Added helper functions

otelcol/command.go

@@ -42,6 +42,11 @@ func NewCommand(set CollectorSettings) *cobra.Command {
 	return rootCmd
 }
 
+// Helper function for "make features" commmand for Jaeger
+func FeatureCommand(set CollectorSettings)  {
+	featureflags(featuregate.GlobalRegistry())
+}
+
 // Puts command line flags from flags into the CollectorSettings, to be used during config resolution.
 func updateSettingsUsingFlags(set *CollectorSettings, flags *flag.FlagSet) error {
 	resolverSet := &set.ConfigProviderSettings.ResolverSettings

otelcol/flags.go

@@ -6,6 +6,7 @@ package otelcol // import "go.opentelemetry.io/collector/otelcol"
 import (
 	"errors"
 	"flag"
+	"fmt"
 	"strings"
 
 	"go.opentelemetry.io/collector/featuregate"
@@ -15,6 +16,10 @@ const (
 	configFlag = "config"
 )
 
+type flagValue struct {
+	reg *featuregate.Registry
+}
+
 type configFlagValue struct {
 	values []string
 	sets   []string
@@ -53,6 +58,43 @@ func flags(reg *featuregate.Registry) *flag.FlagSet {
 	return flagSet
 }
 
+// Function to beautify and print the feature flags.
+func featureflags(reg *featuregate.Registry)  {
+	f := &flagValue{reg: reg}
+	if f.reg == nil {
+		return 
+	}
+	c := 1
+
+	f.reg.VisitAll(func(g *featuregate.Gate) {
+		str := ""
+		id := g.ID()
+		desc := g.Description()
+		if !g.IsEnabled() {
+			id = "-" + id
+		}
+		str += fmt.Sprint(c) + "." + id + "\n"
+		str+= "Description: "+desc + "\n"
+		ref := g.ReferenceURL()
+		from := g.FromVersion()
+		to := g.ToVersion()
+		if(ref != ""){
+			str+= "ReferenceURL: "+desc + "\n"
+		}
+		if(from != "v<nil>"){
+			str+= "From version: "+from + "\n"
+
+		}
+		if(to != "v<nil>"){
+			str+= "From version: "+to + "\n"
+
+		}
+		// str += "\n"
+		c+=1
+		fmt.Println(str)
+	})
+}
+
 func getConfigFlag(flagSet *flag.FlagSet) []string {
 	cfv := flagSet.Lookup(configFlag).Value.(*configFlagValue)
 	return append(cfv.values, cfv.sets...)