Allow BUILD files directly under the build root

This makes the empty package name legal (//:foo). If the empty package is used,
this symlinks everything under the build root to the exec root.  This includes
directories.

--
MOS_MIGRATED_REVID=87960882

1 files changed, 0 insertions, 6 deletions

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 f800d367c5..9ba197b8d6 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
@@ -54,12 +54,6 @@ class PackageLookupFunction implements SkyFunction {
       return computeExternalPackageLookupValue(skyKey, env);
     }
     PathFragment pkg = packageKey.getPackageFragment();
-
-    // This represents a package lookup at the package root.
-    if (pkg.equals(PathFragment.EMPTY_FRAGMENT)) {
-      return PackageLookupValue.invalidPackageName("The empty package name is invalid");
-    }
-
     String pkgName = pkg.getPathString();
     String packageNameErrorMsg = LabelValidator.validatePackageName(pkgName);
     if (packageNameErrorMsg != null) {