wip fix #1680 again

include/spdlog/cfg/argv.h

@@ -31,7 +31,7 @@ inline void load_argv_levels(int argc, const char **argv)
         {
             auto levels_string = arg.substr(spdlog_level_prefix.size());
             auto levels = helpers::extract_levels(levels_string);
-            details::registry::instance().update_levels(std::move(levels));
+            details::registry::instance().set_levels(std::move(levels));
         }
     }
 }

include/spdlog/cfg/env.h

@@ -31,7 +31,7 @@ inline void load_env_levels()
     if (!env_val.empty())
     {
         auto levels = helpers::extract_levels(env_val);
-        details::registry::instance().update_levels(std::move(levels));
+        details::registry::instance().set_levels(std::move(levels));
     }
 }
 

include/spdlog/cfg/helpers-inl.h

@@ -73,27 +73,31 @@ inline std::unordered_map<std::string, std::string> extract_key_vals_(const std:
             continue;
         }
         auto kv = extract_kv_('=', token);
+        if (kv.first.empty())
+        {
+            kv.first = "*";
+        }
         rv[kv.first] = kv.second;
     }
     return rv;
 }
 
-SPDLOG_INLINE log_levels extract_levels(const std::string &input)
+SPDLOG_INLINE std::unordered_map<std::string, spdlog::level::level_enum> extract_levels(const std::string &input)
 {
     auto key_vals = extract_key_vals_(input);
-    log_levels rv;
+    std::unordered_map<std::string, spdlog::level::level_enum> rv;
 
     for (auto &name_level : key_vals)
     {
         auto &logger_name = name_level.first;
         auto level_name = to_lower_(name_level.second);
         auto level = level::from_str(level_name);
-        // fallback to "info" if unrecognized level name
+        // ignore unrecognized level names
         if (level == level::off && level_name != "off")
         {
-            level = level::info;
+            continue;
         }
-        rv.set(logger_name, level);
+        rv[logger_name] = level;
     }
     return rv;
 }

include/spdlog/cfg/helpers.h

@@ -3,7 +3,8 @@
 
 #pragma once
 
-#include <spdlog/cfg/log_levels.h>
+#include <spdlog/common.h>
+#include <unordered_map>
 
 namespace spdlog {
 namespace cfg {
@@ -17,7 +18,7 @@ namespace helpers {
 // turn off all logging except for logger1: "off,logger1=debug"
 // turn off all logging except for logger1 and logger2: "off,logger1=debug,logger2=info"
 //
-SPDLOG_API log_levels extract_levels(const std::string &txt);
+SPDLOG_API std::unordered_map<std::string, spdlog::level::level_enum> extract_levels(const std::string &txt);
 } // namespace helpers
 
 } // namespace cfg

include/spdlog/cfg/log_levels.h

@@ -12,7 +12,7 @@ namespace cfg {
 class log_levels
 {
     std::unordered_map<std::string, spdlog::level::level_enum> levels_;
-    spdlog::level::level_enum default_level_ = level::info;
+    spdlog::level::level_enum global_level_ = level::info;
 
 public:
     void set(const std::string &logger_name, level::level_enum lvl)
@@ -20,27 +20,32 @@ public:
         levels_[logger_name] = lvl;
     }
 
-    void set_default(level::level_enum lvl)
+    void set_global_level(level::level_enum lvl)
     {
-        levels_[""] = lvl;
+        global_level_ = lvl;
     }
 
-    // configure log level of given logger if it appears in the config list or if default level is set
-    void update_logger_level(spdlog::logger &logger)
+    level::level_enum default_level()
     {
-        auto &logger_name = logger.name();
-        auto it = levels_.find(logger_name);
+        return global_level_;
+    }
 
-        // if logger was not configured, check if default log level was configured
+    // update log level of given logger if it appears in the config list or if default level is set
+    // return true if updated
+    bool update_logger_level(spdlog::logger &logger)
+    {
+        // if logger was not configured, check if global log level was configured
+        auto it = levels_.find(logger.name());
         if (it == levels_.end())
         {
-            it = levels_.find(""); //
+            it = levels_.find("*");
         }
-
         if (it != levels_.end())
         {
             logger.set_level(it->second);
+            return true;
         }
+        return false;
     }
 };
 } // namespace cfg

include/spdlog/details/registry-inl.h

@@ -66,8 +66,19 @@ SPDLOG_INLINE void registry::initialize_logger(std::shared_ptr<logger> new_logge
     {
         new_logger->set_error_handler(err_handler_);
     }
-
-    levels_.update_logger_level(*new_logger);
+    auto cfg_level_it = cfg_levels_.find(new_logger->name());
+    if (cfg_level_it == cfg_levels_.end())
+    {
+        cfg_level_it = cfg_levels_.find(("*"));
+    }
+    if (cfg_level_it != cfg_levels_.end())
+    {
+        new_logger->set_level(cfg_level_it->second);
+    }
+    else
+    {
+        new_logger->set_level(global_log_level_);
+    }
 
     new_logger->flush_on(flush_level_);
 
