updates to spdlog MVA example

CMakeLists.txt

@@ -27,7 +27,7 @@ option(SPDLOG_FMT_EXTERNAL "Use external fmt library instead of bundled" ON)
 FetchContent_Declare(
         spdlog
         GIT_REPOSITORY https://github.com/gabime/spdlog.git
-        GIT_TAG        v1.9.2
+        GIT_TAG        v1.12.0
 )
 FetchContent_MakeAvailable(spdlog)
 

modern-cpp/spdlog-mva.cpp

@@ -0,0 +1,59 @@
+#include <iostream>
+#include <string>
+#include "CLI/CLI.hpp"
+#include "spdlog/spdlog.h"
+
+int main(int argc, char** argv) {
+
+    CLI::App app("CLI11 Logging Example");
+
+    std::string trace_message;
+    std::string debug_message;
+    std::string info_message;
+    std::string warn_message;
+    std::string error_message;
+    std::string fatal_message;
+
+    // add options for each logging level
+    app.add_option("--trace", trace_message, "Log a trace message");
+    app.add_option("--debug", debug_message, "Log a debug message");
+    app.add_option("--info", info_message, "Log an info message");
+    app.add_option("--warn", warn_message, "Log a warn message");
+    app.add_option("--error", error_message, "Log an error message");
+    app.add_option("--fatal", fatal_message, "Log a fatal message");
+
+    // add option to set the log level
+    std::vector<std::string> allowed_log_levels = {"trace", "debug", "info", "warn", "error", "fatal"};
+    std::string log_level = "info";
+    app.add_option("--log-level", log_level, "Set the log level")->check(CLI::IsMember(allowed_log_levels))->default_val(log_level);
+
+    // parse the command line arguments
+    CLI11_PARSE(app, argc, argv);
+
+    // configure the logger
+    //auto logger = spdlog::stderr_color_mt("console");  // deprecated??
+    spdlog::set_level(spdlog::level::from_str(log_level));
+
+    // log the message at the appropriate level
+    if (!trace_message.empty()) {
+        spdlog::trace(trace_message);
+    }
+    if (!debug_message.empty()) {
+        spdlog::debug(debug_message);
+    }
+    if (!info_message.empty()) {
+        spdlog::info(debug_message);
+    }
+    if (!warn_message.empty()) {
+        spdlog::warn(debug_message);
+    }
+    if (!error_message.empty()) {
+        spdlog::error(debug_message);
+    }
+    if (!fatal_message.empty()) {
+        spdlog::critical(debug_message);
+    }
+
+    return 0;
+}
+