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feat(outputs.mqtt): Add sprig for topic name generator for homie layout (#16491) 

Co-authored-by: Pieter Slabbert <pieter.slabbert@ilovezoona.com>
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Pieter Slabbert 2025-02-13 17:08:01 +02:00 committed by GitHub
parent 1b6350ac9f
commit df2926978a
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2 changed files with 4 additions and 1 deletions
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1
plugins/outputs/mqtt/README.md
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@ -201,6 +201,7 @@ while `homie_node_id` will provide a template for the `node-id` part of the
topic. Both options can contain [Go templates][GoTemplates] similar to `topic` topic. Both options can contain [Go templates][GoTemplates] similar to `topic`
with `{{ .PluginName }}` referencing the metric name and `{{ .Tag "key"}}` with `{{ .PluginName }}` referencing the metric name and `{{ .Tag "key"}}`
referencing the tag with the name `key`. referencing the tag with the name `key`.
[Sprig](http://masterminds.github.io/sprig/) helper functions are available.
For example writing the metrics For example writing the metrics

4
plugins/outputs/mqtt/homie.go
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@ -8,6 +8,8 @@ import (
"strings" "strings"
"text/template" "text/template"
"github.com/Masterminds/sprig/v3"
"github.com/influxdata/telegraf" "github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/internal" "github.com/influxdata/telegraf/internal"
) )
@ -102,7 +104,7 @@ type HomieGenerator struct {
} }
func NewHomieGenerator(tmpl string) (*HomieGenerator, error) { func NewHomieGenerator(tmpl string) (*HomieGenerator, error) {
tt, err := template.New("topic_name").Parse(tmpl) tt, err := template.New("topic_name").Funcs(sprig.TxtFuncMap()).Parse(tmpl)
if err != nil { if err != nil {
return nil, err return nil, err
} }