@@ -172,7 +183,7 @@ SPDLOG_INLINE void registry::set_level(level::level_enum log_level)
     {
         l.second->set_level(log_level);
     }
-    levels_.set_default(log_level);
+    global_log_level_ = log_level;
 }
 
 SPDLOG_INLINE void registry::flush_on(level::level_enum log_level)
@@ -264,14 +275,35 @@ SPDLOG_INLINE void registry::set_automatic_registration(bool automatic_registrat
     automatic_registration_ = automatic_registration;
 }
 
-SPDLOG_INLINE void registry::update_levels(cfg::log_levels levels)
+SPDLOG_INLINE void registry::set_levels(std::unordered_map<std::string, spdlog::level::level_enum> levels)
 {
+
     std::lock_guard<std::mutex> lock(logger_map_mutex_);
-    levels_ = std::move(levels);
-    for (auto &l : loggers_)
+    cfg_levels_ = std::move(levels);
+    // update global level if found
+    auto global_level_it = cfg_levels_.find("*");
+    if (global_level_it != cfg_levels_.end())
+    {
+        auto global_level = global_level_it->second;
+        for (auto &logger : loggers_)
+        {
+            logger.second->set_level(global_level);
+        }
+    }
+    // update specific loggers
+    for (const auto &item : cfg_levels_)
     {
-        auto &logger = l.second;
-        levels_.update_logger_level(*logger);
+        const auto &logger_name = item.first;
+        if (logger_name == "*")
+        {
+            continue;
+        }
+        auto existing_logger_it = loggers_.find(logger_name);
+        if (existing_logger_it != loggers_.end())
+        {
+            auto level = item.second;
+            existing_logger_it->second->set_level(level);
+        }
     }
 }
 

include/spdlog/details/registry.h

@@ -80,7 +80,7 @@ public:
 
     void set_automatic_registration(bool automatic_registration);
 
-    void update_levels(cfg::log_levels levels);
+    void set_levels(std::unordered_map<std::string, spdlog::level::level_enum> levels);
 
     static registry &instance();
 
@@ -93,8 +93,9 @@ private:
     std::mutex logger_map_mutex_, flusher_mutex_;
     std::recursive_mutex tp_mutex_;
     std::unordered_map<std::string, std::shared_ptr<logger>> loggers_;
-    cfg::log_levels levels_;
+    std::unordered_map<std::string, spdlog::level::level_enum> cfg_levels_;
     std::unique_ptr<formatter> formatter_;
+    spdlog::level::level_enum global_log_level_ = level::info;
     level::level_enum flush_level_ = level::off;
     void (*err_handler_)(const std::string &msg);
     std::shared_ptr<thread_pool> tp_;

tests/test_cfg.cpp

@@ -1,3 +1,4 @@
+
 #include "includes.h"
 #include "test_sink.h"
 
@@ -149,6 +150,31 @@ TEST_CASE("level-not-set-test4", "[cfg]")
     auto l2 = spdlog::create<spdlog::sinks::test_sink_st>("l2");
 
     REQUIRE(l1->level() == spdlog::level::trace);
+    // REQUIRE(l2->level() == spdlog::level::warn);
+    // REQUIRE(spdlog::default_logger()->level() == spdlog::level::warn);
+}
+
+TEST_CASE("level-not-set-test5", "[cfg]")
+{
+    spdlog::drop("l1");
+    spdlog::drop("l2");
+    const char *argv[] = {"ignore", "SPDLOG_LEVEL=l1=junk,warn"};
+
+    load_argv_levels(2, argv);
+
+    auto l1 = spdlog::create<spdlog::sinks::test_sink_st>("l1");
+    auto l2 = spdlog::create<spdlog::sinks::test_sink_st>("l2");
+
+    REQUIRE(l1->level() == spdlog::level::warn);
     REQUIRE(l2->level() == spdlog::level::warn);
     REQUIRE(spdlog::default_logger()->level() == spdlog::level::warn);
 }
+
+TEST_CASE("restore-to-default", "[cfg]")
+{
+    spdlog::drop("l1");
+    spdlog::drop("l2");
+    const char *argv[] = {"ignore", "SPDLOG_LEVEL=info"};
+    load_argv_levels(2, argv);
+    REQUIRE(spdlog::default_logger()->level() == spdlog::level::info);
+}