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71e989ba3e
The value-conversion machinery is also needed in the main "terraform" package to help us populate our HCL2 evaluation scope, so a subset of the shim functions move here into a new package where they can be public. Some of them remain private within the config package since they depend on some other symbols in the config package, and they are not needed by outside callers anyway.
86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
package hcl2shim
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import (
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"fmt"
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hcl2 "github.com/hashicorp/hcl2/hcl"
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)
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// SingleAttrBody is a weird implementation of hcl2.Body that acts as if
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// it has a single attribute whose value is the given expression.
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//
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// This is used to shim Resource.RawCount and Output.RawConfig to behave
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// more like they do in the old HCL loader.
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type SingleAttrBody struct {
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Name string
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Expr hcl2.Expression
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}
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var _ hcl2.Body = SingleAttrBody{}
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func (b SingleAttrBody) Content(schema *hcl2.BodySchema) (*hcl2.BodyContent, hcl2.Diagnostics) {
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content, all, diags := b.content(schema)
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if !all {
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// This should never happen because this body implementation should only
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// be used by code that is aware that it's using a single-attr body.
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diags = append(diags, &hcl2.Diagnostic{
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Severity: hcl2.DiagError,
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Summary: "Invalid attribute",
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Detail: fmt.Sprintf("The correct attribute name is %q.", b.Name),
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Subject: b.Expr.Range().Ptr(),
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})
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}
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return content, diags
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}
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func (b SingleAttrBody) PartialContent(schema *hcl2.BodySchema) (*hcl2.BodyContent, hcl2.Body, hcl2.Diagnostics) {
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content, all, diags := b.content(schema)
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var remain hcl2.Body
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if all {
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// If the request matched the one attribute we represent, then the
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// remaining body is empty.
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remain = hcl2.EmptyBody()
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} else {
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remain = b
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}
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return content, remain, diags
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}
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func (b SingleAttrBody) content(schema *hcl2.BodySchema) (*hcl2.BodyContent, bool, hcl2.Diagnostics) {
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ret := &hcl2.BodyContent{}
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all := false
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var diags hcl2.Diagnostics
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for _, attrS := range schema.Attributes {
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if attrS.Name == b.Name {
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attrs, _ := b.JustAttributes()
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ret.Attributes = attrs
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all = true
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} else if attrS.Required {
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diags = append(diags, &hcl2.Diagnostic{
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Severity: hcl2.DiagError,
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Summary: "Missing attribute",
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Detail: fmt.Sprintf("The attribute %q is required.", attrS.Name),
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Subject: b.Expr.Range().Ptr(),
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})
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}
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}
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return ret, all, diags
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}
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func (b SingleAttrBody) JustAttributes() (hcl2.Attributes, hcl2.Diagnostics) {
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return hcl2.Attributes{
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b.Name: {
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Expr: b.Expr,
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Name: b.Name,
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NameRange: b.Expr.Range(),
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Range: b.Expr.Range(),
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},
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}, nil
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}
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func (b SingleAttrBody) MissingItemRange() hcl2.Range {
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return b.Expr.Range()
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}
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