cascache.py: Always update mtime in contains_directory()

This is required for LRU cache expiry.

2 files changed, 8 insertions, 12 deletions

diff --git a/src/buildstream/_artifact.py b/src/buildstream/_artifact.py
index 1e3e39b8f..e5174eaea 100644
--- a/src/buildstream/_artifact.py
+++ b/src/buildstream/_artifact.py
@@ -424,7 +424,7 @@ class Artifact():
 
         # Check whether 'files' subdirectory is available, with or without file contents
         if (require_directories and str(artifact.files) and
-                not self._cas.contains_directory(artifact.files, with_files=require_files, update_mtime=True)):
+                not self._cas.contains_directory(artifact.files, with_files=require_files)):
             self._cached = False
             return False
 
diff --git a/src/buildstream/_cas/cascache.py b/src/buildstream/_cas/cascache.py
index 4ee575d05..b2158597e 100644
--- a/src/buildstream/_cas/cascache.py
+++ b/src/buildstream/_cas/cascache.py
@@ -251,33 +251,29 @@ class CASCache():
     # Args:
     #     digest (Digest): The directory digest to check
     #     with_files (bool): Whether to check files as well
-    #     update_mtime (bool): Whether to update the timestamp
     #
     # Returns: True if the directory is available in the local cache
     #
-    def contains_directory(self, digest, *, with_files, update_mtime=False):
+    def contains_directory(self, digest, *, with_files):
         try:
             directory = remote_execution_pb2.Directory()
             path = self.objpath(digest)
             with open(path, 'rb') as f:
                 directory.ParseFromString(f.read())
-                if update_mtime:
-                    os.utime(f.fileno())
+                os.utime(f.fileno())
 
             # Optionally check presence of files
             if with_files:
                 for filenode in directory.files:
                     path = self.objpath(filenode.digest)
-                    if update_mtime:
-                        # No need for separate `exists()` call as this will raise
-                        # FileNotFoundError if the file does not exist.
-                        os.utime(path)
-                    elif not os.path.exists(path):
-                        return False
+
+                    # No need for separate `exists()` call as this will raise
+                    # FileNotFoundError if the file does not exist.
+                    os.utime(path)
 
             # Check subdirectories
             for dirnode in directory.directories:
-                if not self.contains_directory(dirnode.digest, with_files=with_files, update_mtime=update_mtime):
+                if not self.contains_directory(dirnode.digest, with_files=with_files):
                     return False
 
             return True