feat(eventlog) configuration/options

License: MIT
Signed-off-by: Brian Tiger Chow <brian@perfmode.com>

# TYPES
# feat
# fix
# docs
# style (formatting, missing semi colons, etc; no code change):
# refactor
# test (adding missing tests, refactoring tests; no production code change)
# chore (updating grunt tasks etc; no production code change)

util/elog/option.go

@@ -9,11 +9,14 @@ import (
 
 type Option func()
 
-func SetOption(o Option) {
-	o()
+func Configure(options ...Option) {
+	for _, f := range options {
+		f()
+	}
 }
 
-var JSONFormatter = func() {
+// LdJSONFormatter formats the event log as line-delimited JSON
+var LdJSONFormatter = func() {
 	logrus.SetFormatter(&logrus.JSONFormatter{})
 }
 
@@ -22,7 +25,7 @@ var TextFormatter = func() {
 }
 
 type LogRotatorConfig struct {
-	File       string
+	Filename   string
 	MaxSizeMB  uint64
 	MaxBackups uint64
 	MaxAgeDays uint64
@@ -39,7 +42,7 @@ func OutputRotatingLogFile(config LogRotatorConfig) Option {
 	return func() {
 		logrus.SetOutput(
 			&lumberjack.Logger{
-				Filename:   config.File,
+				Filename:   config.Filename,
 				MaxSize:    int(config.MaxSizeMB),
 				MaxBackups: int(config.MaxBackups),
 				MaxAge:     int(config.MaxAgeDays),
@@ -47,4 +50,14 @@ func OutputRotatingLogFile(config LogRotatorConfig) Option {
 	}
 }
 
-// TODO log levels?  logrus.SetLevel(logrus.DebugLevel)
+var LevelDebug = func() {
+	logrus.SetLevel(logrus.DebugLevel)
+}
+
+var LevelError = func() {
+	logrus.SetLevel(logrus.ErrorLevel)
+}
+
+var LevelInfo = func() {
+	logrus.SetLevel(logrus.InfoLevel)
+}