fix packaging ownership for Unraid

build-plugin.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
 set -eu
 
+# Keine macOS-Metadaten oder lokale UID 501 in das Unraid-Paket übernehmen.
+export COPYFILE_DISABLE=1
+
 PLUGIN="u-navigator"
 VERSION="2026.07.14.r017"
 PKG_DIR="packages"
@@ -15,7 +18,15 @@ cp server/public/app.js "$WORK_DIR/usr/local/emhttp/plugins/${PLUGIN}/assets/app
 cp server/public/styles.css "$WORK_DIR/usr/local/emhttp/plugins/${PLUGIN}/assets/styles.css"
 perl -0pi -e "s/__VERSION__/${VERSION}/g" "$WORK_DIR/usr/local/emhttp/plugins/${PLUGIN}/U-Navigator.page"
 
-tar -czf "$PKG_DIR/$PKG_NAME" -C "$WORK_DIR" usr
+find "$WORK_DIR" -name '._*' -delete
+if tar --version 2>/dev/null | grep -q 'GNU tar'; then
+    TAR_OWNER_FLAGS="--owner=0 --group=0 --numeric-owner"
+else
+    TAR_OWNER_FLAGS="--uid 0 --gid 0 --uname root --gname root"
+fi
+# Die Argumente sind feste, intern definierte tar-Flags.
+# shellcheck disable=SC2086
+tar --no-xattrs $TAR_OWNER_FLAGS -czf "$PKG_DIR/$PKG_NAME" -C "$WORK_DIR" usr
 rm -rf "$WORK_DIR"
 
 MD5="$(md5 -q "$PKG_DIR/$PKG_NAME" 2>/dev/null || md5sum "$PKG_DIR/$PKG_NAME" | awk '{print $1}')"