feat: add versioning (#14)

Makefile

@@ -1,8 +1,11 @@
+VERSION := $(shell echo $(shell git describe --tags) | sed 's/^v//')
+LDFLAGS = -X main.version=${VERSION}
+
 build:
-	go build cmd/cosmos-node-exporter.go
+	go build -ldflags '$(LDFLAGS)' cmd/cosmos-node-exporter.go
 
 install:
-	go install cmd/cosmos-node-exporter.go
+	go install -ldflags '$(LDFLAGS)' cmd/cosmos-node-exporter.go
 
 lint:
-	golangci-lint run --fix ./...
+	golangci-lint run --fix ./...

cmd/cosmos-node-exporter.go

@@ -9,6 +9,10 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var (
+	version = "unknown"
+)
+
 func Execute(configPath string) {
 	appConfig, err := config.GetConfig(configPath)
 	if err != nil {
@@ -37,8 +41,9 @@ func main() {
 	var ConfigPath string
 
 	rootCmd := &cobra.Command{
-		Use:  "cosmos-node-exporter",
-		Long: "Scrapes validators info on multiple chains.",
+		Use:     "cosmos-node-exporter",
+		Long:    "A Prometheus scraper to return data about fullnode sync status and present upgrades.",
+		Version: version,
 		Run: func(cmd *cobra.Command, args []string) {
 			Execute(ConfigPath)
 		},