Introduce Path#isSpecialFile, FileSystem#isSpecialFile, and FileStatus#isSpecialFile to help disambiguate between a regular file and a special file, since the file size of a special file cannot be trusted.
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MOS_MIGRATED_REVID=105903622
diff --git a/src/main/java/com/google/devtools/build/lib/vfs/UnionFileSystem.java b/src/main/java/com/google/devtools/build/lib/vfs/UnionFileSystem.java
index b774543..a1ef71f 100644
--- a/src/main/java/com/google/devtools/build/lib/vfs/UnionFileSystem.java
+++ b/src/main/java/com/google/devtools/build/lib/vfs/UnionFileSystem.java
@@ -248,6 +248,12 @@
}
@Override
+ protected boolean isSpecialFile(Path path, boolean followSymlinks) {
+ FileSystem delegate = getDelegate(path);
+ return delegate.isSpecialFile(adjustPath(path, delegate), followSymlinks);
+ }
+
+ @Override
protected void createSymbolicLink(Path linkPath, PathFragment targetFragment) throws IOException {
checkModifiable();
if (!supportsSymbolicLinks()) {
