Log disclaimer about connection tests, with link to docs

Author: mbg

lib/start-proxy-action.js

@@ -8,6 +8,7 @@ export enum DocUrl {
   CODEQL_BUILD_MODES = "https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages#codeql-build-modes",
   DEFINE_ENV_VARIABLES = "https://docs.github.com/en/actions/learn-github-actions/variables#defining-environment-variables-for-a-single-workflow",
   DELETE_ACTIONS_CACHE_ENTRIES = "https://docs.github.com/en/actions/how-tos/manage-workflow-runs/manage-caches#deleting-cache-entries",
+  PRIVATE_REGISTRY_LOGS = "https://docs.github.com/en/code-security/reference/code-scanning/code-scanning-logs#diagnostic-information-for-private-package-registries",
   SCANNING_ON_PUSH = "https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/customizing-your-advanced-setup-for-code-scanning#scanning-on-push",
   SPECIFY_BUILD_STEPS_MANUALLY = "https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages#about-specifying-build-steps-manually",
   SYSTEM_REQUIREMENTS = "https://codeql.github.com/docs/codeql-overview/system-requirements/",

src/doc-url.ts

@@ -111,7 +111,7 @@ async function run(startedAt: Date) {
       logger,
     );
 
-    // Check that the private registries are reachable.
+    // Perform best-effort checks that the private registries are reachable.
     await checkConnections(logger, proxyInfo);
 
     // Report success if we have reached this point.

src/start-proxy-action.ts

@@ -2,6 +2,7 @@ import * as https from "https";
 
 import { HttpsProxyAgent } from "https-proxy-agent";
 
+import { DocUrl } from "../doc-url";
 import { Logger } from "../logging";
 import { getErrorMessage } from "../util";
 
@@ -114,6 +115,13 @@ export async function checkConnections(
   // Don't do anything if there are no registries.
   if (proxy.registries.length === 0) return result;
 
+  // Start a log group and print a message with a disclaimer with a link to the
+  // relevant documentation that these checks are a best-effort process.
+  logger.startGroup("Testing connections via the proxy");
+  logger.info(
+    `The connection tests performed here are best-effort only and failures here may not affect the subsequent analysis. See ${DocUrl.PRIVATE_REGISTRY_LOGS} for more information.`,
+  );
+
   try {
     // Initialise a networking backend if no backend was provided.
     if (backend === undefined) {
@@ -158,5 +166,6 @@ export async function checkConnections(
     );
   }
 
+  logger.endGroup();
   return result;
 }