Add 'features' command to beautify and print feature gates

Makefile

@@ -218,6 +218,10 @@ generate-mocks: $(MOCKERY)
 certs:
 	cd pkg/config/tlscfg/testdata && ./gen-certs.sh
 
+.PHONY: features
+features:
+	go run ./cmd/jaeger/features 
+
 .PHONY: certs-dryrun
 certs-dryrun:
 	cd pkg/config/tlscfg/testdata && ./gen-certs.sh -d

cmd/jaeger/features/main.go

@@ -0,0 +1,48 @@
+// Copyright (c) 2023 The Jaeger Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package main
+
+import (
+	"fmt"
+
+	"go.opentelemetry.io/collector/component"
+	"go.opentelemetry.io/collector/confmap"
+	"go.opentelemetry.io/collector/confmap/provider/envprovider"
+	"go.opentelemetry.io/collector/confmap/provider/fileprovider"
+	"go.opentelemetry.io/collector/confmap/provider/httpprovider"
+	"go.opentelemetry.io/collector/confmap/provider/httpsprovider"
+	"go.opentelemetry.io/collector/confmap/provider/yamlprovider"
+	"go.opentelemetry.io/collector/otelcol"
+
+	"github.com/jaegertracing/jaeger/cmd/jaeger/internal"
+	"github.com/jaegertracing/jaeger/pkg/version"
+)
+
+func main() {
+	info := component.BuildInfo{
+		Command:     "jaeger",
+		Description: internal.GetDescription(),
+		Version:     version.Get().GitVersion,
+	}
+
+	settings := otelcol.CollectorSettings{
+		BuildInfo: info,
+		Factories: internal.Components,
+		ConfigProviderSettings: otelcol.ConfigProviderSettings{
+			ResolverSettings: confmap.ResolverSettings{
+				ProviderFactories: []confmap.ProviderFactory{
+					envprovider.NewFactory(),
+					fileprovider.NewFactory(),
+					httpprovider.NewFactory(),
+					httpsprovider.NewFactory(),
+					yamlprovider.NewFactory(),
+				},
+			},
+		},
+	}
+
+	fmt.Println("\n" + internal.GetDescription())
+	fmt.Println("List of feature gate identifiers. Prefix with '-' to disable the feature. '+' or no prefix will enable the feature.\n ")
+	otelcol.FeatureCommand(settings)
+}

cmd/jaeger/internal/command.go

@@ -26,6 +26,10 @@ var yamlAllInOne embed.FS
 
 const description = "Jaeger backend v2"
 
+func GetDescription() string {
+	return description
+}
+
 func Command() *cobra.Command {
 	info := component.BuildInfo{
 		Command:     "jaeger",