opentofu/internal/lang/eval
Martin Atkins e879e9060f configgraph: Only ask ResourceInstanceGlue once for each value
Most of what we interact with in configgraph is other parts of the
evaluator that automatically get memoized by patterns like OnceValuer, but
the value for a resource instance is always provided by something outside
of the evaluator that won't typically be able to use those mechanisms, and
so the evaluator's ResourceInstance.Value implementation will now provide
memoization on behalf of that external component, to ensure that we end
up with only one value for each resource instance regardless of how that
external component behaves.

In the case of the current planning phase, in particular this means that
we'll now only try to plan each resource instance once, whereas before
we would ask it to make a separate plan for each call to Value.

For now this is just retrofitted in an minimally-invasive way as part of
our "walking skeleton" phase where we're just trying to wire the existing
parts together end-to-end and then decide at the end whether we want to
refactor things more. If this need for general-purpose memoization ends
up appearing in other places too then maybe we'll choose to structure this
a little differently.

Signed-off-by: Martin Atkins <mart@degeneration.co.uk>
2025-12-12 07:03:52 -08:00
..
internal configgraph: Only ask ResourceInstanceGlue once for each value 2025-12-12 07:03:52 -08:00
bench_many_instances_test.go lang/evalglue: Different approach to EvalContext defaults for tests 2025-10-27 10:15:41 -07:00
config.go backend/local: Use experimental runtime for planning, when enabled 2025-11-21 09:20:59 -08:00
config_apply.go lang/eval: Clear some linter warnings 2025-10-27 10:15:41 -07:00
config_dependencies.go lang/eval: Clear some linter warnings 2025-10-27 10:15:41 -07:00
config_plan.go Split out provider schemas vs instances in new engine (#3530) 2025-12-01 13:09:58 -05:00
config_plan_oracle.go engine/planning: Provider instances and stub of data resource planning 2025-10-27 10:15:41 -07:00
config_plan_test.go Split out provider schemas vs instances in new engine (#3530) 2025-12-01 13:09:58 -05:00
config_prepare.go Split out provider schemas vs instances in new engine (#3530) 2025-12-01 13:09:58 -05:00
config_prepare_test.go lang/eval: Provider instance to ephemeral resource instance dependencies 2025-10-27 10:15:41 -07:00
config_test.go lang/eval: Validate basics working and some other API stubbing 2025-10-27 10:15:41 -07:00
config_validate.go lang/eval: Stub of ConfigInstance.prepareToPlan 2025-10-27 10:15:41 -07:00
config_validate_test.go lang/eval: Some deeper stubbing out of the DrivePlanning design 2025-10-27 10:15:41 -07:00
doc.go lang/eval: Beginnings of a different way to handle config eval 2025-10-27 10:15:41 -07:00
eval.go lang/eval: Start of splitting the "compile" layer into its own package 2025-10-27 10:15:41 -07:00
eval_context.go Split out provider schemas vs instances in new engine (#3530) 2025-12-01 13:09:58 -05:00
provider_instance.go lang/eval: Work-in-progress changes to modeling of module tree 2025-10-27 10:15:41 -07:00
resource_instance.go lang/eval: Some deeper stubbing out of the DrivePlanning design 2025-10-27 10:15:41 -07:00
testing.go lang/eval: Start of supporting module calls 2025-10-27 10:15:41 -07:00