Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/outputs/loki/stream.go

@@ -0,0 +1,70 @@
+package loki
+
+import (
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/influxdata/telegraf"
+)
+
+type (
+	Log []string
+
+	Streams map[string]*Stream
+
+	Stream struct {
+		Labels map[string]string `json:"stream"`
+		Logs   []Log             `json:"values"`
+	}
+
+	Request struct {
+		Streams []Stream `json:"streams"`
+	}
+)
+
+func (s Streams) insertLog(ts []*telegraf.Tag, l Log) {
+	key := uniqKeyFromTagList(ts)
+
+	if _, ok := s[key]; !ok {
+		s[key] = newStream(ts)
+	}
+
+	s[key].Logs = append(s[key].Logs, l)
+}
+
+func (s Streams) MarshalJSON() ([]byte, error) {
+	r := Request{
+		Streams: make([]Stream, 0, len(s)),
+	}
+
+	for _, stream := range s {
+		r.Streams = append(r.Streams, *stream)
+	}
+
+	return json.Marshal(r)
+}
+
+func uniqKeyFromTagList(ts []*telegraf.Tag) (k string) {
+	for _, t := range ts {
+		k += fmt.Sprintf("%s-%s-",
+			strings.ReplaceAll(t.Key, "-", "--"),
+			strings.ReplaceAll(t.Value, "-", "--"),
+		)
+	}
+
+	return k
+}
+
+func newStream(ts []*telegraf.Tag) *Stream {
+	s := &Stream{
+		Logs:   make([]Log, 0),
+		Labels: make(map[string]string, len(ts)),
+	}
+
+	for _, t := range ts {
+		s.Labels[t.Key] = t.Value
+	}
+
+	return s
+}