feat(cli-integ-test): allow configuring upstream versions (#824)

* feat(cli-integ-test): allow configuring upstream versions

Allows configuring that upstream versions are visible for select
packages.

This will be used for `@aws-cdk/cloud-assembly-schema`, which we will
need available under the new version (for `cdk-assets`) as well as under
an old version (for `aws-cdk-lib`).

* chore: self mutation

Signed-off-by: github-actions <[email protected]>

---------

Signed-off-by: github-actions <[email protected]>
Co-authored-by: github-actions <[email protected]>

Author: rix0rrr

API.md

@@ -33,13 +33,22 @@ export interface CdkCliIntegTestsWorkflowProps {
 
   /**
    * Packages that are locally transfered (we will never use the upstream versions)
+   *
+   * Takes package names; these are expected to live in `packages/<NAME>/dist/js`.
    */
   readonly localPackages: string[];
 
   /**
    * The official repo this workflow is used for
    */
   readonly sourceRepo: string;
+
+  /**
+   * If given, allows accessing upstream versions of these packages
+   *
+   * @default - No upstream versions
+   */
+  readonly allowUpstreamVersions?: string[];
 }
 
 /**
@@ -79,6 +88,12 @@ export class CdkCliIntegTestsWorkflow extends Component {
     }
     ((buildWorkflow as any).workflow as github.GithubWorkflow);
 
+    props.allowUpstreamVersions?.forEach((pack) => {
+      if (!props.localPackages.includes(pack)) {
+        throw new Error(`Package in allowUpstreamVersions but not in localPackages: ${pack}`);
+      }
+    });
+
     runTestsWorkflow.on({
       pullRequestTarget: {
         branches: ['main'],
@@ -182,10 +197,12 @@ export class CdkCliIntegTestsWorkflow extends Component {
     };
 
     for (const pack of props.localPackages) {
+      const allowUpstream = props.allowUpstreamVersions?.includes(pack);
+
       verdaccioConfig.packages[pack] = {
         access: '$all',
         publish: '$all',
-        proxy: 'none',
+        proxy: allowUpstream ? 'npmjs' : 'none',
       };
     };
     verdaccioConfig.packages['**'] = {

src/cdk-cli-integ-tests.ts

@@ -14,6 +14,7 @@ test('snapshot test for the CDK CLI integ tests', () => {
     testRunsOn: 'testRunsOn',
     localPackages: ['@aws-cdk/bla', '@aws-cdk/bloeh'],
     sourceRepo: 'aws/some-repo',
+    allowUpstreamVersions: ['@aws-cdk/bla'],
   });
 
   const outdir = Testing.synth(repo);