refactor(logger): Cleanup

include/components/logger.hpp

@@ -16,18 +16,16 @@ enum class loglevel : uint8_t {
   TRACE,
 };
 
-loglevel parse_loglevel_name(const string& name);
-
 class logger {
  public:
   using make_type = const logger&;
   static make_type make(loglevel level = loglevel::NONE);
 
   explicit logger(loglevel level);
-  explicit logger(string level_name) : logger(parse_loglevel_name(level_name)) {}
 
-  void verbosity(loglevel level);
-  void verbosity(string level);
+  static loglevel parse_verbosity(const string& name, loglevel fallback = loglevel::NONE);
+
+  void verbosity(loglevel&& level);
 
 #ifdef DEBUG_LOGGER  // {{{
   template <typename... Args>

src/components/logger.cpp

@@ -11,8 +11,12 @@ POLYBAR_NS
  * Create instance
  */
 logger::make_type logger::make(loglevel level) {
-  auto instance = factory_util::singleton<const logger>(level);
-  return static_cast<const logger&>(*instance);
+#ifndef DEBUG
+  if (level == loglevel::TRACE) {
+    throw application_error("not a debug build: trace disabled...");
+  }
+#endif
+  return static_cast<const logger&>(*factory_util::singleton<const logger>(level));
 }
 
 /**
@@ -45,26 +49,19 @@ logger::logger(loglevel level) : m_level(level) {
 /**
  * Set output verbosity
  */
-void logger::verbosity(loglevel level) {
+void logger::verbosity(loglevel&& level) {
 #ifndef DEBUG
   if (level == loglevel::TRACE) {
-    throw application_error("not a debug build: trace disabled...");
+    throw application_error("Not a debug build; trace disabled...");
   }
 #endif
-  m_level = level;
-}
-
-/**
- * Set output verbosity by loglevel name
- */
-void logger::verbosity(string level) {
-  verbosity(parse_loglevel_name(move(level)));
+  m_level = forward<decltype(level)>(level);
 }
 
 /**
  * Convert given loglevel name to its enum type counterpart
  */
-loglevel parse_loglevel_name(const string& name) {
+loglevel logger::parse_verbosity(const string& name, loglevel fallback) {
   if (string_util::compare(name, "error")) {
     return loglevel::ERROR;
   } else if (string_util::compare(name, "warning")) {
@@ -74,7 +71,7 @@ loglevel parse_loglevel_name(const string& name) {
   } else if (string_util::compare(name, "trace")) {
     return loglevel::TRACE;
   } else {
-    return loglevel::NONE;
+    return fallback;
   }
 }
 

src/main.cpp

@@ -22,9 +22,9 @@ struct exit_failure {};
 int main(int argc, char** argv) {
   // clang-format off
   const command_line::options opts{
-    command_line::option{"-h", "--help", "Show help options"},
+      command_line::option{"-h", "--help", "Show help options"},
       command_line::option{"-v", "--version", "Print version information"},
-      command_line::option{"-l", "--log", "Set the logging verbosity (default: WARNING)", "LEVEL", {"warning", "info", "trace"}},
+      command_line::option{"-l", "--log", "Set the logging verbosity (default: WARNING)", "LEVEL", {"error", "warning", "info", "trace"}},
       command_line::option{"-q", "--quiet", "Be quiet (will override -l)"},
       command_line::option{"-c", "--config", "Path to the configuration file", "FILE"},
       command_line::option{"-r", "--reload", "Reload when the configuration has been modified"},
@@ -37,7 +37,7 @@ int main(int argc, char** argv) {
   uint8_t exit_code{EXIT_SUCCESS};
   bool reload{false};
 
-  logger& logger{const_cast<class logger&>(logger::make(loglevel::WARNING))};
+  logger& logger{const_cast<decltype(logger)>(logger::make(loglevel::WARNING))};
 
   try {
     //==================================================
@@ -77,7 +77,7 @@ int main(int argc, char** argv) {
     if (cli->has("quiet")) {
       logger.verbosity(loglevel::ERROR);
     } else if (cli->has("log")) {
-      logger.verbosity(cli->get("log"));
+      logger.verbosity(logger::parse_verbosity(cli->get("log")));
     }
 
     if (cli->has("help")) {