add version tag to ping response

internal/commands/ping.go

@@ -10,7 +10,9 @@ import (
 func Ping() string {
 	botUptime := humanize.Time(common.GetUptime())
 	commandsUsed := common.GetCommandsUsed()
+	commit := common.GetVersion()
+
+	reply := fmt.Sprintf("Pong! :) Commands used: %v, Last restart: %v, Running on commit: %v", commandsUsed, botUptime, commit)
 
-	reply := fmt.Sprintf("Pong! :) Commands used: %v, Last restart: %v", commandsUsed, botUptime)
 	return reply
 }

internal/common/version.go

@@ -0,0 +1,43 @@
+// File pretty much completely stolen from a generated
+// Autostrada project I used a while ago. They don't
+// require attribution but I still want to give them
+// credit for their amazing project.
+// https://autostrada.dev/
+
+package common
+
+import (
+	"fmt"
+	"runtime/debug"
+)
+
+func GetVersion() string {
+	var revision string
+	var modified bool
+
+	bi, ok := debug.ReadBuildInfo()
+	if ok {
+		for _, s := range bi.Settings {
+			switch s.Key {
+			case "vcs.revision":
+				revision = s.Value
+			case "vcs.modified":
+				if s.Value == "true" {
+					modified = true
+				}
+			}
+		}
+	}
+
+	if revision == "" {
+		return "unavailable"
+	}
+
+	if modified {
+		return fmt.Sprintf("%s-dirty", revision)
+	}
+
+	fmt.Println(revision)
+
+	return revision
+}