We were previously catching some errors at read time, but some type errors
were panicking because the cty.DynamicPseudoType arguments have no
automatic pre-type-checking done but this code was assuming they would
be objects.
Here we add an explicit validation step that includes both the backend
validation we were previously doing during read and some additional
type checking to ensure the two dynamic arguments are suitably-typed.
Having the separate validation step means that these problems can be
detected by "terraform validate", rather than only in "terraform plan"
or "terraform apply".
This mirrors the change made for providers, so that default values can
be inserted into the config by the backend implementation. This is only
the interface and method name changes, it does not yet add any default
values.
Due to how often the state and plan types are referenced throughout
Terraform, there isn't a great way to switch them out gradually. As a
consequence, this huge commit gets us from the old world to a _compilable_
new world, but still has a large number of known test failures due to
key functionality being stubbed out.
The stubs here are for anything that interacts with providers, since we
now need to do the follow-up work to similarly replace the old
terraform.ResourceProvider interface with its replacement in the new
"providers" package. That work, along with work to fix the remaining
failing tests, will follow in subsequent commits.
The aim here was to replace all references to terraform.State and its
downstream types with states.State, terraform.Plan with plans.Plan,
state.State with statemgr.State, and switch to the new implementations of
the state and plan file formats. However, due to the number of times those
types are used, this also ended up affecting numerous other parts of core
such as terraform.Hook, the backend.Backend interface, and most of the CLI
commands.
Just as with 5861dbf3fc49b19587a31816eb06f511ab861bb4 before, I apologize
in advance to the person who inevitably just found this huge commit while
spelunking through the commit history.
* builtin/providers: implement terraform remote state datasource as providers.Interface
* append and return diags separately (to match the idiomatic usage
elsewhere in Terraform)
* diagnostic summary style improvements
* update tests to pass config to schema.CoerceValue
* trust that the schema will be enforced and there is no need to check
that a given attribute exists
* added dataSourceRemoteStateGetSchema() (effectively replacing a
function that was inappropriately removed) for consistency with other
terraform providers
* builtin/provider terraform test: added InternalValidate() test for dataSourceRemoteStateGetSchema
The new config loader requires some steps to happen in a different
order, particularly in regard to knowing the schema in order to
decode the configuration.
Here we lean directly on the configschema package, rather than
on helper/schema.Backend as before, because it's generally
sufficient for our needs here and this prepares us for the
helper/schema package later moving out into its own repository
to seed a "plugin SDK".
The `remote` backend config contains an attribute that is defined as a `*schema.Set`, but currently only `string` values are accepted as the `config` attribute is defined as a `schema.TypeMap`.
Additionally the `b.Validate()` method wasn’t called to prevent a possible panic in case of unexpected configurations being passed to `b.Configure()`.
This commit is a bit of a hack to be able to support this in the 0.11 series. The 0.12 series will have proper support, so when merging 0.12 this should be reverted again.
The "terraform" provider was previously split out into its own repository,
but that turned out to be a mistake due to how tightly it depends on
aspects of Terraform Core.
Here we prepare to bring it back into the core repository by reorganizing
the directory layout to conform with what's expected there.
