log: add support for trace level, exit on critical

log/root.go

@@ -41,6 +41,11 @@ func Root() Logger {
 // etc.) to keep the call depth the same for all paths to logger.write so
 // runtime.Caller(2) always refers to the call site in client code.
 
+// Trace is a convenient alias for Root().Trace
+func Trace(msg string, ctx ...interface{}) {
+	root.write(msg, LvlTrace, ctx)
+}
+
 // Debug is a convenient alias for Root().Debug
 func Debug(msg string, ctx ...interface{}) {
 	root.write(msg, LvlDebug, ctx)
@@ -64,4 +69,5 @@ func Error(msg string, ctx ...interface{}) {
 // Crit is a convenient alias for Root().Crit
 func Crit(msg string, ctx ...interface{}) {
 	root.write(msg, LvlCrit, ctx)
+	os.Exit(1)
 }