diff options
Diffstat (limited to 'src/buildstream/plugins/sources/workspace.py')
-rw-r--r-- | src/buildstream/plugins/sources/workspace.py | 53 |
1 files changed, 39 insertions, 14 deletions
diff --git a/src/buildstream/plugins/sources/workspace.py b/src/buildstream/plugins/sources/workspace.py index 44d0889b3..df24abb91 100644 --- a/src/buildstream/plugins/sources/workspace.py +++ b/src/buildstream/plugins/sources/workspace.py @@ -37,30 +37,21 @@ workspace. The node constructed would be specified as follows: import os -from buildstream.storage.directory import Directory -from buildstream import Source, SourceError +from buildstream import Source, SourceError, Directory, MappingNode from buildstream.types import SourceRef -from buildstream.node import MappingNode class WorkspaceSource(Source): # pylint: disable=attribute-defined-outside-init BST_MIN_VERSION = "2.0" - BST_STAGE_VIRTUAL_DIRECTORY = True - BST_KEY_REQUIRES_STAGE = True - # Cached unique key - __unique_key = None # the digest of the Directory following the import of the workspace __digest = None # the cache key of the last workspace build __last_build = None - def track(self) -> SourceRef: # pylint: disable=arguments-differ - return None - def configure(self, node: MappingNode) -> None: node.validate_keys(["path", "last_build", "kind"]) self.path = node.get_str("path") @@ -75,6 +66,21 @@ class WorkspaceSource(Source): def is_resolved(self): return os.path.exists(self._get_local_path()) + def get_unique_key(self): + # + # As a core plugin, we use some private API to optimize file hashing. + # + # * Use Source._cache_directory() to prepare a Directory + # * Do the regular staging activity into the Directory + # * Use the hash of the cached digest as the unique key + # + if not self.__digest: + with self._cache_directory() as directory: + self.__do_stage(directory) + self.__digest = directory._get_digest() + + return self.__digest.hash + def get_ref(self) -> None: return None @@ -93,7 +99,29 @@ class WorkspaceSource(Source): def fetch(self) -> None: # pylint: disable=arguments-differ pass # pragma: nocover - def stage(self, directory: Directory) -> None: + def stage(self, directory): + # + # We've already prepared the CAS while resolving the cache key which + # will happen before staging. + # + # Now just retrieve the previously cached content to stage. + # + assert isinstance(directory, Directory) + assert self.__digest is not None + with self._cache_directory(digest=self.__digest) as cached_directory: + directory.import_files(cached_directory) + + # As a core element, we speed up some scenarios when this is used for + # a junction, by providing the local path to this content directly. + # + def _get_local_path(self) -> str: + return self.path + + # Staging is implemented internally, we preemptively put it in the CAS + # as a side effect of resolving the cache key, at stage time we just + # do an internal CAS stage. + # + def __do_stage(self, directory: Directory) -> None: assert isinstance(directory, Directory) with self.timed_activity("Staging local files"): result = directory.import_files(self.path, properties=["mtime"]) @@ -103,9 +131,6 @@ class WorkspaceSource(Source): "Failed to stage source: files clash with existing directory", reason="ensure-stage-dir-fail" ) - def _get_local_path(self) -> str: - return self.path - # Plugin entry point def setup() -> WorkspaceSource: |