feat: Add getDefaultProcessors to CatalogBuilder

Signed-off-by: Bryce Larson <bryce.larson@originenergy.com.au>

.changeset/violet-panthers-care.md

@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-catalog-backend': patch
+---
+
+adds getDefaultProcessor method to CatalogBuilder

plugins/catalog-backend/src/service/NextCatalogBuilder.ts

@@ -265,7 +265,8 @@ export class NextCatalogBuilder {
    * Sets what entity processors to use. These are responsible for reading,
    * parsing, and processing entities before they are persisted in the catalog.
    *
-   * This function replaces the default set of processors; use with care.
+   * This function replaces the default set of processors, consider using with
+   * {@link NextCatalogBuilder#getDefaultProcessors}; use with care.
    *
    * @param processors One or more processors
    */
@@ -275,6 +276,30 @@ export class NextCatalogBuilder {
     return this;
   }
 
+  /**
+   * Returns the default list of entity processors. These are responsible for reading,
+   * parsing, and processing entities before they are persisted in the catalog. Changing
+   * the order of processing can give more control to custom processors.
+   *
+   * Consider using with with {@link NextCatalogBuilder#replaceProcessors}
+   *
+   */
+  getDefaultProcessors(): CatalogProcessor[] {
+    const { config, logger, reader } = this.env;
+    const integrations = ScmIntegrations.fromConfig(config);
+
+    return [
+      new FileReaderProcessor(),
+      BitbucketDiscoveryProcessor.fromConfig(config, { logger }),
+      GithubDiscoveryProcessor.fromConfig(config, { logger }),
+      GithubOrgReaderProcessor.fromConfig(config, { logger }),
+      GitLabDiscoveryProcessor.fromConfig(config, { logger }),
+      new UrlReaderProcessor({ reader, logger }),
+      CodeOwnersProcessor.fromConfig(config, { logger, reader }),
+      new AnnotateLocationEntityProcessor({ integrations }),
+    ];
+  }
+
   /**
    * Sets up the catalog to use a custom parser for entity data.
    *
@@ -416,16 +441,7 @@ export class NextCatalogBuilder {
 
     // These are only added unless the user replaced them all
     if (!this.processorsReplace) {
-      processors.push(
-        new FileReaderProcessor(),
-        BitbucketDiscoveryProcessor.fromConfig(config, { logger }),
-        GithubDiscoveryProcessor.fromConfig(config, { logger }),
-        GithubOrgReaderProcessor.fromConfig(config, { logger }),
-        GitLabDiscoveryProcessor.fromConfig(config, { logger }),
-        new UrlReaderProcessor({ reader, logger }),
-        CodeOwnersProcessor.fromConfig(config, { logger, reader }),
-        new AnnotateLocationEntityProcessor({ integrations }),
-      );
+      processors.push(...this.getDefaultProcessors());
     }
 
     // Add the ones (if any) that the user added