[PATCH] D155195: [include-cleaner] Avoid a caching issue when running --edit mode on multiple files.

[Haojian Wu via Phabricator via cfe-commits]

hokein created this revision.
hokein added a reviewer: kadircet.
Herald added a project: All.
hokein requested review of this revision.
Herald added a project: clang-tools-extra.

Snapshot all analysing files before running the tool, this makes sure
that we analyse all files statelessly and avoid the FileManager caching issue
when running `-edit` on multiple files.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D155195

Files:
  clang-tools-extra/include-cleaner/tool/IncludeCleaner.cpp


Index: clang-tools-extra/include-cleaner/tool/IncludeCleaner.cpp
===================================================================
--- clang-tools-extra/include-cleaner/tool/IncludeCleaner.cpp
+++ clang-tools-extra/include-cleaner/tool/IncludeCleaner.cpp
@@ -19,6 +19,7 @@
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FormatVariadic.h"
+#include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/Regex.h"
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/raw_ostream.h"
@@ -270,10 +271,22 @@
       }
     }
   }
+
+  clang::tooling::ClangTool Tool(OptionsParser->getCompilations(),
+                                 OptionsParser->getSourcePathList());
+  std::vector<std::unique_ptr<llvm::MemoryBuffer>> Buffers;
+  for (const auto &File : OptionsParser->getSourcePathList()) {
+    auto Content = llvm::MemoryBuffer::getFile(File);
+    if (!Content) {
+      llvm::errs() << "Error: can't read file '" << File
+                   << "': " << Content.getError().message() << "\n";
+      return 1;
+    }
+    Buffers.push_back(std::move(Content.get()));
+    Tool.mapVirtualFile(File, Buffers.back()->getBuffer());
+  }
+
   auto HeaderFilter = headerFilter();
   ActionFactory Factory(HeaderFilter);
-  return clang::tooling::ClangTool(OptionsParser->getCompilations(),
-                                   OptionsParser->getSourcePathList())
-             .run(&Factory) ||
-         Errors != 0;
+  return Tool.run(&Factory) || Errors != 0;
 }


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