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Previously the graph builders all expected to be given a full manifest of all of the plugin component schemas that they could need during their analysis work. That made sense when terraform.NewContext would always proactively load all of the schemas before doing any other work, but we now have a load-as-needed strategy for schemas. We'll now have the graph builders use the contextPlugins object they each already hold to retrieve individual schemas when needed. This avoids the need to prepare a redundant data structure to pass alongside the contextPlugins object, and leans on the memoization behavior inside contextPlugins to preserve the old behavior of loading each provider's schema only once.
110 lines
3.8 KiB
Go
110 lines
3.8 KiB
Go
package terraform
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import (
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"fmt"
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"log"
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"github.com/hashicorp/terraform/internal/configs"
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"github.com/hashicorp/terraform/internal/configs/configschema"
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"github.com/hashicorp/terraform/internal/dag"
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)
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// GraphNodeAttachResourceSchema is an interface implemented by node types
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// that need a resource schema attached.
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type GraphNodeAttachResourceSchema interface {
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GraphNodeConfigResource
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GraphNodeProviderConsumer
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AttachResourceSchema(schema *configschema.Block, version uint64)
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}
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// GraphNodeAttachProviderConfigSchema is an interface implemented by node types
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// that need a provider configuration schema attached.
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type GraphNodeAttachProviderConfigSchema interface {
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GraphNodeProvider
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AttachProviderConfigSchema(*configschema.Block)
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}
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// GraphNodeAttachProvisionerSchema is an interface implemented by node types
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// that need one or more provisioner schemas attached.
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type GraphNodeAttachProvisionerSchema interface {
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ProvisionedBy() []string
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// SetProvisionerSchema is called during transform for each provisioner
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// type returned from ProvisionedBy, providing the configuration schema
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// for each provisioner in turn. The implementer should save these for
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// later use in evaluating provisioner configuration blocks.
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AttachProvisionerSchema(name string, schema *configschema.Block)
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}
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// AttachSchemaTransformer finds nodes that implement
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// GraphNodeAttachResourceSchema, GraphNodeAttachProviderConfigSchema, or
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// GraphNodeAttachProvisionerSchema, looks up the needed schemas for each
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// and then passes them to a method implemented by the node.
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type AttachSchemaTransformer struct {
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Plugins *contextPlugins
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Config *configs.Config
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}
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func (t *AttachSchemaTransformer) Transform(g *Graph) error {
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if t.Plugins == nil {
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// Should never happen with a reasonable caller, but we'll return a
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// proper error here anyway so that we'll fail gracefully.
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return fmt.Errorf("AttachSchemaTransformer used with nil Plugins")
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}
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for _, v := range g.Vertices() {
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if tv, ok := v.(GraphNodeAttachResourceSchema); ok {
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addr := tv.ResourceAddr()
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mode := addr.Resource.Mode
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typeName := addr.Resource.Type
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providerFqn := tv.Provider()
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schema, version, err := t.Plugins.ResourceTypeSchema(providerFqn, mode, typeName)
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if err != nil {
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return fmt.Errorf("failed to read schema for %s in %s: %s", addr, providerFqn, err)
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}
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if schema == nil {
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log.Printf("[ERROR] AttachSchemaTransformer: No resource schema available for %s", addr)
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continue
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}
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log.Printf("[TRACE] AttachSchemaTransformer: attaching resource schema to %s", dag.VertexName(v))
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tv.AttachResourceSchema(schema, version)
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}
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if tv, ok := v.(GraphNodeAttachProviderConfigSchema); ok {
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providerAddr := tv.ProviderAddr()
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schema, err := t.Plugins.ProviderConfigSchema(providerAddr.Provider)
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if err != nil {
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return fmt.Errorf("failed to read provider configuration schema for %s: %s", providerAddr.Provider, err)
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}
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if schema == nil {
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log.Printf("[ERROR] AttachSchemaTransformer: No provider config schema available for %s", providerAddr)
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continue
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}
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log.Printf("[TRACE] AttachSchemaTransformer: attaching provider config schema to %s", dag.VertexName(v))
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tv.AttachProviderConfigSchema(schema)
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}
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if tv, ok := v.(GraphNodeAttachProvisionerSchema); ok {
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names := tv.ProvisionedBy()
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for _, name := range names {
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schema, err := t.Plugins.ProvisionerSchema(name)
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if err != nil {
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return fmt.Errorf("failed to read provisioner configuration schema for %q: %s", name, err)
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}
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if schema == nil {
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log.Printf("[ERROR] AttachSchemaTransformer: No schema available for provisioner %q on %q", name, dag.VertexName(v))
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continue
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}
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log.Printf("[TRACE] AttachSchemaTransformer: attaching provisioner %q config schema to %s", name, dag.VertexName(v))
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tv.AttachProvisionerSchema(name, schema)
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}
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}
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}
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return nil
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}
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