diff options
Diffstat (limited to 'morphlib/artifactcachereference.py')
| -rw-r--r-- | morphlib/artifactcachereference.py | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/morphlib/artifactcachereference.py b/morphlib/artifactcachereference.py index 4cc73290..d4b239d5 100644 --- a/morphlib/artifactcachereference.py +++ b/morphlib/artifactcachereference.py @@ -18,26 +18,24 @@ class ArtifactCacheReference(object): '''Represent the information needed to retrieve an artifact The artifact cache doesn't need to know the dependencies or the - morphology of an artifact, it just needs to know the cache key, - name and kind. + morphology of an artifact, it just needs to know the basename + + The basename could be generated, from the name, cache_key and kind, + but if the algorithm changes then morph wouldn't be able to find + old artifacts with a saved ArtifactCacheReference. + + Conversely if it generated the basename then old strata wouldn't be + able to refer to new chunks, but strata change more often than the chunks. ''' - def __init__(self, name, cache_key, kind): - self.name = name - self.cache_key = cache_key - self.kind = kind + def __init__(self, basename): + self._basename = basename def basename(self): - return '%s.%s.%s' % (self.cache_key, - self.kind, - self.name) + return self._basename def metadata_basename(self, metadata_name): - return '%s.%s.%s.%s' % (self.cache_key, - self.kind, - self.name, - metadata_name) + return '%s.%s' % (self._basename, metadata_name) @classmethod def from_artifact(klass, artifact): - return klass(artifact.name, artifact.cache_key, - artifact.source.morphology['kind']) + return klass(artifact.basename()) |