add: version cli

Makefile

@@ -31,6 +31,6 @@ release:
 		release --clean --skip validate
 
 build:
-	go build -o ./build/price-feeder
+	go build -ldflags "-X github.com/ExocoreNetwork/price-feeder/version.Version=$(shell git describe --tags)" -o ./build/price-feeder
 
 .PHONY: build

cmd/root.go

@@ -64,5 +64,6 @@ func init() {
 	rootCmd.AddCommand(
 		startCmd,
 		debugStartCmd,
+		versionCmd,
 	)
 }

cmd/version.go

@@ -0,0 +1,21 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/ExocoreNetwork/price-feeder/version"
+	"github.com/spf13/cobra"
+)
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "display version information",
+	Long:  "display version information",
+	PersistentPreRunE: func(_ *cobra.Command, _ []string) error {
+		// do nothing here, just override persistentPreRunE defined in parent
+		return nil
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Println(version.Version)
+	},
+}

version/version.go

@@ -1,3 +1,3 @@
 package version
 
-var Name, Version, Commit string
+var Version string