78 lines
2.3 KiB
Go
78 lines
2.3 KiB
Go
package terraform
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/hashicorp/hcl2/hcl"
|
|
|
|
"github.com/hashicorp/terraform/addrs"
|
|
"github.com/hashicorp/terraform/config/configschema"
|
|
"github.com/hashicorp/terraform/lang"
|
|
"github.com/hashicorp/terraform/tfdiags"
|
|
)
|
|
|
|
// EvalValidateSelfRef is an EvalNode implementation that checks to ensure that
|
|
// expressions within a particular referencable block do not reference that
|
|
// same block.
|
|
type EvalValidateSelfRef struct {
|
|
Addr addrs.Referenceable
|
|
Config hcl.Body
|
|
ProviderSchema **ProviderSchema
|
|
}
|
|
|
|
func (n *EvalValidateSelfRef) Eval(ctx EvalContext) (interface{}, error) {
|
|
var diags tfdiags.Diagnostics
|
|
addr := n.Addr
|
|
|
|
addrStrs := make([]string, 0, 1)
|
|
addrStrs = append(addrStrs, addr.String())
|
|
switch tAddr := addr.(type) {
|
|
case addrs.ResourceInstance:
|
|
// A resource instance may not refer to its containing resource either.
|
|
addrStrs = append(addrStrs, tAddr.ContainingResource().String())
|
|
}
|
|
|
|
if n.ProviderSchema == nil || *n.ProviderSchema == nil {
|
|
return nil, fmt.Errorf("provider schema unavailable while validating %s for self-references; this is a bug in Terraform and should be reported", addr)
|
|
}
|
|
|
|
providerSchema := *n.ProviderSchema
|
|
var schema *configschema.Block
|
|
switch tAddr := addr.(type) {
|
|
case addrs.Resource:
|
|
switch tAddr.Mode {
|
|
case addrs.ManagedResourceMode:
|
|
schema = providerSchema.ResourceTypes[tAddr.Type]
|
|
case addrs.DataResourceMode:
|
|
schema = providerSchema.DataSources[tAddr.Type]
|
|
}
|
|
case addrs.ResourceInstance:
|
|
switch tAddr.Resource.Mode {
|
|
case addrs.ManagedResourceMode:
|
|
schema = providerSchema.ResourceTypes[tAddr.Resource.Type]
|
|
case addrs.DataResourceMode:
|
|
schema = providerSchema.DataSources[tAddr.Resource.Type]
|
|
}
|
|
}
|
|
|
|
if schema == nil {
|
|
return nil, fmt.Errorf("no schema available for %s to validate for self-references; this is a bug in Terraform and should be reported", addr)
|
|
}
|
|
|
|
refs, _ := lang.ReferencesInBlock(n.Config, schema)
|
|
for _, ref := range refs {
|
|
for _, addrStr := range addrStrs {
|
|
if ref.Subject.String() == addrStr {
|
|
diags = diags.Append(&hcl.Diagnostic{
|
|
Severity: hcl.DiagError,
|
|
Summary: "Self-referential block",
|
|
Detail: fmt.Sprintf("Configuration for %s may not refer to itself.", addrStr),
|
|
Subject: ref.SourceRange.ToHCL().Ptr(),
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil, diags.NonFatalErr()
|
|
}
|