Bypass toolcache when feature flag enabled

lib/codeql.js

@@ -218,16 +218,24 @@ async function getCodeQLBundleDownloadURL(apiDetails, variant, logger) {
  * @param apiDetails
  * @param tempDir
  * @param variant
+ * @param featureFlags
  * @param logger
  * @param checkVersion Whether to check that CodeQL CLI meets the minimum
  *        version requirement. Must be set to true outside tests.
  * @returns
  */
-async function setupCodeQL(codeqlURL, apiDetails, tempDir, variant, logger, checkVersion) {
+async function setupCodeQL(codeqlURL, apiDetails, tempDir, variant, featureFlags, logger, checkVersion) {
     try {
+        const forceLatest = 
         // We use the special value of 'latest' to prioritize the version in the
         // defaults over any pinned cached version.
-        const forceLatest = codeqlURL === "latest";
+        codeqlURL === "latest" ||
+            // If the user hasn't requested a particular CodeQL version, then bypass
+            // the toolcache when the appropriate feature flag is enabled. This
+            // allows us to quickly rollback a broken bundle that has made its way
+            // into the toolcache.
+            (codeqlURL === undefined &&
+                (await featureFlags.getValue(feature_flags_1.FeatureFlag.BypassToolcacheEnabled)));
         if (forceLatest) {
             codeqlURL = undefined;
         }