opentofu/terraform/eval_output.go
Martin Atkins a3403f2766 terraform: Ugly huge change to weave in new State and Plan types
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.
2018-10-16 19:11:09 -07:00

69 lines
1.8 KiB
Go

package terraform
import (
"log"
"github.com/hashicorp/hcl2/hcl"
"github.com/zclconf/go-cty/cty"
"github.com/hashicorp/terraform/addrs"
)
// EvalDeleteOutput is an EvalNode implementation that deletes an output
// from the state.
type EvalDeleteOutput struct {
Addr addrs.OutputValue
}
// TODO: test
func (n *EvalDeleteOutput) Eval(ctx EvalContext) (interface{}, error) {
state := ctx.State()
if state == nil {
return nil, nil
}
state.RemoveOutputValue(n.Addr.Absolute(ctx.Path()))
return nil, nil
}
// EvalWriteOutput is an EvalNode implementation that writes the output
// for the given name to the current state.
type EvalWriteOutput struct {
Addr addrs.OutputValue
Sensitive bool
Expr hcl.Expression
// ContinueOnErr allows interpolation to fail during Input
ContinueOnErr bool
}
// TODO: test
func (n *EvalWriteOutput) Eval(ctx EvalContext) (interface{}, error) {
// This has to run before we have a state lock, since evaluation also
// reads the state
val, diags := ctx.EvaluateExpr(n.Expr, cty.DynamicPseudoType, nil)
// We'll handle errors below, after we have loaded the module.
state := ctx.State()
if state == nil {
return nil, nil
}
addr := n.Addr.Absolute(ctx.Path())
// handling the interpolation error
if diags.HasErrors() {
if n.ContinueOnErr || flagWarnOutputErrors {
log.Printf("[ERROR] Output interpolation %q failed: %s", n.Addr.Name, diags.Err())
// if we're continuing, make sure the output is included, and
// marked as unknown. If the evaluator was able to find a type
// for the value in spite of the error then we'll use it.
state.SetOutputValue(addr, cty.UnknownVal(val.Type()), n.Sensitive)
return nil, EvalEarlyExitError{}
}
return nil, diags.Err()
}
state.SetOutputValue(addr, val, n.Sensitive)
return nil, nil
}