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[Pather] handle empty or duplicate port lists

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Jan Petykiewicz 2026-07-12 15:18:00 -07:00
commit 306f0b4c83
1 changed files with 10 additions and 0 deletions
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masque/builder/pather.py
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@ -159,6 +159,16 @@ class Pather(PortList):
def _route_contexts(self, portspecs: Sequence[str]) -> tuple[RoutePortContext, ...]: def _route_contexts(self, portspecs: Sequence[str]) -> tuple[RoutePortContext, ...]:
"""Snapshot several ports in request order for bundle planning.""" """Snapshot several ports in request order for bundle planning."""
if not portspecs:
raise BuildError('Routing requires at least one port')
seen: set[str] = set()
duplicates: set[str] = set()
for portspec in portspecs:
if portspec in seen:
duplicates.add(portspec)
seen.add(portspec)
if duplicates:
raise BuildError(f'Routing port names must be unique; got duplicates: {sorted(duplicates)}')
return tuple(self._route_context(portspec) for portspec in portspecs) return tuple(self._route_context(portspec) for portspec in portspecs)
@property @property