Merge pull request #30938 from backstage/blam/catalog-backwards-compat

`catalog-react`: Add support for backwards comat of `default*` props for Blueprints

.changeset/yellow-dragons-float.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-react': patch
+---
+
+Support `default*` for older packages as this package is in range for breaking `/alpha` changes

plugins/catalog-react/src/alpha/blueprints/EntityContentBlueprint.ts

@@ -86,9 +86,12 @@ export const EntityContentBlueprint = createExtensionBlueprint({
     },
     { node, config },
   ) {
-    const path = config.path ?? params.path;
-    const title = config.title ?? params.title;
-    const group = config.group ?? params.group;
+    // TODO(blam): Remove support for all the `default*` props in the future, this breaks backwards compatibility without it
+    // As this is marked as BREAKING ALPHA, it doesn't affect the public API so it falls in range and gets picked
+    // up by packages that depend on `catalog-react`.
+    const path = config.path ?? params.path ?? params.defaultPath;
+    const title = config.title ?? params.title ?? params.defaultTitle;
+    const group = config.group ?? params.group ?? params.defaultGroup;
 
     yield coreExtensionData.reactElement(
       ExtensionBoundary.lazy(node, params.loader),
@@ -104,7 +107,7 @@ export const EntityContentBlueprint = createExtensionBlueprint({
 
     yield* resolveEntityFilterData(params.filter, config, node);
 
-    if (group) {
+    if (group && typeof group === 'string') {
       yield entityContentGroupDataRef(group);
     }
   },

plugins/catalog-react/src/alpha/converters/convertLegacyEntityContentExtension.tsx

@@ -82,13 +82,19 @@ export function convertLegacyEntityContentExtension(
     }
   }
   name = name && kebabCase(name);
-
+  // TODO(blam): Remove support for all the `default*` props in the future, this breaks backwards compatibility without it
+  // As this is marked as BREAKING ALPHA, it doesn't affect the public API so it falls in range and gets picked
+  // up by packages that depend on `catalog-react`.
   return EntityContentBlueprint.make({
     name: overrides?.name ?? name,
     params: {
       filter: overrides?.filter,
-      path: overrides?.path ?? `/${kebabCase(infix)}`,
-      title: overrides?.title ?? startCase(infix),
+      path: (overrides?.path ??
+        overrides?.defaultPath ??
+        `/${kebabCase(infix)}`) as string,
+      title: (overrides?.title ??
+        overrides?.defaultTitle ??
+        startCase(infix)) as string,
       routeRef: mountPoint && convertLegacyRouteRef(mountPoint),
       loader: async () => compatWrapper(element),
     },