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
  13 namespace clang {
  14
  15 using namespace llvm;
  16
  17 Optional<sys::fs::file_status> getFileStatus(StringRef Path) {
  18   sys::fs::file_status Status;
  19   std::error_code EC = status(Path, Status);
  20   if (EC)
  21     return None;
  22   return Status;
  23 }
  24
  25 std::vector<std::string> scanDirectory(StringRef Path) {
  26   using namespace llvm::sys;
  27   std::vector<std::string> Result;
  28
  29   std::error_code EC;
  30   for (auto It = fs::directory_iterator(Path, EC),
  31             End = fs::directory_iterator();
  32        !EC && It != End; It.increment(EC)) {
  33     auto status = getFileStatus(It->path());
  34     if (!status.hasValue())
  35       continue;
  36     Result.emplace_back(sys::path::filename(It->path()));
  37   }
  38
  39   return Result;
  40 }
  41
  42 std::vector<DirectoryWatcher::Event>
  43 getAsFileEvents(const std::vector<std::string> &Scan) {
  44   std::vector<DirectoryWatcher::Event> Events;
  45   Events.reserve(Scan.size());
  46
  47   for (const auto &File : Scan) {
  48     Events.emplace_back(DirectoryWatcher::Event{
  49         DirectoryWatcher::Event::EventKind::Modified, File});
  50   }
  51   return Events;
  52 }
  53
  54 } // namespace clang