cli: write serialized config schema to app output

packages/cli/src/lib/bundler/bundle.ts

@@ -33,7 +33,7 @@ const WARN_AFTER_BUNDLE_GZIP_SIZE = 512 * 1024;
 const WARN_AFTER_CHUNK_GZIP_SIZE = 1024 * 1024;
 
 export async function buildBundle(options: BuildOptions) {
-  const { statsJsonEnabled } = options;
+  const { statsJsonEnabled, schema: configSchema } = options;
 
   const paths = resolveBundlingPaths(options);
   const config = await createConfig(paths, {
@@ -56,6 +56,14 @@ export async function buildBundle(options: BuildOptions) {
     });
   }
 
+  if (configSchema) {
+    await fs.writeJson(
+      resolvePath(paths.targetDist, '.config-schema.json'),
+      configSchema.serialize(),
+      { spaces: 2 },
+    );
+  }
+
   const { stats } = await build(compiler, isCi).catch(error => {
     console.log(chalk.red('Failed to compile.\n'));
     throw new Error(`Failed to compile.\n${error.message || error}`);

packages/cli/src/lib/bundler/types.ts

@@ -17,6 +17,7 @@
 import { AppConfig, Config } from '@backstage/config';
 import { BundlingPathsOptions } from './paths';
 import { ParallelOption } from '../parallel';
+import { ConfigSchema } from '@backstage/config-loader';
 
 export type BundlingOptions = {
   checksEnabled: boolean;
@@ -36,6 +37,7 @@ export type ServeOptions = BundlingPathsOptions & {
 export type BuildOptions = BundlingPathsOptions & {
   statsJsonEnabled: boolean;
   parallel?: ParallelOption;
+  schema?: ConfigSchema;
   frontendConfig: Config;
   frontendAppConfigs: AppConfig[];
 };