storage: Add public Directory.exists() method

1 files changed, 12 insertions, 0 deletions

diff --git a/src/buildstream/storage/directory.py b/src/buildstream/storage/directory.py
index 55cc717f2..a9249baee 100644
--- a/src/buildstream/storage/directory.py
+++ b/src/buildstream/storage/directory.py
@@ -196,6 +196,18 @@ class Directory:
         and effective space used may be lower than this number due to deduplication. """
         raise NotImplementedError()
 
+    def exists(self, *paths: str, follow_symlinks: bool = False) -> bool:
+        """ Check whether the specified path exists.
+
+        Args:
+          *paths: A list of strings which are all path components.
+          follow_symlinks: True to follow symlinks.
+
+        Returns:
+          True if the path exists, False otherwise.
+        """
+        raise NotImplementedError()
+
 
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