37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
package hcldec
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import (
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"github.com/hashicorp/hcl/v2"
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)
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// Variables processes the given body with the given spec and returns a
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// list of the variable traversals that would be required to decode
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// the same pairing of body and spec.
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//
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// This can be used to conditionally populate the variables in the EvalContext
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// passed to Decode, for applications where a static scope is insufficient.
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//
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// If the given body is not compliant with the given schema, the result may
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// be incomplete, but that's assumed to be okay because the eventual call
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// to Decode will produce error diagnostics anyway.
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func Variables(body hcl.Body, spec Spec) []hcl.Traversal {
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var vars []hcl.Traversal
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schema := ImpliedSchema(spec)
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content, _, _ := body.PartialContent(schema)
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if vs, ok := spec.(specNeedingVariables); ok {
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vars = append(vars, vs.variablesNeeded(content)...)
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}
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var visitFn visitFunc
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visitFn = func(s Spec) {
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if vs, ok := s.(specNeedingVariables); ok {
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vars = append(vars, vs.variablesNeeded(content)...)
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}
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s.visitSameBodyChildren(visitFn)
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}
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spec.visitSameBodyChildren(visitFn)
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return vars
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}
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