Move config files to CLI modules with lazy proxies

Move jest config files to cli-module-test-jest/config and node
transform + webpack-public-path to cli-module-build/config. Replace
originals in @backstage/cli/config with lazy proxies that forward
to the appropriate module or throw if it is not installed.

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Made-with: Cursor

packages/cli-module-build/src/lib/bundler/config.ts

@@ -29,7 +29,7 @@ import { ModuleFederationPlugin } from '@module-federation/enhanced/rspack';
 import fs from 'fs-extra';
 import { optimization as optimizationConfig } from './optimization';
 import pickBy from 'lodash/pickBy';
-import { runOutput, targetPaths } from '@backstage/cli-common';
+import { findOwnPaths, runOutput, targetPaths } from '@backstage/cli-common';
 
 import { transforms } from './transforms';
 import { version } from '../../../package.json';
@@ -330,7 +330,8 @@ export async function createConfig(
     devtool: isDev ? 'eval-cheap-module-source-map' : 'source-map',
     context: paths.targetPath,
     entry: [
-      require.resolve('@backstage/cli/config/webpack-public-path'),
+      /* eslint-disable-next-line no-restricted-syntax */
+      findOwnPaths(__dirname).resolve('config/webpack-public-path'),
       ...(options.additionalEntryPoints ?? []),
       paths.targetEntry,
     ],

packages/cli-module-build/src/lib/runner/runBackend.ts

@@ -21,14 +21,15 @@ import { IpcServer, ServerDataStore } from '../ipc';
 import debounce from 'lodash/debounce';
 import { fileURLToPath } from 'node:url';
 import { isAbsolute as isAbsolutePath } from 'node:path';
-import { targetPaths } from '@backstage/cli-common';
+import { findOwnPaths, targetPaths } from '@backstage/cli-common';
 
 import spawn from 'cross-spawn';
 
 const loaderArgs = [
   '--enable-source-maps',
   '--require',
-  require.resolve('@backstage/cli/config/nodeTransform.cjs'),
+  /* eslint-disable-next-line no-restricted-syntax */
+  findOwnPaths(__dirname).resolve('config/nodeTransform.cjs'),
   // TODO: Support modules, although there's currently no way to load them since import() is transpiled tp require()
 ];
 

packages/cli-module-build/src/tests/transforms/transforms.test.ts

@@ -16,6 +16,7 @@
 
 import { execFileSync } from 'node:child_process';
 import { resolve as resolvePath } from 'node:path';
+import { findOwnPaths } from '@backstage/cli-common';
 import { Output, buildPackage } from '../../lib/builder';
 
 const exportValues = {
@@ -55,7 +56,8 @@ function loadFixture(fixture: string) {
     'node',
     [
       '--import',
-      '@backstage/cli/config/nodeTransform.cjs',
+      /* eslint-disable-next-line no-restricted-syntax */
+      findOwnPaths(__dirname).resolve('config/nodeTransform.cjs'),
       resolvePath(__dirname, `__fixtures__/${fixture}`),
     ],
     { encoding: 'utf8' },