opentofu/configs/hcl2shim/single_attr_body.go
Martin Atkins 39e609d5fd vendor: switch to HCL 2.0 in the HCL repository
Previously we were using the experimental HCL 2 repository, but now we'll
shift over to the v2 import path within the main HCL repository as part of
actually releasing HCL 2.0 as stable.

This is a mechanical search/replace to the new import paths. It also
switches to the v2.0.0 release of HCL, which includes some new code that
Terraform didn't previously have but should not change any behavior that
matters for Terraform's purposes.

For the moment the experimental HCL2 repository is still an indirect
dependency via terraform-config-inspect, so it remains in our go.sum and
vendor directories for the moment. Because terraform-config-inspect uses
a much smaller subset of the HCL2 functionality, this does still manage
to prune the vendor directory a little. A subsequent release of
terraform-config-inspect should allow us to completely remove that old
repository in a future commit.
2019-10-02 15:10:21 -07:00

86 lines
2.2 KiB
Go

package hcl2shim
import (
"fmt"
hcl2 "github.com/hashicorp/hcl/v2"
)
// SingleAttrBody is a weird implementation of hcl2.Body that acts as if
// it has a single attribute whose value is the given expression.
//
// This is used to shim Resource.RawCount and Output.RawConfig to behave
// more like they do in the old HCL loader.
type SingleAttrBody struct {
Name string
Expr hcl2.Expression
}
var _ hcl2.Body = SingleAttrBody{}
func (b SingleAttrBody) Content(schema *hcl2.BodySchema) (*hcl2.BodyContent, hcl2.Diagnostics) {
content, all, diags := b.content(schema)
if !all {
// This should never happen because this body implementation should only
// be used by code that is aware that it's using a single-attr body.
diags = append(diags, &hcl2.Diagnostic{
Severity: hcl2.DiagError,
Summary: "Invalid attribute",
Detail: fmt.Sprintf("The correct attribute name is %q.", b.Name),
Subject: b.Expr.Range().Ptr(),
})
}
return content, diags
}
func (b SingleAttrBody) PartialContent(schema *hcl2.BodySchema) (*hcl2.BodyContent, hcl2.Body, hcl2.Diagnostics) {
content, all, diags := b.content(schema)
var remain hcl2.Body
if all {
// If the request matched the one attribute we represent, then the
// remaining body is empty.
remain = hcl2.EmptyBody()
} else {
remain = b
}
return content, remain, diags
}
func (b SingleAttrBody) content(schema *hcl2.BodySchema) (*hcl2.BodyContent, bool, hcl2.Diagnostics) {
ret := &hcl2.BodyContent{}
all := false
var diags hcl2.Diagnostics
for _, attrS := range schema.Attributes {
if attrS.Name == b.Name {
attrs, _ := b.JustAttributes()
ret.Attributes = attrs
all = true
} else if attrS.Required {
diags = append(diags, &hcl2.Diagnostic{
Severity: hcl2.DiagError,
Summary: "Missing attribute",
Detail: fmt.Sprintf("The attribute %q is required.", attrS.Name),
Subject: b.Expr.Range().Ptr(),
})
}
}
return ret, all, diags
}
func (b SingleAttrBody) JustAttributes() (hcl2.Attributes, hcl2.Diagnostics) {
return hcl2.Attributes{
b.Name: {
Expr: b.Expr,
Name: b.Name,
NameRange: b.Expr.Range(),
Range: b.Expr.Range(),
},
}, nil
}
func (b SingleAttrBody) MissingItemRange() hcl2.Range {
return b.Expr.Range()
}