nixos/installer: Use -n instead of ! -z

See <https://github.com/koalaman/shellcheck/wiki/SC2236>.
2021-11-26 18:55:53 +13:00 · 2021-11-26 18:55:53 +13:00 · c9a7385997
parent adb8f5c858
commit c9a7385997
1 changed files with 1 additions and 1 deletions
--- a/nixos/modules/installer/tools/nixos-build-vms/nixos-build-vms.sh
+++ b/nixos/modules/installer/tools/nixos-build-vms/nixos-build-vms.sh
@ -30,7 +30,7 @@ while [ $# -gt 0 ]; do
        nixBuildArgs+=("--option" "$1" "$2"); shift
        ;;
      *)
-        if [ ! -z "$networkExpr" ]; then
+        if [ -n "$networkExpr" ]; then
          echo "Network expression already set!"
          showUsage
          exit 1