feat: tmpo [-v | --version | version] Command

cmd/root.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"fmt"
 	"os"
 
 	"github.com/spf13/cobra"
@@ -31,8 +30,5 @@ func Execute() {
 }
 
 func init() {
-	rootCmd.SetVersionTemplate(fmt.Sprintf(
-		"tmpo version %s\ncommit: %s\nbuilt: %s\n",
-		Version, Commit, Date,
-	))
+	rootCmd.SetVersionTemplate(GetVersionOutput())
 }

cmd/version.go

@@ -0,0 +1,57 @@
+package cmd
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+)
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: "Show version information",
+	Long:  "Display the current version information including date and release URL.",
+	Hidden: true,
+	Run: func(cmd *cobra.Command, args []string) {
+		fmt.Print(GetVersionOutput())
+	},
+}
+
+// GetVersionOutput returns the formatted version string used by both
+// the version subcommand and the -v/--version flags
+func GetVersionOutput() string {
+	return fmt.Sprintf("\ntmpo version %s %s\n%s\n\n", Version, GetFormattedDate(Date), GetChangelogUrl(Version))
+}
+
+// GetFormattedDate parses inputDate as an RFC3339 timestamp and returns the date
+// formatted as "YYYY-MM-DD" wrapped in parentheses (for example "(2006-01-02)").
+// If inputDate is empty or cannot be parsed as RFC3339, it returns an empty string.
+func GetFormattedDate(inputDate string) string {
+	if inputDate == "" {
+		return ""
+	}
+
+	date, err := time.Parse(time.RFC3339, inputDate)
+	if err != nil {
+		return ""
+	}
+
+	return fmt.Sprintf("(%s)", date.Format("2006-01-02"))
+}
+
+func GetChangelogUrl(version string) string {
+	path := "https://github.com/DylanDevelops/tmpo"
+
+	r := regexp.MustCompile(`^v?\d+\.\d+\.\d+(-[\w.]+)?$`)
+	if !r.MatchString(version) {
+		return fmt.Sprintf("%s/releases/latest", path)
+	}
+
+	return fmt.Sprintf("%s/releases/tag/v%s", path, strings.TrimPrefix(version, "v"))
+}
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}