mirror of
https://github.com/opentofu/opentofu.git
synced 2024-12-25 08:21:07 -06:00
86 lines
3.1 KiB
Go
86 lines
3.1 KiB
Go
// Copyright (c) HashiCorp, Inc.
|
|
// SPDX-License-Identifier: MPL-2.0
|
|
|
|
package lang
|
|
|
|
import (
|
|
"github.com/hashicorp/hcl/v2"
|
|
|
|
"github.com/opentofu/opentofu/internal/addrs"
|
|
"github.com/opentofu/opentofu/internal/configs/configschema"
|
|
"github.com/opentofu/opentofu/internal/lang/blocktoattr"
|
|
"github.com/opentofu/opentofu/internal/tfdiags"
|
|
)
|
|
|
|
// References finds all of the references in the given set of traversals,
|
|
// returning diagnostics if any of the traversals cannot be interpreted as a
|
|
// reference.
|
|
//
|
|
// This function does not do any de-duplication of references, since references
|
|
// have source location information embedded in them and so any invalid
|
|
// references that are duplicated should have errors reported for each
|
|
// occurence.
|
|
//
|
|
// If the returned diagnostics contains errors then the result may be
|
|
// incomplete or invalid. Otherwise, the returned slice has one reference per
|
|
// given traversal, though it is not guaranteed that the references will
|
|
// appear in the same order as the given traversals.
|
|
func References(parseRef ParseRef, traversals []hcl.Traversal) ([]*addrs.Reference, tfdiags.Diagnostics) {
|
|
if len(traversals) == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
var diags tfdiags.Diagnostics
|
|
refs := make([]*addrs.Reference, 0, len(traversals))
|
|
|
|
for _, traversal := range traversals {
|
|
ref, refDiags := parseRef(traversal)
|
|
diags = diags.Append(refDiags)
|
|
if ref == nil {
|
|
continue
|
|
}
|
|
refs = append(refs, ref)
|
|
}
|
|
|
|
return refs, diags
|
|
}
|
|
|
|
// ReferencesInBlock is a helper wrapper around References that first searches
|
|
// the given body for traversals, before converting those traversals to
|
|
// references.
|
|
//
|
|
// A block schema must be provided so that this function can determine where in
|
|
// the body variables are expected.
|
|
func ReferencesInBlock(parseRef ParseRef, body hcl.Body, schema *configschema.Block) ([]*addrs.Reference, tfdiags.Diagnostics) {
|
|
if body == nil {
|
|
return nil, nil
|
|
}
|
|
|
|
// We use blocktoattr.ExpandedVariables instead of hcldec.Variables or
|
|
// dynblock.VariablesHCLDec here because when we evaluate a block we'll
|
|
// first apply the dynamic block extension and _then_ the blocktoattr
|
|
// transform, and so blocktoattr.ExpandedVariables takes into account
|
|
// both of those transforms when it analyzes the body to ensure we find
|
|
// all of the references as if they'd already moved into their final
|
|
// locations, even though we can't expand dynamic blocks yet until we
|
|
// already know which variables are required.
|
|
//
|
|
// The set of cases we want to detect here is covered by the tests for
|
|
// the plan graph builder in the main 'terraform' package, since it's
|
|
// in a better position to test this due to having mock providers etc
|
|
// available.
|
|
traversals := blocktoattr.ExpandedVariables(body, schema)
|
|
return References(parseRef, traversals)
|
|
}
|
|
|
|
// ReferencesInExpr is a helper wrapper around References that first searches
|
|
// the given expression for traversals, before converting those traversals
|
|
// to references.
|
|
func ReferencesInExpr(parseRef ParseRef, expr hcl.Expression) ([]*addrs.Reference, tfdiags.Diagnostics) {
|
|
if expr == nil {
|
|
return nil, nil
|
|
}
|
|
traversals := expr.Variables()
|
|
return References(parseRef, traversals)
|
|
}
|