blockchain_export: Add --output-file argument

This option will export to the specified file path.

The default file path remains <data-dir>/export/blockchain.raw

src/blockchain_utilities/blockchain_export.cpp

@@ -39,13 +39,14 @@ int main(int argc, char* argv[])
 {
   uint32_t log_level = 0;
   uint64_t block_stop = 0;
-  std::string import_filename = BLOCKCHAIN_RAW;
 
   boost::filesystem::path default_data_path {tools::get_default_data_dir()};
   boost::filesystem::path default_testnet_data_path {default_data_path / "testnet"};
+  boost::filesystem::path output_file_path;
 
   po::options_description desc_cmd_only("Command line options");
   po::options_description desc_cmd_sett("Command line options and settings options");
+  const command_line::arg_descriptor<std::string> arg_output_file = {"output-file", "Specify output file", "", true};
   const command_line::arg_descriptor<uint32_t> arg_log_level  = {"log-level",  "", log_level};
   const command_line::arg_descriptor<uint64_t> arg_block_stop = {"block-stop", "Stop at block number", block_stop};
   const command_line::arg_descriptor<bool>     arg_testnet_on = {
@@ -57,6 +58,7 @@ int main(int argc, char* argv[])
 
   command_line::add_arg(desc_cmd_sett, command_line::arg_data_dir, default_data_path.string());
   command_line::add_arg(desc_cmd_sett, command_line::arg_testnet_data_dir, default_testnet_data_path.string());
+  command_line::add_arg(desc_cmd_sett, arg_output_file);
   command_line::add_arg(desc_cmd_sett, arg_testnet_on);
   command_line::add_arg(desc_cmd_sett, arg_log_level);
   command_line::add_arg(desc_cmd_sett, arg_block_stop);
@@ -97,9 +99,12 @@ int main(int argc, char* argv[])
 
   auto data_dir_arg = opt_testnet ? command_line::arg_testnet_data_dir : command_line::arg_data_dir;
   m_config_folder = command_line::get_arg(vm, data_dir_arg);
-  boost::filesystem::path output_dir {m_config_folder};
-  output_dir /= "export";
-  LOG_PRINT_L0("Export directory: " << output_dir.string());
+
+  if (command_line::has_arg(vm, arg_output_file))
+    output_file_path = boost::filesystem::path(command_line::get_arg(vm, arg_output_file));
+  else
+    output_file_path = boost::filesystem::path(m_config_folder) / "export" / BLOCKCHAIN_RAW;
+  LOG_PRINT_L0("Export output file: " << output_file_path.string());
 
   // If we wanted to use the memory pool, we would set up a fake_core.
 
@@ -151,7 +156,7 @@ int main(int argc, char* argv[])
   LOG_PRINT_L0("Exporting blockchain raw data...");
 
   BootstrapFile bootstrap;
-  r = bootstrap.store_blockchain_raw(core_storage, NULL, output_dir, block_stop);
+  r = bootstrap.store_blockchain_raw(core_storage, NULL, output_file_path, block_stop);
   CHECK_AND_ASSERT_MES(r, false, "Failed to export blockchain raw data");
   LOG_PRINT_L0("Blockchain raw data exported OK");
 }

src/blockchain_utilities/bootstrap_file.cpp

@@ -50,8 +50,9 @@ namespace
 
 
 
-bool BootstrapFile::open_writer(const boost::filesystem::path& dir_path)
+bool BootstrapFile::open_writer(const boost::filesystem::path& file_path)
 {
+  const boost::filesystem::path dir_path = file_path.parent_path();
   if (boost::filesystem::exists(dir_path))
   {
     if (!boost::filesystem::is_directory(dir_path))
@@ -69,7 +70,6 @@ bool BootstrapFile::open_writer(const boost::filesystem::path& dir_path)
     }
   }
 
-  std::string file_path = (dir_path / BLOCKCHAIN_RAW).string();
   m_raw_data_file = new std::ofstream();
 
   bool do_initialize_file = false;
@@ -83,15 +83,15 @@ bool BootstrapFile::open_writer(const boost::filesystem::path& dir_path)
   }
   else
   {
-    num_blocks = count_blocks(file_path);
+    num_blocks = count_blocks(file_path.string());
     LOG_PRINT_L0("appending to existing file with height: " << num_blocks-1 << "  total blocks: " << num_blocks);
   }
   m_height = num_blocks;
 
   if (do_initialize_file)
-    m_raw_data_file->open(file_path, std::ios_base::binary | std::ios_base::out | std::ios::trunc);
+    m_raw_data_file->open(file_path.string(), std::ios_base::binary | std::ios_base::out | std::ios::trunc);
   else
-    m_raw_data_file->open(file_path, std::ios_base::binary | std::ios_base::out | std::ios::app | std::ios::ate);
+    m_raw_data_file->open(file_path.string(), std::ios_base::binary | std::ios_base::out | std::ios::app | std::ios::ate);
 
   if (m_raw_data_file->fail())
     return false;
@@ -286,9 +286,9 @@ bool BootstrapFile::close()
 
 
 #if SOURCE_DB == DB_MEMORY
-bool BootstrapFile::store_blockchain_raw(blockchain_storage* _blockchain_storage, tx_memory_pool* _tx_pool, boost::filesystem::path& output_dir, uint64_t requested_block_stop)
+bool BootstrapFile::store_blockchain_raw(blockchain_storage* _blockchain_storage, tx_memory_pool* _tx_pool, boost::filesystem::path& output_file, uint64_t requested_block_stop)
 #else
-bool BootstrapFile::store_blockchain_raw(Blockchain* _blockchain_storage, tx_memory_pool* _tx_pool, boost::filesystem::path& output_dir, uint64_t requested_block_stop)
+bool BootstrapFile::store_blockchain_raw(Blockchain* _blockchain_storage, tx_memory_pool* _tx_pool, boost::filesystem::path& output_file, uint64_t requested_block_stop)
 #endif
 {
   uint64_t num_blocks_written = 0;
@@ -297,7 +297,7 @@ bool BootstrapFile::store_blockchain_raw(Blockchain* _blockchain_storage, tx_mem
   m_tx_pool = _tx_pool;
   uint64_t progress_interval = 100;
   LOG_PRINT_L0("Storing blocks raw data...");
-  if (!BootstrapFile::open_writer(output_dir))
+  if (!BootstrapFile::open_writer(output_file))
   {
     LOG_PRINT_RED_L0("failed to open raw file for write");
     return false;

src/blockchain_utilities/bootstrap_file.h

@@ -81,10 +81,10 @@ public:
 
 #if SOURCE_DB == DB_MEMORY
   bool store_blockchain_raw(cryptonote::blockchain_storage* cs, cryptonote::tx_memory_pool* txp,
-      boost::filesystem::path& output_dir, uint64_t use_block_height=0);
+      boost::filesystem::path& output_file, uint64_t use_block_height=0);
 #else
   bool store_blockchain_raw(cryptonote::Blockchain* cs, cryptonote::tx_memory_pool* txp,
-      boost::filesystem::path& output_dir, uint64_t use_block_height=0);
+      boost::filesystem::path& output_file, uint64_t use_block_height=0);
 #endif
 
 protected:
@@ -102,7 +102,7 @@ protected:
   boost::iostreams::stream<boost::iostreams::back_insert_device<buffer_type>>* m_output_stream;
 
   // open export file for write
-  bool open_writer(const boost::filesystem::path& dir_path);
+  bool open_writer(const boost::filesystem::path& file_path);
   bool initialize_file();
   bool close();
   void write_block(block& block);