Python: absolute basics

probably still need to route some values around

src/init-action.ts

@@ -65,6 +65,7 @@ import {
   getErrorMessage,
 } from "./util";
 import { validateWorkflow } from "./workflow";
+import { isFeatureAvailable } from "@actions/cache";
 
 /** Fields of the init status report that can be sent before `config` is populated. */
 interface InitStatusReport extends StatusReportBase {
@@ -611,6 +612,15 @@ async function run() {
       );
     }
 
+    if (await codeql.supportsFeature(ToolsFeature.PythonDefaultIsToNotExtractStdlib)) {
+      // We are in the case where the default has switched to not extracting the stdlib.
+      if (!(await features.getValue(Feature.CodeqlActionPythonDefaultIsToNotExtractStdlib, codeql))) {
+        // We are in a situation where the feature flag is not rolled out,
+        // so we need to suppress the new default behavior.
+        core.exportVariable("CODEQL_EXTRACTOR_PYTHON_EXTRACT_STDLIB", "true");
+      }
+    }
+
     const sourceRoot = path.resolve(
       getRequiredEnvParam("GITHUB_WORKSPACE"),
       getOptionalInput("source-root") || "",