fix: improve apk packager

apk/apk.go

@@ -38,6 +38,7 @@ import (
 	"io"
 	"net/mail"
 	"os"
+	"sort"
 	"strings"
 	"sync/atomic"
 	"text/template"
@@ -343,18 +344,21 @@ func createBuilderControl(info *nfpm.Info, size int64, dataDigest []byte) func(t
 		// bin/echo 'running preinstall.sh' // do stuff here
 		//
 		// exit 0
-		for script, dest := range map[string]string{
-			info.Scripts.PreInstall:      ".pre-install",
-			info.APK.Scripts.PreUpgrade:  ".pre-upgrade",
-			info.Scripts.PostInstall:     ".post-install",
-			info.APK.Scripts.PostUpgrade: ".post-upgrade",
-			info.Scripts.PreRemove:       ".pre-deinstall",
-			info.Scripts.PostRemove:      ".post-deinstall",
-		} {
-			if script != "" {
-				if err := newScriptInsideTarGz(tw, script, dest); err != nil {
-					return err
-				}
+		scripts := map[string]string{
+			".pre-install":    info.Scripts.PreInstall,
+			".pre-upgrade":    info.APK.Scripts.PreUpgrade,
+			".post-install":   info.Scripts.PostInstall,
+			".post-upgrade":   info.APK.Scripts.PostUpgrade,
+			".pre-deinstall":  info.Scripts.PreRemove,
+			".post-deinstall": info.Scripts.PostRemove,
+		}
+		for _, name := range keys(scripts) {
+			path := scripts[name]
+			if path == "" {
+				continue
+			}
+			if err := newScriptInsideTarGz(tw, path, name); err != nil {
+				return err
 			}
 		}
 
@@ -508,3 +512,12 @@ func writeControl(w io.Writer, data controlData) error {
 	})
 	return template.Must(tmpl.Parse(controlTemplate)).Execute(w, data)
 }
+
+func keys(m map[string]string) []string {
+	keys := make([]string, 0, len(m))
+	for key := range m {
+		keys = append(keys, key)
+	}
+	sort.Strings(keys)
+	return keys
+}