jurplel/install-qt-action@v4 invokes actions/setup-python internally
with the same `cache:` value the user passes to the Qt action. Our
`cache: true` (intended for Qt's own install cache) gets propagated
verbatim, so setup-python receives `cache: 'true'` — which it rejects
with "Caching for 'true' is not supported" because the only valid
values are 'pip' / 'pipenv' / 'poetry'. Surfaces consistently on
Gitea/Forgejo's act-runner.
Workaround: provide our own actions/setup-python@v5 step (Python is
needed for aqtinstall, the tool install-qt-action uses to fetch Qt),
and set `setup-python: false` on the Qt action so it skips the
broken internal call. Qt's own install cache (the `cache: true` we
actually want) keeps working.
Applied to both .gitea/workflows/ci.yml and .gitea/workflows/release.yml.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
magdev
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