terraform

Commit Graph

Author	SHA1	Message	Date
Martin Atkins	88e76fa9ef	configs/configschema: Introduce the NestingGroup mode for blocks In study of existing providers we've found a pattern we werent previously accounting for of using a nested block type to represent a group of arguments that relate to a particular feature that is always enabled but where it improves configuration readability to group all of its settings together in a nested block. The existing NestingSingle was not a good fit for this because it is designed under the assumption that the presence or absence of the block has some significance in enabling or disabling the relevant feature, and so for these always-active cases we'd generate a misleading plan where the settings for the feature appear totally absent, rather than showing the default values that will be selected. NestingGroup is, therefore, a slight variation of NestingSingle where presence vs. absence of the block is not distinguishable (it's never null) and instead its contents are treated as unset when the block is absent. This then in turn causes any default values associated with the nested arguments to be honored and displayed in the plan whenever the block is not explicitly configured. The current SDK cannot activate this mode, but that's okay because its "legacy type system" opt-out flag allows it to force a block to be processed in this way anyway. We're adding this now so that we can introduce the feature in a future SDK without causing a breaking change to the protocol, since the set of possible block nesting modes is not extensible.	7 years ago
Martin Atkins	87fe6cbecd	plans/objchange: Don't panic when prior state contains nested map blocks We were using the wrong cty operation to access map members, causing a panic whenever a prior value was present for a resource type with a nested block backed by a map value.	7 years ago
Martin Atkins	e831182c8d	plans/objchange: Hide sensitive attribute values in error messages Since these error messages get printed in Terraform's output and we encourage users to share them as part of bug reports, we should avoid including sensitive information in them to reduce the risk of accidental exposure.	7 years ago
Martin Atkins	fec6e0328d	plans/objchange: AssertPlanValid function Completing our set of provider result safety-check functions, AssertPlanValid checks a result from a provider's PlanResourceChange to make sure it doesn't propose a change that is not valid within the user model of Terraform. Specifically, it forbids the provider from planning a value that contradicts what the user gave in configuration, which is important to ensure that making a reference to an attribute elsewhere in the configuration will produce exactly the given result, as users reasonably expect. Providers _are_ allowed (and, in fact, required) to make changes to any Computed attribute values declared in the schema in order to fill in the default values that the provider has generated. Later checks during the apply phase will ensure that the provider remains true to these planned values, to ensure that Terraform can keep its promise of doing exactly what was planned or presenting an error explaining why not.	7 years ago

4 Commits (653a819cc3a2d2c7fb3f6a26b03f4e8a95e4d585)