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This is part of a general effort to move all of Terraform's non-library package surface under internal in order to reinforce that these are for internal use within Terraform only. If you were previously importing packages under this prefix into an external codebase, you could pin to an earlier release tag as an interim solution until you've make a plan to achieve the same functionality some other way.
46 lines
2.1 KiB
Go
46 lines
2.1 KiB
Go
package blocktoattr
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import (
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"github.com/hashicorp/hcl/v2"
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"github.com/hashicorp/hcl/v2/ext/dynblock"
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"github.com/hashicorp/hcl/v2/hcldec"
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"github.com/hashicorp/terraform/internal/configs/configschema"
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)
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// ExpandedVariables finds all of the global variables referenced in the
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// given body with the given schema while taking into account the possibilities
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// both of "dynamic" blocks being expanded and the possibility of certain
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// attributes being written instead as nested blocks as allowed by the
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// FixUpBlockAttrs function.
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//
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// This function exists to allow variables to be analyzed prior to dynamic
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// block expansion while also dealing with the fact that dynamic block expansion
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// might in turn produce nested blocks that are subject to FixUpBlockAttrs.
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//
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// This is intended as a drop-in replacement for dynblock.VariablesHCLDec,
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// which is itself a drop-in replacement for hcldec.Variables.
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func ExpandedVariables(body hcl.Body, schema *configschema.Block) []hcl.Traversal {
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rootNode := dynblock.WalkVariables(body)
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return walkVariables(rootNode, body, schema)
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}
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func walkVariables(node dynblock.WalkVariablesNode, body hcl.Body, schema *configschema.Block) []hcl.Traversal {
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givenRawSchema := hcldec.ImpliedSchema(schema.DecoderSpec())
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ambiguousNames := ambiguousNames(schema)
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effectiveRawSchema := effectiveSchema(givenRawSchema, body, ambiguousNames, false)
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vars, children := node.Visit(effectiveRawSchema)
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for _, child := range children {
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if blockS, exists := schema.BlockTypes[child.BlockTypeName]; exists {
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vars = append(vars, walkVariables(child.Node, child.Body(), &blockS.Block)...)
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} else if attrS, exists := schema.Attributes[child.BlockTypeName]; exists && attrS.Type.IsCollectionType() && attrS.Type.ElementType().IsObjectType() {
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// ☝️Check for collection type before element type, because if this is a mis-placed reference,
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// a panic here will prevent other useful diags from being elevated to show the user what to fix
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synthSchema := SchemaForCtyElementType(attrS.Type.ElementType())
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vars = append(vars, walkVariables(child.Node, child.Body(), synthSchema)...)
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}
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}
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return vars
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}
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