add version command

cmd/root.go

@@ -23,16 +23,16 @@ package cmd
 
 import (
 	"os"
+	"time"
 
 	"github.com/spf13/cobra"
 )
 
-// VersionInfo describes structure of version information objects.
-type VersionInfo struct {
-	Version string
-	Commit  string
-	Date    string
-}
+var (
+	version = "development"
+	commit  = "na"
+	date    = time.Now().Local().Format(time.ANSIC)
+)
 
 var rootCmd = &cobra.Command{
 	Use:   "hosts",

cmd/version.go

@@ -22,36 +22,19 @@ THE SOFTWARE.
 package cmd
 
 import (
-	"fmt"
-
 	"github.com/spf13/cobra"
 )
 
 // versionCmd represents the version command
 var versionCmd = &cobra.Command{
 	Use:   "version",
-	Short: "A brief description of your command",
-	Long: `A longer description that spans multiple lines and likely contains examples
-and usage of using your command. For example:
-
-Cobra is a CLI library for Go that empowers applications.
-This application is a tool to generate the needed files
-to quickly create a Cobra application.`,
+	Short: "Print CLI version information",
+	Long:  `Print CLI version information.`,
 	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Println("version called")
+		cmd.Printf("Hosts CLI Version %s built on %s (commit: %s)\n", version, date, commit)
 	},
 }
 
 func init() {
 	rootCmd.AddCommand(versionCmd)
-
-	// Here you will define your flags and configuration settings.
-
-	// Cobra supports Persistent Flags which will work for this command
-	// and all subcommands, e.g.:
-	// versionCmd.PersistentFlags().String("foo", "", "A help for foo")
-
-	// Cobra supports local flags which will only run when this command
-	// is called directly, e.g.:
-	// versionCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 }