refactor: Rewrote in golang.

cmd/version.go

@@ -0,0 +1,35 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	version = "dev"
+	commit  = "none"
+	date    = "unknown"
+)
+
+var long bool
+
+// versionCmd represents the version command
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Show envr's version",
+	Run: func(cmd *cobra.Command, args []string) {
+		if long {
+			fmt.Printf("envr version %s\n", version)
+			fmt.Printf("commit: %s\n", commit)
+			fmt.Printf("built: %s\n", date)
+		} else {
+			fmt.Printf("%s\n", version)
+		}
+	},
+}
+
+func init() {
+	versionCmd.Flags().BoolVarP(&long, "long", "l", false, "Show all version information")
+	rootCmd.AddCommand(versionCmd)
+}