Handle Oauth2 ImplementationUnavailableError in google_tasks

[wmoss]

Proposed change

As described in much more detail in PR #154579 and this blog post, previously, if there was no internet and the call to fetch cloud services fail, integrations like this one using cloud oauth2 would terminally fail. #154579 introduced config_entry_oauth2_flow.ImplementationUnavailableError and raises it in that specific case. This catches that error and raises ConfigEntryNotReady so that the configuration will be retried when internet is available again.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue: Fix account link no internet on startup #154579
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

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[home-assistant]

Hey there @allenporter, mind taking a look at this pull request as it has been labeled with an integration (google_tasks) you are listed as a code owner for? Thanks!

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[Copilot]

Pull request overview

Updates the google_tasks integration to gracefully handle the “no OAuth implementation available” startup condition introduced in #154579 by retrying setup instead of failing permanently.

Changes:

• Catch config_entry_oauth2_flow.ImplementationUnavailableError during entry setup and raise ConfigEntryNotReady to trigger setup retries.
• Add a localized exception message key (oauth2_implementation_unavailable) for the integration.
• Add a regression test that verifies the config entry moves to SETUP_RETRY when the OAuth implementation is unavailable.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
homeassistant/components/google_tasks/__init__.py	Converts OAuth implementation unavailability into ConfigEntryNotReady for automatic retry behavior.
homeassistant/components/google_tasks/strings.json	Adds an exceptions.oauth2_implementation_unavailable message mapping to the common string.
tests/components/google_tasks/test_init.py	Adds coverage for the new retry-on-unavailable-implementation behavior.