- added the ability to set the default global severity from scons configure

- initial check in of setting global severity from getenv (todo)

SConstruct

@@ -348,6 +348,7 @@ opts.AddVariables(
     BoolVariable('ENABLE_LOG', 'Enable logging, which is enabled by default when building in *debug*', 'False'),
     BoolVariable('ENABLE_STATS', 'Enable global statistics during map processing', 'False'),
     ('LOG_FORMAT_STRING', 'The format string used before log output string, piped through strftime (max length of 255 characters)', 'Mapnik LOG> %Y-%m-%d %H:%M:%S:'),
+    ('DEFAULT_LOG_SEVERITY', 'The default severity of the logger (eg. "info", "debug", "warn", "error", "fatal", "none")', 'error'),
 
     # Other variables
     BoolVariable('SHAPE_MEMORY_MAPPED_FILE', 'Utilize memory-mapped files in Shapefile Plugin (higher memory usage, better performance)', 'True'),
@@ -1417,7 +1418,20 @@ if not preconfigured:
         ndebug_flags = '-DNDEBUG'
 
         # Enable logging in debug mode (always) and release mode (when specified)
-        log_enabled = ' -DMAPNIK_LOG -DMAPNIK_LOG_FORMAT="%s"' % env['LOG_FORMAT_STRING']
+        if env['DEFAULT_LOG_SEVERITY']:
+            severities = ['info', 'debug', 'warn', 'error', 'fatal', 'none']
+            if env['DEFAULT_LOG_SEVERITY'] not in severities:
+                color_print(1,"Cannot set default logger severity to '%s', available options are 'info', 'debug', 'warn', 'error', 'fatal', 'none'." % env['DEFAULT_LOG_SEVERITY'])
+                Exit(1)
+            else:
+                log_severity = severities.index(env['DEFAULT_LOG_SEVERITY'])
+        else:
+            if env['DEBUG']:
+                log_severity = 1 # debug
+            else:
+                log_severity = 3 # error
+
+        log_enabled = ' -DMAPNIK_LOG -DMAPNIK_LOG_FORMAT="%s" -DMAPNIK_DEFAULT_LOG_SEVERITY=%d' % (env['LOG_FORMAT_STRING'], log_severity)
 
         if env['DEBUG']:
             debug_flags += log_enabled

include/mapnik/debug.hpp

@@ -125,6 +125,7 @@ namespace mapnik {
             format_ = format;
         }
 
+        // interpolate the format string for output
         static std::string str();
 
         // output
@@ -134,7 +135,11 @@ namespace mapnik {
     private:
         static severity_type severity_level_;
         static severity_map object_severity_level_;
+        static bool severity_env_check_;
+
         static std::string format_;
+        static bool format_env_check_;
+
         static std::ofstream file_output_;
         static std::string file_name_;
         static std::streambuf* saved_buf_;

src/debug.cpp

@@ -30,21 +30,47 @@
 #define MAPNIK_LOG_FORMAT "Mapnik LOG> %Y-%m-%d %H:%M:%S:"
 #endif
 
+#ifndef MAPNIK_DEFAULT_LOG_SEVERITY
+  #ifdef MAPNIK_DEBUG
+    #define MAPNIK_DEFAULT_LOG_SEVERITY 1
+  #else
+    #define MAPNIK_DEFAULT_LOG_SEVERITY 3
+  #endif
+#endif
+
 namespace mapnik {
 
+// mutexes
+
 #ifdef MAPNIK_THREADSAFE
 boost::mutex logger::severity_mutex_;
 boost::mutex logger::format_mutex_;
 #endif
 
 
+// first time checks
+
+bool logger::severity_env_check_ = true;
+bool logger::format_env_check_ = true;
+
+
 // severity
 
 logger::severity_type logger::severity_level_ =
-#ifdef MAPNIK_DEBUG
+    #if MAPNIK_DEFAULT_LOG_SEVERITY == 0
+        logger::info
+    #elif MAPNIK_DEFAULT_LOG_SEVERITY == 1
         logger::debug
-#else
+    #elif MAPNIK_DEFAULT_LOG_SEVERITY == 2
+        logger::warn
+    #elif MAPNIK_DEFAULT_LOG_SEVERITY == 3
         logger::error
+    #elif MAPNIK_DEFAULT_LOG_SEVERITY == 4
+        logger::fatal
+    #elif MAPNIK_DEFAULT_LOG_SEVERITY == 5
+        logger::none
+    #else
+        #error "Wrong default log severity level specified!"
     #endif
 ;
 
@@ -61,6 +87,20 @@ std::string logger::format_ = __xstr__(MAPNIK_LOG_FORMAT);
 
 std::string logger::str()
 {
+#if 0
+    // update the format from getenv if this is the first time
+    if (logger::format_env_check_)
+    {
+        logger::format_env_check_ = false;
+
+        const char* log_format = getenv("MAPNIK_LOG_FORMAT");
+        if (log_format != NULL)
+        {
+            logger::format_ = log_format;
+        }
+    }
+#endif
+
     char buf[256];
     const time_t tm = time(0);
     strftime(buf, sizeof(buf), logger::format_.c_str(), localtime(&tm));