 +1137,11 @@ class IndexPPCallbacks : public PPCallbacks {
                                      filenameRange, nullptr);
     FileID fid = sm.getFileID(filenameRange.getBegin());
     if (IndexFile *db = param.consumeFile(fid)) {
+#if LLVM_VERSION_MAJOR < 19
       std::string path = pathFromFileEntry(*file);
+#else
+      std::string path = pathFromFileEntry(*fileRef);
+#endif
       if (path.size())
         db->includes.push_back({spell.start.line, intern(path)});
     }
diff --git a/src/sema_manager.cc b/src/sema_manager.cc
index 6be9e60dd..5b09cf92e 100644
--- a/src/sema_manager.cc
+++ b/src/sema_manager.cc
@@ -194,7 +194,11 @@ class StoreInclude : public PPCallbacks {
     const FileEntry *file = fileRef ? &fileRef->getFileEntry() : nullptr;
 #endif
     if (file && seen.insert(file).second)
+#if LLVM_VERSION_MAJOR < 19
       out.emplace_back(pathFromFileEntry(*file), file->getModificationTime());
+#else
+      out.emplace_back(pathFromFileEntry(*fileRef), file->getModificationTime());
+#endif
   }
 };
 
@@ -236,7 +240,11 @@ class StoreDiags : public DiagnosticConsumer {
     FileID fid = sm.getFileID(l);
     auto it = fID2concerned.try_emplace(fid.getHashValue());
     if (it.second) {
+#if LLVM_VERSION_MAJOR < 19
       const FileEntry *fe = sm.getFileEntryForID(fid);
+#else
+      OptionalFileEntryRef fe = sm.getFileEntryRefForID(fid);
+#endif
       it.first->second = fe && pathFromFileEntry(*fe) == path;
     }
     return it.first->second;