Populate DetailedExitCode for BuildFileNotFoundException errors in PackageLookupFunction. Also switch the exit code for some package loading codes to "environmental error" since they come from disk problems/concurrent changes, not source state.

PiperOrigin-RevId: 363720546
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/BUILD b/src/main/java/com/google/devtools/build/lib/skyframe/BUILD
index 2136d58..3e49f95 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/BUILD
@@ -1795,11 +1795,13 @@
         "//src/main/java/com/google/devtools/build/lib/pkgcache",
         "//src/main/java/com/google/devtools/build/lib/repository:external_package_helper",
         "//src/main/java/com/google/devtools/build/lib/rules:repository/repository_directory_value",
+        "//src/main/java/com/google/devtools/build/lib/util:detailed_exit_code",
         "//src/main/java/com/google/devtools/build/lib/vfs",
         "//src/main/java/com/google/devtools/build/lib/vfs:pathfragment",
         "//src/main/java/com/google/devtools/build/skyframe",
         "//src/main/java/com/google/devtools/build/skyframe:skyframe-objects",
         "//src/main/java/net/starlark/java/eval",
+        "//src/main/protobuf:failure_details_java_proto",
         "//third_party:guava",
         "//third_party:jsr305",
     ],
@@ -2143,6 +2145,7 @@
     ],
     deps = [
         ":action_execution_value",
+        ":detailed_exceptions",
         ":directory_listing_value",
         ":file_symlink_exception",
         ":file_symlink_infinite_expansion_exception",
@@ -2164,6 +2167,7 @@
         "//src/main/java/com/google/devtools/build/lib/vfs:pathfragment",
         "//src/main/java/com/google/devtools/build/skyframe",
         "//src/main/java/com/google/devtools/build/skyframe:skyframe-objects",
+        "//src/main/protobuf:failure_details_java_proto",
         "//third_party:guava",
         "//third_party:jsr305",
     ],
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/PackageLookupFunction.java b/src/main/java/com/google/devtools/build/lib/skyframe/PackageLookupFunction.java
index 14c8347..ec22abe 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/PackageLookupFunction.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/PackageLookupFunction.java
@@ -31,6 +31,8 @@
 import com.google.devtools.build.lib.pkgcache.PathPackageLocator;
 import com.google.devtools.build.lib.repository.ExternalPackageHelper;
 import com.google.devtools.build.lib.rules.repository.RepositoryDirectoryValue;
+import com.google.devtools.build.lib.server.FailureDetails;
+import com.google.devtools.build.lib.util.DetailedExitCode;
 import com.google.devtools.build.lib.vfs.PathFragment;
 import com.google.devtools.build.lib.vfs.Root;
 import com.google.devtools.build.lib.vfs.RootedPath;
@@ -183,26 +185,52 @@
       throws PackageLookupFunctionException, InterruptedException {
     String basename = fileRootedPath.asPath().getBaseName();
     SkyKey fileSkyKey = FileValue.key(fileRootedPath);
-    FileValue fileValue = null;
+    FileValue fileValue;
     try {
       fileValue = (FileValue) env.getValueOrThrow(fileSkyKey, IOException.class);
     } catch (InconsistentFilesystemException e) {
       // This error is not transient from the perspective of the PackageLookupFunction.
