Simplify

src/freedombone-utils-android

             app_filename="/usr/share/${PROJECT_NAME}/apps/${PROJECT_NAME}-app-${app_name}"
             if [ -f "$app_filename" ]; then
                 app_name_upper=$(echo "$app_name" | awk '{print toupper($0)}')
-                "${app_name_upper}_SHORT_DESCRIPTION"=
-                "${app_name_upper}_DESCRIPTION"=
-                "${app_name_upper}_ICON_URL"=
-                "${app_name_upper}_MOBILE_APP_URL"=
+                SHORT_DESCRIPTION=
+                DESCRIPTION=
+                ICON_URL=
+                MOBILE_APP_URL=
 
                 if ! grep -q "${app_name_upper}_SHORT_DESCRIPTION=" "$app_filename"; then
                     continue
                 if grep -q "#${app_name_upper}_SHORT_DESCRIPTION=" "$app_filename"; then
                     continue
                 fi
-                # shellcheck disable=SC2140
-                "${app_name_upper}_SHORT_DESCRIPTION"="$(grep "${app_name_upper}_SHORT_DESCRIPTION=" "$app_filename" | head -n 1 | awk -F '=' '{print $2}')"
+                SHORT_DESCRIPTION=$(grep "${app_name_upper}_SHORT_DESCRIPTION=" "$app_filename" | head -n 1 | sed 's|\$||g' | awk -F '=' '{print $2}')
 
                 if grep -q "${app_name_upper}_DESCRIPTION=" "$app_filename"; then
-                    # shellcheck disable=SC2140
-                    "${app_name_upper}_DESCRIPTION"="$(grep "${app_name_upper}_DESCRIPTION=" "$app_filename" | head -n 1 | awk -F '=' '{print $2}')"
+                    DESCRIPTION="$(grep "${app_name_upper}_DESCRIPTION=" "$app_filename" | head -n 1 | sed 's|\$||g' | sed 's|\$||g' | awk -F '=' '{print $2}')"
                 fi
                 if grep -q "${app_name_upper}_ICON_URL=" "$app_filename"; then
-                    # shellcheck disable=SC2140
-                    "${app_name_upper}_ICON_URL"="$(grep "${app_name_upper}_ICON_URL=" "$app_filename" | head -n 1 | awk -F '=' '{print $2}')"
+                    ICON_URL="$(grep "${app_name_upper}_ICON_URL=" "$app_filename" | head -n 1 | sed 's|\$||g' | sed 's|\$||g' | awk -F '=' '{print $2}')"
                 fi
                 if grep -q "${app_name_upper}_MOBILE_APP_URL=" "$app_filename"; then
-                    # shellcheck disable=SC2140
-                    "${app_name_upper}_MOBILE_APP_URL"="$(grep "${app_name_upper}_MOBILE_APP_URL=" "$app_filename" | head -n 1 | awk -F '=' '{print $2}')"
+                    MOBILE_APP_URL="$(grep "${app_name_upper}_MOBILE_APP_URL=" "$app_filename" | head -n 1 | sed 's|\$||g' | sed 's|\$||g' | awk -F '=' '{print $2}')"
                 fi
 
                 if [ $android_ctr -gt 0 ]; then
 
                 { echo '    {';
                   echo "      \"name\": \"${app_name}\",";
-                  echo "      \"short_description\": \""$((${app_name_upper}_SHORT_DESCRIPTION))"\",";
-                  echo "      \"description\": \""$((${app_name_upper}_DESCRIPTION))"\",";
-                  echo "      \"icon_url\": \""$((${app_name_upper}_ICON_URL))"\",";
+                  echo "      \"short_description\": \"$SHORT_DESCRIPTION\",";
+                  echo "      \"description\": \"$DESCRIPTION))\",";
+                  echo "      \"icon_url\": \"$ICON_URL\",";
                   echo "      \"clients\": ["; } >> "$plinth_api"
 
-                if [[ $(("${app_name_upper}_DOMAIN_NAME")) && "$app_name" != 'matrix' ]]; then
+                domain_name=$(("${app_name_upper}_DOMAIN_NAME"))
+                if [[ "$domain_name" && "$app_name" != 'matrix' ]]; then
                     { echo '        {';
                       echo "          \"name\": \"${app_name}\",";
                       echo "          \"platforms\": [";
                       echo '            {';
                       echo '              "type": "web",';
-                      echo "              \"url\": \""$((${app_name_upper}_DOMAIN_NAME))"\"";
+                      echo "              \"url\": \"$domain_name\"";
                       echo '            }';
                       echo '          ]';
                       echo -n '        }'; } >> "$plinth_api"
                 fi
 
-                if [ $(("${app_name_upper}_MOBILE_APP_URL")) ]; then
-                    if [[ $(("${app_name_upper}_DOMAIN_NAME")) && "$app_name" != 'matrix' ]]; then
+                if [ "$MOBILE_APP_URL" ]; then
+                    if [[ "$domain_name" && "$app_name" != 'matrix' ]]; then
                         echo ',' >> "$plinth_api"
                     fi
                     { echo '        {';
                       echo '              "type": "store",';
                       echo '              "os": "android",';
                       echo '              "store_name": "f-droid",';
-                      echo "              \"url\": \""$((${app_name_upper}_MOBILE_APP_URL))"\"";
+                      echo "              \"url\": \"$MOBILE_APP_URL\"";
                       echo '            }';
                       echo '          ]';
                       echo -n '        }'; } >> "$plinth_api"