switch back to boost::filesystem to avoid the requirement of c++17

webcc/logger.cc

@@ -6,7 +6,6 @@
 #include <chrono>
 #include <cstdarg>
 #include <ctime>
-#include <filesystem>
 #include <iomanip>  // for put_time
 #include <mutex>
 #include <sstream>
@@ -21,6 +20,10 @@
 #include <sys/types.h>
 #endif
 
+#include "boost/filesystem/operations.hpp"
+
+namespace bfs = boost::filesystem;
+
 namespace webcc {
 
 // -----------------------------------------------------------------------------
@@ -33,7 +36,7 @@ static const char* kLevelNames[] = {
 
 // -----------------------------------------------------------------------------
 
-static FILE* FOpen(const std::filesystem::path& path, bool overwrite) {
+static FILE* FOpen(const bfs::path& path, bool overwrite) {
 #if (defined(_WIN32) || defined(_WIN64))
   return _wfopen(path.wstring().c_str(), overwrite ? L"w+" : L"a+");
 #else
@@ -45,7 +48,7 @@ struct Logger {
   Logger() : file(nullptr), modes(0) {
   }
 
-  void Init(const std::filesystem::path& path, int _modes) {
+  void Init(const bfs::path& path, int _modes) {
     modes = _modes;
 
     // Create log file only if necessary.
@@ -153,22 +156,22 @@ static std::string GetThreadID() {
   return thread_id;
 }
 
-static std::filesystem::path InitLogPath(const std::filesystem::path& dir) {
+static bfs::path InitLogPath(const bfs::path& dir) {
   if (dir.empty()) {
-    return std::filesystem::current_path() / WEBCC_LOG_FILE_NAME;
+    return bfs::current_path() / WEBCC_LOG_FILE_NAME;
   }
 
-  if (!std::filesystem::exists(dir) || !std::filesystem::is_directory(dir)) {
-    std::error_code ec;
-    if (!std::filesystem::create_directories(dir, ec) || ec) {
-      return std::filesystem::path{};
+  if (!bfs::exists(dir) || !bfs::is_directory(dir)) {
+    boost::system::error_code ec;
+    if (!bfs::create_directories(dir, ec) || ec) {
+      return bfs::path{};
     }
   }
 
   return (dir / WEBCC_LOG_FILE_NAME);
 }
 
-void LogInit(const std::filesystem::path& dir, int modes) {
+void LogInit(const bfs::path& dir, int modes) {
   // Suppose this is called from the main thread.
   g_main_thread_id = DoGetThreadID();