From 295915ceb727301fdea8cf11c2a871ccd1b5981f Mon Sep 17 00:00:00 2001
From: Eric Liu <ioeric@google.com>
Date: Thu, 24 Mar 2016 13:22:28 +0000
Subject: [PATCH] Revert "removed redundant comment in format::getStyle."

This reverts commit r264254.

llvm-svn: 264275
---
 clang/lib/Format/Format.cpp | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index 31dc259..6d03b62 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -2099,7 +2099,10 @@ static FormatStyle::LanguageKind getLanguageByFileName(StringRef FileName) {
 }
 
 FormatStyle getStyle(StringRef StyleName, StringRef FileName,
-                     StringRef FallbackStyle) {
+                     StringRef FallbackStyle, vfs::FileSystem *FS) {
+  if (!FS) {
+    FS = vfs::getRealFileSystem().get();
+  }
   FormatStyle Style = getLLVMStyle();
   Style.Language = getLanguageByFileName(FileName);
   if (!getPredefinedStyle(FallbackStyle, Style.Language, &Style)) {
@@ -2130,28 +2133,35 @@ FormatStyle getStyle(StringRef StyleName, StringRef FileName,
   llvm::sys::fs::make_absolute(Path);
   for (StringRef Directory = Path; !Directory.empty();
        Directory = llvm::sys::path::parent_path(Directory)) {
-    if (!llvm::sys::fs::is_directory(Directory))
+
+    auto Status = FS->status(Directory);
+    if (!Status ||
+        Status->getType() != llvm::sys::fs::file_type::directory_file) {
       continue;
+    }
+
     SmallString<128> ConfigFile(Directory);
 
     llvm::sys::path::append(ConfigFile, ".clang-format");
     DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
-    bool IsFile = false;
     // Ignore errors from is_regular_file: we only need to know if we can read
     // the file or not.
-    llvm::sys::fs::is_regular_file(Twine(ConfigFile), IsFile);
-
+    Status = FS->status(ConfigFile.str());
+    bool IsFile =
+        Status && (Status->getType() == llvm::sys::fs::file_type::regular_file);
     if (!IsFile) {
       // Try _clang-format too, since dotfiles are not commonly used on Windows.
       ConfigFile = Directory;
       llvm::sys::path::append(ConfigFile, "_clang-format");
       DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
-      llvm::sys::fs::is_regular_file(Twine(ConfigFile), IsFile);
+      Status = FS->status(ConfigFile.str());
+      IsFile = Status &&
+               (Status->getType() == llvm::sys::fs::file_type::regular_file);
     }
 
     if (IsFile) {
       llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Text =
-          llvm::MemoryBuffer::getFile(ConfigFile.c_str());
+          FS->getBufferForFile(ConfigFile.str());
       if (std::error_code EC = Text.getError()) {
         llvm::errs() << EC.message() << "\n";
         break;
-- 
2.7.4