command/show (json): marshal the state snapshot included with the plan file #21597
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The planfile contains a state snapshot with certain resources updated (outputs and datasources). Previously `terraform show -json PLANFILE` was using the current state instead of the state inside the plan as intended. This caused an issue when the state included a terraform_remote_state datasource. The datasource's state gets refreshed - and therefore upgraded to the current state version - during plan, but that won't persist to state until apply.
pselle
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Jun 4, 2019
apparentlymart
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Jun 4, 2019
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A terraform planfile contains a state snapshot with certain resources updated
(those which get refreshed before plan, such as outputs and datasources).
Previously
terraform show -json $PLANFILEwas displaying the current state instead of the planfile's state.This caused an issue when the state included a
terraform_remote_statedatasource. The datasource's state gets refreshed - and therefore
upgraded to the current state version - during plan, but that won't
persist to state until apply.
In most cases, the json state parser can handle resources in state that haven't been upgraded yet. This particular problem is specific to
terraform_remote_statedatasources due to their unusual and unique schemas, which includecty.DynamicPseudoType- the decoder could not translate the older flatmap-style state without a preciseType