feat(logging): improve logging & migrate to json logger

config/logger.go

@@ -0,0 +1,54 @@
+package config
+
+import (
+	"github.com/sirupsen/logrus"
+	"gopkg.in/natefinch/lumberjack.v2"
+)
+
+// Modified "snowzach/rotatefilehook" to support manual rotation
+
+type RotateFileConfig struct {
+	Filename   string
+	MaxSize    int
+	MaxBackups int
+	MaxAge     int
+	Compress   bool
+	Level      logrus.Level
+	Formatter  logrus.Formatter
+}
+
+type RotateFileHook struct {
+	Config    RotateFileConfig
+	logWriter *lumberjack.Logger
+}
+
+func NewRotateFileHook(config RotateFileConfig) (*RotateFileHook, error) {
+	hook := RotateFileHook{
+		Config: config,
+	}
+	hook.logWriter = &lumberjack.Logger{
+		Filename:   config.Filename,
+		MaxSize:    config.MaxSize,
+		MaxBackups: config.MaxBackups,
+		MaxAge:     config.MaxAge,
+		Compress:   config.Compress,
+	}
+	return &hook, nil
+}
+
+func (hook *RotateFileHook) Rotate() error {
+	return hook.logWriter.Rotate()
+}
+
+func (hook *RotateFileHook) Levels() []logrus.Level {
+	return logrus.AllLevels[:hook.Config.Level+1]
+}
+
+func (hook *RotateFileHook) Fire(entry *logrus.Entry) (err error) {
+	b, err := hook.Config.Formatter.Format(entry)
+	if err != nil {
+		return err
+	}
+	hook.logWriter.Write(b)
+	return nil
+}