116 lines
3.5 KiB
Go
116 lines
3.5 KiB
Go
package terraform
|
|
|
|
import (
|
|
"github.com/hashicorp/terraform/addrs"
|
|
"github.com/hashicorp/terraform/configs"
|
|
"github.com/hashicorp/terraform/dag"
|
|
"github.com/hashicorp/terraform/states"
|
|
"github.com/hashicorp/terraform/tfdiags"
|
|
)
|
|
|
|
// EvalGraphBuilder implements GraphBuilder and constructs a graph suitable
|
|
// for evaluating in-memory values (input variables, local values, output
|
|
// values) in the state without any other side-effects.
|
|
//
|
|
// This graph is used only in weird cases, such as the "terraform console"
|
|
// CLI command, where we need to evaluate expressions against the state
|
|
// without taking any other actions.
|
|
//
|
|
// The generated graph will include nodes for providers, resources, etc
|
|
// just to allow indirect dependencies to be resolved, but these nodes will
|
|
// not take any actions themselves since we assume that their parts of the
|
|
// state, if any, are already complete.
|
|
//
|
|
// Although the providers are never configured, they must still be available
|
|
// in order to obtain schema information used for type checking, etc.
|
|
type EvalGraphBuilder struct {
|
|
// Config is the configuration tree.
|
|
Config *configs.Config
|
|
|
|
// State is the current state
|
|
State *states.State
|
|
|
|
// Components is a factory for the plug-in components (providers and
|
|
// provisioners) available for use.
|
|
Components contextComponentFactory
|
|
|
|
// Schemas is the repository of schemas we will draw from to analyse
|
|
// the configuration.
|
|
Schemas *Schemas
|
|
}
|
|
|
|
// See GraphBuilder
|
|
func (b *EvalGraphBuilder) Build(path addrs.ModuleInstance) (*Graph, tfdiags.Diagnostics) {
|
|
return (&BasicGraphBuilder{
|
|
Steps: b.Steps(),
|
|
Validate: true,
|
|
Name: "EvalGraphBuilder",
|
|
}).Build(path)
|
|
}
|
|
|
|
// See GraphBuilder
|
|
func (b *EvalGraphBuilder) Steps() []GraphTransformer {
|
|
concreteProvider := func(a *NodeAbstractProvider) dag.Vertex {
|
|
return &NodeEvalableProvider{
|
|
NodeAbstractProvider: a,
|
|
}
|
|
}
|
|
|
|
steps := []GraphTransformer{
|
|
// Creates all the data resources that aren't in the state. This will also
|
|
// add any orphans from scaling in as destroy nodes.
|
|
&ConfigTransformer{
|
|
Concrete: nil, // just use the abstract type
|
|
Config: b.Config,
|
|
Unique: true,
|
|
},
|
|
|
|
// Attach the state
|
|
&AttachStateTransformer{State: b.State},
|
|
|
|
// Attach the configuration to any resources
|
|
&AttachResourceConfigTransformer{Config: b.Config},
|
|
|
|
// Add root variables
|
|
&RootVariableTransformer{Config: b.Config},
|
|
|
|
// Add the local values
|
|
&LocalTransformer{Config: b.Config},
|
|
|
|
// Add the outputs
|
|
&OutputTransformer{Config: b.Config},
|
|
|
|
// Add module variables
|
|
&ModuleVariableTransformer{Config: b.Config},
|
|
|
|
TransformProviders(b.Components.ResourceProviders(), concreteProvider, b.Config),
|
|
|
|
// Must attach schemas before ReferenceTransformer so that we can
|
|
// analyze the configuration to find references.
|
|
&AttachSchemaTransformer{Schemas: b.Schemas, Config: b.Config},
|
|
|
|
// Create expansion nodes for all of the module calls. This must
|
|
// come after all other transformers that create nodes representing
|
|
// objects that can belong to modules.
|
|
&ModuleExpansionTransformer{
|
|
Config: b.Config,
|
|
},
|
|
|
|
// Connect so that the references are ready for targeting. We'll
|
|
// have to connect again later for providers and so on.
|
|
&ReferenceTransformer{},
|
|
|
|
// Although we don't configure providers, we do still start them up
|
|
// to get their schemas, and so we must shut them down again here.
|
|
&CloseProviderTransformer{},
|
|
|
|
// Close root module
|
|
&CloseRootModuleTransformer{},
|
|
|
|
// Remove redundant edges to simplify the graph.
|
|
&TransitiveReductionTransformer{},
|
|
}
|
|
|
|
return steps
|
|
}
|