refactor(eventlog) use polite formatter as a direct dependency

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

util/eventlog/option.go

@@ -17,7 +17,7 @@ func Configure(options ...Option) {
 
 // LdJSONFormatter formats the event log as line-delimited JSON
 var LdJSONFormatter = func() {
-	logrus.SetFormatter(&logrus.PoliteJSONFormatter{})
+	logrus.SetFormatter(&PoliteJSONFormatter{})
 }
 
 var TextFormatter = func() {

util/eventlog/polite_json_formatter.go

+package eventlog
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/maybebtc/logrus"
+)
+
+type PoliteJSONFormatter struct{}
+
+func (f *PoliteJSONFormatter) Format(entry *logrus.Entry) ([]byte, error) {
+	serialized, err := json.Marshal(entry.Data)
+	if err != nil {
+		return nil, fmt.Errorf("Failed to marshal fields to JSON, %v", err)
+	}
+	return append(serialized, '\n'), nil
+}