Allow package prefixes to be customized for DevTools dependency listing

Signed-off-by: Brian Phillips <28457+brianphillips@users.noreply.github.com>

plugins/devtools-backend/config.d.ts

@@ -40,5 +40,10 @@ export interface Config {
         target: string;
       }>;
     };
+    /**
+     * A list of package prefixes that DevTools will use for filtering all available dependencies
+     * (default is ["@backstage"])
+     */
+    packagePrefixes?: string[];
   };
 }

plugins/devtools-backend/src/api/DevToolsBackendApi.ts

@@ -219,7 +219,12 @@ export class DevToolsBackendApi {
     const lockfilePath = paths.resolveTargetRoot('yarn.lock');
     const lockfile = await Lockfile.load(lockfilePath);
 
-    const deps = [...lockfile.keys()].filter(n => n.startsWith('@backstage/'));
+    const prefixes = this.config.getOptionalStringArray(
+      'devTools.packagePrefixes',
+    ) ?? ['@backstage/'];
+    const deps = [...lockfile.keys()].filter(n =>
+      prefixes.some(prefix => n.startsWith(prefix)),
+    );
 
     const infoDependencies: PackageDependency[] = [];
     for (const dep of deps) {