116 lines
3.3 KiB
Go
116 lines
3.3 KiB
Go
package terraform
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import (
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"log"
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"github.com/hashicorp/terraform/internal/addrs"
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"github.com/hashicorp/terraform/internal/configs"
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"github.com/hashicorp/terraform/internal/dag"
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"github.com/hashicorp/terraform/internal/tfdiags"
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"github.com/zclconf/go-cty/cty"
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)
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// NodeRootVariable represents a root variable input.
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type NodeRootVariable struct {
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Addr addrs.InputVariable
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Config *configs.Variable
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// RawValue is the value for the variable set from outside Terraform
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// Core, such as on the command line, or from an environment variable,
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// or similar. This is the raw value that was provided, not yet
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// converted or validated, and can be nil for a variable that isn't
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// set at all.
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RawValue *InputValue
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}
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var (
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_ GraphNodeModuleInstance = (*NodeRootVariable)(nil)
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_ GraphNodeReferenceable = (*NodeRootVariable)(nil)
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)
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func (n *NodeRootVariable) Name() string {
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return n.Addr.String()
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}
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// GraphNodeModuleInstance
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func (n *NodeRootVariable) Path() addrs.ModuleInstance {
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return addrs.RootModuleInstance
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}
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func (n *NodeRootVariable) ModulePath() addrs.Module {
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return addrs.RootModule
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}
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// GraphNodeReferenceable
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func (n *NodeRootVariable) ReferenceableAddrs() []addrs.Referenceable {
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return []addrs.Referenceable{n.Addr}
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}
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// GraphNodeExecutable
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func (n *NodeRootVariable) Execute(ctx EvalContext, op walkOperation) tfdiags.Diagnostics {
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// Root module variables are special in that they are provided directly
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// by the caller (usually, the CLI layer) and so we don't really need to
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// evaluate them in the usual sense, but we do need to process the raw
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// values given by the caller to match what the module is expecting, and
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// make sure the values are valid.
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var diags tfdiags.Diagnostics
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addr := addrs.RootModuleInstance.InputVariable(n.Addr.Name)
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log.Printf("[TRACE] NodeRootVariable: evaluating %s", addr)
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if n.Config == nil {
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// Because we build NodeRootVariable from configuration in the normal
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// case it's strange to get here, but we tolerate it to allow for
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// tests that might not populate the inputs fully.
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return nil
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}
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givenVal := n.RawValue
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if givenVal == nil {
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// We'll use cty.NilVal to represent the variable not being set at
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// all, which for historical reasons is unfortunately different than
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// explicitly setting it to null in some cases. In normal code we
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// should never get here because all variables should have raw
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// values, but we can get here in some historical tests that call
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// in directly and don't necessarily obey the rules.
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givenVal = &InputValue{
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Value: cty.NilVal,
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SourceType: ValueFromUnknown,
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}
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}
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finalVal, moreDiags := prepareFinalInputVariableValue(
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addr,
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givenVal,
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n.Config,
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)
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diags = diags.Append(moreDiags)
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if moreDiags.HasErrors() {
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// No point in proceeding to validations then, because they'll
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// probably fail trying to work with a value of the wrong type.
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return diags
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}
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ctx.SetRootModuleArgument(addr.Variable, finalVal)
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moreDiags = evalVariableValidations(
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addrs.RootModuleInstance.InputVariable(n.Addr.Name),
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n.Config,
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nil, // not set for root module variables
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ctx,
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)
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diags = diags.Append(moreDiags)
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return diags
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}
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// dag.GraphNodeDotter impl.
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func (n *NodeRootVariable) DotNode(name string, opts *dag.DotOpts) *dag.DotNode {
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return &dag.DotNode{
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Name: name,
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Attrs: map[string]string{
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"label": n.Name(),
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"shape": "note",
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},
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}
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}
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