Do not pre-cache changed files under managed directories

Closes #8337.

PiperOrigin-RevId: 248530274

Author: irengrig

src/main/java/com/google/devtools/build/lib/skyframe/DirtinessCheckerUtils.java

@@ -144,7 +144,8 @@ public SkyValueDirtinessChecker.DirtyResult check(
         return SkyValueDirtinessChecker.DirtyResult.notDirty(oldValue);
       }
       FileType fileType = externalFilesHelper.getAndNoteFileType((RootedPath) skyKey.argument());
-      if (fileType == FileType.EXTERNAL_REPO) {
+      if (fileType == FileType.EXTERNAL_REPO
+          || fileType == FileType.EXTERNAL_IN_MANAGED_DIRECTORY) {
         // Files under output_base/external have a dependency on the WORKSPACE file, so we don't add
         // a new SkyValue to the graph yet because it might change once the WORKSPACE file has been
         // parsed.

src/main/java/com/google/devtools/build/lib/skyframe/SequencedSkyframeExecutor.java

@@ -490,9 +490,15 @@ private void handleDiffsWithMissingDiffInformation(
     ExternalFilesHelper tmpExternalFilesHelper =
         externalFilesHelper.cloneWithFreshExternalFilesKnowledge();
     // See the comment for FileType.OUTPUT for why we need to consider output files here.
-    EnumSet<FileType> fileTypesToCheck = checkOutputFiles
-        ? EnumSet.of(FileType.EXTERNAL, FileType.EXTERNAL_REPO, FileType.OUTPUT)
-        : EnumSet.of(FileType.EXTERNAL, FileType.EXTERNAL_REPO);
+    EnumSet<FileType> fileTypesToCheck =
+        checkOutputFiles
+            ? EnumSet.of(
+                FileType.EXTERNAL,
+                FileType.EXTERNAL_REPO,
+                FileType.EXTERNAL_IN_MANAGED_DIRECTORY,
+                FileType.OUTPUT)
+            : EnumSet.of(
+                FileType.EXTERNAL, FileType.EXTERNAL_REPO, FileType.EXTERNAL_IN_MANAGED_DIRECTORY);
     logger.info(
         "About to scan skyframe graph checking for filesystem nodes of types "
             + Iterables.toString(fileTypesToCheck));