Simon Westphahl c98f14025a Fix read-only branches error in zuul-web ... When exclude-unprotected-branche is in effect and a project doesn't have any protected branches (e.g. a wrong branch protection rule in Github or none at all) the branch cache will contain an empty list. Since the empty list was so far used to indicate a fetch error, those projects showed up with a config error in zuul-web ("Will not fetch project branches as read-only is set"). For the branch cache we need to distinguish three different cases: 1. branche cache miss (no fetch yet) 2. branch cache hit (including empty list of branches) 3. fetch error Instead of storing an empty list in case of a fetch error we will store a sentinel value of `None` in those cases. However, with this change we can't use `None` as an indicator for a cache miss anymore, so we are now raising a `LookupError` instead. Change-Id: I5b51805f7d0a5d916a46fe89db7b32f14063d7aa		2022-07-04 11:35:36 +02:00
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__init__.py	Fix read-only branches error in zuul-web	2022-07-04 11:35:36 +02:00