refactor: store version in constants

cmd/version.go

@@ -0,0 +1,24 @@
+package cmd
+
+import (
+	"fmt"
+	"tinyauth/internal/constants"
+
+	"github.com/spf13/cobra"
+)
+
+// Create the version command
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Print the version number of Tinyauth",
+	Long:  `All software has versions. This is Tinyauth's`,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Printf("Version: %s\n", constants.Version)
+		fmt.Printf("Commit Hash: %s\n", constants.CommitHash)
+		fmt.Printf("Build Timestamp: %s\n", constants.BuildTimestamp)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}