Just use std::filesystem (#450)

We require C++17 where `std::filesystem` is standard and we don't
support some of the older systems (like Mojave) anymore where we need to
use some other things like `gulrak` or `experimental`

CMakeLists.txt

@@ -53,13 +53,6 @@ if (${CP_BUILD_BLADEBIT_HARVESTER})
   FetchContent_MakeAvailable(bladebit)
 endif()
 
-FetchContent_Declare(
-  gulrak
-  GIT_REPOSITORY https://github.com/gulrak/filesystem.git
-  GIT_TAG        v1.5.14
-)
-FetchContent_MakeAvailable(gulrak)
-
 set(FSE_LIB ${CMAKE_CURRENT_SOURCE_DIR}/lib/FiniteStateEntropy/lib)
 set(FSE_FILES
     ${FSE_LIB}/fse_compress.c
@@ -72,7 +65,6 @@ include_directories(
   ${INCLUDE_DIRECTORIES}
   ${CMAKE_CURRENT_SOURCE_DIR}/../lib/include
   ${cxxopts_SOURCE_DIR}/include
-  ${gulrak_SOURCE_DIR}/include/ghc
   ${CMAKE_CURRENT_SOURCE_DIR}/../lib/FiniteStateEntropy/lib
   ${CMAKE_CURRENT_SOURCE_DIR}/src
   ${CMAKE_CURRENT_SOURCE_DIR}/test

src/b17sort_manager.hpp

@@ -20,8 +20,7 @@
 #include <iostream>
 #include <string>
 #include <vector>
-
-#include "chia_filesystem.hpp"
+#include <filesystem>
 
 #include "./bits.hpp"
 #include "./calculate_bucket.hpp"
@@ -30,6 +29,8 @@
 #include "./uniformsort.hpp"
 #include "exceptions.hpp"
 
+namespace fs = std::filesystem;
+
 class b17SortManager {
 public:
     b17SortManager(

src/disk.hpp

@@ -22,14 +22,13 @@
 #include <vector>
 #include <thread>
 #include <chrono>
-
+#include <filesystem>
 // enables disk I/O logging to disk.log
 // use tools/disk.gnuplot to generate a plot
 #define ENABLE_LOGGING 0
 
 using namespace std::chrono_literals; // for operator""min;
-
-#include "chia_filesystem.hpp"
+namespace fs = std::filesystem;
 
 #include "./bits.hpp"
 #include "./util.hpp"

src/phase1.hpp

@@ -35,8 +35,7 @@
 #include <thread>
 #include <memory>
 #include <mutex>
-
-#include "chia_filesystem.hpp"
+#include <filesystem>
 
 #include "calculate_bucket.hpp"
 #include "entry_sizes.hpp"
@@ -47,6 +46,8 @@
 #include "util.hpp"
 #include "progress.hpp"
 
+namespace fs = std::filesystem;
+
 struct THREADDATA {
     int index;
     Sem::type* mine;

src/plotter_disk.hpp

@@ -32,8 +32,7 @@
 #include <string>
 #include <vector>
 #include <memory>
-
-#include "chia_filesystem.hpp"
+#include <filesystem>
 
 #include "calculate_bucket.hpp"
 #include "encoding.hpp"
@@ -51,6 +50,7 @@
 #include "util.hpp"
 
 #define B17PHASE23
+namespace fs = std::filesystem;
 
 class DiskPlotter {
 public:

src/sort_manager.hpp

@@ -20,8 +20,7 @@
 #include <iostream>
 #include <string>
 #include <vector>
-
-#include "chia_filesystem.hpp"
+#include <filesystem>
 
 #include "./bits.hpp"
 #include "./calculate_bucket.hpp"
@@ -31,6 +30,8 @@
 #include "disk.hpp"
 #include "exceptions.hpp"
 
+namespace fs = std::filesystem;
+
 enum class strategy_t : uint8_t
 {
     uniform,