use spdlog

monitarr/monitarr/main.cpp

@@ -13,10 +13,71 @@
 #include "settings.hpp"
 #include "show_cmd.hpp"
 #include "usage_cmd.hpp"
+#include "utils/common.hpp"
 #include "utils/file.hpp"
+#include "utils/path.hpp"
+#include "utils/unix.hpp"
+#include "utils/windows.hpp"
 
 using namespace monitarr;
 
+static constexpr const std::uint8_t MAX_LOG_FILES{5U};
+static constexpr const std::uint64_t MAX_LOG_FILE_SIZE{
+    1024ULL * 1024ULL * 5ULL,
+};
+
+struct monitarr_exception_handler final
+    : public utils::error::i_exception_handler {
+  void handle_debug(std::string_view function_name,
+                    std::string_view msg) const override {
+    spdlog::get("file")->debug(
+        utils::error::create_error_message(function_name, {msg}));
+  }
+
+  void handle_error(std::string_view function_name,
+                    std::string_view msg) const override {
+    spdlog::get("file")->error(
+        utils::error::create_error_message(function_name, {msg}));
+  }
+
+  void handle_exception(std::string_view function_name) const override {
+    spdlog::get("file")->error(utils::error::create_error_message(
+        function_name, {
+                           "exception",
+                           "unknown exception",
+                       }));
+  }
+
+  void handle_exception(std::string_view function_name,
+                        const std::exception &ex) const override {
+    spdlog::get("file")->error(utils::error::create_error_message(
+        function_name, {
+                           "exception",
+                           (ex.what() == nullptr ? "unknown" : ex.what()),
+                       }));
+  }
+
+  void handle_info(std::string_view function_name,
+                   std::string_view msg) const override {
+    spdlog::get("file")->info(
+        utils::error::create_error_message(function_name, {msg}));
+  }
+
+  void handle_trace(std::string_view function_name,
+                    std::string_view msg) const override {
+    spdlog::get("file")->trace(
+        utils::error::create_error_message(function_name, {msg}));
+  }
+
+  void handle_warn(std::string_view function_name,
+                   std::string_view msg) const override {
+    spdlog::get("file")->warn(
+        utils::error::create_error_message(function_name, {msg}));
+  }
+};
+
+static const monitarr_exception_handler handler{};
+
 auto main(int argc, char **argv) -> int {
   MONITARR_USES_FUNCTION_NAME();
 
@@ -27,9 +88,28 @@ auto main(int argc, char **argv) -> int {
   if (not utils::file::change_to_process_directory()) {
     utils::error::handle_error(function_name,
                                "failed to change to process directory");
-    return 1;
+    return -1;
   }
 
+  auto log_dir = utils::get_environment_variable("MONITARR_LOG_DIR");
+  if (log_dir.empty()) {
+    log_dir = utils::path::combine(".", {"logs"});
+  }
+
+  if (not utils::file::directory{log_dir}.create_directory()) {
+    utils::error::handle_error(
+        function_name, fmt::format("failed to create log dir|{}|{}", log_dir,
+                                   utils::get_last_error_code()));
+    return -1;
+  }
+
+  spdlog::drop("file");
+  spdlog::create_async<spdlog::sinks::rotating_file_sink_mt>(
+      "file", utils::path::combine(log_dir, {"monitarr.log"}),
+      MAX_LOG_FILE_SIZE, MAX_LOG_FILES);
+
+  utils::error::set_exception_handler(&handler);
+
   if (not monitarr::project_initialize()) {
     return -1;
   }
@@ -71,5 +151,7 @@ auto main(int argc, char **argv) -> int {
   }
 
   monitarr::project_cleanup();
+
+  utils::error::set_exception_handler(nullptr);
   return ret;
 }