entry deletion now creates a backup and informs notifies on problems

info.plist

@@ -1386,9 +1386,9 @@ echo -n $dummyBib | pandoc --citeproc --read=markdown --write=plain --csl $csl -
 				<key>removeextension</key>
 				<false/>
 				<key>text</key>
-				<string>@{query}</string>
+				<string>{query}</string>
 				<key>title</key>
-				<string>✅ Entry deleted from BibTeX Library</string>
+				<string>✅ {var:citekey} deleted from BibTeX Library</string>
 			</dict>
 			<key>type</key>
 			<string>alfred.workflow.output.notification</string>

scripts/delete_entry.sh

@@ -2,9 +2,19 @@
 # shellcheck disable=SC2154
 CITEKEY="${citekey/@/}"
 LIBRARY="${bibtex_library_path/#\~/$HOME}"
+ENTRIES_BEFORE=$(grep -c -E "@.*{" "$LIBRARY")
 
 # deletes from a line matching the citekey to the next "}", https://stackoverflow.com/a/14492880
-sed -i '' "/{$CITEKEY,/,/}$/d" "$LIBRARY"
+# works with formatting from BibDesk and from Bookends
+sed -i '.bak' "/{$CITEKEY,/,/}$/d" "$LIBRARY"
+
+ENTRIES_AFTER=$(grep -c -E "@.*{" "$LIBRARY")
+DIFFERENCE=$((ENTRIES_BEFORE - ENTRIES_AFTER))
 
 # pass for notication in Alfred
-echo -n "$CITEKEY"
+if [[ $DIFFERENCE == 1 ]]; then
+	echo "Library now has $ENTRIES_AFTER entries."
+	mv -f "$LIBRARY.bak" ~./Trash
+else
+	echo "Error, deleted $DIFFERENCE citations. Check Backup file (ending with .bak) in library location."
+fi