Allow value to be non-string

Signed-off-by: Taras <tarasm@gmail.com>

plugins/catalog-backend/src/modules/core/PlaceholderProcessor.test.ts

@@ -396,7 +396,6 @@ describe('PlaceholderProcessor', () => {
     const processor = new PlaceholderProcessor({
       resolvers: {
         merge: async ({ value }) => {
-          console.log({ value });
           if (value instanceof Object) {
             return { merged: 'value', ...value };
           }

plugins/catalog-backend/src/modules/core/PlaceholderProcessor.ts

@@ -111,15 +111,19 @@ export class PlaceholderProcessor implements CatalogProcessor {
       const resolverValue = data[keys[0]];
 
       const resolver = this.options.resolvers[resolverKey];
-      if (!resolver || typeof resolverValue !== 'string') {
-        // If there was no such placeholder resolver or if the value was not a
-        // string, we err on the side of safety and assume that this is
-        // something that's best left alone. For example, if the input contains
-        // JSONSchema, there may be "$ref": "#/definitions/node" nodes in the
-        // document.
+      if (!resolver) {
+        // If there was no such placeholder resolver, we err on the side of safety
+        // and assume that this is something that's best left alone. For example, if
+        // the input contains JSONSchema, there may be "$ref": "#/definitions/node"
+        // nodes in the document.
         return [data, false];
       }
 
+      // if (typeof resolverValue !== 'string') {
+      // treat it as an argument to resolver function
+      // TODO: make this recursive, but it should resolve from bottom up
+      // }
+
       const read = async (url: string): Promise<Buffer> => {
         if (this.options.reader.readUrl) {
           const response = await this.options.reader.readUrl(url);