Since the state models can't preserve unknown values, we need to rely on the plan to persist these until the effective configuration can be fully resolved during the apply phase.
If plan and apply are both run against the same context then we still have
the planned output values in memory while we're doing the apply walk, so
we need to make sure to update them along with the state as we learn the
final known values of each output.
There were actually two different bugs here:
- We weren't removing any existing planned change for an output when
setting a new one. In retrospect a map would've been a better data
structure for the output changes, rather than a slice to mimic what we
do for resource instance objects, but for now we'll leave the structures
alone and clean up as needed. (The set of outputs should be small for
any reasonable configuration, so the main impact of this is some ugly
code in RemoveOutputChange.)
- RemoveOutputChange itself had a bug where it was iterating over the
resource changes rather than the output changes. This didn't matter
before because we weren't actually using that function, but now we are.
This fix is confirmed by restoring various existing context apply tests
back to passing again.
This new source type should be used for variables loaded from .tfvars files that were explicitly passed as command line arguments (e.g. -var-file=foo.tfvars)
Just as when we resolve single output values we must check to see if there
is a planned new value for an output before using the value in state,
because the planned new value might contain unknowns that can't be
represented directly in the state (and would thus be incorrectly returned
as null).
Booleans in the legacy form were stored as strings, and can appear as
the incorrect type in the new type system.
Unset fields in sets also might show up erroneously in diffs, with
equal old and new values.
helper/schema will remove "timeouts" from the config, and stash them in
the diff.Meta map. Terraform sees "timeouts" as a regular config block,
so needs them to be present in the state in order to not show a diff.
Have the GRPCProviderServer shim copy all timeout values into any state
it returns to provide consistent diffs in core.
Resource timeouts were a separate config block, but did not exist in the
resource schema. Insert any defined timeouts when generating the
configshema.Block so that the fields can be accepted and validated by
core.
Martin Atkins