opentofu/terraform/graph_builder_plan.go
James Bardin 4d2da4d733 connect non-resources to providers they reference
Any non-resource (outputs, variables, locals) that references a resource
type must also be connected to that resources provider. This is required
during apply, because the graph built from the diff may not include the
referenced resources because they are being evaluated from the state.

If the provider isn't present already, add a NodeEvalableProvider to
fetch the provider schema.

The provider transformers now need to happen after the outputs, locals,
and variables are transformed.
2018-10-16 18:49:20 -07:00

182 lines
4.7 KiB
Go

package terraform
import (
"sync"
"github.com/hashicorp/terraform/tfdiags"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/configs"
"github.com/hashicorp/terraform/dag"
)
// PlanGraphBuilder implements GraphBuilder and is responsible for building
// a graph for planning (creating a Terraform Diff).
//
// The primary difference between this graph and others:
//
// * Based on the config since it represents the target state
//
// * Ignores lifecycle options since no lifecycle events occur here. This
// simplifies the graph significantly since complex transforms such as
// create-before-destroy can be completely ignored.
//
type PlanGraphBuilder struct {
// Config is the configuration tree to build a plan from.
Config *configs.Config
// State is the current state
State *State
// Components is a factory for the plug-in components (providers and
// provisioners) available for use.
Components contextComponentFactory
// Targets are resources to target
Targets []addrs.Targetable
// DisableReduce, if true, will not reduce the graph. Great for testing.
DisableReduce bool
// Validate will do structural validation of the graph.
Validate bool
// CustomConcrete can be set to customize the node types created
// for various parts of the plan. This is useful in order to customize
// the plan behavior.
CustomConcrete bool
ConcreteProvider ConcreteProviderNodeFunc
ConcreteResource ConcreteResourceNodeFunc
ConcreteResourceOrphan ConcreteResourceInstanceNodeFunc
once sync.Once
}
// See GraphBuilder
func (b *PlanGraphBuilder) Build(path addrs.ModuleInstance) (*Graph, tfdiags.Diagnostics) {
return (&BasicGraphBuilder{
Steps: b.Steps(),
Validate: b.Validate,
Name: "PlanGraphBuilder",
}).Build(path)
}
// See GraphBuilder
func (b *PlanGraphBuilder) Steps() []GraphTransformer {
b.once.Do(b.init)
steps := []GraphTransformer{
// Creates all the resources represented in the config
&ConfigTransformer{
Concrete: b.ConcreteResource,
Config: b.Config,
},
// Add the local values
&LocalTransformer{Config: b.Config},
// Add the outputs
&OutputTransformer{Config: b.Config},
// Add orphan resources
&OrphanResourceTransformer{
Concrete: b.ConcreteResourceOrphan,
State: b.State,
Config: b.Config,
},
// Create orphan output nodes
&OrphanOutputTransformer{
Config: b.Config,
State: b.State,
},
// Attach the configuration to any resources
&AttachResourceConfigTransformer{Config: b.Config},
// Attach the state
&AttachStateTransformer{State: b.State},
// Add root variables
&RootVariableTransformer{Config: b.Config},
&MissingProvisionerTransformer{Provisioners: b.Components.ResourceProvisioners()},
&AttachSchemaTransformer{Components: b.Components},
// Add module variables
&ModuleVariableTransformer{
Config: b.Config,
},
TransformProviders(b.Components.ResourceProviders(), b.ConcreteProvider, b.Config),
// Remove modules no longer present in the config
&RemovedModuleTransformer{Config: b.Config, State: b.State},
// Must be before ReferenceTransformer, since schema is required to
// extract references from config.
&AttachSchemaTransformer{Components: b.Components},
// Connect so that the references are ready for targeting. We'll
// have to connect again later for providers and so on.
&ReferenceTransformer{},
// Add the node to fix the state count boundaries
&CountBoundaryTransformer{},
// Target
&TargetsTransformer{
Targets: b.Targets,
// Resource nodes from config have not yet been expanded for
// "count", so we must apply targeting without indices. Exact
// targeting will be dealt with later when these resources
// DynamicExpand.
IgnoreIndices: true,
},
// Close opened plugin connections
&CloseProviderTransformer{},
&CloseProvisionerTransformer{},
// Single root
&RootTransformer{},
}
if !b.DisableReduce {
// Perform the transitive reduction to make our graph a bit
// more sane if possible (it usually is possible).
steps = append(steps, &TransitiveReductionTransformer{})
}
return steps
}
func (b *PlanGraphBuilder) init() {
// Do nothing if the user requests customizing the fields
if b.CustomConcrete {
return
}
b.ConcreteProvider = func(a *NodeAbstractProvider) dag.Vertex {
return &NodeApplyableProvider{
NodeAbstractProvider: a,
}
}
b.ConcreteResource = func(a *NodeAbstractResource) dag.Vertex {
return &NodePlannableResource{
NodeAbstractResource: a,
Components: b.Components,
}
}
b.ConcreteResourceOrphan = func(a *NodeAbstractResourceInstance) dag.Vertex {
return &NodePlannableResourceInstanceOrphan{
NodeAbstractResourceInstance: a,
}
}
}