clang/lib/DirectoryWatcher/DirectoryScanner.cpp

   1 //===- DirectoryScanner.cpp - Utility functions for DirectoryWatcher ------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "DirectoryScanner.h"
  10
  11 #include "llvm/Support/Path.h"
  12 #include <optional>
  13
  14 namespace clang {
  15
  16 using namespace llvm;
  17
  18 std::optional<sys::fs::file_status> getFileStatus(StringRef Path) {
  19   sys::fs::file_status Status;
  20   std::error_code EC = status(Path, Status);
  21   if (EC)
  22     return std::nullopt;
  23   return Status;
  24 }
  25
  26 std::vector<std::string> scanDirectory(StringRef Path) {
  27   using namespace llvm::sys;
  28   std::vector<std::string> Result;
  29
  30   std::error_code EC;
  31   for (auto It = fs::directory_iterator(Path, EC),
  32             End = fs::directory_iterator();
  33        !EC && It != End; It.increment(EC)) {
  34     auto status = getFileStatus(It->path());
  35     if (!status)
  36       continue;
  37     Result.emplace_back(sys::path::filename(It->path()));
  38   }
  39
  40   return Result;
  41 }
  42
  43 std::vector<DirectoryWatcher::Event>
  44 getAsFileEvents(const std::vector<std::string> &Scan) {
  45   std::vector<DirectoryWatcher::Event> Events;
  46   Events.reserve(Scan.size());
  47
  48   for (const auto &File : Scan) {
  49     Events.emplace_back(DirectoryWatcher::Event{
  50         DirectoryWatcher::Event::EventKind::Modified, File});
  51   }
  52   return Events;
  53 }
  54
  55 } // namespace clang