Adding upstream version 1.34.4.

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

plugins/processors/regex/regex.go

@@ -0,0 +1,105 @@
+//go:generate ../../../tools/readme_config_includer/generator
+package regex
+
+import (
+	_ "embed"
+	"fmt"
+
+	"github.com/influxdata/telegraf"
+	"github.com/influxdata/telegraf/plugins/processors"
+)
+
+//go:embed sample.conf
+var sampleConfig string
+
+type Regex struct {
+	Tags         []converter     `toml:"tags"`
+	Fields       []converter     `toml:"fields"`
+	TagRename    []converter     `toml:"tag_rename"`
+	FieldRename  []converter     `toml:"field_rename"`
+	MetricRename []converter     `toml:"metric_rename"`
+	Log          telegraf.Logger `toml:"-"`
+}
+
+func (*Regex) SampleConfig() string {
+	return sampleConfig
+}
+
+func (r *Regex) Init() error {
+	// Compile the regular expressions
+	for i := range r.Tags {
+		if err := r.Tags[i].setup(convertTags, r.Log); err != nil {
+			return fmt.Errorf("'tags' %w", err)
+		}
+	}
+	for i := range r.Fields {
+		if err := r.Fields[i].setup(convertFields, r.Log); err != nil {
+			return fmt.Errorf("'fields' %w", err)
+		}
+	}
+
+	for i, c := range r.TagRename {
+		if c.Key != "" {
+			r.Log.Info("'tag_rename' section contains a key which is ignored during processing")
+		}
+		if err := r.TagRename[i].setup(convertTagRename, r.Log); err != nil {
+			return fmt.Errorf("'tag_rename' %w", err)
+		}
+	}
+
+	for i, c := range r.FieldRename {
+		if c.Key != "" {
+			r.Log.Info("'field_rename' section contains a key which is ignored during processing")
+		}
+
+		if err := r.FieldRename[i].setup(convertFieldRename, r.Log); err != nil {
+			return fmt.Errorf("'field_rename' %w", err)
+		}
+	}
+
+	for i, c := range r.MetricRename {
+		if c.Key != "" {
+			r.Log.Info("'metric_rename' section contains a key which is ignored during processing")
+		}
+
+		if c.ResultKey != "" {
+			r.Log.Info("'metric_rename' section contains a 'result_key' ignored during processing as metrics will ALWAYS the name")
+		}
+
+		if err := r.MetricRename[i].setup(convertMetricRename, r.Log); err != nil {
+			return fmt.Errorf("'metric_rename' %w", err)
+		}
+	}
+
+	return nil
+}
+
+func (r *Regex) Apply(in ...telegraf.Metric) []telegraf.Metric {
+	for _, metric := range in {
+		for _, c := range r.Tags {
+			c.apply(metric)
+		}
+
+		for _, c := range r.Fields {
+			c.apply(metric)
+		}
+
+		for _, c := range r.TagRename {
+			c.apply(metric)
+		}
+
+		for _, c := range r.FieldRename {
+			c.apply(metric)
+		}
+
+		for _, c := range r.MetricRename {
+			c.apply(metric)
+		}
+	}
+
+	return in
+}
+
+func init() {
+	processors.Add("regex", func() telegraf.Processor { return &Regex{} })
+}