Stable command order in help and Ad-Hoc list

telegram/commands.go

@@ -3,6 +3,7 @@ package telegram
 import (
 	"fmt"
 	"github.com/pkg/errors"
+	"sort"
 	"strconv"
 	"strings"
 	"time"
@@ -146,6 +147,21 @@ func GetCommand(typ CommandType, cmd string) (command, bool) {
 	return command, ok
 }
 
+// SortedCommandKeys sorts a slice with command keys
+func SortedCommandKeys(commandMap map[string]command) []string {
+	keys := make([]string, len(commandMap))
+
+	i := 0
+	for k := range commandMap {
+		keys[i] = k
+		i++
+	}
+
+	sort.Strings(keys)
+
+	return keys
+}
+
 // CommandToHelpString builds a text description of a command
 func CommandToHelpString(name string, cmd command) string {
 	var str strings.Builder
@@ -175,7 +191,8 @@ func helpString(typ CommandType) string {
 	commandMap := GetCommands(typ)
 
 	str.WriteString("Available commands:\n")
-	for name, command := range commandMap {
+	for _, name := range SortedCommandKeys(commandMap) {
+		command := commandMap[name]
 		str.WriteString(CommandToHelpString(name, command))
 		str.WriteString("\n")
 	}

xmpp/handlers.go

@@ -557,7 +557,8 @@ func handleGetDiscoItems(s xmpp.Sender, iq *stanza.IQ, di *stanza.DiscoItems) {
 		}
 
 		commands := telegram.GetCommands(cmdType)
-		for name, command := range commands {
+		for _, name := range telegram.SortedCommandKeys(commands) {
+			command := commands[name]
 			di.AddItem(iq.To, name, telegram.CommandToHelpString(name, command))
 		}
 	} else {