26 lines
1.1 KiB
Go
26 lines
1.1 KiB
Go
package terraform
|
|
|
|
import (
|
|
"github.com/hashicorp/terraform/internal/addrs"
|
|
"github.com/hashicorp/terraform/internal/tfdiags"
|
|
)
|
|
|
|
// GraphWalker is an interface that can be implemented that when used
|
|
// with Graph.Walk will invoke the given callbacks under certain events.
|
|
type GraphWalker interface {
|
|
EvalContext() EvalContext
|
|
EnterPath(addrs.ModuleInstance) EvalContext
|
|
ExitPath(addrs.ModuleInstance)
|
|
Execute(EvalContext, GraphNodeExecutable) tfdiags.Diagnostics
|
|
}
|
|
|
|
// NullGraphWalker is a GraphWalker implementation that does nothing.
|
|
// This can be embedded within other GraphWalker implementations for easily
|
|
// implementing all the required functions.
|
|
type NullGraphWalker struct{}
|
|
|
|
func (NullGraphWalker) EvalContext() EvalContext { return new(MockEvalContext) }
|
|
func (NullGraphWalker) EnterPath(addrs.ModuleInstance) EvalContext { return new(MockEvalContext) }
|
|
func (NullGraphWalker) ExitPath(addrs.ModuleInstance) {}
|
|
func (NullGraphWalker) Execute(EvalContext, GraphNodeExecutable) tfdiags.Diagnostics { return nil }
|