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Docs for --install-types do not explain no mypy cache directory error #10863

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cclauss opened this issue Jul 24, 2021 · 3 comments
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Docs for --install-types do not explain no mypy cache directory error #10863

cclauss opened this issue Jul 24, 2021 · 3 comments
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@cclauss
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cclauss commented Jul 24, 2021 •
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Documentation

Docs for --install-types and --non-interactive do not mention .mypy-cache yet these options often fail (esp. in GitHub Actions, tox, pre-commit) with error: --install-types failed (no mypy cache directory) even after mkdir .mypy_cache has been run. The user may then experience a tremendous feeling of helplessness.

Probably caused by #10768 but the docs should help the user understand the misleading error message.
@Zburatorul Zburatorul mentioned this issue Jan 17, 2022
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@ddelange
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ddelange commented Jan 8, 2023

Updated our make lint target with explicit cache in current working dir (install + lint in one command):

python -m mypy --install-types --non-interactive --cache-dir=.mypy_cache/

that got our CI green, would be a good default imo (e.g. behind the --non-interactive flag)

@martinhoyer martinhoyer mentioned this issue Apr 6, 2023
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@hauntsaninja hauntsaninja mentioned this issue Nov 12, 2023
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ferrarimarco added a commit to super-linter/super-linter that referenced this issue Feb 6, 2024
@ferrarimarco
fix: create mypy cache directory
ad102f6 
MyPy expects the cache directory to be there. We now remove it after
each super-linter run to avoid leftovers, so we need to create it before
runniny MyPy.

See python/mypy#10768
and python/mypy#10863
@ferrarimarco ferrarimarco mentioned this issue Feb 6, 2024
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ferrarimarco added a commit to super-linter/super-linter that referenced this issue Feb 6, 2024
@ferrarimarco
fix: create mypy cache directory
8eea840 
MyPy expects the cache directory to be there. We now remove it after
each super-linter run to avoid leftovers, so we need to create it before
running MyPy.

See python/mypy#10768
and python/mypy#10863
ferrarimarco added a commit to super-linter/super-linter that referenced this issue Feb 6, 2024
@ferrarimarco
fix: create mypy cache directory (#5240)
38edbe5 
MyPy expects the cache directory to be there. We now remove it after
each super-linter run to avoid leftovers, so we need to create it before
running MyPy.

See python/mypy#10768
and python/mypy#10863
@ScottLinnn
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Is this fixed? I'm encountering the same error.

@jtherrmann jtherrmann mentioned this issue Dec 13, 2024
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@M-PRANAY
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M-PRANAY commented Jan 6, 2025

I am still encountering the same error.
(dev) PS C:\Users{***}> mypy --install-types --non-interactive src --cache-dir=.mypy_cache/
error: --install-types failed (no mypy cache directory)

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@cclauss @hauntsaninja @ddelange @ScottLinnn @M-PRANAY