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Fix fallback value for account_threepid_delegates.email #7316

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Apr 29, 2020
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Fix fallback value for account_threepid_delegates.email #7316

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c005181
Ensure account_threepid_delegate_email has a protocol scheme
anoadragon453 Apr 21, 2020
f63f76c
Changelog and lint
anoadragon453 Apr 21, 2020
4ffe175
mypy commands it
anoadragon453 Apr 21, 2020
ddf39b8
Allow trusted_third_party_id_server to be an empty list
anoadragon453 Apr 22, 2020
0cf3e7f
Fix type hinting and comment
anoadragon453 Apr 29, 2020
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1 change: 1 addition & 0 deletions changelog.d/7316.bugfix
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fixed backwards compatibility logic of the first value of `trusted_third_party_id_servers` being used for `account_threepid_delegates.email`, which occurs when the former, deprecated option is set and the latter is not.
11 changes: 8 additions & 3 deletions synapse/config/emailconfig.py
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Expand Up @@ -108,9 +108,14 @@ def read_config(self, config, **kwargs):
if self.trusted_third_party_id_servers:
# XXX: It's a little confusing that account_threepid_delegate_email is modified
# both in RegistrationConfig and here. We should factor this bit out
self.account_threepid_delegate_email = self.trusted_third_party_id_servers[
0
] # type: Optional[str]
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I removed Optional from this as self.account_threepid_delegate_email won't be assigned here if self.trusted_third_party_id_servers is falsey. But would mypy take this hint and apply it even if the code won't run?

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yes. the type information is static, and isn't affected by which code runs. In other words, the annotation here says "the type of Config.trusted_third_party_id_servers is str", and that is a thing that should hold true throughout the entire codebase. In this case, it's possible for trusted_third_party_id_servers to be None, so its type needs to stay as Optional[str].

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I think you meant account_threepid_delegate_email, but TIL, thanks!


first_trusted_identity_server = self.trusted_third_party_id_servers[0]

# trusted_third_party_id_servers does not contain a scheme whereas
# account_threepid_delegate_email is expected to. Presume https
self.account_threepid_delegate_email = (
"https://" + first_trusted_identity_server
) # type: Optional[str]
self.using_identity_server_from_trusted_list = True
else:
raise ConfigError(
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