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c937c06a03
Due to how deeply the configuration types go into Terraform Core, there isn't a great way to switch out to HCL2 gradually. As a consequence, this huge commit gets us from the old state to a _compilable_ new state, but does not yet attempt to fix any tests and has a number of known missing parts and bugs. We will continue to iterate on this in forthcoming commits, heading back towards passing tests and making Terraform fully-functional again. The three main goals here are: - Use the configuration models from the "configs" package instead of the older models in the "config" package, which is now deprecated and preserved only to help us write our migration tool. - Do expression inspection and evaluation using the functionality of the new "lang" package, instead of the Interpolator type and related functionality in the main "terraform" package. - Represent addresses of various objects using types in the addrs package, rather than hand-constructed strings. This is not critical to support the above, but was a big help during the implementation of these other points since it made it much more explicit what kind of address is expected in each context. Since our new packages are built to accommodate some future planned features that are not yet implemented (e.g. the "for_each" argument on resources, "count"/"for_each" on modules), and since there's still a fair amount of functionality still using old-style APIs, there is a moderate amount of shimming here to connect new assumptions with old, hopefully in a way that makes it easier to find and eliminate these shims later. I apologize in advance to the person who inevitably just found this huge commit while spelunking through the commit history.
72 lines
1.9 KiB
Go
72 lines
1.9 KiB
Go
package terraform
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import (
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"github.com/hashicorp/terraform/configs"
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"github.com/hashicorp/terraform/dag"
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)
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// FlatConfigTransformer is a GraphTransformer that adds the configuration
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// to the graph. The module used to configure this transformer must be
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// the root module.
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//
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// This transform adds the nodes but doesn't connect any of the references.
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// The ReferenceTransformer should be used for that.
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//
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// NOTE: In relation to ConfigTransformer: this is a newer generation config
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// transformer. It puts the _entire_ config into the graph (there is no
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// "flattening" step as before).
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type FlatConfigTransformer struct {
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Concrete ConcreteResourceNodeFunc // What to turn resources into
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Config *configs.Config
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}
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func (t *FlatConfigTransformer) Transform(g *Graph) error {
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// We have nothing to do if there is no configuration.
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if t.Config == nil {
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return nil
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}
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return t.transform(g, t.Config)
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}
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func (t *FlatConfigTransformer) transform(g *Graph, config *configs.Config) error {
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// If we have no configuration then there's nothing to do.
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if config == nil {
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return nil
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}
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// Transform all the children.
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for _, c := range config.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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module := config.Module
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// For now we assume that each module call produces only one module
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// instance with no key, since we don't yet support "count" and "for_each"
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// on modules.
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// FIXME: As part of supporting "count" and "for_each" on modules, rework
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// this so that we'll "expand" the module call first and then create graph
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// nodes for each module instance separately.
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instPath := config.Path.UnkeyedInstanceShim()
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for _, r := range module.ManagedResources {
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addr := r.Addr().Absolute(instPath)
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abstract := &NodeAbstractResource{
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Addr: addr,
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Config: r,
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}
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// Grab the address for this resource
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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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g.Add(node)
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}
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return nil
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}
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