Consider runfiles symlinks when computing Runfiles.getEmptyFilenames().

Runfiles.getEmptyFilenames() only considered the unconditional and
pruning manifest artifacts for empty-file insertion. Actual manifest
creation asks the empty files supplier for empty files over symlinks
(but not root symlinks!), too.

Change-Id: Ice69bbaa9e6169bff7ec5833ee7ef1b73049a4a7

Closes #5334.

Change-Id: Ice69bbaa9e6169bff7ec5833ee7ef1b73049a4a7
PiperOrigin-RevId: 201002604

1 files changed, 14 insertions, 23 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java b/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
index 93c3cef313..c189e1378d 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
@@ -18,7 +18,9 @@ import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Function;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Iterables;
+import com.google.common.collect.Streams;
 import com.google.devtools.build.lib.actions.Artifact;
 import com.google.devtools.build.lib.analysis.configuredtargets.RuleConfiguredTarget.Mode;
 import com.google.devtools.build.lib.cmdline.Label;
@@ -47,7 +49,6 @@ import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
-import java.util.TreeSet;
 import javax.annotation.Nullable;
 
 /**
@@ -82,22 +83,6 @@ public final class Runfiles implements RunfilesApi {
   @AutoCodec @AutoCodec.VisibleForSerialization
   static final EmptyFilesSupplier DUMMY_EMPTY_FILES_SUPPLIER = new DummyEmptyFilesSupplier();
 
-  private static final Function<Artifact, PathFragment> GET_ROOT_RELATIVE_PATH =
-      new Function<Artifact, PathFragment>() {
-        @Override
-        public PathFragment apply(Artifact input) {
-          return input.getRootRelativePath();
-        }
-      };
-
-  private static final Function<PathFragment, String> PATH_FRAGMENT_TO_STRING =
-      new Function<PathFragment, String>() {
-        @Override
-        public String apply(PathFragment input) {
-          return input.toString();
-        }
-      };
-
   /**
    * An entry in the runfiles map.
    *
@@ -360,12 +345,18 @@ public final class Runfiles implements RunfilesApi {
 
   @Override
   public NestedSet<String> getEmptyFilenames() {
-    Set<PathFragment> manifest = new TreeSet<>();
-    Iterables.addAll(
-        manifest, Iterables.transform(getArtifacts().toCollection(), GET_ROOT_RELATIVE_PATH));
-    return NestedSetBuilder.wrap(
-        Order.STABLE_ORDER,
-        Iterables.transform(emptyFilesSupplier.getExtraPaths(manifest), PATH_FRAGMENT_TO_STRING));
+    Set<PathFragment> manifestKeys =
+        Streams.concat(
+                Streams.stream(symlinks).map(SymlinkEntry::getPath),
+                Streams.stream(getArtifacts()).map(Artifact::getRootRelativePath))
+            .collect(ImmutableSet.toImmutableSet());
+    Iterable<PathFragment> emptyKeys = emptyFilesSupplier.getExtraPaths(manifestKeys);
+    return NestedSetBuilder.<String>stableOrder()
+        .addAll(
+            Streams.stream(emptyKeys)
+                .map(PathFragment::toString)
+                .collect(ImmutableList.toImmutableList()))
+        .build();
   }
 
   /**