add logger (unused yet)

Author: Tofel

wasp/benchspy/log.go

@@ -0,0 +1,32 @@
+package benchspy
+
+import (
+	"os"
+
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+const (
+	LogLevelEnvVar = "BENCHSPY_LOG_LEVEL"
+)
+
+var (
+	L zerolog.Logger
+)
+
+func init() {
+	initDefaultLogging()
+}
+
+func initDefaultLogging() {
+	lvlStr := os.Getenv(LogLevelEnvVar)
+	if lvlStr == "" {
+		lvlStr = "info"
+	}
+	lvl, err := zerolog.ParseLevel(lvlStr)
+	if err != nil {
+		panic(err)
+	}
+	L = log.Output(zerolog.ConsoleWriter{Out: os.Stderr}).Level(lvl)
+}