       throw new PackageLookupFunctionException(e, Transience.PERSISTENT);
     } catch (FileSymlinkException e) {
+      String message =
+          e.getMessage()
+              + " detected while trying to find "
+              + basename
+              + " file "
+              + fileRootedPath.asPath();
       throw new PackageLookupFunctionException(
           new BuildFileNotFoundException(
               packageIdentifier,
-              "Symlink cycle detected while trying to find "
-                  + basename
-                  + " file "
-                  + fileRootedPath.asPath(),
-              e),
+              message,
+              DetailedExitCode.of(
+                  FailureDetails.FailureDetail.newBuilder()
+                      .setMessage(message)
+                      .setPackageLoading(
+                          FailureDetails.PackageLoading.newBuilder()
+                              .setCode(
+                                  FailureDetails.PackageLoading.Code
+                                      .SYMLINK_CYCLE_OR_INFINITE_EXPANSION))
+                      .build())),
           Transience.PERSISTENT);
     } catch (IOException e) {
-      throw new PackageLookupFunctionException(new BuildFileNotFoundException(packageIdentifier,
-          "IO errors while looking for " + basename + " file reading "
-              + fileRootedPath.asPath() + ": " + e.getMessage(), e),
+      String message =
+          "IO errors while looking for "
+              + basename
+              + " file reading "
+              + fileRootedPath.asPath()
+              + ": "
+              + e.getMessage();
+      throw new PackageLookupFunctionException(
+          new BuildFileNotFoundException(
+              packageIdentifier,
+              message,
+              DetailedExitCode.of(
+                  FailureDetails.FailureDetail.newBuilder()
+                      .setMessage(message)
+                      .setPackageLoading(
+                          FailureDetails.PackageLoading.newBuilder()
+                              .setCode(FailureDetails.PackageLoading.Code.OTHER_IO_EXCEPTION))
+                      .build())),
           Transience.PERSISTENT);
     }
     return fileValue;
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/RecursiveFilesystemTraversalFunction.java b/src/main/java/com/google/devtools/build/lib/skyframe/RecursiveFilesystemTraversalFunction.java
index 8cfda43..457394e 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/RecursiveFilesystemTraversalFunction.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/RecursiveFilesystemTraversalFunction.java
@@ -36,6 +36,7 @@
 import com.google.devtools.build.lib.profiler.Profiler;
 import com.google.devtools.build.lib.profiler.ProfilerTask;
 import com.google.devtools.build.lib.profiler.SilentCloseable;
+import com.google.devtools.build.lib.server.FailureDetails;
 import com.google.devtools.build.lib.skyframe.RecursiveFilesystemTraversalValue.FileType;
 import com.google.devtools.build.lib.skyframe.RecursiveFilesystemTraversalValue.ResolvedFile;
 import com.google.devtools.build.lib.skyframe.RecursiveFilesystemTraversalValue.ResolvedFileFactory;
@@ -233,14 +234,28 @@
           String.format(
               "Error while traversing directory %s: %s",
               traversal.root.getRelativePart(), e.getMessage());
+      // Trying to stat the starting point of this root may have failed with a symlink cycle or
+      // trying to get a package lookup value may have failed due to a symlink cycle.
+      RecursiveFilesystemTraversalException.Type exceptionType =
+          RecursiveFilesystemTraversalException.Type.FILE_OPERATION_FAILURE;
+      if (e instanceof FileSymlinkException) {
+        exceptionType =
+            RecursiveFilesystemTraversalException.Type.SYMLINK_CYCLE_OR_INFINITE_EXPANSION;
+      }
+      if (e instanceof DetailedException) {
+        FailureDetails.PackageLoading.Code code =
+            ((DetailedException) e)
+                .getDetailedExitCode()
+                .getFailureDetail()
+                .getPackageLoading()
+                .getCode();
+        if (code == FailureDetails.PackageLoading.Code.SYMLINK_CYCLE_OR_INFINITE_EXPANSION) {
+          exceptionType =
+              RecursiveFilesystemTraversalException.Type.SYMLINK_CYCLE_OR_INFINITE_EXPANSION;
+        }
+      }
       throw new RecursiveFilesystemTraversalFunctionException(
-          new RecursiveFilesystemTraversalException(
-              message,
-              // Trying to stat the starting point of this root may have failed with a symlink cycle
-              // or trying to get a package lookup value may have failed due to a symlink cycle.
-              e instanceof FileSymlinkException || e.getCause() instanceof FileSymlinkException
-                  ? RecursiveFilesystemTraversalException.Type.SYMLINK_CYCLE_OR_INFINITE_EXPANSION
-                  : RecursiveFilesystemTraversalException.Type.FILE_OPERATION_FAILURE));
+          new RecursiveFilesystemTraversalException(message, exceptionType));
     }
   }