Solo

generator/solo/realization.py

@@ -524,7 +524,7 @@ def checked_phrase(plan, draft, notes, contracts, incoming, harmony, tempo, edit
     return None
   features = evaluation.features(score_notes, previous=incoming.last if not shared else None, movement=travel + (incoming.travel if shared else 0))
   features.update(generator.solo.drafts.relationship_features(draft, notes))
-  if draft.lead_identity:
+  if draft.lead_identity or draft.source_phrase:
     supported = {e for feature in draft.features for e in feature.events}
     motions = [(a, b) for a, b in zip(notes, notes[1:]) if not (a.event_id in supported and b.event_id in supported)]
     features['contour'] = sum(min(1, max(0, abs(b.pitch.number() - a.pitch.number()) - 5) / 12) for a, b in motions) / max(1, len(motions))
@@ -861,8 +861,7 @@ def revise_pair(first, second, incoming, choices, sequences, tempo, context):
 def alternatives(plan, measures, choices, sequences, rhythms, tempo, previous=None, context=None):
   context = context if context is not None else SearchContext()
   if plan.treatment == 'lead':
-    from generator.solo import leads
-    return leads.alternatives(plan, measures, choices, sequences, tempo, previous, context)
+    raise ValueError('generic lead identities are retired; use composer.compose for source variations')
   # Keep resources alive while identity-keyed cache entries exist. A later
   # library cannot accidentally reuse the identity of a collected object.
   context.resources[id(sequences)] = sequences