Error on empty Package list

1 files changed, 9 insertions, 2 deletions

diff --git a/pkgsync-ng-nt b/pkgsync-ng-nt
index e7a40a5..d8c8d8f 100755
--- a/pkgsync-ng-nt
+++ b/pkgsync-ng-nt
@@ -47,6 +47,13 @@ if [ "$OLD_VERSION" -ge "$NEW_VERSION" ]; then
 	exit 0
 fi
 
+DO_INSTALL="$(< /etc/packages.yaml yq -r '.install | to_entries | map(.value) | add | map(tostring) | join(", ")')"
+if [ -z "$DO_INSTALL" ]; then
+	printf "Package List was empty. Refusing operation for fear of malformed configuration."
+	exit 1
+fi
+DONT_INSTALL="$(< /etc/packages.yaml yq -r '.remove  | to_entries | map(.value) | add | map(tostring) | join(", ")')"
+
 cat > "$PACKAGE_NAME" << EOF
 Section: misc
 Priority: optional
@@ -54,8 +61,8 @@ Standards-Version: 3.9.2
 
 Package:     $PACKAGE_NAME
 Version:     $NEW_VERSION
-Depends:     $(< /etc/packages.yaml yq -r '.install | to_entries | map(.value) | add | map(tostring) | join(", ")'), apt, coreutils, equivs, findutils, yq
-Conflicts:   $(< /etc/packages.yaml yq -r '.remove  | to_entries | map(.value) | add | map(tostring) | join(", ")')
+Depends:     $DO_INSTALL, apt, coreutils, equivs, findutils, yq
+Conflicts:   $DONT_INSTALL
 Description: Metapackage for all needed packages.
   This is a dummy package, depending on other packages to make Package Management easier.
 EOF