97 lines
2.2 KiB
Go
97 lines
2.2 KiB
Go
package terraform
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import (
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"errors"
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"fmt"
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"log"
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"github.com/hashicorp/terraform/config/module"
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"github.com/hashicorp/terraform/dag"
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)
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// ConfigTransformer is a GraphTransformer that adds all the resources
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// from the configuration to the graph.
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//
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// The module used to configure this transformer must be the root module.
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//
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// Only resources are added to the graph. Variables, outputs, and
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// providers must be added via other transforms.
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//
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// Unlike ConfigTransformerOld, this transformer creates a graph with
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// all resources including module resources, rather than creating module
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// nodes that are then "flattened".
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type ConfigTransformer struct {
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Concrete ConcreteResourceNodeFunc
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Module *module.Tree
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}
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func (t *ConfigTransformer) Transform(g *Graph) error {
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// If no module is given, we don't do anything
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if t.Module == nil {
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return nil
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}
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// If the module isn't loaded, that is simply an error
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if !t.Module.Loaded() {
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return errors.New("module must be loaded for ConfigTransformer")
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}
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// Start the transformation process
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return t.transform(g, t.Module)
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}
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func (t *ConfigTransformer) transform(g *Graph, m *module.Tree) error {
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// If no config, do nothing
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if m == nil {
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return nil
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}
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// Add our resources
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if err := t.transformSingle(g, m); err != nil {
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return err
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}
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// Transform all the children.
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for _, c := range m.Children() {
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if err := t.transform(g, c); err != nil {
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return err
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}
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}
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return nil
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}
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func (t *ConfigTransformer) transformSingle(g *Graph, m *module.Tree) error {
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log.Printf("[TRACE] ConfigTransformer: Starting for path: %v", m.Path())
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// Get the configuration for this module
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config := m.Config()
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// Build the path we're at
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path := m.Path()
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// Write all the resources out
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for _, r := range config.Resources {
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// Build the resource address
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addr, err := parseResourceAddressConfig(r)
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if err != nil {
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panic(fmt.Sprintf(
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"Error parsing config address, this is a bug: %#v", r))
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}
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addr.Path = path
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// Build the abstract node and the concrete one
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abstract := &NodeAbstractResource{Addr: addr}
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var node dag.Vertex = abstract
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if f := t.Concrete; f != nil {
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node = f(abstract)
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}
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// Add it to the graph
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g.Add(node)
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}
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return nil
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}
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