Change logging to easylogging++

This replaces the epee and data_loggers logging systems with
a single one, and also adds filename:line and explicit severity
levels. Categories may be defined, and logging severity set
by category (or set of categories). epee style 0-4 log level
maps to a sensible severity configuration. Log files now also
rotate when reaching 100 MB.

To select which logs to output, use the MONERO_LOGS environment
variable, with a comma separated list of categories (globs are
supported), with their requested severity level after a colon.
If a log matches more than one such setting, the last one in
the configuration string applies. A few examples:

This one is (mostly) silent, only outputting fatal errors:

MONERO_LOGS=*:FATAL

This one is very verbose:

MONERO_LOGS=*:TRACE

This one is totally silent (logwise):

MONERO_LOGS=""

This one outputs all errors and warnings, except for the
"verify" category, which prints just fatal errors (the verify
category is used for logs about incoming transactions and
blocks, and it is expected that some/many will fail to verify,
hence we don't want the spam):

MONERO_LOGS=*:WARNING,verify:FATAL

Log levels are, in decreasing order of priority:
FATAL, ERROR, WARNING, INFO, DEBUG, TRACE

Subcategories may be added using prefixes and globs. This
example will output net.p2p logs at the TRACE level, but all
other net* logs only at INFO:

MONERO_LOGS=*:ERROR,net*:INFO,net.p2p:TRACE

Logs which are intended for the user (which Monero was using
a lot through epee, but really isn't a nice way to go things)
should use the "global" category. There are a few helper macros
for using this category, eg: MGINFO("this shows up by default")
or MGINFO_RED("this is red"), to try to keep a similar look
and feel for now.

Existing epee log macros still exist, and map to the new log
levels, but since they're used as a "user facing" UI element
as much as a logging system, they often don't map well to log
severities (ie, a log level 0 log may be an error, or may be
something we want the user to see, such as an important info).
In those cases, I tried to use the new macros. In other cases,
I left the existing macros in. When modifying logs, it is
probably best to switch to the new macros with explicit levels.

The --log-level options and set_log commands now also accept
category settings, in addition to the epee style log levels.

1 files changed, 10 insertions, 7 deletions

diff --git a/src/daemon/rpc.h b/src/daemon/rpc.h
index bfd2afd84..8b0d5808d 100644
--- a/src/daemon/rpc.h
+++ b/src/daemon/rpc.h
@@ -32,6 +32,9 @@
 
 #include "rpc/core_rpc_server.h"
 
+#undef MONERO_DEFAULT_LOG_CATEGORY
+#define MONERO_DEFAULT_LOG_CATEGORY "daemon"
+
 namespace daemonize
 {
 
@@ -52,27 +55,27 @@ public:
     )
     : m_server{core.get(), p2p.get()}
   {
-    LOG_PRINT_L0("Initializing core rpc server...");
+    MGINFO("Initializing core rpc server...");
     if (!m_server.init(vm))
     {
       throw std::runtime_error("Failed to initialize core rpc server.");
     }
-    LOG_PRINT_GREEN("Core rpc server initialized OK on port: " << m_server.get_binded_port(), LOG_LEVEL_0);
+    MGINFO("Core rpc server initialized OK on port: " << m_server.get_binded_port());
   }
 
   void run()
   {
-    LOG_PRINT_L0("Starting core rpc server...");
+    MGINFO("Starting core rpc server...");
     if (!m_server.run(2, false))
     {
       throw std::runtime_error("Failed to start core rpc server.");
     }
-    LOG_PRINT_L0("Core rpc server started ok");
+    MGINFO("Core rpc server started ok");
   }
 
   void stop()
   {
-    LOG_PRINT_L0("Stopping core rpc server...");
+    MGINFO("Stopping core rpc server...");
     m_server.send_stop_signal();
     m_server.timed_wait_server_stop(5000);
   }
@@ -84,11 +87,11 @@ public:
 
   ~t_rpc()
   {
-    LOG_PRINT_L0("Deinitializing rpc server...");
+    MGINFO("Deinitializing rpc server...");
     try {
       m_server.deinit();
     } catch (...) {
-      LOG_PRINT_L0("Failed to deinitialize rpc server...");
+      MERROR("Failed to deinitialize rpc server...");
     }
   }
 };