Add split rules to sources

This introduces a new artifactsplitrule module, which tries to provide a
nice abstraction over matching a sequence of things to a bunch of
outputs, to be used by both chunks splitting, for separating files out
into chunk artifacts, the stratum splitting, where chunks are
aggregated into stratum artifacts, and systems selecting the right
strata to go into the artifact.

1 files changed, 7 insertions, 1 deletions

diff --git a/morphlib/source.py b/morphlib/source.py
index 8673af79..75a2e4de 100644
--- a/morphlib/source.py
+++ b/morphlib/source.py
@@ -31,6 +31,7 @@ class Source(object):
     * ``morphology`` -- the in-memory representation of the morphology we use
     * ``filename`` -- basename of the morphology filename
     * ``artifacts`` -- the set of artifacts this source produces.
+    * ``split_rules`` -- rules for splitting the source's produced artifacts
 
     '''
 
@@ -43,8 +44,13 @@ class Source(object):
         self.tree = tree
         self.morphology = morphology
         self.filename = filename
+
+        kind = morphology['kind']
+        unifier = getattr(morphlib.artifactsplitrule,
+                          'unify_%s_matches' % kind)
+        self.split_rules = unifier(morphology)
         self.artifacts = {name: morphlib.artifact.Artifact(self, name)
-                          for name in morphology.builds_artifacts}
+                          for name in self.split_rules.artifacts}
 
     def __str__(self):  # pragma: no cover
         return '%s|%s|%s' % (self.repo_name,