[log] Tracker

[at15]

Not scheduled

• we can't config third party library that is using the log package
  • this is allowed in Java land, i.e. solr's admin page allow you to config all the package's logging level on the fly)
  • maybe the logger should register itself to a singleton

Working

• v2 with better support for field and performance [Partial] Log v2 switch to handler and introduce hierarchy #28
  • survey for zap, zerolog, nanolog [log][survey] Popular logger in Go #26

Finished

• [log] Add log config struct #16 set color is not supported in formatter interface, so does time format
• First class support for package in logger and entries #22 first class support for package, allow config log level for individual log entry
• [log] Add config for log filtering #3 pkg filter should also be considered

[at15]

we have log entries registered in logger, the problem is, each library use their own logger instance, unless they all use a DefaultLogger or make their logger public, there is no way to control their logging

[at15]

fixed in #90