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Validate config values for arrays and hashes #898

merged 1 commit into from Apr 13, 2022


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@Morriar Morriar commented Apr 12, 2022


Since we write Tapioca config as a YAML file, it's easy to make type errors that will result in unexpected behaviors.

For example, even if this config file looks ok, the msgpack gem will not be turned typed: false:

    msgpack: false

Because we expect the values inside the typed_overrides hash to be strings rather than booleans.

This actually happened today to one of our users: #895 (comment). Having an error message earlier would have saved both of us some time and confusion.


The solution choose here seems a bit hack-ish but we can't rely on Thor expected types for the content of :array and :hash options:

Once we validated all others criteria for options keys and values we add an additional check for arrays and hashes to make sure the values (and keys in the case of a hash) are all of the type String.

Even if rather limited, this works in practice because the only arrays and hashes we take in the config always expect string (iirc?).

I guess we can revisit this later if we add different options but I'm open to better suggestions.


See automated tests.

Signed-off-by: Alexandre Terrasa <>
@Morriar Morriar added the enhancement label Apr 12, 2022
@Morriar Morriar requested a review from Apr 12, 2022
@Morriar Morriar self-assigned this Apr 12, 2022
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@paracycle paracycle left a comment

Nice one, thanks!

@Morriar Morriar merged commit 3ab0f4e into main Apr 13, 2022
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@Morriar Morriar deleted the at-check-config-values branch Apr 13, 2022
@shopify-shipit shopify-shipit bot temporarily deployed to production May 13, 2022 Inactive
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3 participants