fixed bach synatax error

plugin.sh

@@ -8,14 +8,13 @@ PREVIOUSTAG=$(git tag --sort=-taggerdate | head -n 2 | tail -n 1)
 ALLCHANGES=$(npx -y @philippdormann/changelogen@latest --from $PREVIOUSTAG --to $CURRENTTAG --no-output | sed 's/"/\\"/g' | tail -n +6)
 FORMATTED_CHANGES=$(echo "# $CURRENTTAG \n $ALLCHANGES" | pandoc -f markdown -t html | sed 's/"/'"'"'/g' | xargs echo -n)
 
-echo $PLUGIN_GITEA_DOMAIN;
 
-if [[ "${PLUGIN_GITEA_DOMAIN:-}" == "true" ]]; then
-  if [[ -n "${PLUGIN_GITEA_APIKEY:-}"]]; then
+if [[ -n "$PLUGIN_GITEA_DOMAIN" ]]; then
+  if [[ -z "$PLUGIN_GITEA_APIKEY"]]; then
     echo "No api key provided";
     exit 1;
   fi
-  if [[ -n "${PLUGIN_REPO:-}"]]; then
+  if [[ -z "$PLUGIN_REPO"]]; then
     PLUGIN_REPO=$CI_REPO_NAME
   fi
 
@@ -30,16 +29,16 @@ if [[ "${PLUGIN_GITEA_DOMAIN:-}" == "true" ]]; then
       \"tag_name\": \"$CURRENTTAG\"
   }"
 fi
-if [[ "${PLUGIN_MATRIX_SERVER:-}" == "true" ]]; then
-  if [[ -n "${PLUGIN_MATRIX_USER:-}"]]; then
+if [[ -n "$PLUGIN_MATRIX_SERVER" ]]; then
+  if [[ -z "$PLUGIN_MATRIX_USER" ]]; then
     echo "No matrix username provided";
     exit 3;
   fi
-  if [[ -n "${PLUGIN_MATRIX_PASSWORD:-}"]]; then
+  if [[ -z "$PLUGIN_MATRIX_PASSWORD" ]]; then
     echo "No matrix password provided";
     exit 4;
   fi
-  if [[ -n "${PLUGIN_MATRIX_ROOM:-}"]]; then
+  if [[ -z "$PLUGIN_MATRIX_ROOM" ]]; then
     echo "No matrix room id provided";
     exit 4;
   fi