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      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
     55